kw to btu chart

[mh183]

is their a rule of thumb or a chart to find the btu when you only have kw rating

 

[jumper]

See if this helps:
http://www.eformulae.com/engineering/units_of_power.php

 

[bob]

is their a rule of thumb or a chart to find the btu when you only have kw rating

Are you trying to convert A/C unit btu's to kw?

 

[480sparky]

My cacklator has 1 BTU = 0.2930710702 WH = 0.0002930710702 KWH.

1 KWH = 3412.141633 BTU.

 

[jumper]

Calculator, I found, might be useful.
http://www.cleavebooks.co.uk/scol/ccpower.htm

 

[bob]

A electric nickel chrome heater element produces 3.4 BTU/Hour
The very efficient mechanical refrigeration compressor produces 8.533 BTU/Hour+/-
I had a 4 ton unit 10 SEER that pulled 28 amps. That's 28x240 = 6720 kva /4ton = 1.7 kva per ton
One ton of frig.=12000 BTU/hour
1 watt=8.533 BTU/hour compressor

4 tons x 12,000=48,000 BTU/hour

48,000/8.533=5,625 watts 1.4 kw per ton 1.75 kva per ton

5,625/240 volts=23 amps more efficient machine

If you include the SEER, then you can do it another way. SEER is defined as the heat transferred per unit of energy, that is in BTU/watthour.

P = AC load/SEER

For your 4 ton unit and SEER = 10,

P = (48,000 BTU/hour)/(10 BTU/watthour) = 4,800 watts,

then throwing in PF,

I = P/(VxPF) = 4800W/(240V x 0.8) = 25A 1.2 kw per ton or 1.5 kva per ton

This is comparable to the other result.