The ventilating fan of the bathroom of a building has a volume flow rate of 30 L/s and runs continuously. The building is located in San Francisco, California, where the average winter temperature is 12.2 °C, and is maintained at 22°C at all times. The building is heated by electricity whose unit cost is $0.09/kWh. Determine the amount and cost of the heat "vented out" per month in winter. (The gas constant and specific heat of air are R = 0.287 kJ/kg-K and Cp=1.0 kJ/kg-K. Consider air at P = 1 atm. and T=22 °C) 12.2°C
The ventilating fan of the bathroom of a building has a volume flow rate of 30 L/s and runs continuously. The building is located in San Francisco, California, where the average winter temperature is 12.2 °C, and is maintained at 22°C at all times. The building is heated by electricity whose unit cost is $0.09/kWh. Determine the amount and cost of the heat "vented out" per month in winter. (The gas constant and specific heat of air are R = 0.287 kJ/kg-K and Cp=1.0 kJ/kg-K. Consider air at P = 1 atm. and T=22 °C) 12.2°C
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Transcribed Image Text:9. The ventilating fan of the bathroom of a building has a volume flow rate of 30 L/s and runs
continuously. The building is located in San Francisco, California, where the average winter
temperature is 12.2 °C, and is maintained at 22°C at all times. The building is heated by
electricity whose unit cost is $0.09/kWh. Determine the amount and cost of the heat "vented
out" per month in winter. (The gas constant and specific heat of air are R = 0.287 kJ/kg-K and
Cp=1.0 kJ/kg.K. Consider air at P = 1 atm. and T-22 °C)
22°C
30 L/s
Fan-
12.2°C
Bathroom
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