【作者】 李阳春；

【导师】 陈光明；

【作者基本信息】 浙江大学 ， 制冷及低温工程， 2003， 硕士

【摘要】 节能与环保是关系到21世纪国民经济可持续发展的两个重大课题。全世界都在致力于低能耗、无污染、可再生新能源工程技术的研究与应用。本文结合现阶段国内外的研究进展，以目前尚处于发展阶段的新型空调技术——地源热泵技术作为研究课题，为空调的节能与环保提出一个新的发展方向。主要研究内容如下： 1．对现有的地源热泵埋管换热器传热模型、设计方法进行对比分析。在总结了国内外埋管换热器设计经验的基础上，进行了埋管换热器计算机辅助设计程序开发，该程序可用于水平埋管、U型埋管以及套管式换热器的设计计算。重点介绍了程序开发的系统结构、主要功能、涉及到的计算方法等。计算程序的开发不仅使换热器设计流程更加清晰，也大大缩短了设计周期，提高了计算精度。 2．提出了地源热泵—辐射地板联合系统的概念，阐述了该系统基本原理以及运行和控制模式。结合工程实际，设计了一套应用于别墅的新型空调系统。重点介绍了建筑空调负荷计算、地下埋管换热器系统、辐射地板系统以及热泵和建筑物内分配系统设计等方面的内容。地源热泵联合辐射地板对房间进行冷暖联供，既具有地源热泵季节性平均性能系数高、土壤蓄热能力强、随环境温度波动小等优点，且能改善空气源热泵系统新风供给量与耗能之间的矛盾关系。 3．以地源热泵空调系统为研究对象，从技术和经济性两方面对两种地源热泵(水平埋管、垂直埋管)与常规空气源热泵空调系统进行了分析和比较。分别计算了上述三种系统的COP、逐月制冷／制热量，并分析了初投资、运行和维护费用、投资回收期、净价值以及偿还利率等经济学参数对不同系统的影响。结果表明地源热泵系统在降低空调高峰负荷以及总能耗等方面比空气源热泵系统具有明显的优势。更多还原

【Abstract】 Energy saving and environmental protection are always two prevailing problems since last century. As a result, the investigation and application of low-cost, nonpolluting and renewable energy engineering technique are widely concerned. In this paper, a novel technique of air-conditioning, ground-source heat pump is mainly discussed, based on the existing research developments. It brings forward a new way to the energy saving and environmental protection of air-conditioning systems. The main research contents of this paper are as following:1. Based on the analysis of existing heat transfer models, design methods and experiences of the ground loop heat exchangers, a computer-aided design software is proposed. It can be used to design the horizontal loop, vertical loop and double-pipe heat exchangers. The main structure, functions and calculation methods of the software are discussed in detail. It is proved that the application of the computer-aided design can improve the calculation precision, and shorten the design period.2. The integrated system combined radiant floor with ground-source heat pump is discussed. The basic theory, various operating and controlling models of the system are described. Based on the theory of this integrated system, a new air-conditioning system applied to the villadom is designed. The calculation and design procedures of airconditioning load, ground loop heat exchangers, radiant floor system, distribution system between heat pump and build are mainly introduced. An array of benefits is provided with the application of the integrated system, such as high COP&SPF, energy saving, small fluctuation with the ambient temperature, improving the conflict between the fresh air supply and energy consumption and etc.3. A comparison has been made on ground-source heat pump (GSHP) with the air-source heat pump (ASHP). Two main categories of ground-source heat pumps (horizontal and vertical) are analyzed technically and economically. Monthly heating/cooling capacities and coefficients of performance for air-source and vertical and horizontal ground-source systems are calculated. The desired type of heat exchanger is determined by considering economic factors such as the total costs, comprised of the capital and operating costs. The cost-effectiveness of investments of each system is discussed, with parameters, such as the payback period, net present value and internal rate of return. It is concluded that the ground-source heat pumps have the potential to reduce peak demands and total electricity consumption, thus offer better techno-economic viability.更多还原