A perfectly insulated cubical office with length 10 m3 has an air conditioner that cools the house to 17 0C from 38 0C within 15 min with COPref of 3. If the density of air is taken as 1.225 kg/m3 with cv=0.72 kJ/kg 0C and cp = 1.0 kJ/kg 0C, determine the rate of heat removal (in kW) from the house, power used by the air conditioner and the cost of electricity (in Rands) for 3 hours in a building with six similar offices at a tariff of 280 c/kWh

A perfectly insulated cubical office with length 10 m3 has an air conditioner that cools the house to 17 0C from 38 0C within 15 min with COPref of 3. If the density of air is taken as 1.225 kg/m3 with cv=0.72 kJ/kg 0C and cp = 1.0 kJ/kg 0C, determine the rate of heat removal (in kW) from the house, power used by the air conditioner and the cost of electricity (in Rands) for 3 hours in a building with six similar offices at a tariff of 280 c/kWh

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.46P

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