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A500-W electric space heater with a small fan inside heats
Chapter 3, Problem 6CGP(choose chapter or problem)
Problem 6CGP
A500-W electric space heater with a small fan inside heats air by blowing it over a hot electrical wire. For each control volume—(a) wire only, (b) all the room air, and (c) total room air plus the heater—specify the storage, work, and heat transfer terms as+500W or −500 W or 0 (neglect any Q through the room walls or windows).
Questions & Answers
QUESTION:
Problem 6CGP
A500-W electric space heater with a small fan inside heats air by blowing it over a hot electrical wire. For each control volume—(a) wire only, (b) all the room air, and (c) total room air plus the heater—specify the storage, work, and heat transfer terms as+500W or −500 W or 0 (neglect any Q through the room walls or windows).
ANSWER:
Solution 6 CGP:
Step 1 of 2:-
Here we have to specify the storage, work and heat transfer terms for each control volumes as, wire only, all the room air and total room air and the heater.
- Wire only.