太阳能热泵热水器

目前,我国热水器市场上的主流产品包括燃气、电热和太阳热水器3类。燃气热水器具有价格低、加热快、出水量大、温度稳定等优点,社会拥有量达到3000多万台,约占市场份额的43％。但是,燃气热水器在使用中存     

太阳能开式环路水源热泵空调系统

提出了太阳能开式环路水源热泵空调系统形式，分析了系统的运行工况、特点及意义。     

太阳能热泵系统

太阳能与热泵相结合的技术是新能源利用技术发展的一个重要方面。文章介绍了太阳能热泵的基本知识，并结合所做的相关试验分析了太阳能和热泵相结合应用的特点。     

浅议高温水源热泵与太阳能组合系统

为解决高温水源热泵的热水源问题,提出用太阳能加热水的太阳能与高温水源热泵组合系统的设想.     

太阳能-水源热泵系统在制备洗浴热水中的应用

以太阳能-水源热泵系统在制备洗浴热水中的应用为例,研究分析太阳能-水源热泵系统的原理、运行工况,并进行太阳能-水源热泵系统的节能减排分析。研究分析得出:太阳能-水源热泵系统可以充分利用太阳能为热水提供热源,同时又回收利用了废水中的废热,从而达到节约高位能源和减少环境污染的目的。     

太阳能热泵的试验研究

<正> 我国北方地区人防工事通常是采取供热升温的方法来解决工事内阴冷潮湿和结露问题的。开发利用太阳能代替常规能源,无疑是一种取之不尽,用之不竭,不污染环境的理想能源。辽宁省人防设计科研所开展了人防工事应用太阳能的研究项目一太阳能热泵,并已通过技术鉴定,现将其试验研究成果作一介绍。     

太阳能热泵供水系统的理论研究

本文对太阳能热泵供水系统各部件进行了分析，建立了理论数学模型。通过对系统动态特性编制的计算机程序计算，得到了与实验值一致的结果，为进一步完善该系统设计提供了理论依据。     

Solar assisted heat pump

The paper describes a series solar heat pump, using Freon 11 as the working fluid. The heat pump is specifically designed for use in a tropical climate where the normal daytime ambient of above 25°C permits the evaporator to be operated at a high temperature (15–50°C depending on solar input). The use of Freon 11 permits conventional reciprocating refrigeration compressors to be used at elevated temperatures without exceeding design pressure limits. A single unit acts as the evaporator and solar collector. When solar insolation is low the evaporator pressure automatically drops so that energy is received from the atomsphere. However the C.O.P. and output are so low in this mode that the system cannot correctly be termed dual source. The water cooled condenser operates in the temperature range of 35–90°C, the heated water representing the useful output of the system. Operation in the air conditioning mode is not possible due to the large specific volume of Freon 11 at low temperatures. A theoretical analysis is presented to describe the system operation, and the experimental results are shown to agree well with the computer simulation. Average values of C.O.P. of between 2.5 and 3.5 were obtained for the small prototype developed with high side storage temperatures of up to 80°C.     

太阳能热泵系统简介

太阳能与热泵相结合的技术是新能源利用技术发展的一个重要方面.文章介绍了太阳能热泵的基本知识,并分析了太阳能和热泵相结合应用的特点,并对其经济性作了初步分析.     

Solar heat pump systems for domestic hot water

Vapour compression heat pumps can upgrade ambient heat sources to match the desired heating load temperature. They can offer considerable increase in operational energy efficiency compared to current water heating systems. Solar heat pumps collect energy not only from solar radiation but also from the ambient air. They can operate even at night or in totally overcast conditions. Since the evaporator/collector operates at temperatures lower than ambient air temperature it does not need glazing or a selective coating to prevent losses. Currently, however, they are not used much at all in domestic or commercial water heating systems. In this paper comparison is made of a conventional solar hot water system, a conventional air source heat pump hot water system and a solar heat pump water heating system based on various capital city locations in Australia. A summary is given of specific electricity consumption, initial and operating costs, and greenhouse gas generation of the three systems dealt with in this paper. The ultimate choice of unit for a particular location will depend heavily on the solar radiation, climate and the local price paid for electricity to drive or boost the unit chosen.     

