In an internal combustion engine, 2/3 of the heat supply takes place at constantvolume and 1/3 at constant pressure. The other three condition changes of theengine are two isotropes and one isochore. The compression ratio (Va / Vb) is 10and the cycle's highest and lowest pressures are 45 bar and 0.9 bar respectively.Work medium is an ideal gas with k = 1.35. All state changes are reversible.Calculate the thermal efficiency.gicdT4d.qibceEcEceaSV

Answered: Image /qna-images/answer/640a4ee1-9cd6-4d84-bfc7-11620178ce54.jpg

Answered: In an internal combustion engine, 2/3…

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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Thermodynamics subject power cycles. Show the ts diagram and complete and step by step solution. Bix the final answer.
Thermodynamics problem. Answer letter G to I only.
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.
Give solution to the thermodynamics problem.
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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.
A steam at 15 bar specific volume is 0.1317 compressed reversibly to a pressure of 30 bar according to a law pvn=constant. The steam is then heated reversibly at constant volume until the pressure is 40 bar; the specific volume is then 0.08 m3/kg. reversible expansion according to a law pv2=constant restore the steam to its initial state. Sketch the cycle on p-v diagram and calculate : A- The value of n in the first process . B- The network .of the cycle
The compression ratio of an engine working on the constant volume cycle is 9.3. At thebeginning of compression, the temperature is 31°C and at the end of combustion thetemperature is 1205°C. Taking the compression and expansion process to be adiabatic andthe value of k as 1.4. Determine the following a. T2. 741.7657 Kb. T4. 605.733 Kc. Thermal Efficiency. 59.02%
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 625 kJ per kg of air. The pressure at the start of the isothermal expansion is 325 kPa. Part A 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. |Wcycle/m| = i TH Save for Later 4 Assuming the ideal gas model for the air, determine the magnitude of the net work input, in kJ per kg of air. kJ/kg p-v diagram for a Carnot gas refrigeration or heat pump cycle. Attempts: 0 of 5 used Part B The parts of this question must be completed in order. This part will be available when you complete the part above. Submit Answer
Give solution to the thermodynamics problem.
Ts diagrams for two reversible thermodynamic power cycles are shown in the following fig- ure. Both cycles operate between a high temperature reservoir at 500 K and a low temperature reservoir at 300 K. The process on the left is the Carnot cycle described in Section 2.9. The process on the right is a Brayton cycle, which is similar to a Carnot cycle, except that the two steps (state 1 to state 2) and (state 3 to state 4) are at constant pressure. Which cycle, if either, has a greater efficiency? Explain.
submission process. A power plant has a turbogenerator, operating at steady state with an input shaft rotating at 1800 RPM with a torque of 16,700 N m. The turbogenerator produces current at 230 amp with a voltage of 13,000 V. The rate of heat transfer between the turbogenerator and its surroundings is related to the surface temperature Tp and the lower ambient temperature To and is given by Q = - h A (Tb - To), where h = 100 W/m2.K, A = 25 m2, and To = 298 K. (a) [10] Determine the temperature Tb, in K. (b) [10] For the turbogenerator as the system, determine the rate of entropy production, in kW/K. Turbine Turbogenerator Turbogenerator input shaft Steam inlet Electricity i = 230 amp Voltage = 13,000 V w = 1800 RPM Torque = 16,700 N-m Steam exit

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