摘要
土壤热平衡对地源热泵系统的长期稳定运行和经济性能具有重要影响.地下埋管换热器换热情况复杂,各地区地域特征和气候具有较大的差异性,且建筑物类型的多样性,需要针对具体工程开展有针对性的研究.以南通地区住宅建筑为例,利用Design Builder能耗模拟软件,进行了全年逐时负荷计算.运用TRNSYS建立了冷却塔辅助地源热泵系统动态仿真模型,对系统冷却塔容量的确定和运行控制策略进行了优化.综合初期投资和运行费用,冷却塔按50%容量选型,与地埋管串联,源侧热泵出口和土壤温度差值大于等于10℃.而且,冷凝器入口温度和当地湿球温度的差值大于等于4℃开启运行,为经济性能最好的方案.
Soil heat balance has an important influence on the long-term stable operation and economic performance of ground-source heat pump system.The heat transfer of buried tube heat exchanger is complicated,the regional characteristics and climate are different,and the types of buildings are diversified.Therefore,it is necessary to carry out a targeted study on specific engineering realities and cases.Taking a concrete residential building located in Nantong as an example,this paper makes use of Design Builder energy simulation software to calculate the hourly load,and uses TRNSYS to establish the dynamic simulation model of the cooling tower auxiliary ground source heat pump system,and optimizes the capacity of the cooling tower and the operation control strategy.Considering the initial investment and operation cost,the cooling tower is selected according to 50%capacity and connected in series with the buried pipe.The difference between the outlet of the source side heat pump and the soil temperature is greater than or equal to 10℃.Moreover,the difference between the inlet temperature of the condenser and the local wet bulb temperature is greater than or equal to 4℃,which is the best economic scheme.
作者
史惠强
谢爱峰
郭珑珑
SHI Huigiang;XIE Aifeng;GUO Longlong(Longxin Construction Group Co.,Ltd.,Nantong,Jiangsu 226100,China)
出处
《江苏建筑职业技术学院学报》
2018年第3期46-52,共7页
Journal Of Jiangsu Vocational Institute of Architectural Technology
基金
江苏建筑节能与建造技术协同创新中心龙信建设集团专项基金资助项目(SJXTLX1705)
关键词
冷却塔辅助地源:热泵系统
土壤热平衡
运行控制策略
地埋管换热
cooling tower auxiliary ground source
heat pump system
soil heat balance
operation control strategy
ground pipe heat exchange
