Currently applied filters
Energy Generation PlantsAuthor(s): Turner, D.M. & Mayes, I.
Published: 2005
Publisher: Department of Trade and Industry
This document is a report for the project titled 'Advanced Optimisation - Coal Fired Power Plant Operations'.
In recent years the efforts to reduce nitrogen oxide (NOx) emissions from power stations have resulted in operational modifications including the fitting of low - NOx burners. These modifications are expensive and generally have an adverse effect upon plant performance, resulting in an increase in unburnt carbon. To reduce these adverse effects, on-line optimisers have been developed as an enhancement to the power station's digital control system (DCS). GNOCIS (Generic NOx Optimisation Control Intelligent System) is the main optimiser used within the UK. This is a neural network based optimiser that takes various control parameters such as mill feeder speeds, excess oxygen, burner tilt and load as inputs and predicts the resultant NOx emissions and carbon-in-ash levels. In fact the models are usually used in reverse with boiler control settings being provided by the model to optimise the emissions.
The success of the boiler optimisation models has suggested that on-line optimisation can be used in other parts of the power station, eg thermal efficiency, electrostatic precipitator (ESP). Although each local optimiser is able to perform its task well individually there will be occasions when the individual packages will provide conflicting advice. The purpose of this unit optimisation project is to develop an integrated approach to unit optimisation and develop an overall optimiser that is able to resolve any conflicts between the individual optimisers.
This report is divided into the following sections:Author(s): Maskell, R.
Published: 2005
Publisher: Department of Trade and Industry
This document is a report for the project titled 'Advanced PF Power Plant - Improved Materials for Boilers and Steam Turbines'.
In 1997 the Foresight Task Force identified advanced pulverised fuel technology as having the greatest market potential of the Clean Coal Technologies over the following 15 years. This task force, together with the Institute of Materials task force on materials, highlighted that the economic and environmental performance of this technology was currently limited by the performance of high temperature materials for boilers and steam turbines. As a consequence of this, the required R&D programmes perceived as being necessary for the development of improved materials were outlined.
This programme is receiving support through the EC's Thermie framework and from the DTI. It has a far longer timescale to fruition than the present initiative, as it will require inclusion of a demonstration phase. The technology involved in the present programme will be commercially exploitable much earlier, and, even after introduction of technology based on nickel based alloys, it will continue to be competitive in markets particularly sensitive to capital cost rather than through-life cost. The present programme is implemented through a wider European collaboration under the auspices of COST 522; as such collaboration reduces the costs of implementation and ensures that the UK remains abreast of the state-of-the-art in this technology.
This report is divided into the following sections:Author(s): DTI
Published: 2005
Publisher: Department of Trade and Industry
This document is a profile for the project titled 'Improved Materials for Boilers and Steam Turbines'.
The principal aim of this project was to develop and demonstrate the suitability of advanced materials and components for the power industry. Such materials and components were aimed at steam temperatures of 620 - 650°C. Specific areas covered were:
Author(s): DTI
Published: 2004
Publisher: Department of Trade and Industry
This document is a profile for the project titled 'Impact on Plant Performance and Ash Disposal'.
This proposal aims to provide coal-fired power stations with a simple, cost effective, means of improving combustion efficiency and reducing particulate emissions by re-firing ash and/or mineral addition to the coal. This project will:Author(s): DTI
Published: 2005
Publisher: Department of Trade and Industry
This document is a summary for the project titled 'Impact on Plant Performance and Ash Disposal'.
The specific objectives of this project were as follows:This project has shown that ash re-firing is both technically and financially viable on existing coal fired power plant. It is believed that commercial scale replication of the concept could be undertaken by plant operators using the data gathered by this project as the basis for a full scale development.
This profile contains information on the project's:Author(s): Riley, GS, Beeley, T, Williamson, J, Wigley, F, Russell, NV, Zandi, M, Ricketts, B & Cooper, PR
Published: 2005
Publisher: Department of Trade and Industry
This document is the final report for the project titled 'Assessment of Ash Re-firing and Mineral Addition - Impact on Plant Performance and Ash Disposal'.
Pulverised coal fired generation plant will continue to play a major role in the world-wide electrical power market for the foreseeable future. Emission standards have become tighter in recent years and coal fired plant has been required to become more flexible in terms of operating regimes. The changes have led to increases in the levels of unburnt carbon in ash, deposition patterns in boilers as well as increased pressure on the performance in electrostatic precipitators.
This project, to investigate if ash refiring and mineral addition were viable methods of improving boiler efficiency and reducing emissions, was supported by the DTI as part of its Cleaner Coal Programme. The project involved the collaboration of two generators (RWE npower and TXU Europe), a major coal supplier (UK Coal) plus two university groups (Imperial College London and the University of Sheffield)
This report has a summary and is divided into the following sections:Author(s): Pritchard, D.
Published: 2005
Publisher: Department of Trade and Industry
The aim of this project was to further develop micro turbine indirect firing and to develop this into a biomass generator, building on the success of the previous project. The system was redesigned and rebuilt using the experience gained and the recommendations reported in our last project. The efficiency, maintenance and safety of the system was improved through this development project.
