复叠式空气源热泵双螺旋盘管蓄热器蓄放热特性实验研究

Experimental Study on Characteristics of Spiral Tube Heat Storage Tank for CASHP

本文在传统的复叠式空气源热泵中增加一个双螺旋盘管形式的蓄热器,并测量蓄热器内不同位置水温及蓄热器进出口制冷剂温度变化。研究了当室内侧模拟工况干球温度为22℃±0.1℃,相对湿度为50%±3%,室外侧模拟工况干球温度为-12℃±0.1℃时,蓄热器在蓄热模式、间断制热蓄能除霜模式、不间断制热蓄能除霜模式下的蓄放热特性。结果表明:该蓄热器有良好的蓄热能力及在不同低位热源条件下的放热能力。在间断和不间断制热蓄能除霜过程中,蓄热器的释热量分别为1 642.7 k J和1 892.4 k J,可以满足除霜的要求和部分室内供热需求。

The performance of a spiral-tube heat storage tank added to a traditional cascade air source heat pump was experimentally in- vestigated. The water temperature of different measuring points and the refrigerant temperature at the inlet and outlet of the heat storage tank were measured. The dry bulb temperature for indoor simulated conditions was 22 ℃ ± 0. 1 ℃, the relative humidity was 50% ± 3% , and the dry bulb temperature for outdoor simulated conditions was - 12 ℃ ± 0. 1℃. The characteristics of the heat storage tank in the thermal storage mode, thermal storage defrosting mode with intermittent heating, and thermal storage defrosting mode with continuous heating were experimentally studied. The experiment results indicated that the spiral-tube heat storage tank was effective for heat storage and heat release for low-grade heat sources at different temperatures. During a thermal storage defrosting mode with intermittent heating, and thermal storage defrosting mode with continuous heating, the amounts of heat release in the heat storage tank were 1642. 7 kJ and 1892.4 k J, respectively. These results can meet the requirements for defrosting and for part of indoor heating.