Retrofitting a Fifth Generation District Heating and Cooling Network for Heating and Cooling in a UK Hospital Campus

Journal article

Lalor, J. and Gillich, A. (2024). Retrofitting a Fifth Generation District Heating and Cooling Network for Heating and Cooling in a UK Hospital Campus. Buildings. 14 (8), p. 2442. https://doi.org/10.3390/buildings14082442

Publication dates
Authors	Lalor, J. and Gillich, A.
Abstract	There is an increasingly rich literature on the decarbonisation of heat and the evolution of heat networks. This paper investigates whether a novel fifth Generation District Heating and Cooling Network (5GDHC) could be retrofitted to an existing National Health Service (NHS) hospital campus for the purpose of heating and cooling. The building load was simulated and input into a custom-written script to carry out a series of parametric studies and optimise design options. The model was calibrated against site data available from hospital facilities management. The research found that it is feasible to use a 5GDHC consisting of a large single mass of water to utilise inter-seasonal thermal storage. A natural water resource such as an aquifer was not required. The model tested sizing options and found that larger thermal storage, heat pumps and chillers reduce operating costs and improve flexibility. The paper closes with a discussion of the practical factors in retrofitting 5GDHC networks to a densely occupied and highly constrained campus environment. The findings are novel in further describing the circumstances for which 5GDHC networks are suitable.
Keywords	heat network; 5GDHC; retrofit; decarbonisation of heat
Year	2024
Journal	Buildings
Journal citation	14 (8), p. 2442
Publisher	MDPI
ISSN	2075-5309
Digital Object Identifier (DOI)	https://doi.org/10.3390/buildings14082442
Web address (URL)	https://www.mdpi.com/2075-5309/14/8/2442
Online	07 Aug 2024
Publication process dates
Accepted	26 Jul 2024
Deposited	19 Aug 2024
Publisher's version	buildings-14-02442-v2.pdf License CC BY 4.0 File Access Level Open
License	https://creativecommons.org/licenses/by/4.0/

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