长沙地区某地源热泵系统在夏季工况下的节能性分析

发布时间：2018-06-21 18:21

本文选题：地源热泵系统 + 节能性　；参考：《湖南大学》2015年硕士论文

【摘要】：地源热泵可利用较少量的高品位能源(如煤,油以及电等),实现低品位(地下浅层的能量)向高品位的转化。相比于常规空调系统,它提高了能源的使用率,节约了部分高品位能源,因此愈来愈受到人们的重视。目前,在我国大力倡导节能减排、走可持续发展道路的形势下,地源热泵充分展示了它节能、环保以及可持续的特性,具有很大的发展潜力。地源热泵系统的性能与很多因素有关,如地质条件、设备状况,以及后期的运行控制策略等。所以研究地源热泵系统的实际运行特性,有助于更好地达到预期的节能效果。本文从节能的角度出发,主要做了以下几个方面的研究:1.在大量阅读相关参考文献的基础上,作者详细介绍了地源热泵系统能效测评的主要理论内容,总结出应从机组的性能系数、设备的效率、空调水系统的能效比、热泵系统的能效比这几个方面对系统的节能性进行判定。2.结合长沙地区某地源热泵—辐射顶板空调系统,通过测量典型季节内的室内外的热湿环境以及地源侧和用户侧的供回水温度、机组的耗电量等数据来计算该机组及系统的性能系数、系统的能效比以及泵的效率等,进而综合分析地源热泵系统在该项目中是否真正达到了节能的要求。结果显示,项目中运用该地源热泵系统是合理的,达到了节能的效果。3.若地源热泵长时间单独运行,容易产生一些问题,比如:地下热不平衡性问题,机组性能下降,耗能量增多等。所以本文设定在夏季的特定时间内,进行相应的实验,分析免费供冷的特性及对系统节能性的影响。结果表明,实施免费冷,可有效降低耗电量,同时在改善室内舒适性的基础上,有效减少了冬季的采暖能耗。
[Abstract]:Ground-source heat pump (GSHP) can use a small amount of high-grade energy (such as coal, oil and electricity) to realize the conversion from low-grade (energy in shallow underground layer) to high-grade. Compared with the conventional air conditioning system, it improves the utilization rate of energy and saves some high grade energy, so it is paid more and more attention to. At present, ground-source heat pump (GSHP) has shown its characteristics of energy saving, environmental protection and sustainability under the situation of energy saving and emission reduction and sustainable development. It has great potential for development. The performance of ground-source heat pump system is related to many factors, such as geological condition, equipment condition, and later operation control strategy. Therefore, the study of the actual operating characteristics of ground source heat pump system is helpful to achieve the expected energy-saving effect. This article from the point of view of energy conservation, mainly do the following aspects of research: 1. On the basis of reading a lot of related references, the author introduces in detail the main theoretical contents of the energy efficiency evaluation of ground-source heat pump system, and concludes that the performance coefficient of the unit, the efficiency of the equipment, the energy efficiency ratio of the air conditioning water system, and the energy efficiency ratio of the air conditioning water system should be taken into account. The energy efficiency ratio of the heat pump system determines the energy efficiency of the system. 2. 2. Combined with a ground source heat pump radiation roof air conditioning system in Changsha area, the indoor and outdoor heat and moisture environment and the temperature of backwater supply and return on the ground source side and the user side in typical seasons were measured. To calculate the performance coefficient of the unit and the system, the energy efficiency ratio of the system and the efficiency of the pump, etc., and to analyze comprehensively whether the ground-source heat pump system has really achieved the requirement of energy saving in the project. The results show that the application of the local source heat pump system in the project is reasonable, and the energy saving effect is achieved. 3. If the ground-source heat pump is operated alone for a long time, some problems will arise, such as the problem of underground thermal imbalance, the performance of the unit and the increase of energy consumption, etc. So this paper sets a special time in summer, carries on the corresponding experiment, analyzes the characteristic of the free cooling and its influence on the energy saving of the system. The results show that the free cooling can effectively reduce the power consumption and reduce the heating energy consumption in winter on the basis of improving indoor comfort.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU83

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