The Specific aims were:
The main achievements of these projects are:
Author(s): The TESBiC consortium
Published: 2012
Publisher: ETI
Author(s): ETI
Published: 2012
Publisher: ETI
Author(s): ETI
Published: 2012
Publisher: ETI
Author(s): The TESBiC consortium
Published: 2011
Publisher: ETI
Author(s): The TESBiC consortium
Published: 2011
Publisher: ETI
Author(s): ETI
Published: 2012
Publisher: ETI
Author(s): The TESBiC consortium
Published: 2011
Publisher: ETI
Author(s): The TESBiC consortium
Published: 2012
Publisher: ETI
Author(s): Bhave, A. and Livingston, B.
Published: 2012
Publisher: ETI
Author(s): The TESBiC consortium
Published: 2012
Publisher: ETI
Author(s): The TESBiC consortium
Published: 2012
Publisher: ETI
Author(s): ETI
Published: 2010
Publisher: ETI
Author(s): Chaudry, M., Ekins, P., Kannan, R., Shakoor, A., Skea, J., Strbac, G., Wang, X. and Whitaker, J.
Published: 2009
Publisher: UKERC
This report explores ways of enhancing the resilience of the UK energy system to withstand external shocks and examines how such measures interact with those designed to reduce CO2 emissions. The concept of resilience explored and a set of indicators is developed to define quantitatively the characteristics of a resilient energy system. In the report we systematically test the response of the UK energy system under different scenarios to hypothetical shocks. These are all assumed to involve the loss of gas infrastructure. We then assess mitigating measures which can help to reduce the impact of these shocks and test their cost effectiveness using an insurance analogy.
Author(s): Colechin, M
Published: 2004
Publisher: Department of Trade and Industry
This document is a report for the project titled 'Carbon Burnout Project - Coal Fineness Effects'.
Carbon-in-ash presents an obvious cost to coal-fired generation plant in terms of lost fuel. High levels of carbon-in-ash can also inhibit the efficiency of electrostatic precipitators, which in turn can lead to increased particulate emissions, while the potential for selling fly-ash is dependent upon the level of carbon in the ash and excessive levels can result in additional disposal costs.
The aim of DTI project 226 has been to establish good quality plant and rig data to demonstrate the effect of changing coal fineness on carbon burnout in a controlled manner, which can then be used to support computational fluid dynamics (CFD) and
engineering models of the process. The project was designed to achieve this through:
The full scale plant trials were successfully completed at Powergen's Kingsnorth Power Station, establishing plant data that demonstrates the effect of changing coal fineness on carbon burnout in a controlled manner. A full set of tests were also completed on Powergen's CTF, operating with four different fuel grind sizes. During these tests both carbon-in-ash and NOX levels were seen to increase with increasing fuel particle size.
This report is divided into the following sections:Author(s): DTI
Published: 2005
Publisher: Department of Trade and Industry
The objectives of this project are to:
The primary aim and objective of the work is to develop the technical and economic information that will assist existing or future owners and investors in the power industry to evaluate the advantages of utilising coal based syngas generated in a Gasification Enabling Module (GEM) to refuel existing NGCC plants which have the capability to remove 85% or more of the CO2 prior to combustion. To achieve this objective, the study will evaluate GEMs located both adjacent and remote from existing NGCC plants and will evaluate the performance of the GEMs both before and after carbon capture. The results to date on these flow schemes are based on preliminary conceptual technical evaluations and preliminary cost estimates.
This profile contains information on the project's:Author(s): McGlade, C., Ekins, P., Bradshaw, M. and Watson, J.
Published: 2015
Publisher: UKERC
A briefing paper Dr Christophe McGlade and Professor Paul Ekins, UCL Institute for Sustainable Resources and UCL Energy Institute, University College London; Professor Michael Bradshaw, Warwick Business School, University of Warwick; and Professor Jim Watson, UK Energy Research Centre.
The research on which this brief paper draws was carried out by the UK Energy Research Centre (UKERC). The views expressed are those of the authors, rather than of any institution to which they may be affiliated.
Two recently published reports (McGlade & Ekins (2015), McGladeet al.(2014)) examine possible futures for fossil fuels, with a particular focus on the bridging role that natural gas may be able to play during a transition to a global low-carbon energy system. A related report (Bradshawet al.2014) considers the UKs global gas c
Author(s): Winstanley, P.
Published: 2019
Publisher: ETI
Author(s): Middleton, M.
Published: 2016
Publisher: ETI
Author(s): Middleton, M.
Published: 2015
Publisher: ETI
Author(s): ETI
Published: 2011
Publisher: ETI
Author(s): ETI
Published: 2012
Publisher: ETI
Author(s): ETI
Published: 2012
Publisher: ETI
Author(s): ETI
Published: 2012
Publisher: ETI
Author(s): ETI
Published: 2012
Publisher: ETI
Author(s): Oakey, J. and Patchigolla, K.
Published: 2011
Publisher: ETI
Author(s): ETI
Published: 2011
Publisher: ETI
Author(s): Wagland, S.T. and Longhurst, P.J.
