急速冷冻箱制冷性能实验研究

TB61+1%TB657; 针对食品急速冷冻箱的制冷系统进行实验,研究其降温曲线及制冷性能.实验结果表明,目前的食品急速冷冻箱制冷系统在开始降温后,蒸发温度立刻降至接近最低蒸发温度,蒸发器进口温度和被冷冻水温度温差约为25℃,蒸发温度过低导致进入压缩机的制冷剂流量偏小,压缩机的实际功率只占额定功率的60％左右,系统的(炯)损主要发生在蒸发器内(约占41％),因此使蒸发温度与箱温匹配是提高急速冷冻箱降温速度的重要手段....

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Bibliographic Details
Published in制冷学报 Vol. 37; no. 4; pp. 27 - 32
Main Author 陈肖依 刘金平 许雄文
Format Journal Article
LanguageChinese
Published 广东省能源高效清洁利用重点实验室华南理工大学 广州510640 2016
华南理工大学电力学院 广州510640%华南理工大学电力学院 广州510640
Subjects
制冷性能
实验研究
急速冷冻箱
蒸发温度
quick freezer
experimental research
refrigeration performance
实验研究
急速冷冻箱
evaporating temperature
制冷性能
蒸发温度
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ISSN0253-4339
DOI10.3969/j.issn.0253-4339.2016.04.027

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Summary:TB61+1%TB657; 针对食品急速冷冻箱的制冷系统进行实验,研究其降温曲线及制冷性能.实验结果表明,目前的食品急速冷冻箱制冷系统在开始降温后,蒸发温度立刻降至接近最低蒸发温度,蒸发器进口温度和被冷冻水温度温差约为25℃,蒸发温度过低导致进入压缩机的制冷剂流量偏小,压缩机的实际功率只占额定功率的60％左右,系统的(炯)损主要发生在蒸发器内(约占41％),因此使蒸发温度与箱温匹配是提高急速冷冻箱降温速度的重要手段.
Bibliography:11-2182/TB
quick freezer; refrigeration performance; evaporating temperature; experimental research
The experiment of quick freezer＇s refrigeration system is carried out to study it＇s cooling curve and refrigeration performance. The experimental results show that： when the refrigeration system of the quick freezer begins to cool down, the evaporation temperature is dropped immediately to be close to the lowest evaporation temperature and the evaporator＇s inlet temperature has a difference with water＇s temperature about 25 ℃ ; the lower evaporating temperature leads to the smaller mass flow rate of refrigerant entering the compressor, and compressor＇s power accounts for only about 60% of the rated power; the exergy loss is about 41% in the evaporator, thus to make the evaporation temperature match with the indoor temperature of quick freezer is an important means to increase the freezer＇s cooling speed sharply.
Chen Xiaoyi, Liu Jinping, Xu Xiongwen （1. School of Electric Power, South China University of Technolog
ISSN:0253-4339
DOI:10.3969/j.issn.0253-4339.2016.04.027