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months. The negative energy saving symbolizes greater use of primary energy when compared to the current conventional system in place. Previous studies (Almeida, 2011) have shown that the use of 2-stage compression with intercooling results in greater energy efficiency. 2-stage compression especially increases the potential savings in the summer months. Figure 3-2 shows the potential improvement in the savings when two-stage compression is used in summer months. If the system uses single stage compression in these 4 warmer months, the proposed CO2 heat pump system would utilize 195,958 kWh (- 17.3%) units of energy more than the present system. The use of 2-stage compression in the summer months when the ambient temperature is high reduces the additional energy unit consumption to 80,685 kWh (-7%). Figure 3-2. Potential primary energy savings when single stage compression is compared to 2-stage compression. The results show that the most efficient system will be the one which works as a single-stage compression cycle in the winter months and a two-stage compression cycle with intercooling in the summer months. 27PDF Image | CO2 HEAT PUMPS FOR COMMERCIAL BUILDING APPLICATIONS
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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
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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