Microsoft Word - Cengel and Boles TOC _2-03-05_.doc

Chapter 7 | 395 The work needed to compress a unit mass of air at 20°C from the atmospheric pressure of 101 kPa to 700
101 80 ...

power supplied to the electrical power consumed during operation is called the motor efficiency,hmotor. Therefore, the electric ...

specifications, on the other hand, may drop from 91 percent at full load to 75 percent at quarter load. The first motor is obvio ...

normally drawn from inside the building or the shelter. However, in many locations the air temperature in the building is higher ...

Chapter 7 | 399 much money will be saved as a result of reducing the pressure of the compressed air. Solution It is observed tha ...

ambient in a liquid-to-air heat exchanger. This heat rejectedusually amounts to 60 to 90 percent of the power input, and thus it ...

Chapter 7 | 401 Isentropic process: where Pris the relative pressureand vris the relative spe- cific volume. The function s° dep ...

402 | Thermodynamics PROBLEMS* Entropy and the Increase of Entropy Principle 7–1C Does the temperature in the Clausius inequalit ...

Chapter 7 | 403 7–26 During the isothermal heat addition process of a Carnot cycle, 900 kJ of heat is added to the working fluid ...

this problem. Let the surrounding temperature vary from 0 to 100°C. Discuss your results. 7–37E A piston–cylinder device contain ...

Chapter 7 | 405 7–51E A 1.2-ft^3 well-insulated rigid can initially contains refrigerant-134a at 140 psia and 70°F. Now a crack ...

7–62C Starting with Eq. 7–34, obtain Eq. 7–43. 7–63C What are Prand vrcalled? Is their use limited to isentropic processes? Expl ...

Chapter 7 | 407 Assuming the argon remaining inside the tank has undergone a reversible, adiabatic process, determine the final ...

7–91 Liquid water enters a 25-kW pump at 100-kPa pres- sure at a rate of 5 kg/s. Determine the highest pressure the liq- uid wat ...

Chapter 7 | 409 the kinetic energy change of the steam, determine (a) the temperature at the turbine exit and (b) the power outp ...

temperature of the refrigerant and (b) the entropy generation during this process. 7–119 Steam enters an adiabatic turbine stead ...

Chapter 7 | 411 enter at 180°C at a rate of 2.2 kg/s and leave at 95°C. Deter- mine (a) the rate of heat transfer to the air, (b ...

7–136E In a production facility, 1.2-in.-thick, 2-ft 2-ft square brass plates (r 532.5 lbm/ft^3 and cp 0.091 Btu/lbm · °F) th ...

Chapter 7 | 413 opened, and one-half of the total mass is withdrawn from the tank in the liquid form. Heat is transferred to wat ...

full load, and its operation at part load is negligible. If the cost of electricity is $0.075/kWh, determine the amount of energ ...