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.
Transportation Tipping. Cab driver: 15 percent to 20 percent tip of the fare. (Find out ahead of time if your cabbie accepts a credit card. If he or she doesn't, make sure you have enough cash for both fare and tip.) Airport Red Cap/Baggage personnel: $1 to $2 per bag. Wheelchair attendants: This really depends on the level of service.