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.
This shows the valet that you appreciate their efforts and they, therefore, will show respect to your car. Valet Parking Tipping is usually around $2 for each time the valet parks or retrieves your car if there is no parking fee. Now, if there is a parking fee that does not mean that the valet should not get a tip. In fact, the higher the parking fee, the bigger the tip the valet should receive. For example, if parking costs $5, the tip to the valet can still be $2. However, if the parking charge is $10, the valet should be tipped $3; if the parking charge is $15, the valet should be tipped $4; and if the parking charge is $20, the valet should be tipped $5.