Air within a piston-cylinder assembly executes a Carnot heat pump cycle, as shown in the figure below. For the cycle, TH = 400 K andTc = 300 K. The energy rejected by heat transfer at 400 K has a magnitude of 625 kJ per kg of air. The pressure at the start of theisothermal expansion is 325 kPa.Tcp-v diagram for a Carnot gasrefrigeration or heat pump cycle.Assuming the ideal gas model for the air, determine:(a) the magnitude of the net work input, in kJ per kg of air, and(b) the pressure at the end of the isothermal expansion, in kPa.

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Answered: Air within a piston-cylinder assembly…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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I need help with the diagnrams for this thermo practice problem 2 kg of air in a piston cylinder initially at P1=101 kPa, T1= 300 K undergoes a cycle made up of three processes: 1-2 Isothermal compression until the volume is (1/15) of its original value.2-3 Constant Pressure heating3-1 Isentropic Expansion back to the initial state Assume air is an ideal gas with constant specific heats with the following values: Cpo=1.027kJ/kgK; Cvo= 0.740 kJ/kgK; R=0.287 kJ/kgK; ɣ=1.388 Sketch this cycle on a P-v diagram and on a T-s diagram, clearly indicating all state points and the three processes.
A cycle operates on air occurs as follows: an isentropic compression 1-2, a constant-pressure expansion 2-3, an isentropic expansion 3-4, and finally a constant volume cooling 4-1. The ratio of compression is 14, the ratio of expansion during constant-pressure expansion is 2, P1=47kPa, T1=32o C, V1=0.2m3. a. Find the heat added b. Find the heat rejected c. Find the work on each process and the net work
An engine has the Lenoir thermodynamic cycle as shown in the figure. Given: 1 mol of ideal gas CP,m = 3.5 R P1 = 2 atm ; P2 = 5 atm V1 = 3000 cm3 ; V3 = 6000 cm3 Find the following: Temperature at (P1, V1), (P2, V2), and (P2, V1) QH and Qc (Note; QH comes from Process 1->2; Proces 2-3 is considered isentropic efficiency of the engine
Hi. Pls help me. Pv and ts diagram pls. Thanks!
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Hi I need help with parts of a thermo practice problem 2 kg of air in a piston cylinder initially at P1=101 kPa, T1= 300 K undergoes a cycle made up of three processes: 1-2 Isothermal compression until the volume is (1/15) of its original value.2-3 Constant Pressure heating3-1 Isentropic Expansion back to the initial state Assume air is an ideal gas with constant specific heats with the following values: Cpo=1.027kJ/kgK; Cvo= 0.740 kJ/kgK; R=0.287 kJ/kgK; ɣ=1.388 Fill in the processes table below and show all work.
104#1. an ideal gas with R=0.062 BTU/lbm-degree R and Cv=0.158 BTU/lbm-degree R undergoes athree process cycle in a cklose system. from the initial state of 20 psia and 570degree R, the gas is compressed at coinstant pressure to 1/5 of its initial volume, process 1-2; it is then heated isochrocally to state 3, process 2-3; and finally, it expands polytopically with index n=1.5 back to its initial state, process 3-1. determine the pressure, specific volumes and temperatures at cardinal points around the cycle and the cycle thermal efficiency.
A steam power-plant, with a power of "Wnet", is working according to the Rankine cycle. Steam enters the system in "P3"MPa pressure and 500 C degree temperature, and cooled down in condenser at 10 kPa pressure. Take Source temperature as "TH", and sink temperature 290 K. According to the information given. P3 = 6 MPa, %3D Wnet = 201 MW, TH = 1600 K Determine: 1.Heat generated (MW)(Not Heat given) 2.Pump entrophy generation (MW/K) 3.Combustion chamber entrophy generation (MW/K) 4.Turbine entrophy generation (MW/K)
Problem: The drawing (not to scale) shows the way in which the pressure and volume change for an ideal gas that is used as the working substance in a Carnot engine. The gas begins at point A (pressure = PA, volume = VA) and expands isothermally at temperature T until point B (pressure = PB, volume = V B) is reached. During this expansion, the input heat of magnitude Qn enters the gas from the hot reservoir of the engine. Then, from point B to point C (pressure Pc. volume = Vc), the gas expands adiabatically. Next, the gas is compressed isothermally at temperature T. from point C to point D (pressure = PD, volume = VD). During this compression, heat of magnitude Q. is rejected to the cold reservoir of the engine. Finally, the gas is compressed adiabatically from point D to point A, where the gas is back in its initial state. The overall process A to B to C to D to A is called a Carnot cycle. Prove The work done during the cycle equals the area enclosed by the path on the PV diagram. B…
A six-cylinder engine, 4.2 liters 4 strokes supercharged, operating at 5100 rpm has a volumetric efficiency of 90 % (referred to the intake conditions, state 3). The compressor has an adiabatic efficiency of 89% and a mechanical efficiency of 82% in its link with the engine (see the figure below). The compressed air is delivered to the engine cylinders at 59°C and 1.85 bar (intake conditions). The ambient conditions are 20°C and 1 bar (at the inlet of the compressor). Take the gas constant 287 J/kg.K for air, the specific heat Cpair = 1.005 kJ/kg.K and the specific heat ratio k = 1.31 After-cooler Pz " P3 2 3 Engine N. T The temperature of air at the exit of the compressor is (K): Choose. The mass flow rate of the air is (kg/s): Choose. The rate of heat rejection from the after-cooler (intercooler) is (kW) Choose. The power consumed by the compressor is (kW): Choose: The power consumed by the engine to drive the supercharger is (kW): Choose.

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