Modelling of Heat Energy Recovery Potential form Underground Railways with Nearby Vertical Ground Heat Exchangers in an Urban Environment
Revesz, A, Chaer, I, Thompson, J, Mavroulidou, M, Gunn, M and Graeme, M (2018). Modelling of Heat Energy Recovery Potential form Underground Railways with Nearby Vertical Ground Heat Exchangers in an Urban Environment. Applied Thermal Engineering.
|Authors||Revesz, A, Chaer, I, Thompson, J, Mavroulidou, M, Gunn, M and Graeme, M|
Ground source heat pumps (GSHPs) in urban environments can take advantage of surplus ground heat energy generated by subterranean infrastructures such as underground railways (URs). This paper describes seminal work in this area and a novel 3D numerical investigation into the heat energy recovery from URs with nearby vertical ground heat exchangers (GHEs). The investigation uses the London Underground (LU) as a case study but its results are generic worldwide. The investigation included a number of studies considering different geometrical configurations of the railway tunnels and the nearby GHE array, and the impact of that variation on the GHEs heat extraction rates. The results showed that heat extraction rates of GSHPs installed near UR tunnels can be significantly improved by up to ~ 43%. This will enhance overall GSHP system efficiencies, resulting in substantial savings in both operational costs and carbon emissions. In addition, the outcomes were used to develop a relationship which allows approximating the GHEs heat extraction improvements due to the nearby tunnel(s) heat load(s). This could give guidance to engineers working in fields where thermal interactions between URs and nearby GHEs arise.
|Keywords||Modelling, Underground Railways, Ground Source Heat Pumps, Vertical Ground Heat Exchangers, Secondary Heat, London Underground, London, UK; 0913 Mechanical Engineering; 0915 Interdisciplinary Engineering; Energy|
|Journal||Applied Thermal Engineering|
|Digital Object Identifier (DOI)||doi:10.1016/j.applthermaleng.2018.10.118|
|01 Nov 2018|
|Publication process dates|
|Deposited||25 Oct 2018|
|Accepted||25 Oct 2018|
|Accepted author manuscript|
CC BY-NC-ND 4.0
Accepted author manuscript
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