7. A piston-cylinder assembly undergoes a cycle consisting of the following three processes:Process 1-2: Compression with constant internal energyProcess 2-3: Constant-volume cooling to p3100 kPa, V₂ = 0.1 m³Process 3-1: Constant-pressure expansion with W31 = 12 kJSketch the cycle on a p-V diagram, labeling each of the states and indicating the process directions witharrows. If the work for the entire cycle is Wcycle = -20 kJ and changes in kinetic and potential energyare negligible, determine:a) The volume at state 1 [0.2 m²]b) The work and heat transfer for process 1-2 [-32 kJ, – 32 kJ]c) Is this cycle a power cycle or a refrigeration cycle? Explain.

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Answered: A piston-cylinder assembly undergoes a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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P (kPa) V (m³) A thermodynamic cycle consisting of three processes is shown above: Process 1 to 2: Adiabatic expansion with pV" = constant (n = 1.4). Process 2 to 3: Constant volume, V = 1 m³, U3- U2 = 52.2 kJ Process 3 to 1: Constant pressure, p = 5 bar, W31 = -100 kJ %3D Part a.) Label the P-V diagram with all pressures and volumes. Part b.) Make a table of known values. Q (in) kJ w (out) kJ AU kJ Process 1-2 2-3 3-1 Cycle (Total) Part c.) Is this a refrigeration or power cycle?
An ideal gas contained in a piston-and-cylinder device undergoes a thermodynamic cycle made up of three quasi-equilibrium processes. Step 1-2: Adiabatic compression from 330 K and 9.35 atm to 12.58 atm Step 2-3: Isobaric cooling Step 3-1: Isothermal expansion a.) Carefully draw this process in a traditional piston-and-cylinder schematic b.) Sketch the process path for this cycle on a PV Diagram. Put a point on the diagram for each state and label it. Be sure to include and label all the important features for a complete PV diagram for this system.
A gas contained within a piston–cylinder assembly undergoes a thermodynamic cycle consisting of three processes:Process 1–2: Compression with pV = constant from p1 = 1 bar, V1 = 1.0 m³ to V2 = 0.2 m³Process 2–3: Constant-pressure expansion to V3 = 1.0 m³Process 3–1: Constant volumeSketch the cycle on a p–V diagram labeled with pressure and volume values at each numbered state.
The working gas of a thermodynamic cycle is air. The gas originally starts at 100kPa, 1m³ and 27°C First, the pressure of the gas is doubled keeping the volume fixed. Second, the volume of the gas is doubled at constant pressure. Third, the gas undergoes an adiabatic expansion. Fourth, the gas undergoes an isothermal contraction back to its original state a) Make a table of the pressure, volume, and temperature 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 during each leg of the cycle. ● ● c) Draw P-v and T-s diagrams, indicating P, V & T at the start of each process & AU, Q, W, AH & AS for each leg. d) Calculate the thermal efficiency of the cycle.
Q1: Select at least five different thermodynamic cycles/processes and make the P-v and T-v phase change diagrams. Also briefly explain the working of each cycle/process.
Derive the 7 General Property equation of the following thermodynamic processes: 1. Isometric Process
Specific Instruction: i.Drawaschematic diagramof each problem with labels of states of a substance;ii.For uniformity purposes, assign STATE 1 at the inlet of ahigh-pressure turbine.The states must be arranged in a chronologicalorder;iii.Ploteach cycle in a t-s diagramwith the states consistentto the states assignment in the schematic diagram;iv.Show a detailed solution 1.Consider a 200-MW steam power plant that operates on a simple ideal Rankine cycle. Steam enters the turbine at 8MPa and 400 0C and is cooled in the condenser at a pressure of 10 kPa. Determine (a) the quality of the steam at the turbine exit, and (b)themass flow rate of the steam.
Air within a piston-cylinder assembly executes a Carnot heat pump cycle, as shown in the figure below. For the cycle, TH = 500 K and Tc = 300 K. The energy rejected by heat transfer at 500 K has a magnitude of 1000 kJ per kg of air. The pressure at the start of the isothermal expansion is 325 kPa. Tc. p-v diagram for a Carnot gas refrigeration 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.
Referring to the reversible heat pump cycle shown in the figure, p1 = 14.7 Ibf/in?, p4 = 27.8 lbf/in?, v1 = 12.6 ft³/Ib, v4 = 8.0 ft³/lb, and the gas is air obeying the ideal gas model. P4 pi TH V4 VI Determine TH, in °R, and the coefficient of performance. Step 1 Determine TH, in °R. TH = °R Save for Later Attempts: 0 of 1 used Submit Answer Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above.
Air within a piston-cylinder assembly executes a Carnot heat pump cycle, as shown in the figure below. For the cycle, TH = 600 K and Tc = 300 K. The energy rejected by heat transfer at 600 K has a magnitude of 1000 kJ per kg of air. The pressure at the start of the isothermal expansion is 325 kPa. p-v diagram for a Carnot gas refrigeration 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.
Describe the T-s diagrams accordingly by filling in the blanks. Use the sets of words given below for the correct description. reheat/ closed Ideal / Actual / vapour /cycle /Carnot/ Rankine/ Brayton/Ericsson/Stirling/regenerative/ open/with/a Nino To C @ 4 2. 5. 6. a b с e T f 1 4 In a two-stage gas turbine plant, with reheating after the first stage TA 25 decreases the thermal efficiencies. increases the thermal efficiencies. does not affect thermal efficiencies. Decreases the work ratio. increases the work ratio. does not affect the work ratio. equal. unequal. 2 5 The ideal compressor work and turbine work in a jet-propulsion engine is a b 9in 2/ qout Wpump.in High-pressure turbine 3 Reheating 6 Wturb,out Low-pressure turbine с not related to each other. d unpredictable (a) By writing an energy balance on the heat exchanger of a binary vapour power cycle, obtain a relation for the exit enthalpy regarding the mass flow rates of two fluids in terms of the other enthalpies. Take the…
The following processes occur in a reversible thermodynamic cycle: 1-2: 0.2 kg heating at constant pressure 1.05 bar at specific volume 0.1 m3/kg and work done -515 J. 2-3: Isothermal compression to 4.2 bar. 3-4: Expansion according to law pv1./= constant. 4-1: heating at constant volume back to the initial conditions. Using file 3, which figure number is associated the process? ?

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