Avg. BTU Rating for Appliances (Microwaves, Refrigerators, Etc.)

[supaman79]

Does anyone know where I can find an avg. BTU rating for refrigerators to apply to my cooling loads? I've looked in the ASHRAE handbooks, but I can't seem to find anything.

 

[MintJulep]

ASHARE Fundamentals, chapter 29 suggests 300 BTU/hr sensible per 10 ft^3 of interior volume (for small commercial equipment).

 

[friartuck]

the sizes and ratings are so varied, I have given up trying to guesstimate one. The fridge duties (compressor ratings) dont help because the motor may only run for a fraction ofthe hour.

I could only estimate the gain by determining the physical external area, then use a typical internal-external temp difference multiplied by the thermal transmittance value.

It wouldn't be much I guess, perhaps 20W/m2 of fridge area for internal at -20 c and room at 20C.

so for fridge at 2m high x 0.6x0.6 (we have small fridges in the UK) then =96Watts (excludes allowance for compressor COP etc) I would allow something like 150Watts to be on the safe side.


Friar Tuck of Sherwood

 

[supaman79]

Thanks guys,

You were a big help. Friartuck is there anything you don't know? haha

 

[blutfort]

Not sure if you know the power consumption, but if you did couldn't you convert the watts of power input directly to BTUH?

 

[imok2]

supaman try this:

http://www.nyseg.com/nysegweb/online.nsf/doc/he/$file/HomeEnergyUse.pdf

 

[imok2]

Also this,,,,

http://www.nyseg.com/nysegweb/online.nsf/doc/he/$file/HomeEnergyUse.pdf