CO2 heat pumps for the Swedish market

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CO2 heat pumps for the Swedish market ( co2-heat-pumps-swedish-market )

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At the beginning of the tests, a brief study was made to show how the stratification will develop in a newly filled tank by measuring the water temperature distribution in the tank. Two cases with electric heater at “on-mode” and “off-mode”, respectively, were tested. Before each test, the tank is totally emptied and filled with cold city water. Testing results are shown in Figures 27 and 28 respectively. tank charging with no electric heater at -2°C - 2008-05-01 70 12 65 11 60 10 55 9 50 8 45 7 40 6 T5 temperature [°C] Flow [m3/h]; power [kW] 35 5 30 4 T_top T1 T2 T3 T4 T6 T_rad_supply water gas cooler 25 3 in water gas cooler 20 2 out 15 1 10 0 0 900 1800 2700 3600 4500 5400 6300 7200 8100 9000 9900 10800 11700 time [s] Figure 27. Heating up of a cold tank with electric heater in “off-mode” compr. Power flow scaled 10 [m3/h] 35

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CO2 heat pumps for the Swedish market

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