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Projects: Projects for Investigator
Reference Number NIA_NGGD0043
Title MEG Fogger Trial Phase 3
Status Completed
Energy Categories Fossil Fuels: Oil Gas and Coal(Oil and Gas, Refining, transport and storage of oil and gas) 100%;
Research Types Applied Research and Development 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Chemistry) 25%;
ENGINEERING AND TECHNOLOGY (Mechanical, Aeronautical and Manufacturing Engineering) 50%;
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Project Contact
No email address given
Cadent Gas
Award Type Network Innovation Allowance
Funding Source Ofgem
Start Date 01 November 2014
End Date 01 May 2016
Duration 18 months
Total Grant Value £710,867
Industrial Sectors Technical Consultancy
Region London
Programme Network Innovation Allowance
Investigators Principal Investigator Project Contact , Cadent Gas (100.000%)
Web Site http://www.smarternetworks.org/project/NIA_NGGD0043
Objectives The overall aim of the MEG Improvement initiative is to design, develop, manufacture, install and commission a TouchSpray MEG Fogging system for use on the National Grid Gas Distribution network, in order to achieve a major improvement in MEG saturation levels across the network. The objective of this project, under Phase 3, is to develop the fogger heads to a prototype standard, review and select MEG saturation measurement for the trial, and define in detail the equipment and trial requirements. The determination the optimum deployment of MEG Fogger heads for use in trialThe recommendation of saturation measurement equipmentA robust concept design and trial specification
Abstract The introduction of dry natural gas in the 1970s caused the yarn in these joints to dry out, creating leakage paths. For many years National Grid has replaced the lost moisture by operating gas conditioning plant, which injects mono-ethylene-glycol (MEG) into the gas stream at selected system source points chosen because of high levels of lead yarn joints downstream. The MEG is adsorbed by the yarn causing it to re-swell and re-seal the leak path. Existing gas conditioning equipment is very old and supplier support for spare parts is increasingly difficult. In addition, the existing technology is difficult to control since the flow of MEG into the system is not matched to demand and the consistency of the fog in terms of drop size means the distance the fog can go in the system is limited. National Grid operates 33000Km of cast and spun iron mains throughout its UK Low Pressure distribution networks. Approximately 8000Km of this iron main material was constructed using lead & yarn joints. The number of active MEG units is approximately 275 with circa 225 planned to still be in commission by 2021. A further 73 potential sites have been identified that may be suitable for MEG injection. This phase of the project will develop the understanding of the MEG deployment method, saturation measurement and define the equipment and trial requirements.Note : Project Documents may be available via the ENA Smarter Networks Portal using the Website link above
Publications (none)
Final Report (none)
Added to Database 10/09/18