Thermal sources and fluid flow |
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| Affiliation: | 1. School of Architecture and Building Engineering, The University, Liverpool, USA;1. State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China;2. School of Environmental Science, Liaoning University, Shenyang, 110036, China |
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| Abstract: | It is shown that if air at a temperature T0 enters a space at T1, its effect on the space is that of a pure heat source of strength, Vs·(T0−T1), (Watts) where V is the volume flow in m3 s−1 amd s is the volumetric specific heat in J m−3 K−1. The flow is usually modelled as the conductance Vs, (W/K), but this is only correct if T0 denotes ambient temperature; if T0 represents the temperature of an enclosed space, the flow must be modelled as a source. Similarly, if a fluid flow is heated or cooled, it is to be modelled a temperature source, possibly together with a conductance. |
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