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Projects: Projects for Investigator
Reference Number NIA_NGGD0023
Title MEG Improvement Phase 2B
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 February 2014
End Date 01 December 2014
Duration 10 months
Total Grant Value £259,600
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_NGGD0023
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 2B, is to produce the conceptual design of a TouchSpray MEG Fogger, produce the test capability, and understand the droplet size dynamics in the pipe flow. The success of this project will be production of the prototype design TouchSpray MEG Fogger, production of the test capability, and the modeling and testing of MEG droplet size dynamics in air carrying pipes so as to understand what droplet size is required for a meg fogging system.
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 over 300, with approx 60% extra planned to still be commissioned by 2021. This project will provide an opportunity for National Grid to develop an alternative to the Norgren heads and vaporiser unit control panels, both of which are currently not in production. This project will focus on developing equipment to the prototype stage and understanding the droplet dynamics in the pipe flow. Within the scope of this work is the construction of a TTP test capability.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