1. 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) 4oC4oC 72 o C4oC4oC

2. Lager Heat (Electricity) Heat (Refrigeration) 4oC4oC 72 o C 4oC4oC Lager Heat (Natural Gas) Heat (Refrigeration) 4oC4oC 65 o C T4T4 72 o C 4oC4oC

3. 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?