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Air Conditioner Efficiency. Air Conditioner Problem Suppose an older home in San Antonio is equipped with a central air-conditioning unit with SEER rating.

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Presentation on theme: "Air Conditioner Efficiency. Air Conditioner Problem Suppose an older home in San Antonio is equipped with a central air-conditioning unit with SEER rating."— Presentation transcript:

1 Air Conditioner Efficiency

2 Air Conditioner Problem Suppose an older home in San Antonio is equipped with a central air-conditioning unit with SEER rating equal to 6 and that this home consumes 36,000 kWh of electrical power each year to power this system. Suppose this system is replaced by a central unit with a SEER rating equal to 18.

3 1. How much energy (in kWh) is consumed annually by the central A/C unit after the upgrade? Energy Consumed = = 36,000 kWh Old SEER / New SEER = 36,000 kWh 6 /18 = 36,000 kWh 1 /3 = 12,000 kWh

4 2. How much energy is saved annually by switching to the A/C unit with the higher SEER rating? Energy Saved = = 36,000 kWh – 12,000 kWh = 24,000 kWh

5 3. How much money is saved annually, assuming that the cost of electricity equals $0.10/kWh? Money Saved = = 24,000 kWh $0.10/kWh = $2,400

6 4. What is the payback period if the cost of purchasing and installing the new A/C unit equals $4,800? Cost = $4,800 Savings= $2,400/year Payback = Cost / Savings = 2 years


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