太阳能热水器—制冷空调复合机装置的实现

提出了一各皮太阳能作为驱动源的固体吸附式制冷与供热联合循环的新思路。在肾热水器的基础上引入固体吸附式制冷循环回路,有效地提高了太阳能在能量转化过程中的利用率,根据本文的思想已制作了样机,为太阳能的综合利用与开发做了一次全新的尝试。     

太阳能热水器—冰箱复合机装置试验研究成果总结

在提出太阳能热水器－冰箱复合机联合循环的设想并制作了实验装置后,对复合机系统进行了多轮实验测试,得到了相同的令人满意的结果。系统在接受一定的能量输入后,对外界既提供热水又提供冰块,为太阳能供热与制冷的综合利用提供了第一手实验数据。本文将对复合机系统在不同工况下的性能实验研究结果进行总结。     

太阳能吸附式制冷技术分析

太阳能吸附式制冷技术是一种非常具有实用意义的技术，可以应用在很多相关领域，但是目前还未得到广泛的应用。主要介绍太阳能吸附制冷技术的发展背景和系统原理，并从集热方式、工质对、系统改进等三个方面分析该技术的发展情况，指出该项技术的广阔应用前景。     

一种新型的太阳能热水器与冰箱一体化机装置

在分析了传统的太阳能热水器和太阳能吸附式空调制冷应用的基础上,提出了一种新型的太阳供热与制冷联合循环的新方案。通过模拟实验,证明了所提出新方案的可行性,从而使应用广泛的太阳能热水器与制冷空调相结合变成了现实,为太阳能的高效综合奠定了良好的基础。     

冷管型太阳能制冷系统

太阳能吸附式制冷作为一种绿色环保型的制冷技术具有良好的应用前景。本文分析了一种吸附床可直接吸收太阳能的、自身完成集热与制冷的玻璃管型太阳能吸附式制冷管,并介绍了以该冷管为基础的太阳能制冷系统。     

新型太阳能吸附式制冷系统研究

提出用玻璃材料（玻璃管）代替金属材料做太阳能吸附式制冷系统的太阳能集热器和吸附床,建立了一套该种系统的试验样机,并在实验里对样机进行了试验研究。试验数据和结果表明,该系统的运行可靠,证明以玻璃管（真空管）做太阳能吸附式制冷系统的集热器和吸咐床是可行的。     

太阳能驱动的吸附式制冷研究进展

太阳能驱动的吸附式制冷技术是一种能有效利用太阳能，且对环境友好的新型制冷技术。文章对太阳能驱动的吸附式制冷技术的研究现状进行了总结，并对进一步开展太阳能驱动的吸附式制冷系统的研究作了展望。     

太阳能制冷技术

夏季太阳辐射强天气炎热，人们渴望利用太阳能资源来制冷空调，下面介绍几种常用的太阳能制冷系统以飨读者。１物态变化过程中的能量转移物质在物态变化时能吸收或放出大量的热量。例如在一个标准大气压下，纯净水在１００℃开始沸腾，如果继续加热，水吸收热量后保持温度不变，水将由液态变为１００℃的水蒸汽（气态），在此条件下每千克水可吸收热量２．２５７MJ。相反的过程，１００℃的水蒸汽（气态）放出２．２５７MJ的热量后，就会变成１千克１００℃的水（液态）。这一热量称为汽化潜热。不同物质的汽化潜热是各不相同的。２液体吸…     

家用制冷设备制取热水装置

本文介绍了一种家用制冷设备制取热水装置，已申请实用新型专利。该装置用套管式冷凝器取代常见的风冷式冷凝器，利用冷凝热获得热水。     

Study on a solar-driven ejection absorption refrigeration cycle

This paper deals with a solar-driven ejection absorption refrigeration (EAR) cycle with reabsorption of the strong solution and pressure boost of the weak solution. The physical model is described and the corresponding thermodynamic calculation is performed with the working pair NH₃–LiNO₃. It is demonstrated that the EAR cycle has obvious advantages as compared with the conventional absorption refrigeration cycle: (1) the controllable high absorption pressure allows for substantially high coefficients of performance by the action of a liquid–gas ejector in which the low-pressure refrigerant vapour is injected and pressurized as a result of the ejection of high-pressure solution; (2) internal steady operation can be realized for refrigeration cycles driven by unsteady heat sources, especially for solar energy, by adjusting the power input consumed by solution pumps under the condition of economical and reasonable utilization of electric energy. © 1998 John Wiley & Sons, Ltd.     

