Question

A passive solar house that is losing heat to the outdoors at an average rate of
50,000 kJ/h is maintained at 22°C at all times during a winter night for 10 h. The
house is to be heated by 50 glass containers each containing 20 L of water that is
heated to 80°C during the day by absorbing solar energy. A thermostat-controlled
15-kW back-up electric resistance heater turns on whenever necessary to keep the
house at 22°C.
a. How long did the electric heating system run that night?
b. How long would the electric heater run that night if the house incorporated no
solar heating

Answer 1

Answer:

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