Design of Heat Exchangers for Heat Pump Applications
Fossa, Marco (editor)
Priarone, Antonella (editor)
Heat pumps (HPs) allow for providing heat without direct combustion, in both civil and industrial applications. They are very efficient systems that, by exploiting electrical energy, greatly reduce local environmental pollution and CO2 global emissions. The fact that electricity is a partially renewable resource and because the coefficient of performance (COP) can be as high as four or more, means that HPs can be nearly carbon neutral for a full sustainable future. The proper selection of the heat source and the correct design of the heat exchangers is crucial for attaining high HP efficiencies. Heat exchangers (also in terms of HP control strategies) are hence one of the main elements of HPs, and improving their performance enhances the effectiveness of the whole system. Both the heat transfer and pressure drop have to be taken into account for the correct sizing, especially in the case of mini- and micro-geometries, for which traditional models and correlations can not be applied. New models and measurements are required for best HPs system design, including optimization strategies for energy exploitation, temperature control, and mechanical reliability. Thus, a multidisciplinary approach of the analysis is requested and become the future challenge.
Keywordsadsorption; cooling technology; chiller; heat exchanger; waste heat utilization; CFD; heat pumps; EnergyPlus; buildings; exergy transfer performance; nanofluids; marine seawater source; heat pump; graphene nanoparticles; ground-to-air heat exchangers; GAHE; experimental results; preheating and precooling for HVAC; energy saving for HVAC; models for calculating the thermal efficiency of ground-to-air heat exchangers; shallow geothermal system; dual source heat pump; phase change materials; numerical simulations; tube heat exchanger with plate-fins; air-side Nusselt number; various heat transfer equations in each tube row; CFD modelling; empirical heat transfer equation; ground coupled heat pumps; borehole heat exchangers; distributed temperature response test; grouting material; hydration heat release; ground heat exchanger; whole-building energy simulation; ground source heat pump; g-Function
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Publication date and placeBasel, Switzerland, 2020
History of engineering & technology