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.
When you arrive at your hotel after a long flight, first things first: Tip the taxi or limo driver. Ten to 15 percent of your total fare is usually expected. If you drive your own car, give the valet parking attendant $1 to $2. If you take a shuttle van or bus, tip the driver $2 per person.