Redo Problem 8.8 for an 800-ton absorption chiller using 10 lb of steam per ton. The cost of steam is $10/1,000 lb.

Problem 8.8

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.