道路融雪化冰—地源热泵复合式系统研究

发布时间：2018-05-18 17:53

  本文选题：TRNSYS + 地源热泵　； 参考：《天津大学》2014年硕士论文

【摘要】：建筑能耗将成为社会最大耗能产业,服务于建筑的采暖通风等运行能耗将占整个社会能源消耗的1/3以上。我国能源结构主要以一次能源为主,大量的一次能源消耗造成城市微环境不断恶化,尤其最近京津冀地区雾霾天气对人体健康的影响更是显而易见。为此国家十分重视可再生能源的应用。其中,浅层地热能更是以其特有的优势得到国家的大力推广和扶持。另外,冬季路面积雪结冰成为北方地区交通安全出行的重大隐患,常用的除雪方法存在很多弊端和环境污染问题。本文综合考虑地源热泵应用过程中出现的热失衡问题和道路融雪化冰的需求,探索道路融雪化冰-地源热泵复合系统运行的可行性。论文在搭建的道路太阳能实验系统上进行了道路换热器换热实验研究,分析了下雪天道路换热的运行数据,确定道路单位面积融雪化冰所需要的热量。并统计了天津地区3年间平均每年的下雪天数。在此基础上,以天津地区某建筑为研究对象,利用eQUEST软件对该建筑进行能耗模拟,采用地源热泵为建筑供冷供热。在夏季平均冷负荷是冬季热负荷1.3倍的情况下,通过道路融雪化冰来平衡机组向土壤的排热量大于从土壤取热量的不平衡性,理论分析了建筑可匹配的道路融雪化冰面积。进而利用TRNSYS模拟软件对道路融雪化冰-地源热泵复合系统的运行进行了模拟。夏季根据建筑负荷的变化,采用地埋管直接供冷和机组供冷相结合的运行方式,冬季复合式系统为建筑供热的同时,在下雪天为路面融雪化冰。模拟结果显示夏季结束时,土壤温度升高了4.1℃,机组平均运行效率为5.0;冬季供热结束时,土壤温度降低到12.5℃,机组平均运行效率为3.3。而道路融雪化冰出口温度在4℃左右,高于普通路面温度,采用乙二醇水溶液做循环介质,可以起到融雪化冰的作用。该复合式系统利用土壤的跨季节蓄热,不仅解决了地源热泵热失衡问题,同时提高了下雪天道路的安全系数,也有效地节约了能源。
[Abstract]:Building energy consumption will become the biggest energy consumption industry in the society, and the energy consumption of heating and ventilation will account for more than one-third of the energy consumption of the whole society. Primary energy is the main source of energy in China, and a large amount of primary energy consumption has resulted in the deterioration of urban microenvironment, especially the recent impact of haze weather on human health in Beijing-Tianjin-Hebei region. Therefore, the country attaches great importance to the application of renewable energy. Among them, shallow geothermal energy is due to its unique advantages to be vigorously promoted and supported by the country. In addition, snow icing on road surface in winter has become a major hidden danger for traffic safety travel in northern China. There are many drawbacks and environmental pollution problems in common snow removal methods. Considering the problem of heat imbalance in the application of ground source heat pump (GSHP) and the need of road snow melting and ice melting, the feasibility of road snow melting ice combined with ground source heat pump (GSHP) system is explored in this paper. In this paper, the experimental study of road heat exchanger is carried out on the road solar energy experimental system, and the operation data of road heat transfer in snowy days are analyzed, and the heat needed for snowmelt and ice melting per unit area of road is determined. The average number of snowy days per year in Tianjin is calculated. On this basis, taking a building in Tianjin area as the research object, the energy consumption of the building is simulated by using eQUEST software, and the ground source heat pump is used to supply cooling and heating for the building. Under the condition that the average cooling load in summer is 1.3 times of that in winter, the heat discharge from the unit to the soil is greater than that from the soil by the road melting ice. The theoretical analysis is made on the road melting ice area which can be matched by the building. Furthermore, the operation of road snowmelt ice-ground source heat pump compound system is simulated by TRNSYS software. According to the change of building load in summer, the combined operation mode of direct cooling of buried pipe and unit cooling is adopted. In winter, the composite system provides heating for buildings, and snow-melting and ice-melting on the road surface in snowy days at the same time. The simulation results show that at the end of summer, the soil temperature rises 4.1 鈩，

本文编号：1906619