地源热泵在室内游泳池供暖空调中的应用研究

在分析了地源热泵系统的特点和室内游泳池的冷热负荷概算的基础上，提出了采用地源热泵系统可同时满足室内游泳池的供暖、空调及池水加热3项需求；分析了不同季节地源热泵在游泳池的运行工况。通过分析表明，地源热泵系统的运行费用比传统的冷水机组加燃油锅炉系统可节省费用约50％，比冷水机组加燃气锅炉系统可节省费用21％。     

地源热泵供暖空调的经济性

地源热泵是利用地表浅层土壤能量（地下水、土壤或地表水）作为冬季热泵热源供暖和夏季冷源进行空调的系统,地源温度全年相对稳定的特性使得地源热泵比传统空调系统运行效率要高,地源热泵是否具有经济竞争性仍是一个非常关键的问题,该文对地源热泵与传统的供暖空调系统进行经济性比较。首先将地源热泵与传统供暖方式,如燃煤、燃油和天然气锅炉进行供暖经济性的比较,再将地源热泵与常规电制冷空调方式进行空调经济性的比较,然后将地源热泵与锅炉加空调两种方式共四种方式共四种方案进行综合经济性的比较分析。     

地源热泵—供暖空调节能环保技术

讲述地源热泵的原理及特点,介绍地源热泵的应用方式,分析地源热泵的经济性。     

地源热泵在温水游泳池系统中的应用研究

结合室内温水游泳池的实际运行负荷工况,引进地源热泵技术,在集中热泵主机全部102kW功率完成泳池初次加热之后,实现每天对游泳池160万kcal的热损补偿,解决游泳池所存在的热源问题,同时对温水游泳池采用地源热泵系统的经济性进行分析,与传统加热方式相比,可节能50%以上。     

地源热泵技术在暖通空调中的应用

从地源热泵技术的原理和分类着手,详细介绍了各种地源热泵在暖通空调中的应用情况,对其优缺点和需要解决的问题进行了分析比较,指出地源热泵是节能环保型暖通空调技术,大有发展前景。     

垂直螺旋盘管地源热泵供暖制冷实验研究

结合一实际用户建立垂直螺旋盘管地源热泵实验系统，在供暖制冷工况下测量地下盘管的进出水温度，盘管从地下的取热量、排热量，从而分析系统性能、供热、制冷系数。     

地源热泵在空调中应用的探讨

本文介绍了地源热泵的特点、工作原理和分类，分析了地源热泵的关键技术，并与相关的热泵技术进行了性能比较，对地源热泵进行了技术经济分析，最后还介绍了地源热泵技术在制冷空调中的广阔应用前景。     

地源热泵系统施工技术

推广地源热泵技术对建筑供热和空调系统的节能有重要意义，经济合理地设置地热换热器是应用地源热泵技术的关键。重点介绍了竖直埋管地热换热器施工技术，特别对地热换热器的钻孔、下管和回填的技术要点和设备进行了详细阐述。     

太阳能地源热泵式空调系统研究

提出了太阳能地源热泵式空调系统的概念,研究了该系统的工作原理。对热管式太阳能集热器和地源热泵的热力计算方法进行了理论分析;结合工程实例,介绍了太阳能地源热泵式空调系统的设计思路和运行方式。     

地源热泵与常规供暖的经济性比较

地源热泵已被用于大型建筑的供热与制冷.通过对一个已使用地源热泵的建筑进行常规供暖设计与计算,再根据热负荷进行水力计算,以及总投资成本和运行成本计算,并将常规供暖与地源热泵进行技术经济分析.     

Analytical g-function for inclined boreholes in ground-source heat pump systems

In the design of ground-source heat pump systems, the calculation of the total length of the bore field is very important because it is responsible for the major part of the initial cost. Some technologies, like direct expansion systems and pile systems, often use inclined boreholes. Most design methods do not consider this effect and may overestimate the total length needed for a typical application. This paper gives a method for the calculation of time response factors in a form called g-function for inclined boreholes. The analytical model can be used in a parameterized optimization algorithm to design an optimum bore field. The method is a generalization of a method previously proposed for vertical boreholes. Comparison of the new g-function with tabulated values found in the literature is given, and an application for a typical design is presented as an example.     

地源热泵垂直埋管的传热模型及计算

建立了垂直埋管地源热泵地热换热器的传热模型,采用有限差分法建立了垂直U型埋管换热器瞬态传热模型的解析解;并且在不同的工况下进行实验测试,与模拟结果进行了对比,结果表明模拟与实验能较好地吻合,从而使模型的正确性得到了验证。可为地源热泵的设计和运行提供理论指导。     

基于预测的复合地源热泵系统控制方法实现

在冬冷夏热且夏季冷负荷远大于冬季热负荷的地区常采用带有冷却塔的复合式地源热泵系统,其控制策略存在极大的优化空间。文章提出了直接比较冷却塔和与土壤换热器相连的板式换热器的出口温度的控制方法,并通过人工神经网络预测板式换热器机组侧的出口水温来实现此控制方法。通过FLUENT软件建立复合式地源热泵系统动态数值模型,获取建立神经网络的数据,采用3层BP网络,建立了多个预测板式换热器机组侧出口温度的模型。研究结果表明,采用神经网络可以准确实现此预测,绝对误差不超过0.4℃。     

