A house is to be maintained at 20°C when the outside air is at -25°C. It is determined that 1800 |KJ is required each minute to accomplish this.

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A house is to be maintained at 20°C when the outside air is at -25°C. It is determined that 1800
KJ is required each minute to accomplish this.
Transcribed Image Text:A house is to be maintained at 20°C when the outside air is at -25°C. It is determined that 1800 KJ is required each minute to accomplish this.
If an electric heat pump is used to supply this energy, determine the minimum
theoretical work input for one day of operation, in kJ/day.
4.70 x 10^5 kJ/day
2.76 x 10^2 kJ/day
3.98 x 10^5 kJ/day
3.26 x 10^2 kJ/day
Evaluating electricity at 13 cents per kWh, determine the minimum
theoretical cost to operate the heat pump, in $/day. ($1 = 100 cents)
$16.97 /day
$14.38/day
$9.97/day
$1.17/day
Transcribed Image Text:If an electric heat pump is used to supply this energy, determine the minimum theoretical work input for one day of operation, in kJ/day. 4.70 x 10^5 kJ/day 2.76 x 10^2 kJ/day 3.98 x 10^5 kJ/day 3.26 x 10^2 kJ/day Evaluating electricity at 13 cents per kWh, determine the minimum theoretical cost to operate the heat pump, in $/day. ($1 = 100 cents) $16.97 /day $14.38/day $9.97/day $1.17/day
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