Now, most customer prefers electric heater defrosting when selecting a new refrigeration system. Because it’s simple and easy to maintenance. People always like familiar things.
Why not is hot gas defrosting? What’s the difference.
Hot gas defrosting is very mature and with long history. Without a heater, it’s less breakdown actually.
For our prefab walk in freezer, we’ll advise the monoblock refrigeration units, which are all hot gas defrosting. It’s automatic control. So customer no need to worry about the installation and how to control.
For big cold room projects, with several chambers, if we use electric heating defrosting, power consumption is huge if we look at the annual power bill. But if we use hot gas, most of them could save. Of course, the control system need to design.
Below is one design for the defrost cycle. Please check.