Published: 2012
Publisher: ETI
Author(s): Wagland, S.T. and Longhurst, P.J.
Published: 2010
Publisher: ETI
Author(s): Wagland, S.T. and Longhurst, P.J.
Published: 2012
Publisher: ETI
Author(s): ETI
Published: 2011
Publisher: ETI
Author(s): Van Romunde, Z. and Kim, M.
Published: 2011
Publisher: ETI
Author(s): Brule, M., Eyler, D., Oakey, J., Patchigolla, K., Pellegrini-Susini, G. and Van Romunde, Z.
Published: 2011
Publisher: ETI
Author(s): Brule, M., and Eyler, D.
Published: 2010
Publisher: ETI
Author(s): Williams, M., Jaitner, N., Lorton, C.
Published: 2010
Publisher: ETI
Author(s): Centre for Process Innovation Services
Published: 2009
Publisher: ETI
Author(s): Donegan, S., Kearney, J., Repalle, J. and Van Romunde, Z.
Published: 2010
Publisher: ETI
Author(s): Hillier, G. and Donegan, S.
Published: 2011
Publisher: ETI
Author(s): Hillier, G. and Donegan, S.
Published: 2011
Publisher: ETI
Author(s): Phillips, F.
Published: 2009
Publisher: ETI
Author(s): Donegan, S. and Hillier, G.
Published: 2011
Publisher: ETI
Author(s): Ziman, H., Hillier, G. and Donegan, S.
Published: 2011
Publisher: ETI
Author(s): ETI
Published: 2011
Publisher: ETI
Author(s): Gandy, S., Mkushi, G., Mistry, P.
Published: 2011
Publisher: ETI
Author(s): Mistry, P., Gandy, S.
Published: 2011
Publisher: ETI
Author(s): AEA Technology Ltd
Published: 2011
Publisher: ETI
Author(s): Conversion and Resource Evaluation Ltd
Published: 2011
Publisher: ETI
Author(s): Hillier, G. and Donegan, S.
Published: 2011
Publisher: ETI
Author(s): AEA Technology Ltd
Published: 2011
Publisher: ETI
Author(s): Subtheme Group
Published: 2019
Publisher: Department of Business, Energy and Industrial Strategy
Author(s): Fowler, A, Bell, D, Cao, C, Fowler, R, Oliver, P, Greenough, C & Timmis, P
Published: 2005
Publisher: Department of Trade and Industry
This document is a summary report for the project titled 'Enhanced Efficiency Steam Turbine Blading - For Cleaner Coal Plant'.
The aim of this project was to increase the efficiency of the short height stages typically found in high pressure steam turbine cylinders. For coal fired power plant, this will directly lead to a reduction in the amount of fuel required to produce electrical power, resulting in lower power station emissions. The continual drive towards higher cycle efficiencies demands increased inlet steam temperatures and pressures, which necessarily leads to shorter blade heights. Further advances in blading for short height stages are required in order to maximise the benefit. To achieve this, an optimisation of existing 3 dimensional designs was carried out and a new 3 dimensional fixed blade for use in the early stages of the high pressure turbine was developed.
The milestones for the project were defined around the following specific
objectives:
The work that CCLRC undertook on the ALSTOM C.F.D. code was very successful. The 3-D flow solver code supplied by ALSTOM was analysed and two methods of parallisation implemented. The OMP method of parallisation is only suitable for use on "shared memory" multi-processor computers. The MPI method of parallisation is suitable for use on "distributed memory" computers, sometimes know as "Beowulf Clusters", which tend to be significantly cheaper to buy than large shared memory computers of similar processing power. As a result of this work, ALSTOM Power have purchased a Beowulf Cluster, and it has become the main workhorse of the Aerodynamics Group.
This report is divided into the following sections:Author(s): DTI
Published: 2002
Publisher: Department of Trade and Industry
The aim of this project is to increase the efficiency of the short height stages typically found in high pressure steam turbine cylinders. This will directly lead to a reduction in the amount of coal required to produce electrical power, resulting in lower power station emissions. In order to do this, the following tasks must be undertaken:
The benefits of the project include:
Author(s): DTI
Published: 2005
Publisher: Department of Trade and Industry
The aim of this project was to increase the efficiency of the short height stages typically found in high pressure steam turbine cylinders. For coal-fired power plant, this would directly lead to a reduction in the amount of fuel required to produce electrical power, resulting in lower power station emissions. The continual drive towards higher cycle efficiencies demands increased inlet steam temperatures and pressures, which necessarily leads to shorter blade heights. The specific objectives were as follows:
The aim of this project was to increase the efficiency of the short height stages typically found in high pressure steam turbine cylinders. Whilst the reasons for this are still not understood, the result has led to changes in the way that such blades will be designed in the future. It also provides a challenging test case for future CFD code validation.
This summary provides information on:Author(s): DTI
Published: 2005
Publisher: Department of Trade and Industry
The objectives of this project are:
This project was set up by E.ON to investigate ways of putting a monetary cost to plant inflexibility. The project was undertaken in collaboration with UMISTs Department of Process Integration, who are world leaders in the science of process optimisation and who possess the necessary optimisation and computing expertise. The DTIs interest is primarily because of the importance of this subject to IGCC; however, the issue is of general applicability to all types of generating technology.
