办公建筑空气源热泵系统变水温实验研究
Experimental study on variable water temperature of air-source heat pump systems in office buildings
摘要：
针对邯郸某办公楼空气源热泵系统冬季供暖定水温运行中存在的房间温度波动幅度大、环境温度低时机组会频繁启停等问题,提出了一种基于供需匹配思想的分时、分阶段变水温控制方法,并进行了实验测试。实验表明:在典型日环境温度0～10 ℃波动范围条件下,变水温控制方法下的空气源热泵在整个供暖季的平均系统性能系数(COP)为3.38,其总能耗相比定水温运行可减少3 306 kW·h。
Abstract：
In response to the problems existing in the constant water temperature operation of the air-source heat pump system of an office building in Handan during the winter heating, such as the room temperature fluctuation being too large, and the equipment frequently starting and stopping when the ambient temperature is low, a time-sharing and stage-based variable water temperature control method based on the matching of supply and demand is proposed. The effectiveness of this method has been tested through experiments in the office building. The experiment shows that under the condition of the ambient temperature fluctuating between 0 ℃ and 10 ℃ on typical days, the average system coefficient of performance (COP) of the air-source heat pump under the variable water temperature control method throughout the heating season is 3.38, and the total energy consumption can be reduced by 3 306 kWh compared with the constant water temperature operation.
Keywords:office building; air-source heat pump; variable water temperature; PLC control; coefficient of performance