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| 直接膨胀供液制冷系统性能可视化研究 | |
| 引用本文： | 刘旭升,臧润清,孙志利. 直接膨胀供液制冷系统性能可视化研究[J]. 低温与超导, 2011, 39(10): 47-52 |
| 作者姓名： | 刘旭升 臧润清 孙志利 |
| 作者单位： | 1. 天津制冷技术重点实验室,天津,300134 2. 天津商业大学制冷与空调工程系,天津,300134 3. 天津大学机械工程学院,天津,300134 |
| 摘 要： | 对直接膨胀供液制冷系统的传热性能进行了理论分析,建立了相应的数学模型.在保温体内对-5℃、0℃、5℃、10℃、15℃、20℃的工况进行了实验.分别测得制冷系统的压力、风量、制冷量、及功耗等技术参数,得到在环境温度一定的情况下的传热系数和制冷量的变化关系.并对蒸发器内制冷剂流动状态进行观察.实验表明:直接膨胀供液制冷系统... |
| 关 键 词： | 直接膨胀供液 传热系数 流动状态 |
The visualization experiment in supply liquid refrigerant for evaporator by direct expansion |
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| Liu Xusheng,Zang Runqing,Sun Zhili. The visualization experiment in supply liquid refrigerant for evaporator by direct expansion[J]. Cryogenics and Superconductivity, 2011, 39(10): 47-52 | |
| Authors: | Liu Xusheng Zang Runqing Sun Zhili |
| Affiliation: | Liu Xusheng1,Zang Runqing2,Sun Zhili3 (1.Tianjin Key Laboratory of Refrigeration Technology,Tianjin 300314,China,2.Department of Refrigeration & Air Conditioning Engineering,Tianjin University of Commerce,Tianjin 300134,3.School of Mechanical Engineering,Tianjin University,Tianjin 300072,China) |
| Abstract: | The heat transmission performance of the evaporator in recirculation was analyzed and the corresponding mathematical model was established in the paper.Through determining the parameters of temperature,pressure,air volume and waste work under different operating mode in the enthalpy difference laboratory to-5℃、0℃、5℃、10℃、15℃、20℃,the changing rules of the evaporating temperature,and the refrigerating capacity of the systems in certain outdoor dry bulb temperatures of the refrigeration systems with supply liquid refrigerant for the evaporator by gravity and direct expansion were obtained.And the state flowing of refrigerant in evaporator was observed.The experiment indicates that in the refrigeration system of direct expansion,the refrigerant has underwent undulating flowing,more severe undulating flowing,unsymmetrical annular flowing and symmetrical annular flowing. |
| Keywords: | Direct expansion for the fluid Heat transfer coefficient Flow state |
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