太阳能热泵供热系统的实验研究

开发新能源和节能是寻求能源出路的两大重要途径，太阳能热泵供热系统以其显著的节能性和环保性具有广阔的发展前景。该文简单介绍了太阳能热泵供热系统实验台及实验台测试系统的建设，着重介绍了太阳能热泵冬季供暖工况的实验研究，考察了系统的整体供热性能及主要设备的工作性能。根据实验研究的结果，提出了有关系统设计方面的参考数据。     

广东地区太阳能-空气源热泵复合系统供暖供生活热水实验研究

构建了一种太阳能-空气源热泵复合供热系统,在广东地区冬季的晴天和全阴天进行供暖供生活热水实验测试。针对办公建筑供暖供生活热水需求,定时间段供生活热水同时进行供暖实验。实验结果表明:晴天热泵相较于全阴天工况节电1.16 kW·h,供热效果优于全阴天工况,太阳能-空气源热泵复合供热性能相较于单独的空气源热泵更有显著优势;太阳能-空气源热泵复合系统供暖供生活热水期间,复合系统COP_(sys)平均值为4.71、波动范围在4.20～5.38,空气源热泵系统COP_(hp)平均值为4.60、波动范围在4.08～5.10。     

太阳能与土壤源耦合供暖系统的实验研究

在分析太阳能、土壤源热泵及联合供热特点的基础上,研究了太阳能热泵独立系统、土壤源耦合热泵系统运行模式的制热性能和节能效果,建立了太阳能蓄能-热泵耦合热泵系统的供暖模式及优化模型.通过采暖季初期的太阳能蓄能、供暖,土壤源热泵独立供暖及太阳能-土壤源耦合热泵供热的实验研究,验证了太阳能-土壤源耦合热泵供暖模式的可行性和经济...     

太阳能-海水源热泵联合供暖系统的模拟研究

将太阳能与水源热泵结合,构建了太阳能-海水源热泵联合供暖系统,确定其联合供暖模式。以大连地区为例,采用TRNSYS软件对系统进行模拟计算,以此分析太阳能-海水源热泵复合系统的运行情况,并对其节能效益进行评价。结果表明:冬季采用太阳能-海水源热泵系统,可提高热泵机组的制热性能系数,系统节能率为25.8%。     

天津地区太阳能、土壤热源的性能研究

以天津地区气象资料和实验结果为依据，研究天津地区冬季太阳能、土壤热源性能，为研制太阳能－土壤热源热泵提供可行性依据。太阳能－土壤热泵系统采用太阳能热泵和土壤热泵交替使用的方式，是很有前途的热泵系统。     

太阳能空气集热及转轮除湿/加湿混合系统冬季供暖分析

针对一种太阳能空气集热及转轮除湿混合系统,在上海冬季典型低温干燥气候条件下对供暖运行进行研究,实验测试直接供暖,加湿供暖和热泵效应供暖3种不同供暖模式的供暖效果,分析冬季太阳辐射对空气集热温度的影响,不同环境温湿度下3种工作模式对供暖温湿度的影响以及加湿供暖与热泵效应供暖模式中回风对供暖温湿度的影响。实验结果表明,3种模式下送风温度随再生温度升高而升高,送风湿度取决于处理风入口湿度和再生温度的大小,系统在采用回风的加湿供暖模式下,平均送风湿度达到12 g/(kg干空气),送风温度为26~37℃,冬季全天大部分时间能有效满足室内送风的温湿度要求。     

寒冷地区户用大平板太阳能集热器-空气源热泵系统性能研究

针对太阳能难以单独稳定供暖和空气源热泵供暖成本高的问题，提出空气源热泵辅助太阳能稳定供暖构想，在甘肃省兰州市七里河区魏岭乡绿化村研发搭建大平板太阳能集热器-空气源热泵系统，对比研究晴天、多云和阴天3种典型工况下大平板太阳能集热器的集热效率、太阳能热泵和空气源热泵COP、太阳能保证率、系统总供热量和系统能效比等性能参数。结果表明：晴天、多云和阴天系统集热效率分别为44.9%、38.7%和20.6%,3种工况下太阳能热泵COP均为4.0，空气源热泵COP分别为3.5、3.3和3.1，太阳能保证率分别为38.1%、32.3%和12.9%，系统全天供热量分别为142.52、135.22和120.96 kWh，系统能效比分别为3.5、3.4和2.7。研究结果证明大平板太阳能集热器-空气源热泵系统用于寒冷地区单体建筑供暖的可行性，可为寒冷地区农村单体建筑的供暖提供一种新途径。     

