Clean Room Equipment Suggestions??
Clean Room Equipment Suggestions??
(OP)
Any recommendations on a manufacturer or type of equipment for a clean room? I am probably in the 2000-3000 CFM range, of which anywhere from 30% to 100% may be outside air based on hood usage. Location is near Chicago. They want to maintain 68 deg F +/- 1 deg and 45% RH +/- 5%. I'm still kicking around chilled water versus DX and hot water vs electric heat. I will probably need an ultrasonic humidifier for winter.
Any recommended manufacturers, especially one who can really help out with the equipment selection?
Any recommended manufacturers, especially one who can really help out with the equipment selection?





RE: Clean Room Equipment Suggestions??
RE: Clean Room Equipment Suggestions??
RE: Clean Room Equipment Suggestions??
RE: Clean Room Equipment Suggestions??
You need to know how clean you have to maintain the space, the class
I did a lab unit back in the day when I worked for EngA. Over cool the air to get that dewpoint you want, reheat it with discharge air control (reset) to keep the space at whatever temperature you wanted. We had a fancy dri-steem humidifier in it for winter time.
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: Clean Room Equipment Suggestions??
RE: Clean Room Equipment Suggestions??
Maybe a rotary heat exchanger (http://www.klingenburg.de/en/products/rotors.html) then you also get part of your moisture back so you don't need to humidify as much.
And of course as much recirculated air as you can get.
Why the ultrasonic humidifier? Why not go for steam?
RE: Clean Room Equipment Suggestions??
RE: Clean Room Equipment Suggestions??
I think it is negligible if you are having a cleanroom at over 20 ACH and 100% outside air.
The contaminants are already inside the cleanroom and all the AC does is dilute and extract. The small carry over should be of no influence.
Besides, if you place your fans right there won't be any carry over as there will be positive pressure from the clean air side to the extraction air side of the rotary exchanger.
RE: Clean Room Equipment Suggestions??
RE: Clean Room Equipment Suggestions??
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: Clean Room Equipment Suggestions??
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: Clean Room Equipment Suggestions??
I agree, there will be carry over.
I am not very familiar with heat pipes so I don't know how their thermal efficiency compares to a rotary exchanger.
If the customer is after as much energy-saving as he can get then I still think a rotary exchanger is worth a look. Seems to me there is a saving to be made on humidifying the cold and dry winter air. And when you have high outside humidity in summer, getting rid of a bit of moisture will also cut down on the cooling load.
As for the carry over: if at 20+ ACH of 100% outside air ,with a minimal fraction of carry over, there are still doubts about the indoor airquality, wouldn't it be time to think about putting the workers in suits with fresh air supply to the suit?
What I mean is, I feel the "carry over issue" is often more about psychology than anything else...
RE: Clean Room Equipment Suggestions??
RE: Clean Room Equipment Suggestions??