If there is a diesel engine cogeneration system burns 12 gallons of number 2 fuel oil (140,000 BTU/gallon) per hour. Electrical output is 150 kw. Exhaust gas is used to make 915 lbs. of useful steam per hour with a useable heat content of 800 BTU/lb.steam. What is the overall system efficiency? Pick one choice from A to D and show work. A) 65% B) 74% C) 79% D 84%
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\[ \text{Total Energy Input} = 12 \text{ gallons/hour} \times 140,000 \text{ BTU/gallon} = 1,680,000 \text{ BTU/hour} \] Show more…
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