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。     

太阳能固体吸附式制冰机不同吸附工质对的实验研究

在构建的太阳能制冰机的基础上，选用活性炭-甲醇、活性炭-乙醇作为吸附制冷工质对，在外界环境条件及辐射能量条件相同的条件下，分别对两种不同的吸附制冷工质对进行解吸量、吸附量和制冰量的实验。通过对大量实验数据的分析与整理，所得出的结论是：对固体吸附式制冰机装置而言，活性炭-甲醇工质对仍是最佳的吸附制冷工质对，活性炭-乙醇工质对不适合于太阳能固体吸附式制冰机中。     

太阳能固体吸附式制冰机系统内外特性分析

利用所建立并通过实验证的数学模型，从吸附床的内部特性参数及外部特性参数出发，对所设计制造的太阳能平板式制冰机系统进行分析，较为全面而系统地分析了内部参数及外部参数的改变对太阳能固体吸附式制冰机的性能系统COP及制冰特性的影响，为新一轮的太阳能固体吸附式制冷机装置的设计与制作提供了一个全方位的优化设计基础。     

太阳能固体吸附式制冷系统部件的实物设计

对太阳能固体吸附式制冰机系统的关键零部件吸附床、冷凝器、蒸发器加以分析,并进行了实物设计。实验结果表明,所设计的系统零部件在太阳能固体吸附式制冰机装置实际运行工况下具有较好的传热、传质特性,系统各子部件间运行时能够很好地匹配,为太阳能制冷空调的实用化奠定了良好的基础。     

两种太阳能制冷装置性能分析与比较

在进行了太阳能热水器－冰箱复合机及平板式太阳能制冰机装置的设计及多次实验后，对这两种固体吸附式制冷系统装置性能进行了综合分析与比较。     

平板式太阳能固体吸附式制冰机的设计

设计了一台以太阳能为驱动源的固体吸附式制冰机，并对该装置进行了性能实验，实验结果表明，该装置具有较好的传热传质特性，并有效地解决了系统的真空泄漏问题，系统各子部件之间匹配性能良好，多次重复运行得到相同的实验结果。     

太阳能固体吸附式制冷技术应用的一些探讨

总结了自行设计的太阳能固体吸附式制冷装置所取得的一些成果,对太阳 能固体吸附式制冰机系统的实际应用从工艺上、操作上、成本上作了分析与说明,并对 进一步开展太阳能固体吸附式制冷装置的研究作出了展望。     

太阳能固体吸附式制冰机热动力学性能分析模型及实验

分析了太阳能固体吸附式制冷装置中吸会床的传热传质计算过程，给出了求解模型的具体方法，运用数值传热学的方法，计算了在一定日照国徽能量条件下，系统装置的吸附床内的温度场分布，实验表明，所建立的模型能对太阳能固体吸附式制冷装置进行了性能动态模拟，为系统装置的优化设计提供了参考。     

小型固体吸附式太阳能空调装置的实验研究

根据小型太阳能空调装置的要求和特点,对固体吸附式太阳能空调系统进行了实验研究。通过对装置运行工况的具体分析,选择硅胶水作为吸附剂与制冷工质,介绍了集热／再生器、空冷冷凝器和蒸发器的结构设计。在此基础上,建立了小型固体吸附式太阳能空调实验装置,并对整个系统的运行性能进行了一系列的实验研究。结果表明,采用硅胶水工质的小型吸附式太阳能空调装置进行间歇式空调,在技术上是可行的,为进一步研究性能的优化提供了依据。     

太阳能固体吸收式制冰机

太阳能固体吸收式制冰机张建国太阳能致冷技术能有效地利用太阳能，节省常规能源，无环境污染，因而越来越受到人们的重视。太阳能致冷系统有多种类型，如太阳能吸收式致冷系统、太阳能吸附式致冷系统等。它们是纯热力系统。还有一些太阳能致冷系统采用动力循环，首先将太...     

