T=33°C Question of the Day Consider a person who emits 100W of heat in a house. The temperature outside is on average 33°C. He turns on the AC to keep the indoor temperature at Tc = 23°C for 8 hours a day. Question: 100W T (a) If the AC is running a Carnot cycle, find the COP of the AC operates at (i) T = 23°C; and (ii) TC = 25°C (b) Estimate how much energy in percentage he can save per day if he sets the indoor temperature to 25°C instead. Energy saved in % = Energy spent at 23°C – Energy spent at 25°C Energy spent at 23°C Hints: 1. The answer actually depends on how efficient the AC device is, but we can assume the AC is the most efficient AC which runs in Carnot Cycle. 2. Assume that electricity power convert 100% to power in the compressor of the AC.
T=33°C Question of the Day Consider a person who emits 100W of heat in a house. The temperature outside is on average 33°C. He turns on the AC to keep the indoor temperature at Tc = 23°C for 8 hours a day. Question: 100W T (a) If the AC is running a Carnot cycle, find the COP of the AC operates at (i) T = 23°C; and (ii) TC = 25°C (b) Estimate how much energy in percentage he can save per day if he sets the indoor temperature to 25°C instead. Energy saved in % = Energy spent at 23°C – Energy spent at 25°C Energy spent at 23°C Hints: 1. The answer actually depends on how efficient the AC device is, but we can assume the AC is the most efficient AC which runs in Carnot Cycle. 2. Assume that electricity power convert 100% to power in the compressor of the AC.
Related questions
Question
Transcribed Image Text:T=33°C
Question of the Day
Consider a person who emits 100W of heat
in a house. The temperature outside is on
average 33°C.
He turns on the AC to keep the indoor
temperature at Tc = 23°C for 8 hours a day.
Question:
100W
T
(a) If the AC is running a Carnot cycle, find the COP of the AC operates at
(i) T = 23°C; and
(ii) TC = 25°C
(b) Estimate how much energy in percentage he can save per day if he sets the
indoor temperature to 25°C instead.
Energy saved in %
=
Energy spent at 23°C – Energy spent at 25°C
Energy spent at 23°C
Hints:
1. The answer actually depends on how efficient the AC device is, but we can assume the AC is the
most efficient AC which runs in Carnot Cycle.
2. Assume that electricity power convert 100% to power in the compressor of the AC.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 2 images
