最新刊期
      卷 31 ， 期 2 ， 2010

      • Experiment on Performance of Solar Adsorption Air Conditioning

        Lu Zisheng Wang Ruzhu Xia Zaizhong Dai Yanjun Lu Xiurui Yang Chuanbo
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.001
        关键词：pyrology;solar;silica gel;water;adsorption;air conditioning   
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      • Modulating Technology for Scroll Compressor with Refrigerant Release

        Wang Baolong Han Linjun Shi Wenxing Li Xianting
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.007
        摘要：The inner volume efficiency of constant-volume-ratio compressors declines fast when the difference between indoor temperature and outdoor temperature decreases,especially for the refrigeration(heat pump) systems used in air-conditioning,leading to the poor performance of these systems.In addition,with the decrease of the compression ratio,the heating/cooling requirement drops,but the heating/cooling capacity of the refrigerating system rises.In our research,a novel scroll compressor refrigeration system wit...  
        关键词：pyrology;scroll compressor;Refrigerant release;simulation   
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      • Chen Xu Fan Rui Long Weiding Ma Hongquan
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.011
        摘要：In this paper,the numerical simulation is performed on the basis of the model describing heat transfer for single U-tube BHE(Borehole Heat Exchanger),and a single regression analysis and a multiple regression analysis on the heat exchange rate are conducted using the SPSS software.The influence of subsoil thermophysical property,groundwater velocity,dimension of BHE,heat exchanger fluid,and operational condition on the heat exchange rate is discussed.Both the linear and non-linear single regression techniqu...  
        关键词：engineering thermophysics;Transferring heat per unit of borehole depth;Single regression analysis;Multiple regression analysis   
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      • Sun Jian Hu Peng Fu Lin
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.017
        摘要：The absorption heat pump technology has been an important building energy-saving technology due to its effective utilization of low-grade heat energy and electrical energy saving.The absorber performance is mainly determined by heat transfer and mass transfer coefficients of tubes which are directly influenced by falling film distribution on the surface of heat transfer tubes.The liquid distributor is a critical part for realizing falling film.In this research,four liquid distributor samples with different ...  
        关键词：pyrology;absorption heat pump;Falling film;Liquid distributor;Flow-rate coefficient   
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        更新时间：2025-02-26

      • Investigation on Air-flow Field for Medium/large Size Air Source Heat Pump

        Gong Jianying Yuan Xiuling Lv Baocheng
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.022
        摘要：The airflow field of the heat exchanger at the air side of an air source heat pump heater/chiller was studied by using the CFD software.The numerical results were validated by the experiments.The influence of the intersect angle on the airflow field was discussed in details.The results show that the face velocity distribution along the heat exchanger height was more non-uniform and the airflow field was determined by the heat exchanger construction.The maximum air velocity moved downwards along the heat exc...  
        关键词：pyrology;air source heat pump;V-type fin tube heat exchanger;Air velocity distribution;Intersect angle   
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        更新时间：2025-02-26

      • Model Investigation of Jet Flow Inside Two-phase Ejector

        Chen Liang Liu Jinghui Chen Jiangping Chen Zhijiu
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.026
        摘要：The jet flow development inside an ejector in a compression/ejection refrigeration cycle was investigated.The flow processes along the flow path inside the ejector were modeled including pressure adjustment,jet mixture,equalization,and diffusion.The computing results are well consistent with the experimental data.The entrainment ratio,outlet pressure,and energy-saving effect increase with the increase in condensing temperature in the compression/ejection refrigeration cycle.Moreover,there is an optimum evap...  
        关键词：Power machinery and engineering;Two-phase ejector;Compression and ejection refrigeration cycle;Nozzle;Jet flow   
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        更新时间：2025-02-26
      • Tu Qiu, Feng Zhiping, Dong Kaijun, Feng Yuhai Mao Shoubo Guo Defang Tang Sheng Pang Peng
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.032
        摘要：A 16 HP fresh air processor(FAP),a large capacity indoor unit matching a variable refrigerant flow(VRF) outdoor unit,was developed.In the processor,an optimization design model of variable target condensation temperature is adopted to control the capacity output of the compressor,and the air outlet temperature is controlled by regulating the opening of an electronic expansion valve(EEV).The heat transfer correction factor in the model is determined by experiments.The experiment shows that this control strat...  
          
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      • Zang Runqing, Sun Zhili Wang Hongxu
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.039
        关键词：pyrology;Thermostatic expansion valve;air-conditioner;Match relationship   
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        更新时间：2025-02-26

      • Experimental Study on Characteristics of A New Cryopreservation Apparatus

        Yang Ge Zhang Shaozhi Chen Guangming Yu Xiaoyi Wu Dongbo
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.043
        摘要：The authors developed a new cryopreservation apparatus for the long-term preservation of biomaterials which incorporates auto-cascade refrigeration,automatic control and the liquidus-tracking method.The experiments for cooling and warming with variable concentration were conducted under the control of programs with three common cryoprotectants separately including glycerol,propylene glycol and dimethyl sulfoxide.The final solution concentration arrived at the critical concentration for vitrification and the...  
        关键词：pyrology;cryopreservation;vitrification;Biomaterials;Apparatus   
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      • Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.048
        关键词：Package and storage of food;Fresh cod(Gadus Morhua) fillets;Slurry ice;pre-cooling;Superchilled storage;sensory;Eating quality.   
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      • Zheng Lijing Guan Zhiqiang Li Min
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.053
        摘要：An experiment was conducted with the parameter adjustment of two-time poikilothermia and one-time variable pressure process during freezing and drying process for the adductor muscle of Chlamys Farreri.The result shows that the center temperature of the material would influence the rehydrate rate and the energy consumption of the freezing and drying sample when the temperature was changed at the first time.If the first temperature adjustment was performed,the sample rehydrate rate and the rehydrate speed of...  
        关键词：food processing technology;Chlamys Farreri;Mutative temperature;Transformation;Residual water content;Rehydration rate;energy consumption   
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        更新时间：2025-02-26

      • Experimental Study on Air-conditioning Plant with Space Radiative Cooling

        Rui Zhigang Zuo Ran
        Issue 2, (2010) DOI: 10.3969/j.issn.0253-4339.2010.02.057
        摘要：In this study,the principle and the method of radiative cooling were stated.The emissivities of black carbon powder,NaCl crystal,TiO2 powder,PET film and PTFE film were measured using an infrared emission detector.The transmittance of LDPE film to several materials was obtained by using theoretical derivation combined with experimental measurement.The experiment for static and continuous airflow was conducted.The results show that by using PET film and PTFE film as the radiators,the temperature difference b...  
        关键词：pyrology;Radiative cooling;Emissivity;Transmissivity;PET film;PTFE film   
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