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Residential CO2 Heat Pump System for Combined

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Residential CO2 Heat Pump System for Combined ( residential-co2-heat-pump-system-combined )

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4 – Test Rig Design and Experimental Methods Start Stop Figure 4.33 Movement of the insulating plate during the tapping mode. The average water flow rate through the diffuser was calculated by mea- suring the position of the plate every 30 seconds. Figure 4.34 shows the relationship between the velocity of the plate and the water flow rate. Figure 4.34 The relationship between the velocity of the movable insu- lating plate and the water flow rate through the diffuser. Tapping Mode – Closed Tank The tank was filled with city water and dyed hot water as described in the previous section. The polycarbonate cover and the metal plate were mounted by using the lifting device, and the six steel rods were tightened. During testing, city water was fed through the diffuser, and the hot water above the insulating plate was drained through the outlet hose at the top of the tank (drain 2). Due to unwanted deformation of the tank walls (oval shape), the maximum water flow rate was limited to about 20 l/min. Dyed hot water at 55OC City water at 5OC Insulating plate 16 12 8 4 0 0 5 10 15 20 25 30 Water Flow Rate [litres/min] 108 Plate Velocity [cm/min]

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Residential CO2 Heat Pump System for Combined

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