What is the coaxial heat exchanger in the chiller?
Whatis the coaxial heat exchanger in the chiller?
There are black pipes in the middle of every chillers, and many peoplewill ask, what is this and it takes up such
a large space. This is thecoaxial heat exchanger in the chiller.What is a coaxial heat exchanger?Let's explain it
Figure 1 Chiller
Taking Hangzhou Shenshi coaxial heat exchanger as an example, the coaxialheat exchanger is a kind of circul-
ating heat exchanger. Coaxial heat exchangeris also divided into single-system heat exchanger and multi-system
heat exchanger. The more heat exchangersystems, the higher the heat exchange efficiency.
Figure 2 Single-system,dual-system and multi-system exchanger
Shenshi coaxial heat exchanger is generally composed of two tanksconcentrically set inside and outside. The ref-
rigerant flows in the sandwichchannel between the inner tube and the outer tube, and the water flows in theinner
tube, and the heat of the refrigerant is transferred to the watercarrier. The use of high-efficiency spiral grooved
tubes increases the heat exchangearea, at the same time strengthens the heat exchange between the refrigerant
and the water side, and enhances the heat exchange capacity of the heatexchanger.
Figure 3 Multi-materialspiral grooved pipe
Hangzhou Shenshi coaxial heat exchanger is outsourced through special electrophoresis treatment to provide
complete and comprehensive anti-corrosion protection for the inner cavity,weld, edge and other weak parts of the
casing. Service life. The coating filmis fine, uniform and smooth, and has the best adaptability for products that
When coaxial heat exchangers were not widely used, immersion heat exchangers were used in the chiller ind-
ustry. Compared with immersed heat exchangers, is thereany difference between using coaxial heat exchangers
now? Chiller can usecoaxial heat exchangers to replace the previous immersed heat exchangers.Because immers-
ed heat exchangers and other forms rely on the naturalenvironment, the heat exchange efficiency is very low, so
people think of usingforced exchange to improve heat exchange. The efficiency of the circulatingheat exchanger is
one of the most widely used methods.
Figure 5 Immersion heatexchanger and coaxial heat exchanger
Whatare the advantages of coaxial heat exchangers?
1.The structural features are concise and clear, modular design, and easyadjustment. Non-standard customiza-
tion can be made according to the needs ofenterprises, and the shape and size can be adjusted, such as rectangle,
round,double helix, spiral, trumbone , etc.
2.High heat exchange efficiency. It is a pure counter flow heat exchanger. Inaddition, the surface of the inner
tube is embossed to enhance the heattransfer on the fluorine side. Under the same working conditions of the inner
tube of the same length, the condensation heat transfer performance of R410arefrigerant is improved by at least
3.Few solder joints and strong reliability.
4.Good freezing resistance, not easy to scale, and long service life.