design model of a HVAC for a chemical process plant

What's your plant volume, required air turnover rate, temperature, relative humidity etc?

3000 sft x 8' ht., about 20-25 air changes, 22-25 temp.65%

Your plant air volume is 3000 x 8 = 24,000ft³.

With 20 - 25 air changes/hour, you'll need a fan or blower that can handle 8,000 to 10,000cfm or air.

To achieve 65% RH at 22^oC to 25^oC, you can either cool the air first then remove the moisture, or you can remove the moisture first, then cool it. You'll need to consult a psychrometric chart for the information.

There are two ways to dry the air, refrigerated drying, or chemical adsorbents.

I'm not a HVAC engineer, so I can only provide you with some guidelines so that you'll have a basic idea what to raise when you meet with the HVAC engineer you're consulting for the project.

What is your heat load ? Lets assume You need 50 BTUH/SF. 3,000 Sf X 50 =150,000BTUH, =12.5 tons system ( 15 tons )

To control A/C go to: www.kunne.us

Also, www.palmbeachrd.com

Teppo K. Jokinen ( BSME )