This summary provides information on:Author(s): DTI
Published: 2005
Publisher: Department of Trade and Industry
The objectives for this project are:
Improved efficiency in coal-fired power plant can be achieved by increasing steam temperatures and pressures, and this has been made practically possible over a number of years by the development of steels with improved creep strength enabling operation up to 600-620°C at present. In Europe a new initiative (COST 536) has been launched, entitled 'Alloy Development for Critical Components of Environmentally Friendly Power Plant (ACCEPT)', and encompasses all stages in the development and validation of advanced steels capable of operation at temperatures up to 650°C. The primary route of achieving this is through the development of new alloying and coating concepts.
This project focuses on the validation testing of the capabilities of a new class of steels and their weldments at temperatures up to 650°C and the longer term qualification of advanced steels developed under COST 522. The project has been accepted for inclusion in the COST 536 initiative.
This profile contains information on the project's:Author(s): Fackrell, J.E., Tabberer, R.J., Young, J.B. & Wu, Z
Published: 2005
Publisher: Department of Trade and Industry
This document is the final report for the project titled 'Gas Turbines Fired on Coal Derived Gases - Modelling of Particulate and Vapour Deposition'. This report is titled 'Alkali Salt Vapour Deposition on Gas Turbine Blades.'
The following report describes the development of a computer program for calculating deposition rates of alkali salts from two-dimensional turbulent boundary layer flows on turbine blades. The description of the program was originally submitted as the Milestone 1 Report of the project. This description is included here, but with additional sections summarising the background and theoretical approach of the work and the application of the code to an example cleaner-coal turbine.
The development and testing of the new code involved:
There is considerable potential for exploitation of the existing computer code. As it stands, the code should be of interest to those companies involved in the design and manufacture of the type of heavy-duty industrial gas turbine which will be required in the future for coal-fired operation. The main companies operating worldwide are General Electric in the United States, Alstom in the United Kingdom, Siemens in Europe, and Mitsubishi and Hitachi in Japan. The Whittle Laboratory at Cambridge University has close contact with most of these (and other) companies and it is proposed to investigate the possibilities for marketing of the code and establishing other consulting arrangements.
There is also potential for further scientific development of the thermochemical modelling. Although attention has been confined in the present project to the salts of sodium and potassium and their behaviour in high temperature gas flows, the method of analysis is fairly general and could be extended to encompass other situations. For example, two problems of current interest which might respond to similar modelling techniques are the transport of corrosive vanadium salts to gas turbine blades in conventional gas turbines and corrosion of steam turbine blades by sodium salts present in the feedwater. In the United Kingdom, companies such as Rolls-Royce, Alstom and Siemens will be approached for discussion on the possibility of extending the modelling to deal with these and other technical problems.
This report is divided into the following sections:The remainder of the report consists of a user manual for VAPOURDEP written by J.B. Young, and Appendices:
Author(s): ETI
Published: 2018
Publisher: ETI
Author(s): Michels, H.J., Lindstedt, P., Moodie, K., Santon, R.
Published: 2012
Publisher: ETI
Author(s): Ferguson, S., Skinner, G. and Abbott, T.
Published: 2013
Publisher: ETI
Author(s): Ray, R., Abbott, T. and Phillipson, M.
Published: 2013
Publisher: ETI
Author(s): Abbott, T.
Published: 2013
Publisher: ETI
Author(s): ETI
Published: 2014
Publisher: ETI
Author(s): Davison, J.
Published: 2017
Publisher: ETI
Author(s): Foster Wheeler
Published: 2014
Publisher: ETI
Author(s): DTI
Published: 2004
Publisher: Department of Trade and Industry
The objectives for this project are:
The overall aim of the project was to develop new tools for the reliable and rapid prediction of combustion efficiency of coals in pf-fired utility boilers. This would give the ability to improve fuel selection and chose the most appropriate burner and boiler design for a given fuel.
The conclusions of this project are:
Author(s): DTI
Published: 2005
Publisher: Department of Trade and Industry
The aims of this project were:
This project is concerned with the design and demonstration of a high efficiency cyclone grit arrester which could potentially achieve a particulate collection efficiency of in excess of 98%, making it suitable for reducing the emissions from boilers of this size and type.
The successful particulate and emission reductions would enable coal to be a viable fuel for heating and process applications in the smaller range of boilers in terms of environmental acceptability.
The conclusions from this project are:
Author(s): Proctor, A.
Published: 2005
Publisher: Department of Trade and Industry
There are thousands of coal-fired boilers in the commercial and industrial sector throughout the world with the biggest impact on the environment being particulate emissions. The market area in terms of boiler output is from 0.6MWth - 6.5MWth output and the number of boilers when aggregated, results in a large potential source of pollutants. The types of combustion equipment commonly used in this sector in China, India, and the CIS are chain grate or travelling grate stokers.
The results of the trials conducted in this project exceeded expectations in terms of measured particulate emissions with low rates being achieved in both high and medium fire tests, significantly below the 150mg/m3 proposed in the Small combustion Plant Directive. If further work was carried out then it could be possible to achieve further reductions in emissions as some of the test results showed emissions levels at around 50-60mg/m3.
