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现行 NT-87-05-4
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Steady-State Refrigerant Flow and Airflow Control Experiments for a Continuously Variable Speed Air-to-Air Heat Pump 连续变速空气-空气热泵稳态制冷剂流量和气流控制实验
在实验室对一台标称容量为23/4吨(9.7千瓦)的连续变速、空气-空气分流系统住宅热泵进行了测试。在稳态加热和冷却模式运行期间,测量了性能系数(COP)、系统容量和部件效率。在离散压缩机转速下,改变室内鼓风机转速和冷凝器出口处的制冷剂过冷度,以确定受住宅舒适性要求约束的最佳COP。 加热和冷却模式测试结果表明,与毛细管节流阀相比,可变面积节流阀的COP提高了10%。改进了制冷剂流量的控制,降低了室内鼓风机的速度,改善了湿度控制。与毛细管流量控制的结果相比,在15Hz压缩机转速下,显热比从0.95降至0.77。单位:双引文:研讨会,ASHRAE交易,1987年,第93卷,第。田纳西州纳什维尔2号
A continuously variable speed, air-to-air split-system residential heat pump of nominal 2 3/4-ton (9.7-kW) capacity was instrumented and tested in the laboratory. The coefficient of performance (COP), capacity of the system, and component efficiencies were measured during steady-state heating- and cooling-mode operation. The indoor blower speed and the refrigerant subcooling at the condenser exit were varied at discrete compressor speeds to determine the best COP as constrained by residential comfort requirements.Heating- and cooling-mode test results showed a 10% improvement in COP for operation with a variable area throttle as compared with a capillary tube throttle. Improved control of refrigerant flow and reduction of the indoor blower speed improved humidity control. As compared with results for capillary tube flow control, the sensible heat ratio was reduced from 0.95 to 0.77 at 15-Hz compressor speed.Units: Dual
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