Low Temperature Heat Recovery and Distribution Network Technologies
LoT-NET is a six-year programme grant awarded to Warwick in 2018 to investigate how waste heat can be recovered, used and incorporated in smart, thermal and electrical energy systems. We aim to develop low cost, low loss, flexible heat distribution networks that integrate intermittent renewable supplies, waste heat outputs, low-carbon heat emitters, multi-scale thermal storage and smart thermal energy transformers to provide affordable, secure and sustainable energy to UK consumers and businesses whilst being compatible with future electricity networks.
Lot-NET considers how waste heat streams from industrial or other sources feeding into low temperature heat networks can combine with optimal heat pump and thermal storage technologies to meet the heating and cooling needs of UK buildings and industrial processes. Heating and cooling produces more than one third of the UK's CO2 emissions and represent about 50% of overall energy demand. BEIS have concluded that heat networks could supply up to 20% of building heat demand by 2050. Heat networks have previously used high temperature hot water to serve buildings and processes but now 4th generation networks seek to use much lower temperatures to make more sources available and reduce losses. Lot-NET will go further by integrating low temperature (LT) networks with heat pump technologies and thermal storage to maximise waste and ambient heat utilisation.
Heat source availability is often time dependant. Lot-NET will overcome the challenges of time variation and how to apply smart control and implementation strategies. Thermal storage will be incorporated to reduce the peak loads on electricity networks. The wider use of LT heat networks will require appropriate regulation to support both businesses and customers and Lot-NET will both need to inform and be aware of such regulatory changes. The barrier of initial financial investment is supported by BEIS HNIP but the commercial aspects are still crucial to implementation.
The aim of LoT-NET is to prove a cost-effective near-zero emissions solution for heating and cooling that realises the huge potential of waste heat and renewable energies by utilising a combination of a low-cost low-loss flexible heat distribution network together with novel input, output and storage technologies.
Project partners: 3D Technical Design Ltd Asda Causeway Coast & Glens, Dept for Bus, Energy & Ind Strat (BEIS), Emerson Climate Technologies GmbH, FutureBay, Greater London Authority (GLA), Islington Council, London Underground Ltd, REHAU Ltd, Spirax sarco, SWEP International