This report is divided into the following sections:Author(s): DTI
Published: 2001
Publisher: Department of Trade and Industry
This proposal is concerned with improving the design, efficiency and environmental performance of low-grade coal burning appliances - commonly used in China, India and the former Soviet Union (FSU) - which produce unacceptable environmental pollution mainly in the form of particulate emissions. In the initial draft of the small combustion plant directive limits for particulates are set at 150 mg/m3 for boilers less than 10 MW, and 50 mg/m3 for those between 10-50 MW. These suggested figures raise considerable challenges for industry. Our objectives are therefore:
For new boiler plant the successful particulate and emission reductions would enable coal to be a viable fuel for heating and process applications in the smaller range of boilers. In countries such as India, China and the FSU that currently burn low-grade coal as their primary energy source, the impacts of this work could be essential to its future use.
This profile contains information on the project's:Author(s): Sharick, A. and Webb, J.
Published: 2016
Publisher: UKERC
UKERC co-hosted a meeting last month with DECC and ETI to seek input and feedback on plans for the 300 million in heat network capital expenditures announced in the government's Spending Review. Amber Sharick, UKERC Business Engagement Manager, and Jan Webb, UKERC Researcher & Professor of Sociology of Organisations, University of Edinburgh, report on the discussions.
Author(s): Bland, T.
Published: 2004
Publisher: Department of Trade and Industry
The Merlin Wind Turbine Installation System has been designed and patented by The Engineering Business Ltd (EB). This project, phase 1 of the development, comprises a feasibility study carried out by EB, and part funded by the DTI with the key objective of 'Investigating the technical and economical viability of the Merlin system as an alternative technique for installing offshore wind turbines'.
This is the final report of the project, encompassing all project activities completed by EB to determine the fundamental engineering principles and the economics to support the system design.
The feasibility study concludes overall that:
Author(s): DTI
Published: 2005
Publisher: Department of Trade and Industry
The objectives for this project are:
Tidal energy is a largely untapped natural renewable energy resource and approximately 92% of available UK tidal energy resource exists in deep water.
SMD Hydrovision (SMDH) is a company with over 30 years experience designing subsea machinery and has developed the TidEl concept to exploit this resource.
TidEl consists of a pair of turbine/generators that are fixed together by a cross beam and secured to the seabed using a novel mooring system.
It is planned in this project to install a 1MW TidEl device at the EMEC facility off Eday in the Orkney Isles in 2006, where it will be subject to extensive testing over a prolonged period.
This profile contains information on the project's:Author(s): Bhinder, M.A., Mingham, C.G., Causon, D.M., Rahmati, M.T., Aggidis, G.A. and Chaplin, R.V.
Published: 2009
Publisher: Joule Centre
Numerical modelling of a WEC is presented in this paper along with some details of the experimental setup. Issues related to the numerical modelling of the single DOF (degree-of-freedom) motion of a surging point absorber WEC (wave energy converter) are outlined and a comparison with experimental data is presented. A commercial CFD code Flow-3D has been used for the numerical modelling and the ability of the code to simulate free surface linear waves and wavestructure interaction is evaluated in this paper.
The work is aimed at simulating a surging wave energy converter to achieve an optimized shape and to predict output power at a higher or full scale. The findings of this study may also serve as a reference point for the use of a commercial code such as Flow-3D for simulating such problems.
This report is divided into the following sections:Author(s): Bradley, S.
Published: 2016
Publisher: ETI
Author(s): DTI
Published: 2002
Publisher: Department of Trade and Industry
The objectives of this project are:
Retrofit installations of low NOx systems are often constrained to some extent by the configuration of the existing plant. These practical constraints can be avoided in the design process for new plant. Factors such as the size, number and pitching of burners are selected to optimise furnace performance in terms of heat input, residence time, corrosion, pollutant formation and economics. The identification of optimum burner size and pitch with particular regard to NOx emissions and carbon burnout is of significant interest.
The typical burner size employed in existing front and opposed wall fired furnaces, of 300 and 500 MWe, is between 40 and 60 MWth. A non-dimensionalised horizontal, vertical and wall clearance pitch of 2.75d was deemed to be representative of all units studied. However, several units feature tighter pitches.
Comparison of physical model data with predictions from a CFD model of the physical model showed reasonable agreement. Mathematical modelling, for the prediction of the flow field within a multi-burner furnace, can therefore be applied with confidence.
For lower NOx emission, with no carbon burnout penalty, fewer larger burners are preferable to more burners of a lower thermal heat input. Employing larger burners is also economically advantageous.
Modelling predictions were found to be consistent with previous research by IFRF into the effect of burner scaling technique on NOx emission. When considering constant-velocity scaling, flame chemistry becomes dominant over mixing as scale is reduced and so a higher NOx emission results from rapid fuel and air mixing.
