小型水源热泵系统运行特性研究

发布时间：2018-01-03 07:02

  本文关键词：小型水源热泵系统运行特性研究　出处：《天津商业大学》2014年硕士论文　论文类型：学位论文

  更多相关文章： 水源热泵 对比 实验研究 模拟研究

【摘要】：本文针对住宅建筑中利用水源热泵及空气源热泵系统的能耗及运行性能开展实验及模拟研究，分析并对比研究两种空调系统的运行特性及其能耗。通过本文中对小型水源热泵系统的实验研究及模拟研究，为今后其在小型建筑中的应用提供一些参考。同时，通过对小型水源热泵及空气源热泵系统运行的特性对比研究，也为两种系统在不同建筑的适用性方面提供一些参考。 建立了小型水源热泵系统实验台，在不同水源供水温度、水流量、室内干球温度条件下，对系统的蒸发压力、冷凝压力、耗功率等性能参数进行了测试及采集，分析研究各参数对系统的制热量及制热系数的影响规律。同时在该系统试验台进行相应改造对空气源热泵系统的供热工况进行了实验测试，研究在不同室内及室外干球温度条件下，系统的蒸发压力、冷凝压力、耗功率等性能参数变化规律，及其系统的制热量及制热系数的影响因素进行了分析研究。研究结果表明：水源（空气源）温度或流量升高时，系统蒸发压力，制热量及制热系数均升高；水源流量升高时，系统耗功率也随之升高；室内干球温度升高时，系统耗功率升高，制热系数下降。对于水源热泵，水温每升高1℃，制热量增加7.4％，制热系数增加7.28％；水流量每升高1kg/s,制热量增加3.9％，制热系数增加4.45％。所以水源温度比流量对系统性能的影响更大。而室内干球温度每升高1°，制热系数降低2.96％。对于空气源热泵，室外干球温度每升高1℃，制热量增加1.74％，制热系数增加2.2％；室内干球温度每升高1℃，制热量降低1.6％，制热系数降低1.27％。所以室外干球温度比室内干球温度对系统性能的影响更大。 在实验研究的基础上，，对小型水源热泵系统及空气源热泵系统的各性能参数进行对比研究。研究结果表明：在同样的热源温度下，水源热泵比空气源热泵的制热量和制热系数更高。同时，拟合出了空气源热泵及水源热泵系统能效系数随各影响因素变化的曲线及关系式，以作为模拟研究的理论依据。 对住宅建筑采用水源热泵和空气源热泵系统分别进行了建筑负荷和系统能耗的模拟研究，研究采用equest软件进行建模及计算，选取了南京地区三层四户别墅住宅建筑为模拟对象，以南京市气象参数为依据，并利用实验拟合出的水冷、风冷热泵性能参数变化关系式，计算建筑全年负荷及系统能耗逐时变化规律，分析空气源热泵及小型水源热泵系统的负荷率、耗功率、制冷量、制热量、制冷及制热系数等，并对比两种热泵系统供热能耗和制冷能耗情况，比较两种系统的运行情况及水源热泵系统节能的潜力。模拟结果表明：住宅建筑应用水源热泵的全年运行能耗比空气源热泵低30-40％左右，运行成本更低。
[Abstract]:In this paper, the energy consumption and operating performance of water source heat pump and air source heat pump system in residential buildings are studied experimentally and simulated. The operating characteristics and energy consumption of the two air conditioning systems are analyzed and compared. The experimental and simulation research on the small water source heat pump system is carried out in this paper. At the same time, through the small water source heat pump and air source heat pump system operation characteristics comparative study. It also provides some reference for the applicability of the two systems in different buildings. A small water source heat pump system test bench was set up. Under the conditions of different water supply temperature, water flow rate and indoor dry ball temperature, the evaporation pressure and condensation pressure of the system were established. Performance parameters such as power consumption were measured and collected. The influence of various parameters on the heating capacity and heating coefficient of the system is analyzed and studied. At the same time, the heat supply condition of the air-source heat pump system is tested by the corresponding modification of the system test rig. Under different indoor and outdoor dry ball temperature conditions, the performance parameters of the system such as evaporation pressure, condensation pressure and power consumption were studied. The results show that when the temperature or flow rate of water source (air source) increases, the evaporation pressure, heating capacity and heating coefficient of the system increase. When the water flow increases, the power consumption of the system also increases. When the indoor dry ball temperature increases, the power consumption of the system increases and the heating coefficient decreases. For the water source heat pump, the heating capacity increases by 7.4and the heating coefficient increases by 7.28for the water source heat pump when the water temperature rises by 1 鈩

本文编号：1372859