The AB brewery in Fairfield, CA produces 1.3 million gallons of beer per year. The plant operates 96% of the time. Gas costs 1.25 per therm and electricity costs $0.09/kW-hr. As brewery engineer, you must consider the following pasteurization options:Option 1aAZ
Lager
Heat (Natural Gas)
Heat (Refrigeration)
4oC 72oC 4oC
Lager
Heat (Electricity)
Heat (Refrigeration)
4oC 72oC 4oC
Lager
Heat (Natural Gas)
Heat (Refrigeration)
4oC 65oC
T4
72oC
4oC
What is the yearly heating cost for all three options?
What fraction of the heating and cooling is achieved in the regenerator?
Which option should you choose?