R290直膨式太阳能热泵供暖系统实验研究

为分析直膨式太阳能热泵耦合地板辐射供暖系统在北方寒冷地区的实际运行特性,设计并搭建以丙烷(R290)为工质的直膨式太阳能热泵供暖实验平台,分析冬季不同运行工况下环境参数对系统热力性能的影响。实验结果表明：系统可实现室内供暖的稳定性,实验测试期间平均室温保持在16.1～20.8℃之间,热泵系统性能系数(COP)保持在2.57～4.30之间,供暖系统COP保持在2.24～3.98之间。太阳辐照度每增加50 W/m²,热泵系统COP提升4.9%;环境温度每升高1℃,热泵系统COP提升2.4%。太阳辐照度对热泵系统的电子膨胀阀开度和工质质量流量影响较为显著。当终止水温从45℃提升至55℃时,热泵系统COP降低12.2%;而在终止水温为50℃时,供暖系统COP达到最大值3.37。     

双热源太阳能热泵在住宅建筑中的应用研究

提出一种新型的太阳能-空气复合热泵系统,并对其运行策略进行介绍。系统同时满足建筑物室内供暖、制冷及热水需求,具有较高的综合利用性能。通过进行太阳能供暖实验,分析太阳能集热、蓄热系统对室内供暖保证率的影响。     

复合地源热泵系统冬季供暖运行实验研究

介绍了地源热泵在冬季运行供暖的实验研究,具体分析了长期连续运行时土壤温度的变化规律,热泵机组系统的COP变化情况,以及太阳能辅助系统与地源热泵系统联合运行时土壤温度的变化规律,热泵机组系统的COP变化情况.试验数据表明了增加太阳能辅助地源热泵系统后,显著地提高了冷凝器出口温度和室内温度,有效地提高了热负荷,增加了供热面积.总结出了本地区地源热泵系统的一般运行规律.     

太阳能热泵低温地板辐射供暖系统的研究与展望

太阳能热泵低温地板辐射采暖系统是以太阳能热泵为热源,以地板辐射采暖系统为末端装置的新型供暖系统.本文综述了太阳能热泵在国内外的研究与应用,并阐述了太阳能热泵低温地板辐射供暖系统的工作原理及在国内的研究现状.分析了该系统的特点,结果表明该系统是一种舒适、经济和节能的理想供热系统.本文还探讨了该系统在当前的应用中尚待解决的问题.     

A comparative study of solar assisted heat pump systems for canadian locations

The feasibility of solar assisted heat pump systems for space heating and domestic hot water preheating in Canada is examined by simulating the performance of these systems on a computer using the program WATSUN. Simulations are carried out using meteorological data for seven representative Canadian cities, two different building types, and six types of system configurations. For the solar assisted heat pump system, twenty year life cycle cost comparisons are made with two reference systems, namely a conventional resistance heating system and an air-to-air heat pump system, based on current economic parameters and projected escalation scenarios for electricity rates.Results of the study show that the solar assisted heat pump systems conserve significant amounts of energy over resistance heating and heat pump systems. On the life cycle unit cost basis, solar assisted heat pump systems costs are relatively insensitive to location, but the dependence on building types is substantial with multiplex dwellings showing the least cost. Liquid based dual source solar assisted heat pump systems are found to be cost effective over resistance heating (but not over an air-to-air heat pump system) at some of the locations for multiplex units. They are not cost effective for single family dwellings at the present time.     

