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3 – Theoretical Background and System Analysis Figure 3.16 Illustration of the exergy balance for the entire system. . Σ ∆Etot Integrated CO2 Heat Pump System . EQ-SH Ptot . The different exergy losses for the integrated CO2 heat pump system can also be expressed as relative values by dividing the individual losses by the total exergy loss of the entire system. As an example, the relative exergy loss of the compressor is expressed as: ⎛ ∆E ⎞ & ⎜ C ⎟ (3.15) ∆EC−rel =⎜ & & & & & ⎟⋅100% ⎝∆EE +∆EC +∆EGC +∆EEX +∆ESH ⎠ EQ-DHW EQ-HL . It should be emphazised that the different exergy losses in the integrated CO2 heat pump system are mutually dependent, which means that modifi- cations in one part of the system will effect the absolute and relative exergy losses in other components or sub-systems. 3.2.5.2 Exergy Analysis of the Prototype CO2 Heat Pump Section 7.2, Exergy Analysis of the Prototype CO2 Heat Pump System, presents the results from an exergy analysis of the prototype brine-to- water CO2 heat pump system during operation in the three different operating modes at 33/28 and 40/35oC supply/return temperatures for the space heating system and 60 and 80oC DHW temperature. The analysis includes, among other things, a discussion of the possibilities for efficiency improvements of the prototype CO2 heat pump system. 48PDF Image | Residential CO2 Heat Pump System for Combined
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