Answer Happy

8. The gas utility conducts an energy efficiency audit of a customer and identifies several issues. The hot water distribution line throughout the facility is uninsulated and has several significant leaks. Four boilers are producing the hot water. All four boilers are 70%-efficient models, each with a maximum output of 150MMBtu/hr. They all operate at 75% of full capacity 24 hours a day, 365 days a year. The utility recommends replacing the four boilers with three 95%-efficient boilers, each with an output of 180MMBtu/hr. The utility's fully-loaded cost for operating the boilers (energy, o+m, etc.) is $0.087/Btu. (this figure does not include water). The upgrade will have a useful life of 35 years. 8a. How much natural gas (ccf) does the utility currently provide this facility each year? (5 points) 8b. The leaks amount to 2,000 gallons/hour of 181°F water. Quantify the annual financial savings from fixing the leaks. (5 points) 8c. Are the three, 95%-efficient, 180 MMbtu boilers sufficient to meet the facility's needs? (5 points)