9-22 Energy Audit of Building Systems: An Engineering Approach, Second Edition PROBLEMS 9.1 Consider an 800-ton chiller operating for 1,600 equivalent full-load hours per year. The chiller is a centrifugal chiller that is rated at 0.72 kW/ton. Determine the energy and cost savings when the following operating changes have been made: (a) The condensing temperature is reduced in its current setting by 5°F, 10°F, or 15°F. (b) The leaving chilled water temperature is increased from 40°F to 45°F and from 40°F to 50°F. Assume the electricity cost is $0.08/kWh. 9.2 Redo Problem 9.1 for an 800-ton absorption chiller using 10 lbs of steam per ton. The cost of steam is $10/1,000 lbs.