7-151 The energy used to compress air in the United States is estimated to exceed one-half quadrillion (0.5 1015) kJ per year. It is also estimated that 10 to 40 percent of the compressed air is lost through leaks. Assuming, on average, 20 percent of the compressed air is lost through air leaks and the unit cost of electricity is $0.07/kWh, determine the amount and cost of electricity wasted per year due to air leaks. | |
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