夏热冬冷地区地源热泵系统夜间土壤蓄冷的研究

发布时间：2018-01-11 02:16

  本文关键词：夏热冬冷地区地源热泵系统夜间土壤蓄冷的研究　出处：《南京工业大学》2015年硕士论文　论文类型：学位论文

  更多相关文章： 夏热冬冷 地源热泵 TRNSYS 蓄冷

【摘要】：地源热泵因其稳定、高效的特点,在夏热冬冷地区的应用十分广泛。随着我国地源热泵应用推广工作的日趋高涨,一些问题也初见端倪。从系统技术研究和应用推广的角度来说,节能经济、长期持续高效运行是最重要的,而土壤热平衡是系统持续高效运行的保证和关键所在。因为夏热冬冷地区的气候特征,导致夏季建筑的冷负荷与冬季的热负荷不同,土壤全年累积排热量与取热量差异很大,由此产生的土壤热堆积的问题,导致系统运行效能下降,影响长期安全可靠运行。本文综合考虑了我国夏热冬冷地区的气象条件、建筑物的负荷特性、土壤特性等因素,运用trnsys建立地源热泵-冷却塔制冷期夜间蓄冷模型,通过实测数据的验证,对模型进行反复调试,得到比较可靠的、准确的模型。利用DeST计算建筑全年逐时负荷,作为仿真模拟的负荷基础。对该仿真模型进行不同时间的模拟,从短期和长期两个角度来分析系统性能参数的变化规律。同时对提出的系统与常规的地源热泵系统及其复合系统运行的参数值进行比较分析。得出夜间土壤蓄冷系统在运行十年后土壤温度场仅升高了0.8℃,且系统在制冷期可以保持在高效运行状态下,对缓解土壤热堆积问题有很大的帮助。在模拟结果的基础上对几种系统进行节能经济性评价,针对系统运行五年的能耗及其运行费用进行分析比较,得出该系统具有较好的经济性、节能性,对实际工程具有指导意义。
[Abstract]:Ground-source heat pump (GSHP) is widely used in hot summer and cold winter area because of its stable and high efficiency. From the perspective of system technology research and application promotion, energy-saving economy, long-term sustainable and efficient operation is the most important. The balance of soil heat is the guarantee and key to the continuous and efficient operation of the system. Because of the climate characteristics in hot summer and cold winter, the cooling load in summer is different from that in winter. There is a great difference between the accumulated heat discharge and the heat removal in the whole year, which leads to the problem of soil heat accumulation, which leads to the decline of the system operation efficiency. This paper considers the meteorological conditions, load characteristics of buildings, soil characteristics and other factors in hot summer and cold winter area. Trnsys is used to establish the model of night storage in the refrigeration period of ground-source heat pump and cooling tower. Through the verification of the measured data, the model is debugged repeatedly and the model is more reliable. DeST is used to calculate the hourly load of the building, which is the base of the simulation. The simulation model is simulated in different time. The variation law of system performance parameters is analyzed from two aspects of short and long term. At the same time, the operating parameters of the proposed system and the conventional ground source heat pump system and its composite system are compared and analyzed. The soil temperature field of the system increased only 0.8 鈩，

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