地源吸收式热泵夏季运行方式研究

Operation Modes of Ground Source Absorption Heat Pump in Summer

针对现有的地源吸收式热泵在夏季运行工况时所出现的系统能耗高、空调房间易结露等问题,提出将集中热源驱动的新风溶液除湿机组和地埋管夏季免费供冷相结合,构成集中热源驱动的土壤源温湿度独立控制空调系统。选取北京地区某典型办公房间,以该系统为研究对象,建立各部分的数学模型,并模拟分析了新风量对系统性能的影响。结果表明:随着单人新风量的增加,地埋管水流量基本保持不变,除湿器入口溶液流量先是急剧下降,而后基本保持不变;再生器入口溶液温度逐渐升高,而再生器耗热量先是急剧下降,而后又逐渐上升,当单人新风量为30 m^3/(h·人)时,再生器耗热量达到最低;除湿器和再生器的湿传递效率均逐渐降低。

When ground source absorption heat pump operates in summer,it spends much energy and is easy to form dew condensation in air-conditioning rooms.This paper proposes a concentrated heatresource driven ground source temperature and humidity independent control air-conditioning system,which combines concentrated heat-resource driven fresh air liquid desiccant unit with borehole free cooling in summer.Choosing a typical office room,the author takes the new system as the study object,establishes the mathematical models of all parts,and then simulates and analyses the performance of the system under different fresh air flows.The results show that,with the increase of individual fresh air flow,borehole water flow remains relatively constant,and liquid flow in the dehumidifier entrance falls rapidly at first,then remains relatively constant;the temperature of liquid in the regenerator entrance gradually increases,and the heat consumption of regenerator falls rapidly at first,then gradually increases;when individual fresh air flow is 30 m^3/（h·person）,the heat consumption of regenerator reaches the lowest;the humidify effectiveness of the dehumidifier gradually decreases,as well as regenerator.