Future Energy Networks
201 - 203 of 203 results
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Weld Residual Stress Phase II - Testing
More LessThis project seeks to demonstrate the reductions in weld residual stress assumptions that have been suggested by the Phase I Literature Review project. A test programme will be conducted to measure residual stress in pipelines indicative of those on the gas network, and subject them to hydrostatic pressures as seen in the period correct commissioning tests. These residual stress results will be fed into a Finite Element Analysis (FEA) model to scale up to other sizes and grades representative of the gas network. Residual stress tests will also be performed on extracted ex-service pipework in order to validate the ‘fresh’ pipeline tests and the FEA modelling.
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Welding Residual Stress Measurements and Analysis for Gas Pipelines
More LessThis project concerns the research into welding residual stress values and the effect that they have on the overall pipework repurposing assessment route described in relevant hydrogen standards. Currently, overly conservative values need to be applied for welding residual stresses in any repurposing assessment. This project aims to build evidence on actual and modelled residual stresses seen within the pipelines industries, with a focus on natural gas pipelines. As the welding residual stress is a critical aspect of the fracture mechanics assessment, any improvements which can be gained would have an overall positive impact on the assessment results.
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Wireless Methane Odorant Detector
More LessThis project aims to improve natural gas leak detection for over 3.5 million people with acute smell disorders e.g. anosmia. Traditional methane sensors require high power, limiting placement. The legally required odorant (80% tert-butyl mercaptan and 20% dimethyl sulphide) will continue as the UK transitions to hydrogen or blends, necessitating re-calibration of detectors.
Our solution is an odorant-based gas detector using a custom ultra-low power electrochemical sensor to measure TBM. These sensors operate for over 10 years on a sealed lithium-ion battery, detecting TBM from 20-30ppb (below our smell threshold) up to 1,500ppb (20% of the Lower Explosion Level), ensuring early warning of gas leaks.
With no natural sources of TBM, false positives are eliminated. The Sensor is ‘hydrogen ready,’ maintaining consistent odorant levels during the transition to hydrogen or blends, accurately notifying of gas leakage without reconfiguration.
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