太阳能辅助地源热泵联合供暖(制冷)运行模式分析

太阳能和地源热泵联合供暖系统以其良好的节能和环保特性,近年来得到国内外众多学者和研究机构的广泛关注。总结了国内外地源热泵和太阳能集热器联合供暖（制冷）技术的发展现状和最新研究动态,介绍了太阳能辅助地源热泵联合供暖（制冷）的技术和特点,指出太阳能辅助地源热泵供暖（制冷）技术具有较好的发展前景。     

别墅型建筑地源热泵空调系统设计

地源热泵是一种利用土壤所储藏的太阳能资源作为冷热源进行能量转换的供暖制冷空调系统,通过输入少量的高品位能源(如电力、机械功、燃气和液体燃料),实现热量从低温热源向高温热源的转移.以上海某小型别墅为对象,设计了一套家用地源热泵空调系统.首先计算了夏季冷负荷和冬季热负荷,然后根据冷、热负荷选择一套水源热泵机组(MWH080CR型机组)和相应的风机盘管,进行了室内水管环路系统、土壤热交换器和地板采暖的设计选型,最后对系统的能效比进行了计算.结果表明,该空调系统具有节能环保、稳定可靠、舒适耐用等优点.     

复合式土壤源热泵系统设计

设计了一套复合式土壤源热泵性能实验台,采用冷却塔作辅助冷源、太阳能热水器作辅助热源,能够实现冬季供暖、夏季供冷、一年四季提供60~80℃生活热水的功能。给出了系统中热泵机组、空调末端设备、冷却塔、水泵、太阳能热水器等主要部件的选型计算方法,经搭建好的土壤源热泵性能实验台运行测试,制冷和制热效果良好,同时也解决了土壤热平衡问题。     

U型波纹埋管对于增强土壤源热泵换热性能的研究

为了增强土壤源热泵系统地下埋管换热器的换热性能,通过CFD方法,探讨改用波纹管对地下换热所产生的影响,首次提出采用波纹管代替光管作为强化地下埋管换热器换热效率。     

Exergetic performance evaluation of heat pump systems having various heat sources

In this study heat pump systems having different heat sources were investigated experimentally. Solar‐assisted heat pump (SAHP), ground source heat pump (GSHP) and air source heat pump (ASHP) systems for domestic heating were tested. Additionally, their combination systems, such as solar‐assisted‐ground source heat pump (SAGSHP), solar‐assisted‐air source heat pump (SAASHP) and ground–air source heat pump (GSASHP) were tested. All the heat pump systems were designed and constructed in a test room with 60 m² floor area in Firat University, Elazig (38.41°N, 39.14°E), Turkey. In evaluating the efficiency of heat pump systems, the most commonly used measure is the energy or the first law efficiency, which is modified to a coefficient of performance for heat pump systems. However, for indicating the possibilities for thermodynamic improvement, inadequate energy analysis and exergy analysis are needed. This study presents an exergetic evaluation of SAHP, GSHP and ASHP and their combination systems. The exergy losses in each of the components of the heat pump systems are determined for average values of experimentally measured parameters. Exergy efficiency in each of the components of the heat pump systems is also determined to assess their performances. The coefficient of performance (COP) of the SAHP, GSHP and ASHP were obtained as 2.95, 2.44 and 2.33, whereas the exergy losses of the refrigerant subsystems were found to be 1.342, 1.705 and 1.942 kW, respectively. The COP of SAGSHP, SAASHP and GSASHP as multiple source heat pump systems were also determined to be 3.36, 2.90 and 2.14, whereas the exergy losses of the refrigerant subsystems were approximately 2.13, 2.996 and 3.113 kW, respectively. In addition, multiple source heat pump systems were compared with single source heat pump systems on the basis of the COP. Exergetic performance coefficient (EPC) is introduced and is applied to the heat pump systems having various heat sources. The results imply that the functional forms of the EPC and first law efficiency are different. Results show that Ex_loss,total becomes a minimum value when EPC has a maximum value. Copyright © 2008 John Wiley & Sons, Ltd.     

地源热泵地下岩土热物性的测定方法

提出了可用于现场测量计算地下岩土综合热物性参数的方法。垂直埋设在地下的换热器与周围岩土换热过程可以近似地看作半无限大介质中常热流边界条件下的非稳态导热过程来处理。这种方法克服了其他常用研究模型对钻孔中埋管的具体位置、上升管及下降管之间的距离、换热器材料和回填材料的物性参数的要求,相应地消除了上述各个参数所带来的误差。通过测量地埋换热器的循环水流量、进出水口温度,加热器的加热功率等数据确定地下岩土综合的热物性参数。     

Evaluation of heat exchange rate of GHE in geothermal heat pump systems

Total thermal resistance of ground heat exchanger (GHE) is comprised of that of the soil and inside the borehole. The thermal resistance of soil can be calculated using the linear source theory and cylindrical source theory, while that inside the borehole is more complicated due to the integrated resistance of fluid convection, and the conduction through pipe and grout. Present study evaluates heat exchange rate per depth of GHE by calculating the total thermal resistance, and compares different methods to analyze their similarities and differences for engineering applications. The effects of seven separate factors, running time, shank spacing, depth of borehole, velocity in the pipe, thermal conductivity of grout, inlet temperature and soil type, on the thermal resistance and heat exchange rate are analyzed. Experimental data from several real geothermal heat pump (GHP) applications in Shanghai are used to validate the present calculations. The observations from this study are to provide some guidelines for the design of GHE in GHP systems.