refrigeration evaporator performance
refrigeration evaporator performance
(OP)
My work involves an environmental test chamber (hot, cold & humidity, the issue I have is during cold tests (-20°F or so) the evaporators frost up from traffic into and out of the chamber (reducing performance of the refrigeration system). Looking for information on evaporator de-rating as ice is accumulated and sucessful stratigies to combat or reduce ice formation on evaporators.





RE: refrigeration evaporator performance
RE: refrigeration evaporator performance
This was a two-fold accomplishment; no more wet carpet and
heat-transfer into the bathroom. A small fan gave passive
circulation as well as the evacuation fan.
SO, what system is it ? Is the evapp isolated ? What heating cycle/element does it have on it ? I need more parametric info........
thestocksguy@hotmail.com
RE: refrigeration evaporator performance
Do you have more details on the design? What is your CFM? Type of refrigerant? Low temp. fluid?
What is the capacity of your de-humidifer?
You need to control the grain level (mechanical humidification and dehumidification). I did work on a wind tunnel with 50 deg. C to -40 deg. C.
If the frosting is due to the trafic (in and out) try for conditioned air curtins.
Fayaz
RE: refrigeration evaporator performance
The problem you have mantioned of accum. of frost on coils lowering overall performance , I had a similar problem on a chamber (Lab-line Envornmental chamber 708a-2dhx.in which I found pockets around cooling coil by-passing circulating air . Which when tackled properly maintained temp. and humidity to the set points. Checking defrosting timer might help further.
Regards. Alley. Karachi Pakistan.