Basic principle of shell and tube evaporator

Shell and tube evaporator is a double-layer metal plate formed by high-pressure steam expansion or mechanical equipment pressure, and can also be cast with aluminum alloy. This shell and tube evaporator is generally used in household refrigerators, product display cabinets, Popsicle storage boxes and other small refrigeration equipment. Shell and tube evaporator cast by aluminum alloy is generally used for contact freezing, generally known as flat shell tube freezer. Below, we will understand the basic principle of shell and tube evaporator!
Principle of shell and tube evaporator:
Shell and tube evaporator is widely used because of its good heat conduction effect, compact structure, small footprint and convenient installation. The structure of the shell and tube evaporator of the industrial chiller is the same as that of the vertical shell and tube cooler. In order to control a moderate flow rate, the carrier refrigerant enters from under the bearing end cover and exits from the upper end, flowing back and forth in the evaporation tube and the bearing end cover to become a multi-program flow. The refrigerant flows in the pipeline, the refrigerant liquid after the throttle valve enters from the bottom or side of the evaporator, and the air after the hair is discharged from the upper end.
The thermal conductivity of shell and tube evaporator is greater in the liquid than in the vapor body, and better in the flow than in the stop.
When the shell and tube evaporator is working, a certain amount of liquid refrigeration dose of liquid refrigerant should be retained. The level gauge is operated by a float ball valve. The relative height of the static liquid level should be the diameter of the upper and lower sealing head. The vast majority of condensers are immersed in liquid and carry out heat exchangers in liquid form. Therefore, the actual effect of heat conduction is good, and the thermal conductivity is relatively large. However, the liquid level meter cannot be too high, otherwise the liquid collection of the industrial chiller will occur.