最新刊期
      卷 32 ， 期 2 ， 2011
      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.001
        摘要：Based on the weather conditions in hot and humid area,and present problems of house air-conditioners in this region,a novel residential temperature-humidity independent control air-conditioner was designed to remove the indoor sensible heat load and latent heat load separately,which could enhance the indoor thermal comfort and energy efficiency.The experiments were carried out in the enthalpy difference lab and its SEER(3.932) and the influence of five factors based on orthogonal method,including outdoor ai...  
        关键词：pyrology;HVAC;Temperature-humidity independent control;Performance experiment study;dehumidification capacity;refrigeration capacity   
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        发布时间：2024-08-02
      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.009
        摘要：In order to solve the present situation of unceasing demand for hot water and severe loss of quantity of heat from wastewater,a new type of heat pump water heater was developed based on heat recovery of domestic wastewater.In this paper,the relation curves of waste heat recovery of combined separate heat pipe evaporator,average heating capacity of heat pump,power of compressor,suction and discharge pressure of compressor,outlet temperature of hot water,and energy efficiency ratio of system are investigated ...  
        关键词：Pryology;Domestic wastewater;heat pump;water heater   
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      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.014
        摘要：Heat pipes have been used widely in many engineering fields due to their higher rate of heat transfer.However,the design of heat pipes often involves selection of multiple parameters and the conventional design algorithms are not efficient in optimizing these parameters simultaneously.In this paper,the thermal network model and heat transfer limit model of a typical heat pipe were built.Based on them,the optimal problem of the heat pipe is defined mathematically.Then a multi-object optimization algorithm ba...  
        关键词：pyrology;heat pipe;Heat conductivity;thermal resistance;optimal design;Multi-object genetic algorithm   
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        发布时间：2024-08-02
      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.023
        摘要：A 6kW window type air conditioner prototype with 6-pass microchannel condenser was developed and investigated experimentally under T1 standard,T3 standard and T3 maximum operating conditions.The result showed that under T1 standard operating condition the new developed prototype performed better than the one with traditional finned copper round tube heat exchanger: 254W(about 4.27%) higher in refrigerating capacity,204W less in input power and 12.32% higher in EER(i.e.,2.28),which revealed better performanc...  
        关键词：pyrology;Experiment;Microchannel condenser;Window type air conditioner   
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      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.027
        关键词：pyrology;Stirling refrigerator;Cryogenic refrigerator;Design research   
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      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.030
        摘要：Charging characteristic of TEV temperature sensing bulb is one of the most affective factors of TEV performance.Refrigeration systems are often unstable because of bulb pressure fluctuations caused by oscillation of back air temperature of compressor.Temperature and pressure characteristics of TEV bulb with adsorption filler in R410a system was studied.It was found that adsorption filler increase the time constant of pressure change caused by bulb temperature rising and the dimension of adsorption filler de...  
        关键词：engineering thermophysics;thermal expansion valve;Bulb;Adsorption filler;Time constant;hunting   
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      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.035
        关键词：Package and preservation of food;Vacuum pre-cooling;Chinese little greens;Texture;Chromatic aberration;POD   
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        发布时间：2024-08-02
      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.039
        摘要：In this paper,the current status of numerical simulation on display cabinets and air curtains are introduced,including the mathematical models,CFD software,model simplification,boundary conditions.The existing problems of current researches are pointed out,and suggestions for further researches of display cabinets are presented.  
        关键词：pyrology;display cabinet;review;air curtain;numerical simulation   
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      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.045
        摘要：ince VCE-15 vacuum pre-cooling machine can be influenced by the air conditions in the vacuum chamber,the opening-time of vacuum is delayed,resulting in the prolonging of cooling period.Based on the cooling load,the computational formula for delayed-opening time was deduced,and verified by the experimental results.It is shown that,the delayed-opening time is usually less than 5 minutes,prolongs with the increase of temperature,relative humidity or no load ratio in the vacuum chamber,and shortens with the inc...  
        关键词：pyrology;Vacuum pump;Delayed-opening;Vacuum pre-cooling   
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      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.050
        摘要：In order to study melting and solidification temperature range of thermal storage material sodium acetate trihydrate in the energy storage project,melting experiments under different bath temperatures and solidification experiments under different cooling were implemented,and related parameters of phase change heat storage properties were obtained.The experimental results show that the supercooling degree of thermal storage material has an increasing trendency when the heating bath temperature decreases.The...  
        关键词：engineering thermophysics;Thermal storage material;Sodium acetate trihydrate;supercooling degree;Phase change property   
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      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.054
        摘要：In this paper,the low-field NMR and MRI techniques were used to study the moisture distribution of the cooked bean products cooled by vacuum cooling.Results showed the transferring process of bound water,adsorption water and free water in the cooked bean products after vacuum cooling.Among them the bound water is relatively stable,the adsorption water and free water decrease significantly.The moisture content reduced after the vacuum cooling,which was reflected in the magnetic resonance imaging map,i.e.,pro...  
        关键词：Packge and preservation of food;nuclear magnetic resonance;Moisture-distribution;vacuum cooling;Cooked bean product   
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        发布时间：2024-08-02
      • Vol. 32, Issue 2, (2011) DOI: 10.3969/j.issn.0253-4339.2011.02.058
        摘要：To solve the switching on and off repeatedly and high energy consumption of the refrigeration unit in blood transport vehicles,the arrangement of energy storage tube of copper foam phase-change material(PCM) in the duct was put forward.The experiment on the thermal storage tube was conducted,and the temperature-time variation curve of the tube was obtained.By establishing the corresponding mathematic model and physical model for the thermal storage tube and the duct in the blood transportation vehicle,the p...  
        关键词：Engineering ghermophysics;phase change material;Copper foam;numerical simulation;Phase change energy storage;Blood transportation vehicle   
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