Studies of a Heat Pump Using Water and Air Heat Sources in Parallel.

Energy and exergy analysis of fossil plant and heat pump building heating system at two different dead-state temperatures

“…3. Relation between COP and the temperature at the evaporator using air or water as a heat source [21]. the same, which can also be seen from this figure.…”

“…Storage is not considered in this analysis. A characteristics curve from [21] is used in this study. Brief descriptions of these curves are presented herein.…”