太阳能溴化锂吸收式制冷技术的研究进展

介绍了太阳能澳化锂吸收式制冷循环的工作原理和系统构成,具体阐述了该制冷循环的几种典型结构,包括单效、双效、两级以及三效涣化锂吸收式制冷循环,分析了各种制冷循环的优缺点以及目前研究进展;进一步讨论了太阳能澳化锂吸收式制冷机组的性能特点受冷媒水出口温度、冷却水进口温度、加热蒸汽温度、污垢系数及不凝性气体等诸多因素的影响;提出了太阳能溴化锂吸收式制冷技术现存问题,最后指出,随着科学技术的发展和绿色建筑的兴起,太阳能溴化锂吸收式制冷将会有非常大的发展前景。     

太阳能喷射/压缩复合制冷循环性能研究

研究了一种太阳能喷射/压缩复合制冷循环,由太阳能集热子系统、喷射制冷子系统及压缩制冷子系统组成,系统充分利用热电两种能源以及两种制冷方法各自的优点,优化喷射制冷子系统工作性能的同时,改善压缩式子系统的工作条件,从而提高复合制冷循环性能的同时节约高品位电能。采用性能较好的高蒸发温度式喷射制冷带走压缩机排气余热具有实际意义。通过数值模拟的手段分析系统性能及其主要影响因素,并优化工作条件。研究表明,与相同工作条件下的单压缩制冷循环相比,复合制冷循环工作日全天候运行时电力性能系数提升约为31.5%,节电优势显著。存在一个最佳的喷射子系统蒸发温度使得复合制冷循环性能系数达到运行工况的最大值。     

太阳能双喷射式制冷系统性能计算分析

建立了双喷射式制冷系统的物理模型和数学模型,计算了太阳能双喷射式制冷系统中气体喷射器和气-液喷射器的性能参数、系统性能参数随制冷剂和工况的变化。结果表明,在给定的发生温度、蒸发温度、冷凝温度范围内,气体喷射器的喷射系数和系统COP均随发生温度和蒸发温度的升高而增大,随冷凝温度的增大而减小。气-液喷射器的喷射系数则随发生温度的升高而减小,除水外,均随冷凝温度的升高而减小。     

太阳能固体吸附式制冰机运行特性的实验及理论分析

对太阳能固体吸附式制冰机进行了大量的实验研究，实测出太阳能制冰机在外界不同太阳辐射能量下的性能特性。对太阳能固体吸附式制冰机进行了传热、传质数值计算，计算结果与实验吻合较好。用所建立的数学模型对太阳能制冰机进行了符合实际环境工况的性能分析，并对中国西部西藏地区气候资源条件下的太阳能制冷效果作了具体分析。研究工作从理论与实验相结合的角度较为客观地分析了太阳能制冰机实用化前景。     

Performance analysis of a refrigeration cycle using a direct contact evaporator

This research work studies an ice thermal energy storage having an injection of R12 refrigerant into the water to exchange heat directly. The water temperature decreases to the freezing point and ice is formed. The ice is used for creating chilled water for an air-conditioning purpose. The system consists of a compressor, a condenser, an expansion valve and a direct contact evaporator. This system has a capacity of approximately 2 tons of refrigeration. The system simulation created from the mathematical model of each component has been carried out. It was found that the performance of the system depends on two factors, the compressor speed and the mass flow rate of the refrigerant. The suitable conditions are 8–10 rps for the compressor speed and 0.04–0.06 kgs⁻¹ for the mass flow rate. The coefficient of performance is about 3·4–3·6 which is higher than that of the conventional system. © 1998 John Wiley & Sons, Ltd.     

