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Solved: At winter design conditions, a house is projected
Chapter 2, Problem 241E(choose chapter or problem)
At winter design conditions, a house is projected to lose heat at a rate of 60,000 Btu/h. The internal heat gain from people, lights, and appliances is estimated to be 6000 Btu/h. If this house is to be heated by electric resistance heaters, determine the required rated power of these heaters in kW to maintain the house at constant temperature.
Questions & Answers
QUESTION:
At winter design conditions, a house is projected to lose heat at a rate of 60,000 Btu/h. The internal heat gain from people, lights, and appliances is estimated to be 6000 Btu/h. If this house is to be heated by electric resistance heaters, determine the required rated power of these heaters in kW to maintain the house at constant temperature.
ANSWER:Step 1 of 3
The heat loss from a house is to be made up by heat gain from people, lights, appliances, and resistance heaters. For a specified rate of heat loss, the required rated power of resistance heaters is to be determined.
Assumptions are
1. The house is well-sealed, so no air enters or heaves the house.
2. All the lights and appliances are kept on.
3. The house temperature remains constant.