I am dealing with utilising waste heat from industry to supply district heating through use of large-scale heat pump(s) and curious to if the building where the HP(s) would be stored require insulation.
Heat pumps can be designed to work at any reasonable ambient/heat rejection temperature, but no one heat pump can operate optimally over a broad range of ambient or heat rejection temperatures. Insulation or any other measures that maintain the heat rejection temperatures reasonably constant and near the optimal are beneficial, but if these are very large systems, the local air temperature in the building is probably not nearly as important as sources of heat and heat rejection that remain at near their optimal values.
This depends on the outdoor temperature range and the possibility of using water as a heat transfer fluid from the heat pump to the building.
Optimum utilization of the available energy is vital to eliminate waste heat and address other environmental issues. I have been studied the Design of a heat recovery unit using exhaust gases for energy savings in an absorption air conditioning unit.
You can find the paper at the following link:
Article Design of a heat recovery unit using exhaust gases for energ...
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