| 摘要: |
| 空气源热泵在冬季结霜会对机组的运行产生较大影响。本文实验机组为一台复叠式空气源热泵，室外侧换热器采用带亲水膜的翅片管.在焓差实验室中进行室外温度在-18~6℃区间、相对湿度在70%~90%区间内的实验，研究空气源热泵的翅片管换热器的结霜量。实验结果显示：结霜量随时间增加而增加，并且接近线性关系；室外温度在-3~3℃时的结霜量最高，随着室外温度的下降，结霜量下降；室外湿度对结霜量的影响较大，在70%的相对湿度下，结霜量远小于80%~90%的结霜量；本文根据结霜时间、换热面积和盘管表面温度与空气露点温度与结霜量之间的关系，提出了结霜因子的概念，并得到结霜因子的范围为6.51~10.31kg/(m2?℃?min)，其平均值为8.58kg/(m2?℃?min)。 |
| 关键词: 空气源热泵 翅片管换热器 空气温度 空气湿度 结霜量 |
| DOI： |
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| 基金项目:国家自然科学基金(51208298)资助项目。 |
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| Study of the Frosting Factor Based on Finned-tube Heat Exchanger of Air-source Heat Pump |
| Han Xing,Fan Wei,Chen Jianbo,Chen Qiuhuo,Yao Jingshan |
| (School of Environment &Architecture, University of Shanghai for Science & Technology) |
| Abstract: |
| The frost on the heat exchanger of air-source heat pump has a great influence on the operating performance. The frosting experiment based on a cascade type air-source heat pump water heater is carried out in the enthalpy-difference chamber in this paper, and the outdoor evaporator of the unit is a finned-tube heat exchanger. The experiment is conducted under the conditions that the outdoor temperature is from -18℃ to 6℃ and outdoor relative humidity is from 70% to 90%. Experimental results show that: First of all, the amount of frosting almost changes linearly with the frosting time which is of maximum in the outdoor temperature range of -3~3℃, and the lower outdoor temperature, the more frosting amount; Secondly, the outdoor relative humidity has a great influence on the quantity of frost, and the more humidity, the more frosting quantity; Finally, the frosting factor is proposed based on the relationships of the area and form of evaporator coil, the time of frosting, the difference of the dew point temperature and the temperature on the evaporator coil and the frosting quantity, and is from 6.51 to 10.31kg/(m2?℃?min) with the average value 8.58×10-4 kg/(m2?℃?min). |
| Key words: air-source heat pump finned-tube heat exchanger outdoor temperature outdoor humidity frosting amount |
