Characteristics of an air source heat pump with novel photoelectric sensors during periodic frost–defrost cycles
Characteristics of an air source heat pump with novel photoelectric sensors during periodic frost–defrost cycles
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DOI：
10.1016/j.applthermaleng.2012.06.019
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发表时间：
2013-01
影响因子：
6.4
通讯作者：
Wen Wang;Jing Xiao;Y. Feng;Qingci Guo;Lincheng Wang
中科院分区：
文献类型：
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作者：
Wen Wang;Jing Xiao;Y. Feng;Qingci Guo;Lincheng Wang
为了避免除霜不良现象，本文开发并提出了一种创新的光电传感器。它被称为“环管光电传感器”(TEPS)。实验是在标准结霜条件下的受控环境室中进行的。 4 种不同型号的 10 个 TEPS 在标称加热能力为 60 kW 的商用尺寸空气源热泵上进行了测试。在 9 个周期性霜-除霜循环期间对空气源热泵的特性以及 TEPS 的性能进行了研究。与制造商配备的原始除霜控制策略相比，所提出的TEPS传感器揭示了其精确控制除霜过程的潜在能力。实验结果表明，在实验条件下，TEPS可以将化霜间隔从28.8min大幅延长至52min，并且化霜循环次数可以从9次减少到5次。发现性能提高了6％的加热效率和5％的COP。
To avoid mal-defrost phenomenon, an innovative photoelectric sensor is developed and presented in this paper. It is referred to as “Tube Encircled Photoelectric Sensor” (TEPS). Experiments are carried out in a controlled environmental chamber under standard frosting conditions. Ten TEPSs in 4 different models are tested on a commercial size air source heat pump with the nominal heating capacity of 60 kW. The characteristics of the air source heat pump, together with the performance of the TEPSs are investigated during 9 periodic frost–defrost cycles. Compared with the original defrosting control strategy equipped by the manufacturer, the proposed TEPS sensor reveals its potential ability to accurately control the defrosting process. Experimental results demonstrate that TEPSs can substantially prolong defrost intervals from 28.8min to 52min under the experimental conditions, and the number of defrost cycles can be reduced from 9 to 5. The performance improvement is found to be 6% to the heating efficiency, and 5% to the COP.