ASEM Stamp Industrial Shell Tube Evaporator With Carbon Steel Shell Material

ASEM Stamp Industrial Shell Tube

Evaporator Dry Type Heat Exchanger

According to the type of cooling medium is different, the evaporator can be divided into two categories:

(1) cooling liquid refrigerant evaporator. Used to cool liquid refrigerant - water, saline or ethylene glycol

solution. This type of evaporator commonly used horizontal evaporator, riser evaporator and spiral tube

evaporator and so on.

(2) Evaporator for cooling air. This type of evaporator has a cooling pipe and a chillers.

First, the horizontal evaporator

1, its horizontal shell and tube condenser with the structure is basically similar. According to the liquid

supply can be divided into shell and tube evaporator and dry evaporator two. Horizontal shell and tube

evaporator is widely used in closed brine circulation system. Its main features are: compact structure,

liquid and heat transfer surface contact with high heat transfer coefficient.

But it needs to fill a large number of refrigerants, liquid column on the evaporation temperature will have a

certain impact. And when the brine concentration is reduced or the salt water pump is shut down for any

reason, the brine may be frozen in the tube.

If the refrigerant is freon, the freon dissolved lubricating oil is difficult to return to the compressor. Also

need to stop working when cleaning.

2, dry Flon evaporator main difference is: the refrigerant flow in the tube, while the refrigerant in the tube

outside the flow. After the flow of the freon liquid from the lower end of the side of the end into the

evaporator, after several processes from the top of the end of the cover, the refrigerant in the tube with

the flow and continue to evaporate, so the wall is part of the possession of steam, so , Its heat transfer

effect as full liquid.

However, it has no effect on the evaporative temperature of the liquid column and is better due to the

higher flow rate of Freon (≥4 m / s).

In addition, due to the tube filled with a large number of refrigerant, thereby slowing the risk of freezing.

This kind of evaporator refrigerant charge only enough liquid type 1/2 ~ l / 3 or less, so called "dry

evaporator".