Solar heat pump drying and water heating in the tropics

In this study, the performance of a solar assisted heat pump dryer and water heater has been investigated. A simulation program has been developed. The predicted results are compared with those obtained from experiments under the meteorological conditions of Singapore. A coefficient of performance (COP) value of 7.0 for a compressor speed of 1800 rpm was observed. Maximum collector efficiencies of 0.86 and 0.7 have been found for evaporator–collector and air collector, respectively. A value of the specific moisture extraction rate (SMER) of 0.65 has been obtained for a load of 20 kg and a compressor speed of 1200 rpm. Results suggest that the total drying time of the product decreases with the increase in drying potential. Drying potential is directly proportional to the air flow rate, drying air temperature and inversely proportional to the air relative humidity. Three important parameters that affect the system performance are solar radiation, compressor speed and the total load placed in the drying chamber. Both SMER and COP decrease with increase in compressor speed.     

Solar assisted heat pump on air collectors: A simulation tool

The heating system of the bioclimatic building of the Greek National Centre for Renewable Energy Sources (CRES) comprises two heating plants: the first one includes an air source heat pump, Solar Air Collectors (SACs) and a heat distribution system (comprising a fan coil unit network); the second one is, mainly, a geothermal heat pump unit to cover the ground floor thermal needs. The SAC configuration as well as the fraction of the building heating load covered by the heating plant are assessed in two operation modes; the direct (hot air from the collectors is supplied directly to the heated space) and the indirect mode (warm air from the SAC or its mixture with ambient air is not supplied directly to the heated space but indirectly into the evaporator of the air source heat pump). The technique of the indirect mode of heating aims at maximizing the efficiency of the SAC, saving electrical power consumed by the compressor of the heat pump, and therefore, at optimizing the coefficient of performance (COP) of the heat pump due to the increased intake of ambient thermal energy by means of the SAC. Results are given for three research objectives: assessment of the heat pump efficiency whether in direct or indirect heating mode; Assessment of the overall heating plant efficiency on a daily or hourly basis; Assessment of the credibility of the suggested simulation model TSAGAIR by comparing its results with the TRNSYS ones.     

Solar operated water-Amonia absorption heat pump for air-conditioning: Modelling and simulation

This study is devoted to the mathematical modelling of an ammoniawater absorption heat pump adapted to solar air-conditioning and including refrigerant and solution storages. Mathematical simulation permits the prediction of the performance of the system during a 24-h period and allows one to estimate its energetic performance, which is compared with those of systems using water-lithium bromide.     

太阳能-地源热泵耦合方式的工程应用分析

利用太阳能辅助地源热泵既节能环保又能进一步提高能源的利用率且对环境无污染。从天津地区的太阳光照强度的角度考虑,以利用太阳能提高机组的效率和承担部分建筑物负荷这两种方式辅助地源热泵。从节能和经济性两个角度进行分析并得出结论:在天津地区利用太阳能分担建筑的部分负荷更节能、经济。     

太阳电池热泵

一种新的太阳能一电力互补热泵已被研制出来用干往宅和小型商用房间的制冷、供暖及烧热水。这种太阳电池驱动系统，称为“太阳站”，可以冷却和加热居往空间，并可在灯火熄灭后提供应急电力，该系统将为房主降低电力费用。 太阳能先驱坎·丁，佛罗里达州盖恩思维尔的热管技术有限公司创建人与总裁，是这种太阳电池热泵空调器的发明人。这种太阳电池热泵的３个关键技术是一只高效直流电机、两个运行速度、负荷由太阳电池和公用电网负担。太阳能和空气调节是一种自然搭配，因为一天当中光照最多的时候也是建筑物内最需要空气调节器的时候。 家…