某办公建筑复合式地源热泵空调系统优化分析--基于济南地区

Optimization analysis of a hybrid GSHP system for an office building--Basing on Jinan area

受建筑冷热负荷的不平衡与太阳能资源的丰富程度影响,地源热泵系统的设计常采用通过耦合不同的辅助供热或散热设备的措施来提高系统运行的经济性。为了明确最佳的系统配置,以济南地区某办公建筑的地源热泵空调系统为工程案例,采用TRNSYS软件对5组模型(不同冷却塔辅助散热比例,以及不同的太阳能辅助供热比例)进行运行周期为20年的模拟分析,从地温变化、系统运行效率、初投资及运行成本等方面对上述5种模型进行对比分析,最后选定太阳能-冷却塔-地源热泵系统(辅助冷却比例30%)作为该建筑的空调系统,系统具体配置为钻孔数量26个,冷却塔水流量8.4m 3/h,集热器面积100m 2,水箱容量9m 3。

Considering the imbalance between cooling and heating loads of buildings and also the abundance of solar energy resources,the design of ground source heat pump(GSHP)system is becoming more and more complicated.The economy of system operation can be improved by coupling different auxiliary heating or cooling equipments.In order to confirm the best system configuration,the paper studied a GSHP system located in Jinan area by constructing five different system models with TRNSYS software(with different auxiliary cooling rate and different solar auxiliary heating rate)and simulated the 20 years’system operation.The analysis were conducted according to ground temperature variations,system operation efficiency,initial investment and operation cost.Finally,the solar-cooling tower-GSHP(auxiliary cooling rate of 30%)was chosen for the air-conditioning form of this building.The detailed system configuration are 26 boreholes,water flow of cooling tower is 8.4 m^3/h,solar collector area of 100 m 2 and water tank capacity of 9 m^3.