带施香,消臭,杀菌功能的节能型家用空调器的研制

作者采用微机优化设计程序得出了空调器各部件参数，并经实验确定了各部件的匹配及有关的最佳参数，所研制的三种系列空调器能效比（ＥＥＲ）分别达到了３．２７，３．１４，３．４０。该空调器还具有独特的施香和紫外线杀菌功能。     

水－水活塞压缩式热泵机组的性能测试

本文介绍了一个热泵实验室的实验装置和试验方法，对以Ｒ－２２为工质的机组长期观察和测试的结果，以及制热和制冷系数的计算公式，提出了作者的分析和建议     

替代R－22和R－502的HFC混合工质最新进展

替代Ｒ－２２和Ｒ－５０２的ＨＦＣ混合工质最新进展最近，美国四家制冷剂生产大公司，经过广泛研究，据称已经取得了替代Ｒ－２２和Ｒ－５０２的最佳ＨＦＣ混合工质，并且看来，有排除用单一工质作为替代品的趋势。这四家公司是：联合公司（ＡｌｌｉｅｄＳｉｇｎａｌＩｎ...     

HFC32／HFC152a应用于家用空调器的模拟计算及试验研究

介绍了家用空调器应用对环境无危害的ＨＦＣ３２／ＨＦＣ１５２ａ非共沸混合工质的模拟计算及试验研究情况。通过理论计算和大量的测试表明，ＨＦＣ３２／ＨＦＣ１５２ａ和ＨＦＣ２２很有希望的一种替代制冷剂，其空调器能效比较采用ＨＦＣ２２提高１８．１％，为研制无公害的节能型家用空调器提供了理论及实践基础。     

水—水活塞压缩式热泵机组的性能测试

本文介绍了一个热泵实验室的实验装置和试验方法，对以Ｒ－２２为工质的机组长期观察和测试的结果，以及制热和制冷系数的计算公式，提出了作者的分析和建议。     

HRV空调器的特性及应用

介绍了ＨＲＶ空调器的结构特性、运行及与ＶＲＶ联合运行的几种方式，并作了经济性比较。结合某联合ＶＲＶ系统运行的工程实例指出，ＨＲＶ可作为一种节能的新风空调器使用。     

VRV多联空调系统的合理选用

对一座未设空调的现有建筑经方案对比确定采用房用空调器加ＶＲＶ空调系统，提出了合理选用ＶＲＶ系统的一个方法，简要介绍了相应的设计计算和控制。     

家用组合体空调器若干技术问题的研究

根据市场需求，研制开发了一种家用组合体空调器，这种空调器有室内机和室外机，由室内机接出风管将空气送到各空调房间，房间内可根据需要任意调节风量。对空调器的节流机构运行、双压缩机联合运行、快速除霜等进行了试验，并评价了储液器与汽液分离器的综合效果，给出了有关设计和试验数据，对实验现象进行了分析。     

一机多挂式空调器中制冷剂的控制及分析

本文分析了制冷剂需要量、制冷剂分配及节流量等对一拖二式空调器在不同运行工况，不同制冷负荷的影响特征，提出了控制制冷剂的原则、方法和实验结果，文中的分析方法和实验结果对一机多挂式空调器着普遍意义，同时对其它（如变容量）空调器也有一定的实用价值。     

蓄冷和热水器复合空调器的实验研究

提出了一种蓄冷和热水器复合空调器装置。蓄冰槽可以与分体空调器直接连接，利用低谷电蓄冷，供冷时利用蓄冷槽提高机组运行的过冷度，改善机组的运行效果。放冷结束后，蓄冰槽可转换成水冷冷凝器，回收冷凝热量，提供生活热水。通过对普通空调器改造的样机进行实验研究，复合机组夏季各项功能均成功实现，同原来空调器相比，复合机组制冷量平均增加28．2％，性能系数平均增加21．5％。     

Performance investigation of ozone-friendly R404A and R507 refrigerants as alternatives to R22 in a window air-conditioner

In this study, experimental research was carried out to investigate the performance of R22 and its ozone-friendly alternative refrigerants (R404A and R507) in a window air-conditioner. The performance parameters of the system using R22 were considered as benchmarks and those obtained using alternative refrigerants were compared. Experimental results showed that R22 had the lowest pressure ratio and discharge temperature closely followed by R507. The average discharge temperature obtained using R507 and R404A were 4.2% and 15.3% higher than that of R22, respectively. The lowest compressor power and energy consumption were obtained from R507 retrofitted system. Also, the highest refrigeration capacity and coefficient of performance (COP) were obtained using R507 in the system. The average refrigeration capacities of R507 and R404A were 4.7% higher and 8.4% lower than that of R22, respectively, while the average COP of R507 increased by 10.6% and that of R404A reduced by 16.0% with respect to that of R22. Generally, the investigation has revealed that R507 can be used successfully as a retrofitting refrigerant in existing window air-conditioners originally designed to use R22 in the event of HCFC phased out.     

Performance studies of R433A in a direct expansion solar-assisted heat pump

ABSTRACT

Energy assessment of a simple direct expansion solar-assisted heat pump system has been experimentally assessed with R433A as a possible alternative to R22. An artificial neural network integrated genetic algorithm model was developed to assess the performance system. The data obtained from the experimentation at different ambient conditions are used as the training data for the ANN network. The back propagation learning mechanism with variants Lavenberg-Maguardt with 20 neurons in the hidden layer were used in modelling of ANN. The values obtained from the analysis using ANN are optimised further by integrating the ANN procedure with GA. The results indicated that R433A has 6.4% and 1% lower instantaneous compressor power consumption and heating capacity compared to R22. Energy performance ratio of R433A was found to be about 5.67% higher compared to R22. The results confirmed that R433A can be used as a possible alternative to R22 DX-SAHP systems.     

