PDF Publication Title:
Text from PDF Page: 062
3 – Theoretical Background and System Analysis The slope of the CO2 isobar (∂T/∂h)p in the T-h diagram is the inverse of the isobaric specific heat capacity of the CO2, whereas the slope of the process lines for preheating of DHW (A), low-temperature space heating (B) and reheating of DHW (C) are calculated as: (3.6) where m& CO2 and m& W are the mass flow rates for the CO2 and water, respec- tively, and cp is the average specific heat capacity of water at the actual temperature range. The heat rejection process in the tripartite gas cooler can alternatively be displayed in a temperature-heat (T-Q) diagram as illustrated in Figure 3.12 (ref. Appendix A2.4). In the example, the high-side pressure is 9.5 MPa, the supply/return temperatures for the space heating system are 40/35oC, and the inlet city water temperature and set-point temperature for the DHW system are 6.5oC and 70oC, respectively. ∂T ⎛m ⎞ 1 =⎜ &CO2 ⎟⋅ 110 90 70 50 30 10 -10 110 90 70 50 30 10 -10 ∂h m c ⎝&W⎠p A B C CO2 - 9.5 MPa (a-b-c-d) Preheating of DHW Low-temperature space heating Reheating of DHW c C a b d ∆TA A . QSH B . . QDHW-P QDHW-R 012345678 . Heat, Q (kW) Figure 3.12 Illustration of the heat rejection process for a tripartite gas cooler operating in the combined mode. The high-side pressure is 9.5 MPa. The main advantage of the T-Q diagram is that the heating capacities of the three gas cooler units, the evaporator capacity and the compressor power input can be read directly off from the abscissa. 40 Temperature, T (oC)PDF Image | Residential CO2 Heat Pump System for Combined
PDF Search Title:
Residential CO2 Heat Pump System for CombinedOriginal File Name Searched:
20559406.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |