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Air Condition calculate

Air Condition calculate

Air Condition calculate

(OP)
If I have a air condition unit, how can I calculate BTU/Hr. of this air condition?

RE: Air Condition calculate

well how long is a string

RE: Air Condition calculate

Short answer:  air enthalpy.

Long answer: It depends, what do you really want to do?

RE: Air Condition calculate

(OP)
I have a air condition and I would like to calculate cooling capacity.How can I calculate?
What value I must measure?

RE: Air Condition calculate

I take it the unit is in place, and you wish to find out what the cooling capacity of the unit (or split) is?
 

RE: Air Condition calculate

phirayu (Mechanical)
Check the manufacturers name/data plate.On the machine.
B.E.

RE: Air Condition calculate

If you measure the CFM across the cooling coil and measure the dry and wet bulb on the coil and off the coil you can determine the total BTU EX: say you have a three ton unit
The rule of thumb is 400 CFM/ton so you have 1200 CFM
The dry bulb is 75*F and the wet bulb is 60*F on the coil and 55 DB and 54 wet bulb off the coil. Plotting on the psycrometric chart gives an enthalpy difference of 3.74 btu/lb of air and a sensible heat ratio of 0.81 and the specific volume of the air is 13.653 cu ft/lb so if you have 1200 CFM/13.653cuft = 5,777 lb hr or 95lb/min. The total load at those conditions is 33,890 btu and the sensible cooling at 81% = 27,500 btu and the latent is ~6,285 btu. As I said as conditions change so does the output on capacity and if you want to know what it's capable of doing you need the mfg specifacions which should be rated at ARI specs

RE: Air Condition calculate

(OP)
Thanks all
I will try it!

RE: Air Condition calculate

snip
well how long is a string
snip

Twice as long as it is from the middle to one end.......

RE: Air Condition calculate

willard this is not a chat site... but it is correct

RE: Air Condition calculate

(OP)
What part call string?
Cooling coil?

RE: Air Condition calculate

Dear Phirayu,

There is no string in a cooling coil.

Forget about it. It was more a quick reaction.

RE: Air Condition calculate

(OP)
Sorry about my fool.
I'm new in this field.

RE: Air Condition calculate

Dear phirayu,

Do not worry you get there...

RE: Air Condition calculate

how i can deside capasity need in a hall
room legth 18 meeter width 5 meeters hight 7meeter

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