Humidity control.

[Markpskelton]

Hi

I have been asked to size up a unit and cooler for a forced air cooled chocolate display counter we are building at work. The counter is 3m long 1m wide and 1/2m deep topped with glass and an open front to serve.

I have been told the specs need to be 18*C running temp @ 50% RH

How do I keep the humidity at 50% ?

I have noticed some chocolate fridges have humidity control how does this work ?

Any help would be appreciated as I only normally build up right and chest fridge / freezers and have only just started designing systems for the company as I have been moaning for years about poor design. And don't want to look silly now lol !

[The Viking]

First thing to figure out is if the humidity needs to be below or above 50%...


:cool:

[Markpskelton]

Ah thanks its below 50%

[ozzy bill]

hi markpskelton
get yourself a good controller and look into [pid]settings you can re heat return air ie increase due point or use two coils tx and cappilary,,good luck

[Markpskelton]

Will do thank you very much !

[chemi-cool]

you can also adjust the drain pipe so it keeps the water level in the drain pan higher then normal.
these water will evaporate slowly and keep the humidity high.

you can also choose an evaporator coil with 7 to 10mm fin spacing and evaporating temp at 5-6C with evaporating regulator.