Chapter 8, Problem 8.39CU

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Question 1 a. Explain the following terms related to thermodynamics: i. Closed system. ii. Intensive property. iii. Thermodynamic cycle. iv. Heat engine. b. Sketch a T-s diagram of steam as pure substance and clearly indicate the following terms on the diagram: i. the liquid region. ii. the wet region. ii. the superheat region iv. the critical point v. the saturated liquid line. vi. the saturated vapour line.

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State if the listed statement is Ture (T) or False (F) and correct the false statement: 1. Thermodynamic is a science of energy 2. Closed system is also called control volume 3. Steam power plant cycle is employed to produce a mechanical and electrical energy 4. In a Carnot cycle, the isothermal process in a boiler and a condenser ( ) 5. Isobaric process means volume is constant 6. Isentropic process means adiabatic and reversible 7. Pump is a device that consumes energy 8. Compressor is a device that raises a pressure of incompressible fluid flow ( ) 9. Thermal efficiency means the output by input 10. Cycle means a group of process that has initial state and final state ( ) ( )

what are the instruments/materials used by scientist to study Thermoclines under water.

Explain the heat transferred from a furnace (Q) to convert the boiler feed water at 25 ° C into superheated steam at 17 bar and 250 ° C.

Steam enters the turbine of a vapor power plant at 600 lbf/in.², 1000°F and exits as a two-phase liquid-vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.² The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW. Determine: (a) the percent steam quality at the turbine exit. (b) the percent thermal efficiency. (c) the steam mass flow rate, in lb/h.

Steam enters the turbine of a vapor power plant at 600 lbf/in.², 1000°F and exits as a two-phase liquid-vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.² The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW. Determine: (a) the percent steam quality at the turbine exit. (b) the percent thermal efficiency. (c) the steam mass flow rate, in lb/h. Part A * Your answer is incorrect. Determine the percent steam quality at the turbine exit. x₂ = i 78.67 %