refrigerated showcase display cases Interpretation of walk-in cooler shell and tube regenerators how to operate?
refrigeration systems, the liquid supply pipe and the return gas pipe are often tied together or welded together to form the simplest regenerator. The choice of
regenerator must meet two conditions:
First, the gas flow rate in the shell should be 8~12m/s (too low flow rate will make lubricant deposit in the shell)
Second, the heat transfer area should be able to meet the requirements Set working conditions.
evaporation-condenser
evaporation-condenser is used in a cascade refrigeration system in which the refrigerant on the high-temperature side vaporizes and absorbs heat, and the refrigerant on the low-temperature side emits heat and condenses in it, so it is called an evaporator-condenser.
There are three basic structural forms of the evaporator-condenser: vertical shell and tube, vertical coil or horizontal and sleeve type. Shell and tube vertical and coil vertical evaporator-condenser structures. Generally, the high temperature side refrigerant liquid vaporizes and absorbs heat in the straight tube and the coil tube, and the low temperature side gas refrigerant releases heat and condenses in the tube shell.
In order to improve the heat transfer efficiency, the two refrigerants mostly flow in reverse, and the heat transfer temperature difference between the high and low temperature sides is generally 5~10℃. The heat transfer coefficient of an evaporation condenser is 460~520W/ (m2.K).
The structure of the double-pipe evaporator-condenser is similar to that of the double-pipe condenser, which is formed by bending two steel pipes with different diameters. Low-temperature walk-in cooler refrigerant liquid vaporizes and absorbs heat between tubes, and high-temperature refrigerant vapor releases heat and condenses in small tubes. The double-pipe evaporative condenser is only used for small low-temperature equipment. This article is compiled by the editor of refrigerated showcase walk-in cooler. For more information, please visit: www.ihdjx.com
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