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。     

如何保证地源热泵式沼气池加温系统长期稳定运行

针对地源热泵式沼气池加温系统中出现的冬夏季取排热不平衡从而影响其长期稳定运行的问题,本文在采取控制运行方式、增加辅助热源和蓄热系统解决方法的分析基础上,从充分利用可再生能源和地源热泵设备的角度出发,提出热泵供热和制冷互补模式与太阳能-地源热泵多功能互补模式,并对其可行性进行分析。     

太阳能蒸发面板为辅助热源的空气源热泵系统的分析

在传统太阳能热泵基础上,提出中间安装有制冷剂蒸发管的太阳能为辅助热源的空气源热泵,能够解决夏季制冷、冬季采暖和全年热水供应问题,同时在寒冷高湿地区也可以除霜。节能经济性可观。     

太阳能热泵供暖系统的热经济性分析

基于有限时间热力学理论和集热器线性热损失模型,建立了太阳能热泵供暖系统的热力学模型,并对该系统进行了热经济分析.研究在给定供热率和初投资的约束条件下,以系统的供热系数COHF,作为热经济性目标函数,得出了在目标函数取最大时系统最佳的运行性能系数和设计参数.同时还研究了初投资对系统运行以及设计参数的影响,得出了对应给定供热率系统的最佳初投资及其相应的设计参数.     

太阳能辅助供暖的地源热泵经济性分析

在冬季土壤温度较低，而且以热负荷为主的北方地区，若完全采用地源热泵来供暖，则地热换热器和机组的初投资均比较高，连续运行的效率也较低，因此，可利用太阳能集热器作为辅助能源。白天完全依靠地源热泵供暖，夜间利用太阳能集热器蓄存的热量，使地热换热器与太阳能集热器串联运行，通过分析比较，该方案比完全用地源热泵供暖更经济。     

Thermal Performance Simulation of a Heat Pump Assisted Solar Desalination System for Kazakhstan Climatic Conditions

ABSTRACT

A numerical model has been proposed in this research work for predicting the energy performance of a heat pump assisted regenerative solar still using phase change heat storage materials such as paraffin wax and hydrate salt. The numerical model is based on energy and mass balance. The performance was simulated for Fort Sherchenko town in Kazakhstan. The performance comparison between the conventional solar still and heat pump assisted regenerative solar still with and without phase change materials are presented. Moreover, the influence of two different phase change materials on thermal performance of a heat pump assisted regenerative solar still are described. The numerical simulation results showed that heat pump assisted regenerative solar still is more energy efficient and produces better productivity when compared to the conventional simple solar still. The use of hydrate salt phase change heat storage material was found to be a good option for enhancing the performance of a heat pump assisted regenerative solar still.     

Investigation of thermal performance of a ground coupled heat pump system with a cylindrical energy storage tank

An analytical and computational model for a solar assisted heat pump heating system with an underground seasonal cylindrical storage tank is developed. The heating system consists of flat plate solar collectors, an underground cylindrical storage tank, a heat pump and a house to be heated during winter season. Analytical solution of transient field problem outside the storage tank is obtained by the application of complex finite Fourier transform and finite integral transform techniques. Three expressions for the heat pump, space heat requirement during the winter season and available solar energy are coupled with the solution of the transient temperature field problem. The analytical solution presented can be utilized to determine the annual variation of water temperature in the cylindrical store, transient earth temperature field surrounding the store and annual periodic performance of the heating system. A computer simulation program is developed to evaluate the annual periodic water and earth temperatures and system performance parameters based on the analytical solution. Copyright © 2003 John Wiley & Sons, Ltd.     

Solar-assisted absorption heat pumps feasibility

An absorption system can be used for space cooling as well as for space heating. This dual purpose may be achieved by using the system as heat pump in wintertime. Absorption heat pump heating may be an interesting alternative, particularly for countries where there is a shortage of electric power.When an absorption unit is used as heat pump, its mode of operation is not modified: the internal temperatures of the cycle are only raised. Commercially available LiBr units were tested as heat pumps. COP and heating capacity were considered as a function of cold source temperature for different temperatures of the useful heat. The COP arrived at 1.7, which must be considered a high value for a thermally driven heat pump.Simulations were carried out in order to compare the performance of “conventional” solar, solar assisted heat pump and the combined series system under two different climate conditions. The series system showed performance 25–75 per cent better than “conventional” solar alone.