Chapter 8, Problem 8.38CU

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Consider an ideal vapor compression system using R-134a. Its condensing pressure is 185 psia (sat. temp. 120 F) and evaporating pressure is 33 psia (sat. temp. 20 F). Using the attached P-h state diagram, answer the questions below. (You may want to have a ruler to help read the chart.) a) Show the ideal cycle. Label the states (1,2,3,4). b) Calculate the COP for this ideal cycle. c) Determine the refrigerating effect per refrigerant circulated [Btu/lbm], d) For ATsc = 10 F of subcooling, how much does it change the refrigeration effect [% change]. e) Determine the COP for part d. f) Determine the increase in COP for ATsh = 1 F of superheat. To answer this question, compare the cycle in part e that has 0 F superheat with a cycle that has 20 F of superheat and calculate 4COP/ATsh- %3D

How much does it cost to start and run a Gas Turbine Power Plant running on Diesel Fuel?

Discuss and Illustrate the PV diagram for Carnot Cycle.

A 136 kg/s steam with an inlet condition of 52 bar, 400 C enters a rankine turbine and expands to 36 kPa. determine the work, the thermal efficiency, and the steam rate (a) for the cycle, (b) for the turbine. (c) With the same specifications, consider the steam expanded on an actual turbine and the brake steam rate is 4800 g/kwh and the driven electric generator has an efficiency of 0.93. Find Brake Thermal Eff, Brake Engine Eff, Combined Work, and quality or temperature of actual exhaust steam

True false want to make sure I have the right answers for study

7. Steam at 7.2 MPa, 600OC expands in a Rankine turbine to 0.45 MPa. For 180 kg/s of steam, determine the work, the thermal efficiency, and the steam rate (a) for the cycle, (b) for the turbine with the same specifications, the brake steam is 7.40 kg/kW-h and the driven electric generator has an efficiency of 91%. (c) Find eb, nb, WK, and quality or actual exhaust steam. Please answer letter c. Thanks

In a Rankine Cycle, real work required by the pump is less that the isentropic work. True False

2. A steam turbine installation takes steam at 70 bar, with 100°C of superheat, and expands to an exhaust pressure of 0.06 bar. If the efficiency ratio on the Rankine cycle is 0.75, determine the thermal efficiency of the installation and the specific steam consumption rate in kg/kWh. (0.29, 4.19)