Heat networks can be an effective way of supplying low carbon heat to buildings. Current UK systems are largely based on fossil fuel Combined Heat and Power (CHP). Such systems may likely be unacceptable in the long term, if the levels of decarbonization visualized in the UK are to be attained. Heat networks are best suited to areas with high heat demand density such as big cities. This paper demonstrates that Underground Railways (UR) could be an attractive year round heat source and presents numerical investigations into the interactions between these systems.
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