浙江公共建筑地源热泵系统设计优化研究

The Study of Ground Source Heat Pump System Design Optimization for Public Buildings in Zhejiang Province

目前,地源热泵作为一种可再生能源技术在全国范围内广泛推广,以浙江宁波某公建能源站建设项目为引,在项目原方案基础上提出了优化后的地源热泵复合能源系统形式。通过介绍“地源热泵+冷水机组+燃油锅炉”系统、“地源热泵+冷水机组+燃气锅炉”系统、“地源热泵+冷水机组”系统及“地源热泵+辅助冷却”系统的原理,分析各系统的运行优劣及应用特点。同时提出了地源热泵应用的冷热平衡问题解决方案,并对四个系统进行初投资、运行能耗、运行费用及环保效益方面的对比,结果表明,将燃油锅炉改为燃气锅炉能够节省一定运行费用且环保效益更好,地源热泵装机越大,运行费用越低,对于浙江地区需要充分考虑冷热负荷的差异情况,若冷负荷远大于热负荷,建议设置冷水机组进行土壤冷热平衡调节,若冷负荷略大于热负荷,建议综合考虑项目具体情况,增设冷却装置进行调节。本方案通过研究浙江某一公建项目地源热泵的使用特征,为类似于本方案工况的夏热冬冷地区地源热泵系统技术应用提供一定参考价值。

At present,ground source heat pump as a renewable energy technology is widely promoted throughout the country.In this paper,based on the construction project of a public energy station in Ningbo,Zhejiang province,an optimized form of ground source heat pump composite energy system is proposed on the basis of the original project scheme.By introducing the principles of Energy system combining ground source heat pump and chiller and oil fired boiler,Energy system combining ground source heat pump and chiller and gas fired boiler,Energy system combining ground source heat pump and chiller and Energy system combining ground source heat pump and auxiliary cooling device.Analytic the operation advantages and disadvantages and application characteristics of each system,and puts forward the application of ground source heat pump hot and cold equilibrium solutions to problems,and the four systems in initial investment,operating energy consumption,operation cost and environmental benefits of comparison,the results showed that the oil burning boiler instead of gas boiler to save operating cost and better environmental benefits,the ground source heat pump installed,the greater the operating cost is lower,For zhejiang region,the difference of cold and heat load should be fully considered.If the cold load is much greater than the heat load,it is recommended to set up a chiller to adjust the soil cold and heat balance;if the cold load is slightly greater than the heat load,it is recommended to add cooling devices for adjustment comprehensively considering the specific situation of the project.This scheme provides some reference value for the technical application of ground source heat pump system in hot summer and cold winter areas similar to the scheme by studying the use characteristics of a public construction project in Zhejiang.