Performance analysis of solar absorption-subcooled compression hybrid refrigeration system in subtropical city

Solar absorption-subcooled compression hybrid refrigeration system is a new type of efficient and economical solar refrigeration device which always meets the demand of cooling load with the change of solar irradiance. The performance of the hybrid system is higher due to the improvement of evaporator temperature of absorption subsystem. But simultaneously, the variation of working process as well as performance is complicated since the absorption and compression subsystems are coupled strongly. Based on the measured meteorological data of Guangzhou, a subtropical city in south China, a corresponding parametric model has been developed for the hybrid refrigeration system, and a program written by Fortran has been used to analyze the performance of the hybrid system under different external conditions. As the condensation temperature ranges from 38°C to 50°C, the working time fraction of the absorption subsystem increases from 75% to 85%. Besides, the energy saving fraction also increases from 5.31% to 6.02%. The average COP of the absorption subsystem is improved from 0.366 to 0.407. However, when the temperature of the absorption increases from 36°C to 48°C, the average COP of hybrid system decreases from 2.703 to 2.312. Moreover, the working time fraction of the absorption subsystem decreases from 80% to 71.7%. The energy saving fraction falls from 5.67% to 5.08%. In addition, when the evaporate temperature increases from 4°C to 14°C, the average COP of the absorption subsystem decreases from 0.384 to 0.365. The work of the compressor decreases from 48.2 kW to 32.8 kW and the corresponding average COP of the absorption subsystem is improved from 2.591 to 3.082.     

民用型太阳能制冰机的研究

在传统大阳能制冰机实验研究基础上，对1m^2的太阳能制冰机按产业化生产的技术要求进行了样机的设计与研发，所试制样机从外观要求，结构配置，系统操作上均克服了以往样机试验中的缺陷，使太阳能制冰机真正走入了产业化生产的流水线，所试制样机可直接进入市场。     

基于㶲损失分析的太阳能喷射制冷系统性能研究

利用?分析法对太阳能喷射制冷系统?损失随太阳辐射值的变化情况进行分析,了解系统各部件的?损失情况,给出系统总?损失随太阳辐射值变化的规律和系统各部件?损失占系统总?损失的比例随太阳辐射值变化的规律。结果表明:集热器?损失占系统总?损失的比例最大且随太阳辐射值的增加而减小,在太阳辐射值为500～1 100 W/m~2时,集热器?损失占系统总?损失的比例为79.28%～81.94%,因此提高集热器效率对降低系统?损失有着至关重要的影响。另外,由于喷射器固有结构的限制,随着发生温度的升高,喷射系数EER、系统性能系数COP并非一直增大,系统存在一个最佳的发生温度;控制发生温度在75℃时,随着太阳辐射值的增大,系统性能系数COP逐渐增大,在太阳辐射值达到600 W/m~2时逐渐变小。     

Performance of an adsorptive solar ice maker operating with a single double function heat exchanger (evaporator/condenser)

With the help of an experimental data base, the overall heat transfer coefficient of the double function heat exchanger (condenser/evaporator) of a novel adsorptive solar ice maker (ASIM) was estimated. The calculation shows that this parameter, which is required for simulation, is not constant during the adsorption–evaporation phase and that it is higher during the water freezing phase. With the help of a predictive mathematical model the operation of the studied ASIM was simulated and the results were analysed. They showed that with a consistent design of the different components of this machine the daily ice production could exceed 5.2 kg, with a COPs of more than 0.14. This value of the COPs is very interesting in comparison with those usually obtained from the ASIMs operating with separate condenser and evaporator, i.e. 0.08–0.2, according to the meteorological conditions or technologies.