The net work of the cycle is defined by the difference between the turbine work and the pump work: If the pump work is neglected, the net work of the cycle reduces to: Then the thermal efficiency of this system is defined by the rate between the net work and heat transfer from the boiler: Air-Fuel ratio and Air Excess.
At The Airport Valet, we believe that you should only tip commensurate with the service you receive. That said, currently the average tip is $3.00 - $5.00 on both departure and arrival. However, daily our valetsâ tips do range from as low as $1.00 to as high as $30.00.
If it's raining, snowing or over 90 degrees and you get good service, tip towards the $2.00 per bag side of the scale. Remember to bring dollar bills with you to the airport. If your baggage handler takes two or three bags from you and all you have is a five dollar bill, do not ask for change back.