The Impact of thermostatic expansion valve heating on the performance of air-source heat pumps in heating mode

被引：11
|
作者：
Gao, Zhiming [1 ]
机构：
[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
来源：
ENERGY CONVERSION AND MANAGEMENT | 2010年 / 51卷 / 04期
关键词：
Heat pump; Energy saving; Thermal comfort; Thermostatic expansion valve; PRESSURE-DROP;
D O I：
10.1016/j.enconman.2009.10.030
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This paper discusses the strategy of improving the efficiency of air-source heat pumps by adding a small amount of heat to the sensor of the thermostatic expansion valve (TXV). TXV heating retards the closing of the valve and boosts energy efficiency in heating mode. Test results demonstrate that appropriate TXV heating achieves an improvement in coefficient of performance (COP) and thermal comfort. The required heating power is no more than 40 W and the additional equipment cost is less than $20 at manufacturer cost (2006). Thus, the strategy of TXV heating is both technologically practical and low cost. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：732 / 739
页数：8
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