This profile contains information on the project's:Author(s): DTI
Published: 2001
Publisher: Department of Trade and Industry
Fuel gas derived from coal can contain various impurities such as dust and alkali salts, which can deposit on the blades of gas turbines used in cleaner coal systems and lead to increased turbine degradation. It is important to be able to estimate these deposition rates in order to assess different systems.
This project is aimed at:
Many cleaner coal technologies, including the various IGCC and ABGC systems derive their inherently high efficiency by coupling a gasification process with a gas turbine combined cycle unit. The coal is converted into a fuel gas that is then used to fire the combined cycle unit. Gas turbines are designed to operate on clean gaseous fuels such as natural gas, whereas the fuel gas derived from coal will contain various impurities such as dust (ash) and also alkali salts. These can cause deposit build-up, erosion and/or corrosion of the gas turbine blades, leading in turn to increased operating costs, both in terms of replacement blades and the associated down times, and reduced efficiency. Conventional IGCC's can clean the fuel gas to very pure levels using low temperature processes. The ABGC, and second generation IGCC's will use hot gas clean up where the degree of alkali removal and dust capture may not be as efficient. This will improve the efficiency of the plant and lower capital costs, but may have deleterious effects on the gas turbine.
To predict the degree of deposition, erosion and corrosion in the gas turbine, it is first necessary to be able to model (i) the behaviour of small particles within the turbine passages, including their impact on the blades and (ii) the deposition rate of alkali salts on the turbine blades. Current models for deposition are difficult to apply and not always physically accurate. Improved models are needed to provide better estimates of the degradation and determine the degree of cleanliness required in coal-derived fuel gases fed to gas turbines.
A computer program will be developed to calculate the behaviour and deposition of small particles in the three dimensional flow fields typical of gas turbines. This program will incorporate the models for both inertial and turbulent effects, which current models can only consider separately
This profile contains information on the project's:Author(s): Bryden, I.G. and Finlay, L.
Published: 2011
Publisher: ETI
Author(s): Bryden, I.G. and Finlay, L.
Published: 2011
Publisher: ETI
Author(s): Gammer, D.
Published: 2017
Publisher: ETI
Author(s): Atkins
Published: 2015
Publisher: ETI
Author(s): Atkins
Published: 2015
Publisher: ETI
Author(s): ETI
Published: 2014
Publisher: ETI
Author(s): Middleton, M.
Published: 2016
Publisher: ETI
Author(s): Skea, J. and Infield, D.
Published: 2007
Publisher: UKERC
The following submission is preceded by a tabled summary of the current state of energy research and development and deployment in the UK, technology by technology. This is used as the basis for commentary on the technology potential of:
UKERC offers its views on the research funding landscape. Recommendations are highlighted in bold.
Author(s): Decision Analysis Services Ltd
Published: 2016
Publisher: ETI
The schedule for UK FOAK deployment operations would depend upon the associated assumptions. Such options may include:
Author(s): Decision Analysis Services Ltd
Published: 2016
Publisher: ETI
Author(s): ETI
Published: 2015
Publisher: ETI
Author(s): Decision Analysis Services Ltd
Published: 2016
Publisher: ETI
Author(s): Decision Analysis Services Ltd
Published: 2016
Publisher: ETI
Author(s): Middleton, M.
Published: 2017
Publisher: ETI
Author(s): ETI
Published: 2015
Publisher: ETI
Author(s): Hare, P. and Murray, S.
Published: 2014
Publisher: ETI
Author(s): Robinson, L.
Published: 2014
Publisher: ETI
Author(s): Bonser, E. and Lowe, R.
Published: 2014
Publisher: ETI
Author(s): Middleton, M.
Published: 2017
Publisher: ETI
Author(s): Friggens, S., Bell, P. Aufrance, D., Beaumont, R., Cook, D., Kaufmann, C. and Ashley, R.
Published: 2016
Publisher: ETI
Author(s): Firggens, S., Doyle, G., Scott, I. Ashley, R., Dodd, D. and Goodfellow, M.
Published: 2015
Publisher: ETI
Author(s): Friggens, S.
Published: 2015
Publisher: ETI
Author(s): Mott MacDonald
Published: 2014
Publisher: ETI
Author(s): ETI
Published: 2014
Publisher: ETI
Author(s): Friggens, S., Ashley, R., Bell, P. and Aufranc, D.
Published: 2016
Publisher: ETI
Author(s): Norris,D.P., Tabberer, R.J., Dimou, E. & Zhang, N.
Published: 2004
Publisher: Department of Trade and Industry
Clean power technologies have been developed to achieve high efficiencies and low emissions due to stringent environmental regulations. The obvious benefits of clean technologies were adequate while the power market was relatively stable and the plant could operate in base-load condition. However, in the current liberalised power market, electricity prices fluctuate, and thus the operational flexibility plays an important role in the plant profitability.
Powergen and UMIST (Department of Process Integration) have collaborated in a project to develop a means of ascribing a financial value to the operational flexibility (start-up times, ramp rates, minimum stable generation etc) of generating units. The project was partly funded through Powergen (£55k) and partly through support from the DTI's Clean Coal Technology Programme (£50k). This report summarises the Ph.D. study undertaken and presents the results and conclusions.
