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Heating Room Calculation

Heating Room Calculation

Heating Room Calculation

(OP)
hi guys,

looking for some help double checking my calculation.

i want to heat a room in the Plant to 130F (sterilization process). The temp of surrounding rooms is 70F. If my room dimensions are LxWxH = 178'x69'x20', the cubic volume of my room is 245,640.

Delta T=60F

We know 1 BTU is sufficient to heat 55cu.ft of air by 1F.

I've calculated 21.8 BTU/sq.ft is required. However, I'm not sure how to calculate the BTU/HR required (I calculated a really large value that seems ridiculous) so that I can spec out & purchase the appropriate electrical heaters to accomplish the job.

Any help is appreciated...

 

RE: Heating Room Calculation

(OP)
IRstuff

within a couple hours would be ideal.

RE: Heating Room Calculation

Figure out the heat loss thru walls, ceiling and floor + heat requirement for air infiltration thru cracks and whenever your open the door to remove sterilized productss+ heat requirement for whatever item you intend to sterilize.
The heat loss thru the structure will be in BTU/HR; Heat requirement for infiltration can be done by knowing some constants or by estimating the mass flow rate of the air and the result will be in BTU/HR; the heat requirement to sterilize will require a time element to determine the rate of temperature rise in the items in order to get BTU/HR during the batching process and for continuous process mass rate of the items to be sterilized will be required for a BTU/HR determination.
 

RE: Heating Room Calculation

(OP)
Chicopee,
I understand the info you're requesting, but don't have all of it. Can't I simplify this down and just make some assumptions? I found a site online Heater Shop that provides a BTU calculator.....It's calculating 4,605,750 BTU/HR based on the information I originally stated. That's seems HUGE! Then again, the volume of the room is quite large!.......  

 

RE: Heating Room Calculation

(OP)
great! got it. understand. appreciate greatly you spending time putting this together, sspeare.

RE: Heating Room Calculation

Glad it worked out.  Watch out for those rules of thumb.  They can hurt you.  Go back to the basics.

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