CO2 HEAT PUMP Analysis

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CO2 HEAT PUMP Analysis ( co2-heat-pump-analysis )

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-------~~ .------.------~-­ CHAPTER 4: C01vlPARlSONBETV,rEENR-22AND CO2 SYSTEM 96 therefore the demand for hot water is the same and also because the systems are closely matched as far as their capacities are concerned. It can be seen that the bottom temperatures of storage vessel 2 are at 30°C for all three systems. This is because the thermostat is set at this temperature to ensure that the heat pump does not have an inlet water temperature of above 30°C. Thus when the bottom thermostat senses a temperature of 30°C the system will turn of and has now reached the favourable temperature. Both storage tanks are considered to be at the desired temperature. Storage vessel 1 has a temperature of up to 60°C and therefore the hotel and its recipients will receive hot water at these temperatures, heat losses in the pipe network neglected. From the top temperatures in storage vessel 1 of all three systems it can be seen that the systems are all capable of keeping up with the hot water demand under the summer conditions. There is a bigger deviation in the bottom temperatures of storage vessel 2 because when the system is in operation cold municipal water enters at this point. A Techno-Economical Analysis of a CO2 Heat Pump. School of Mechanical Engineering, North-West University

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