The basic purpose is to investigate the operational flexibility for power plants generating using coal or heavy fuel oil, in particular looking at Integrated Gasification Combined Cycle plants (IGCCs). The operational flexibility is defined as the ability of the plant to change its operation to respond to the fluctuating electricity prices. The profit that a plant makes is then compared to the profit of a perfectly flexible plant (i.e. instantaneous start-up and shutdown times) to give the cost of inflexibility (Operational Inflexibility Cost (OIC)).
Of the plants studied, the fully integrated IGCC has the best overall thermal performance. The higher the fuel price, the more beneficial it is to operate the IGCC compared with PF plant. In terms of the degree of integration, the fully integrated IGCC has better performance rather than the non-integrated and the partially integrated IGCC plant. The calculated operational inflexibility costs ranged between 0 (for base load operation) and about £2.5M p.a. (for about 55% utilisation) on a 250MW unit.
The overall profitability (excluding fixed costs and capital cost payback) is more dependent on the base capability of the plant than its flexibility. The higher the efficiency of the plant, the less relevant operational flexibility becomes, since high efficiency plant will run base load more often and for longer than lower efficiency plant (if all other factors are equal, such as fuel price, etc). The higher efficiencies of highly integrated IGCCs can offset the cost associated with the longer start up times of the gasifier, due to the increased likelihood of base load running).
This report is divided into the following sections:Author(s): Biomass Engineering Ltd
Published: 2006
Publisher: Department of Trade and Industry
Biomass Engineering Ltd. have demonstrated that their downdraft gasification technology is capable of producing very low tar levels in the producer gas, as independently measured, and have four gasifiers in operation. Developments in the gasifier configuration have led to a very low tar gas, allowing a simplified hot has filtration system to be used. Recent independent analysis of the "tars" from the Mossborough Hall farm gasifier at Rainford, NW England has shown that over 80wt% of the condensable organics in the gas are benzene, toluene, xylene and naphthalene and that problematic tar components in the gas were less than 20 mg/Nm3 under prolonged operation. The gasification technology of Biomass Engineering Ltd. is therefore close to a warrantable commercial reality.
Biomass Engineering Limited has succeeded in developing a downdraft gasifier capable of producing a very low tar, low particulate gas of consistent high calorific value (> 5 MJ/Nm3 for wood feedstocks). However, with the development of a technology capable of handling a well-defined wood, there is a requirement to assess the possibility of using other non-standard fuels, especially as these are more readily available in some locations and where other disposal and transportation options are not economical. To this end this work was concerned with testing a variety of fuels in an existing 80 kg/h (80 kWe) gasification system and measuring a range of process emissions and assess whether they could possibly be used in a downdraft gasifier for gas production for use in a boiler or engine. The fuels used were: dried papermill sludge (briquetted), Dried leather wastes (briquetted), palletwood wastes (and some demolition wood), medium density fibreboard (MDF), panel board (and other chipped pallets), pine/bark mixed waste strippings and renewable biomass fuel (RBF) produced form the organic fraction of MSW.
The Biomass Engineering Ltd. technology is a throated downdraft gasifier and it can be operated using different gas cleaning systems, including cyclones for dust removal, hot gas filter for very high dust capture efficiencies (>99wt%) on low tar gases and a wet scrubbing system for contaminated (volatile metals) and high tar gases. Wastes with high ash contents are more prone to high levels of tar formation. Tests of over 60 hours on each fuel were carried out, except for the RBF, of which there was only a limited quantity and of highly variable quality, which caused various processing difficulties.
Tests on the fuels showed that the high ash feedstocks (>15wt%, RBF and papermill sludge) were problematical in gasifier operation and not unexpectedly gave a producer gas with low heating values in the range of 1-3 MJ/Nm3. The buffings dust, pine/bark mix and the palletwood could be satisfactorily gasified to give a has with a good lower heating value of 4-5 MJ/Nm3. This is the expected value for low ash feedstocks and low tar levels in the gas. Extensive analyses of the feedstocks, the by-products chars and ashes, the producer gas and some of the condensates were made. The RBF fuel was prone to clinker formation on the grate possibly by the formation of low melting eutectic of SiO2 and CaO (or a derivative). The chars exhibited high carbon conversions of typically over 85wt%.
This report contains an executive summary, and is divided into the following sections:Author(s): Middleton, M.
Published: 2018
Publisher: ETI
Author(s): Middleton, M.
Published: 2017
Publisher: ETI
Author(s): SNC-Lavalin UK Limited
Published: 2017
Publisher: ETI
Author(s): SNC-Lavalin UK Limited
Published: 2016
Publisher: ETI
Author(s): DTI
Published: 2005
Publisher: Department of Trade and Industry
The overall aim of this project is to investigate and develop an integrated, multi-pollutant control approach that targets major reductions in NOX and mercury emissions from coal-fired plant. The specific objectives of the project are:
Increasing environmental concerns regarding the use of pulverised coal for power generation continue to drive legislation that limits the emissions of pollutant gases to the atmosphere. The current European Union Large Combustion Plant Directive calls for significant reductions in NOX, SO2 and particulate emissions from coal-fired power plant over the next few years. Primary NOX control measures such as low NOX burners and air staging and secondary (post-combustion) NOX control measures such as NOxStarTM or SCR, in combination, should provide the potential for significantly higher overall NOX reductions to meet the most stringent emission limits in a more cost-effective manner than a stand-alone technology for the same level of NOX control.
