A quantity of water within a piston-cylinder assembly executes a Carnot power cycle. Duringisothermal expansion, the water is heated from saturated liquid at 45 bar until it is a saturatedvapor. The vapor then expands adiabatically to a pressure of 2 bar.(1) Sketch the cycle on a P-v diagram.(2) Evaluate the work per unit mass (W/m) and heat transfer per unit mass (Q/m) for process 4-1(Isothermal Expansion), in kJ/kg.(3) Evaluate the thermal efficiency.

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Answered: A quantity of water within a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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3. Air occupies a 0.3 m³ piston-cylinder at 150 kPa and 278 K. The piston-cylinder operates on a three-process cycle where from state 1 to state 2 the pressure is constant and V2 = 1.4 V1. From state 2 to 3 the compression is reversible adiabatic until V3 = V1, and the temperature at state 3 is 450 K. A constant-volume process completes the cycle. Sketch the cycle on a p-V diagram and determine the network and heat flows for the cycle.
The working gas of a thermodynamic cycle is a diatomic gas (assume constant specific heats.) The gas originally starts at 100kPa, 4m 3 and 27° C. It undergoes a four-step process --- • Process A-B: The gas is compressed at constant temperature to one-quarter of its original volume. • Process B-C: The volume of the gas is then doubled at constant pressure. • Process C-D: The gas then undergoes an adiabatic expansion. • Process D-A: The gas then undergoes a constant volume process back to its original state a) Make a table of the temperature, pressure, volume, internal energy, enthalpy, entropy and quality factor (T, P, V, U, H & S) at the start of each process. b) Make a table of the change in internal energy, heat flow, work done, change in enthalpy, and change in entropy (AU, Q, W, AH & AS) during each leg of the cycle. c) Draw well-labelled P-V & T-S diagrams (indicating lines of constant temperature, heat flow, work, etc.) d) Calculate the thermal efficiency of the cycle.
what is thermodynamic second law?
Thermodynamics Instructions: ANSWER ONLY LETTER (C) *show complete solutions and please write legibly. TY
Introduce the second law of thermodynamics?
As shown in the figure, Refrigerant 22 enters the compressor of an air conditioning unit operating at steady state at 40°F, 80 lbp/in² and is compressed to 160°F. 200 lb/in?. The refrigerant exiting the compressor enters a condenser where energy transfer to air as a separate stream occurs, and the refrigerant exits as a liquid at 200 lb/in², 90°F. Air enters the condenser at 75°F, 14.7 lb/in² with a volumetric flow rate of 1000 ft3/min and exits at 110°F. Neglect stray heat transfer and kinetic and potential energy effects, and assume ideal gas behavior for the air. Step 1 Compresser 1+R22 Hint Step 2 mg22 = 7.026 7-11 wwwww www Wa= 7₂=160 F P-200 7₁-4FF P-80² Your answer is correct. Determine the mass flow rate of refrigerant, in lb/min. Determine the mass flow rate of refrigerant, in lb/min, and the compressor power, in horsepower. * Your answer is incorrect. 2.125 -Condemer lb/min Determine the compressor power, in horsepower. Aus at T P 1471² (AV) 7₁-90°F Py = 200 m² hp P == 300…
A steady-state system for producing power consist of a pump, heat exchanger and a turbine. Water at 1.0 bar and 20°C (state 1) enters the adiabatic pump and leaves at 10 bar (state 2). The pump draws 110 kW of power, and the mass flow rate of water is 45 kg/s. The water leaving the pump enters a heat exchanger and heated at constant pressure to 400°C (state 3) using exhaust gases (Cp of gases = 1.1 kJ/kgK) that enters at 500°C and exits at 182°C. The steam is adiabatically expanded in a turbine having an isentropic efficiency of 0.71. The turbine exhausts (state 4) to the surroundings at 1.0 bar. What is thermal efficiency of this power production process? If the pump and turbine are reversible, would the efficiency of this system equal the maximum possible efficiency? (Answer Yes or NO and provide a short explanation.)
Please explain each step
2 kg of Refrigerant-134a contained in a piston-cylinder device undergoes a reversed Carnot cycle. Some important information about the cycle is: ● At the beginning of the adiabatic compression (State 1), the refrigerant is a saturated vapor. ● The adiabatic compression ends when the temperature of the refrigerant is 30 degrees C● The refrigerant is 50% vapor by mass at the end of the isothermal heat rejection process. ● The adiabatic expansion process ends when the pressure of the refrigerant is 132.82kPaConsulting example 7-6 in your text might be helpful in understanding some aspects of this problem. a) Represent this cycle on a T-S diagram. On your diagram, clearly indicate the values of the specific entropy and temperature at every state. b) Explain (briefly) why the process curves take the shapes you indicated on your T-S diagram in part a.
The components of a Steam Power Plant are Boiler, Turbine, Pond, Pump Boiler, Turbine, Condenser, Pump Boiler, Turbine, Condenser, Motor Boiler, Gas turbine, Condenser, Pump
Thermodynamics

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