Fundamentals Of Thermal-Fluid Sciences 6th Edition Yunus Cengel, John Cimbala, Afshin Ghajar - Solutions

A homeowner is trying to decide between a high-efficiency natural gas furnace with an efficiency of 97 percent and a ground-source heat pump with a COP of 3.5. The unit costs of electricity and natural gas are $0.115/kWh and $0.75/therm (1 therm = 105,500 kJ). Determine which system will have a
A heat engine is operating on a Carnot cycle and has a thermal efficiency of 47 percent. The waste heat from this engine is rejected to a nearby lake at 60°F at a rate of 800 Btu/min. Determine (a) the power output of the engine and (b) the temperature of the source. Source Tit Carnot HE Vnet,
A completely reversible heat engine operates with a source at 1500 R and a sink at 500 R. At what rate must heat be supplied to this engine, in Btu/h, for it to produce 5 hp of power?
Complete the blank cells in the following table of properties of steam. In the last column, describe the condition of steam as compressed liquid, saturated mixture, superheated vapor, or insufficient information, and, if applicable, give the quality. P, kPa T, °C v, m³/kg u, kJ/kg Phase
How is a steady-flow system characterized?
Complete this table for H2O: T, °F 300 500 400 P, psia 40 120 400 u, Btu/lbm 782 Phase description Saturated liquid
Complete this table for H2O: T, °C 140 125 300 P, kPa 550 750 V, m³/kg 0.035 0.140 Phase description Saturated liquid
Heated air is at 150°C. What is the temperature of this air in °F?
What is specific gravity? How is it related to density?
What is a quasi-equilibrium process? What is its importance in engineering?
What is the difference between pound-mass and pound-force?
Explain why the light-year has the dimension of length.

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