A refrigeration energy exercise defines its performance ratio as useful cooling energy divided by electrical energy over the same period. Cooling is 240,000 Btu and electricity use is 20,000 Wh. What is the ratio?
- A0.083 Btu/Wh
- B120 Btu/Wh
- 12 Btu/Wh
- D220,000 Btu/Wh
Where to look it up
Explicit exercise assumptions; not a universal code requirement.
Why C is correct
240,000 / 20,000 = 12 Btu/Wh. This is the defined exercise ratio, not a certified SEER, AWEF or regulatory minimum for a walk-in cooler.