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Suppose a home in the northern US has an annual need for heat (delivered into the living space) of 120 million BTU. Any electricity used comes from a power plant burning natural gas with 45% efficiency, with energy losses of 6% in electricity transmission and distribution. Any natural gas used has pipeline and distribution losses of 2%. Compare the following alternatives in terms of natural gas use, showing your calculations for each.

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Answer:

Explanation:

45% efficiency of burning natural gas on 120 million BTU = 0.45 X 120 million = 54 million BTU

6% energy loss in electricity transmission and distribution = 0.06 X 54 million = 3.24 million

Utilized energy at a home, that is, 94% = 94 X 32.4/6 = 50.76 million

2% energy loss in pipeline and distribution = 0.02 X 54 million = 1.08 million

Utilized energy at a home , that is, 98% = 98 X 1.08 million = 52.92 million.

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