TFS · Practice Exam 2 · Problem 13
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TFS · Practice Exam 2 · Problem 13
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- Problem: During winter operation, 5,000 CFM of outside air at 40 degrees and 60% relative humidity is preheated with a 50KW electric coil.
- Approach: So to do total increase in heat, we want to use the rule of thumb, which is 4.5 CFM delta H.
- Key values: 60 %, 50 %, 2 in
- Result: So we can say delta T equals T2 minus T1, therefore T2 equals T1 plus delta T.
- ✅ Answer: D
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