This profile contains information on the project's:Author(s): collated and edited by Henry Jeffrey and Shovana Talukda
Published: 2020
Publisher: University of Edinburgh
Author(s): Policy and Innovation Research Group, University of Edinburgh. Ed H. Jeffrey
Published: 2021
Publisher: University of Edinburgh
Author(s): Policy and Innovation Research Group, University of Edinburgh. Ed H. Jeffrey
Published: 2022
Publisher: University of Edinburgh
Author(s): Minchener, A.
Published: 2012
Publisher: UKERC
This UKERC Research Landscape provides an overview of the competencies and publicly funded activities in coal combustion research, development and demonstration (RD&D) in the UK. It covers the main funding streams, research providers, infrastructure, networks and UK participation in international activities.
UKERC ENERGY RESEARCH LANDSCAPE: COAL COMBUSTION
Author(s): Wright, L.C. and Younger, P.
Published: 2012
Publisher: UKERC
This UKERC Research Landscape provides an overview of the competencies and publicly funded activities ingeothermal energy - research, development and demonstration (RD&D) in the UK. It covers the main funding streams, research providers, infrastructure, networks and UK participation in international activities.
UKERC ENERGY RESEARCH LANDSCAPE: GEOTHERMAL ENERGY
Author(s): Aggidis, G.
Published: 2013
Publisher: UKERC
This UKERC Research Landscape provides an overview of the competencies and publicly funded activities in hydropower research, development and demonstration (RD&D) in the UK. It covers the main funding streams, research providers, infrastructure, networks and UK participation in international activities.
UKERC ENERGY RESEARCH LANDSCAPE: HYDROPOWER
Author(s): Finlay, L., Jay, B. and Jeffrey, H.
Published: 2012
Publisher: UKERC
This UKERC Research Landscape provides an overview of the competencies and publicly funded activities in marine renewable energy research, development and demonstration (RD&D) in the UK. It covers the main funding streams, research providers, infrastructure, networks and UK participation in international activities.
UKERC ENERGY RESEARCH LANDSCAPE: MARINE RENEWABLE ENERGY
Author(s): Howarth, P.J.A. and Stonell, D.
Published: 2013
Publisher: UKERC
This UKERC Research Landscape provides an overview of the competencies and publicly funded activities in nuclear fission research, development and demonstration (RD&D) in the UK. It covers the main funding streams, research providers, infrastructure, networks and UK participation in international activities.
UKERC ENERGY RESEARCH LANDSCAPE: NUCLEAR FISSION
Author(s): Warrick, C., O'Brien, M., Ward, D., Nelson, C. and Edwards, C.
Published: 2013
Publisher: UKERC
This UKERC Research Landscape provides an overview of the competencies and publicly funded activities innuclear fusion - research, development and demonstration (RD&D) in the UK. It covers the main funding streams, research providers, infrastructure, networks and UK participation in international activities.
UKERC ENERGY RESEARCH LANDSCAPE: NUCLEAR FUSION
Author(s): Irvine, S.J.C.
Published: 2013
Publisher: UKERC
This UKERC Research Landscape provides an overview of the competencies and publicly funded activities in solar energy research, development and demonstration (RD&D) in the UK. It covers the main funding streams, research providers, infrastructure, networks and UK participation in international activities.
UKERC ENERGY RESEARCH LANDSCAPE: SOLAR ENERGY
Author(s): Halliday, J.A. and Ruddell, A.J.
Published: 2013
Publisher: UKERC
This UKERC Research Landscape provides an overview of the competencies and publicly funded activities in wind energy research, development and demonstration (RD&D) in the UK. It covers the main funding streams, research providers, infrastructure, networks and UK participation in international activities.
UKERC ENERGY RESEARCH LANDSCAPE: WIND ENERGY
Author(s): Breen, R.
Published: 2012
Publisher: UKERC
This UKERC Research Landscape provides an overview of the competencies and publicly funded activities in oil and gas research, development and demonstration (RD&D) in the UK. It covers the main funding streams, research providers, infrastructure, networks and UK participation in international activities.
UKERC ENERGY RESEARCH LANDSCAPE: OIL AND GAS
Author(s): Mueller, M. and Jeffrey, H.
Published: 2008
Publisher: UKERC
This document is a technology roadmap: it provides a guide for mobilising the wave and tidal energy community in the UK down a deployment pathway towards a target of achieving 2GW installed capacity by 2020.
The roadmap is aimed at providing a focused and coherent approach to technology development in the marine sector, whilst taking into account the needs of other stakeholders. The successful implementation of the technology roadmap depends upon a number of complex interactions between commercial, political and technical aspects.
Although this roadmap is technically focused it also considers policy, environmental and commercialisation aspects of the marine energy sector, in order to display and put in context these wider influences.
The roadmap is aimed at technology developers, project developers, policy makers, government bodies, investors (public and private)
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