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凡是有蒸汽源的地方,制冷温度在5～20℃范围内,采用蒸汽喷射制冷机制冷是比较合理的。跟其他机械压缩制冷机与吸收式制冷机相比,蒸汽喷射制冷机的投资与维护费用较低,制造、操作与维修比较简单,设备的可靠性高,安全性好,使用寿命较长。但是目前工业生产上已有的几类蒸汽喷射制冷机由于存在以下两大问题而影响普遍推广。 1)操作蒸汽压力太高,国内外普遍采用5～7kgf/cm~2的蒸汽压。从热效率来看,几乎蒸汽压力愈高,愈经济。但是我国许多
Where there is a steam source, the cooling temperature in the range of 5 ~ 20 ℃, the use of steam jet refrigeration is more reasonable. Compared with other mechanical compression chillers and absorption chillers, the cost of investment and maintenance of the steam jet chillers is relatively low. The manufacture, operation and maintenance are relatively simple, the reliability of the equipment is high, the safety is good, and the service life is long. However, there are several types of steam jet chillers currently in industrial production that have a widespread impact on the two major issues. 1) Operating steam pressure is too high, generally 5 ~ 7kgf / cm ~ 2 vapor pressure at home and abroad. From the thermal efficiency point of view, the higher the steam pressure, the more economical. But many of my country