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CHAPTER 2: LITERATURE STUDY 24 specific heat and pseudo-critical temperature is depicted. At different temperatures it could be seen that the specific heat (Cp) changes drastically as the temperature rises. The temperature at which the specific heat reaches a maximum is called the pseudo-critical temperature and the higher the pressure is, the higher the pseudo critical temperature. The peak of the CO2 specific heat also decreases as the pressure rises (Yang et al., 2006). 10 5 Figure 2.12: Isobaric specific heat for CO2 (Kim et aL, 2003). --14MPa --- 12MPa _10Mpa ~~~ 8Mpa -~. 4MPa O~~_-L_J- __~~_~--~--L-~--~--~--~~--~ -2Q o 20 40 60 so tOO 120 T~GJ Should the £-NTU or LMTD-method be used to attain data, one should find out whether the specific heat is constant, because these methods require the specific heat to be constant over the test section (Kim al., 2003). A Techno-Economical Analysis of a CO2 Heat Pump. School ofMechanical Engineering, North-West UniversityPDF Image | CO2 HEAT PUMP Analysis
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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
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