R410A与R22在家用空调中的应用比较(1)

R410A不破坏臭氧层,是一种可以长期替代R22的绿色环保制冷剂,现已在家用空调中得到日益广泛的应用。本文分别对R410A与R22的热力性能,对4台具有可比性的R410A与R22空调的系统性能即制冷量和能效比进行比较考察,结果表明R410A具有良好的热传递与流动特性,有利于减少空调换热器尺寸、提高系统运行效率。     

替换R290的热泵型空调器供暖实验研究

为探讨热泵型空调器更换R290后的供暖特性,在重庆地区开展了供暖工况下充注R290空调器与原R22空调器的对比实验,测试了空调器的送回风温湿度、耗电量、风量等数据。研究了两组空调器的送回风温湿度差异及与室外温度变化的关系,比较了2台空调供热量、耗电功率及COP等数据。结果表明:在重庆地区热泵型空调中替代充注R290后,空调器制热效果良好,室内空气温湿度与原空调器处理的空气温湿度较为接近;但由于制冷剂质量流量减小,平均供热量降低14.6%;尽管COP整体降低了7.5%,但在运行稳定后COP能接近原空调器。     

R410A与R22在家用空调中的应用比较(2)

本文部分（2）利用Bin参数分析法对R410A与R22空调的全年运行耗电进行计算,采用寿命期气候性能（LCCP）指标对R410A与R22的温室效应总体影响进行考查,同时对R410A与R22空调的生产成本进行比较。结果表明R410A空调由于运行效率高,在使用过程中可以显著节约耗电和运行费用,而且随着原材料价格的上涨和R410A压缩机生产能力的扩大,R410A与R22空调具有相近的生产成本;同时,通过减小温室间接效应以及空调的制冷剂充灌量或泄露量,与R22相比,R410A反而还会有利于降低对气候变暖的影响。     

预冷式风冷空调机组理论与实验研究

设计了直接蒸发预冷式空调机组。对碳氢制冷剂R1270进行了实验研究,分析其在风冷空调机组中替代R22的可行性。结果表明:通过直接蒸发预冷不仅能提高机组COP,还能降低机组的排气温度。另外在相同条件下,R1270充注量为R22系统的47.1%,在额定工况下,R1270的制冷量大于R22系统,当室外环境温度升高时,R1270的制冷量略小于R22系统;二者COP值基本一致,但R1270排气温度明显低于R22。因此,从制冷能力上看,R1270作为R22的替代工质是一种较好的选择。特别是常规空调机组采用直接蒸发预冷后,在高温环境条件下,R1270的COP高于R22。     

A thermodynamic analysis of a transcritical cycle with refrigerant mixture R32/R290 for a small heat pump water heater

In this study, a thermodynamic analysis on the performance of a transcritical cycle using azeotropic refrigerant mixtures of R32/R290 with mass fraction of 70/30 has been performed. The main purpose of this study is to theoretically verify the possibility of applying the chosen refrigerant mixture in small heat pumps for high temperature water heating applications. Performance evaluation has been carried out for a simple azeotropic mixture R32/R290 transcritical cycle by varying evaporator temperature, outlet temperature of gas cooler and compressor discharge pressure. Furthermore, the effects of an internal heat exchanger on the transcritical R32/R290 cycle have been presented at different operating conditions. The results show that high heating coefficient of performance (COP_h) and volumetric heating capacity can be achieved by using this transcritical cycle. It is desirable to apply the chosen refrigerant mixture R32/R290 in small heat pump water heater for high temperature water heating applications, which may produce hot water with temperature up to 90 °C.     

采用单压缩机与双压缩机的多联式空调机组的性能比较

实验比较了单压缩机和双压缩机多联式空调机组的能效比和综合部分负荷性能系数,结果表明,采用定速压缩机和变频压缩机并联的双压缩机空调机组的平均能效比为3.6W/W,综合部分负荷性能系数为3.67;而单压缩机空调机组的平均能效比和综合部分负荷性能系数分别为3.1W/W和3.21;双压缩机空调机组有较好的节能效果。     

The effects of roof reflectance on air temperatures surrounding a rooftop condensing unit

Recent anecdotal information suggests that “cool” roofs might produce significant energy savings by reducing the temperature of air entering rooftop air-conditioner (RTU) condensers. Unfortunately, measurements to support this claim are not well documented. To overcome this problem, we carried out a set of six rigorous field experiments to determine the effects of roof reflectance on the heating of condenser inlet air by the roof, and to assess the effects of condenser fan operation on the potential recirculation of hot discharge air from the condenser. The experiments involved combinations of two roof conditions (a “hot” roof and then the same roof with a “cool” coating) and three RTU operation modes (condenser fan and compressor both operating, condenser fan operating without the compressor, and condenser fan and compressor both not operating). For each case, we continuously measured outdoor air temperature at 26 locations near and far from the RTU, as well as roof surface temperatures at 2 locations (1 near and 1 far from the RTU), wind speed and direction, and solar radiation.