CancelRESETAO16-4M A proposed air-standard cycle begins at 1.1 bars, 37°C, and 0.808 m³/kg. Process 1-2 is isentro-pic compression to 3.2 bars: process 2-3 is constant-pressure heating to 1050 K and 0.940 m²/kgprocess 3-4 is constant-volume cooling to 1.1 bars; process 4-1 is constant-pressure cooling to theinitial state.(a) Sketch Po and Ts diagrams of the cycle.down(b) Determine the amount of heat added and the net work output, in kJ/kg(c) Compute the thermal efficiency.(d) What is the Carnot efficiency for a heat engine with the same maximum and minimumtemperatures as the above cycle? Use air-table data....Done

This question is based on the concept of power plant and thermodynamics. As per the guidelines we…

Answered: 16-4M A proposed air-standard cycle…

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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Air within a piston-cylinder assembly executes a Carnot heat pump cycle, as shown in the figure below. For the cycle, TH = 400 K and Tc = 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 the isothermal expansion is 325 kPa. TH Te 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.
IMPORTANT: For problem solving items, start your solution by presenting the cycle in P-v and T-s diagrams. Label all points and mark the process where the heat is added and rejected. Also mark the area showing the net work of the cycle. The parameters of the initial state of one kilogram of air in the cycle of an internal combustion engine are o.095 MPa and 65 deg.C. The compression ratio is 12. Compare the values of the thermal efficiency for isobaric and isometric heat supply in the amounts of 820 kJ.
A four-cylinder compression-ignition engine with a compression ratio of 18 haspistons with a bore of 9 cm and a stroke of 10 cm. The air pressure at the beginning ofcompression is 98 kPaa, and the temperature is 37 oC. The engine may be modeled bythe air-standard Diesel cycle. The maximum cycle temperature is 1700 oK. If the engineproduces 75 kW of power, determine a) the heat supplied per cylinder; b) the thermalefficiency; and c) the rpm required.
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
A 3L, 4-cylinder gasoline engine produces 150 kW at 4,500 rpm when the operating standard condition are 1 bar and 30 °C. The compression ratio of the engine is 9, the heating value of the fuel is 44,400 kJ/kg and the mechanical efficiency is 73%. The engine is brought to an Industrial Plant 3,500 ft above sea level which presented a volumetric efficiency of 70 % at 10.3 kgair/kgfuel. At this condition, find: a) brake power, kW b) brake engine efficiency, % c) PmB kPa d) Mechanical Efficiency, %
questão1. Refrigerator 1 simulates an ideal refrigerator and therefore operates on a Carnot cycle using R-134a as the refrigerant at a flow rate of 1.4 kg/sec. The condensing and evaporating temperatures are 30 °C and -10 °C, respectively. To assess the performance of Refrigerator 1, you must submit the report. of the project with the following information: Enthalpies corresponding to the states indicated in the cycle (1, 2, 3 and 4); 1.a. The cooling rate (QL); 1.b. The work provided to the fluid by the compressor; 1.c. The work generated by the turbine; 1.d. The condenser heat rejection rate (QH); 1e. The coefficient of performance of the cycle;
A Carnot power cycle operates on 3lb of air between the limits of 8000F and 6000F. Thepressure at the beginning of isothermal expansion is 400 psia and at the end of isothermal expansionis 195 psia. Determinea. the volume at the end of isothermal compression,b. ∆S during an isothermal process (the ratio of compression during isothermal heating andthe overall ratio of expansion,c. Compute the heat added (QA), heat rejected (QR), work (W) and cycle efficiency (full solution pls)
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.
Consider a cylinder of a gasoline engine at the beginning of the compression cycle, duringwhich a fuel/air mixture (for our purposes mostly composed of nitrogen and oxygen, i.e.an ideal gas of diatomic molecules) at 300 K and 1 bar is compressed down to one-tenthvolume (compression ratio of 10:1). Assume that the compression is rapid so no heatexchange occurs with the environment. Calculate the pressure and the temperature ofthe compressed gas. In a diesel engine, the compression ratios are typically much higher;redo the same calculation with a compression ratio of 20:1.
1. An engine with a cylinder volume of 250 cc and a volume at top dead centre of 25 cc uses a thermal cycle where the initial stage is an isentropic adiabatic compression process with the equation pvY = C. It is known that the initial conditions are 1 bar and 30°C. After that, a combustion process takes place in which heat is supplied at a constant volume. The heat given is 80 KJ/kg and if the specific heat at constant volume is known to be 0.718 kJ/kg K, determine the maximum temperature and pressure that occur? 2. Air with a mass of 3 kg is heated at constant volume from 25°C to 120°C. The process then takes place at constant pressure so that the gas has a temperature of 550°C. Determine the heat required and the entropy change that occurs during the process? (Air: Cp = 1.005 kJ/kg.K and y = 1.4; and assume Cp does not change with temperature). Known that initial volume is 50 ml and the last volume is 300 ml.
A certain refrigerator has a COP of 5.00. When the refrigerator is running, its power input is 500 W. A sample of water of mass 500 g and temperature 20.0°C is placed in the freezer compartment. Assume all other parts of the refrigerator stay at the same temperature and there is no leakage of energy from the exterior, so the operation of the refrigerator results only in energy being extracted from the water. -->Compare the cost to make 44 kg of ice using two different refrigerators; one has a COP of 5.00 and the other has a COP of 6.00. Electricity costs $0.10 per kWh. Using the same assumptions given in the example, find the cost difference (in dollars) between the refrigerators to freeze the water.
Define the adiabatic process?

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