Determine the increase in energy cost of a 100-kW air compressor operating 8,000 hours per year due to a contaminated air filter. Assume that:
• The electrical motor efficiency is 90 percent.
• The pressure drop is 1.0 kPa for a clean air filter but becomes 3 kPa for a contaminated filter.
• The cost of electricity is $0.05/kWh.