Study on intermittent refrigeration phenomenon for solar solid adsorption refrigeration

A valveless solar solid adsorption ice maker has been used for carrying out experiments under real solar radiation intensity conditions. Different performance variations of the solar ice maker are obtained under the effect of sky cloudy cover. The experimental results indicated that the performance of the solar ice maker was severely affected by the sky cloudy cover, and no ice would be obtained if cloudy conditions prevailed for intervals exceeding 3 h. A heat and mass transfer model validated by the experiments has been used to analyze intermittent refrigeration phenomenon of solar solid adsorption refrigeration. The performance variation due to the effecting of sky cloudy cover has also been demonstrated by simulated results. The analysis of both experimental and simulated results has provided an objective climate resource choice which could be available now in applications to solar solid refrigeration, it also has made a scientific analysis method for solar solid adsorption ice maker application.     

A study of thermal decomposition of methanol in solar powered adsorption refrigeration systems

To study the long-term performance reliability of a solar powered carbon/methanol ice maker, an investigation of thermal decomposition of methanol on the alloy's surface under solid adsorption refrigeration conditions has been carried out at Monash University. The indoor simulation showed that the thermal decomposition of methanol did occur in the normal solar powered adsorption refrigeration system. Dimethyl-ether and methoxymethyl methyl ether, etc. were found in the decomposition products. The rate of the decomposition depends on the presence of various alloys. These decomposition products (unwanted gases) may be one of the main reasons for the diminishing performance of the solar ice maker. The impact of the unwanted gases on the ideal solar powered solid adsorption refrigeration cycle is also discussed in this paper.     

Experimental study on adsorbent of activated carbon with refrigerant of methanol and ethanol for solar ice maker

Two different working pairs, one of them activated carbon–methanol and the other activated carbon–ethanol, are used in a solar ice maker to determine ice production and refrigerant criteria in desorption and adsorption processes under similar radiation energy and environmental conditions. Experimental results show that ice can be produced with activated carbon–methanol, however, ice could not be obtained with the use of activated carbon–ethanol using the same solar ice maker with similar environments and radiation intensities. Further experiments have shown that the adsorbing and desorbing refrigerant amounts of the two working pairs gave quite different results, the activated carbon–methanol has proven to be the superior one of the two working pairs in ice production of solar adsorption refrigeration.     

Experimental study on dynamic performance analysis of a flat-plate solar solid-adsorption refrigeration for ice maker

A flat-plate solid-adsorption refrigeration ice maker has been built for demonstration purposes. The working pair consists of methanol used as the refrigerant and activated carbon as the adsorption medium. The adsorbent bed is constructed of two flat-plate collectors, with a total surface area of 1.5 m². Solar radiation can be simulated with quartz lamps and some important parameters such as temperature and pressure of each subsystem can be handled by a computer. The experimental results show that this machine can produce 4–5 kg of ice after receiving 14–16 MJ of radiation energy with a surface area of 0.75 m², while producing 7–10 kg of ice after receiving 28–30 MJ of radiation energy with 1.5 m². These are the most advanced results for a solar ice maker so far. All these successful achievements will speed up the commercial processing of a solar ice maker.     

An energy efficient hybrid system of solar powered water heater and adsorption ice maker

A new hybrid system of solar powered water heater and adsorption ice maker has been proposed. The working principle of the combined cycles of solar refrigeration and heating is described, theoretical simulation to the thermodynamic processes has been made. Experiments have been performed in a developed prototype hybrid system; it is verified that the hybrid system is capable of heating 60 kg water to about 90°C as well as producing ice at 10 kg per day with a 2-m² solar collector.     

Year round test of a solar adsorption ice maker in Kunming,China

A solar adsorption ice maker with activated carbon–methanol adsorption pair was developed for a practical application. Its main features include utilization of a water cooled condenser and removing all valves in the refrigerant circuit except the one that is necessary for refrigerant charging. Year round performance tests of the solar ice maker were performed in Kunming, Yunnan Province, China. Test results show that the COP (coefficient of performance) of the solar ice maker is about 0.083–0.127, and its daily ice production varies within the range of 3.2–6.5 kg/m² under the climatic conditions of daily solar radiation on the surface of the adsorbent bed being about 15–23 MJ/m² and the daily average ambient temperature being within 7.7–21.1 °C. The suitable daily solar radiation under which the solar ice maker can run effectively in Kunming is above 16 MJ/m².