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In 1993, the U.S. government instituted a requirement that all room air conditioners sold in the United States must have an energy efficiency ratio (EER) of 10 or higher. The EER is defined as the ratio of the cooling capacity of the air conditioner, measured in British thermal units per hour (Btu/h), to its electrical power requirement in watts.

In the 1970s, it was common to find room air conditioners with EERs of 5 or lower.

(c) Compare the operating costs for 10,000-Btu/h air conditioners with EERs of 5.00 and 10.0. Assume each air conditioner operates for 1,500 hours during the summer in a city where electricity costs 17.0¢ per kWh.

Answer :

Final answer:

The operating costs for 10,000-Btu/h air conditioners with EERs of 5.00 and 10.0 can be compared by calculating the amount of electricity used by each air conditioner and multiplying it by the cost of electricity. The operating costs for the 10,000-Btu/h air conditioners with EERs of 5.00 and 10.0 are $34.00 and $17.00, respectively, for 1,500 hours of operation during the summer.

Explanation:

The operating costs for 10,000-Btu/h air conditioners with EERs of 5.00 and 10.0 can be compared by calculating the amount of electricity used by each air conditioner and multiplying it by the cost of electricity. The EER of 5.00 means that the air conditioner's cooling capacity is 5,000 Btu/h and it consumes 1,000 watts of power. The EER of 10.0 means that the air conditioner's cooling capacity is 10,000 Btu/h and it consumes 1,000 watts of power.

To calculate the operating costs, we need to know the electricity cost per kilowatt-hour (kWh). In this case, the electricity cost is 17.0¢ per kWh.

The operating cost of an air conditioner can be calculated using the formula: operating cost = cooling capacity (in Btu/h) / EER x electricity cost (in $/kWh).

For the air conditioner with an EER of 5.00, the operating cost can be calculated as follows:

operating cost = 10,000 Btu/h / 5.00 x $0.17/kWh = $34.00 per 1,500 hours

For the air conditioner with an EER of 10.0, the operating cost can be calculated as follows:

operating cost = 10,000 Btu/h / 10.0 x $0.17/kWh = $17.00 per 1,500 hours

Therefore, the operating costs for the 10,000-Btu/h air conditioners with EERs of 5.00 and 10.0 are $34.00 and $17.00, respectively, for 1,500 hours of operation during the summer.

Learn more about operating costs for air conditioners here:

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