联合室内排风能量法的空气源热泵的结霜情况分析

Analysis on the Frost Characteristic for Air Source Heat Pump Based on the Combined Indoor Air Exhaust Energy Method

提出了一种联合室内排风能量法的空气源热泵系统,即将室内排风与环境空气混合,然后再通过空气源热泵的室外换热。该方法既可以缓解空气源热泵系统结霜问题,又为室内热排风热量回收提供新途径。利用全国18个城市的气象数据对该方法的适用性进行分析:室内排风状态为16℃/30%和24℃/60%时,空气源热泵室外机结霜概率分别减少0%~36.17%和10.97%~68.17%。并依据结霜改善情况将该方法的适用性分为4种:不适用、可以采用、建议采用和应当采用。其中,北京、济南、太原、兰州和石家庄5个城市属于应当采用该方法的地区。

The combined indoor air exhaust energy method in air source heat pump system was proposed,i. e. the outdoor air mixes with the indoor exhausted air before heat transfer with outdoor unit of the heat pump system. This method is not just a novel method for anti- frosting of air source heat pump,but also a new way for recovering the waste heat of the indoor exhausted gas. To analyze the applicability of this new method,meteorological data of 18 cities in China are selected,and the frosting rates are reduced by 0% ~ 36. 17% and 10. 97% ~ 68. 17% with the exhausted gas temperature / relative humidity are 16℃ /30% and24℃ /60%,respectively. In addition,the applicability in these cities is divided into 4 ranks,‘Not applicable',‘Applicable',‘Suggest applicable'and‘Must applicable'. And,Beijing,Ji'nan,Taiyuan,Lanzhou and Shijiazhuang five cities belong to the‘Must applicable'region in which should adopt the method.