Air contained in a piston-cylinder assembly undergoes the power cycle shown in the figure below. 4.5 Isothermal P. process (bar) 1.2 - 3 0. 1.0 3.75 v (m/kg) Assuming ideal gas behavior for the air, evaluate the thermal efficiency of the cycle.
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- A certain refrigerator requires 31.0J of work to remove 150J of heat from its interior. 1. What is the coefficient of performance? 2. How much heat is rejected to the surroundings at 21C? 3. If the refrigerator cycle is reversable, what is the temperature inside the refrigerator?Volech 28. A monatomic ideal gas initially at pressure Po = 10° Pa, volume Vo = 0.01 m³, and temperature To = 300 K is taken through the cycle shown in the figure. p %3D ЗР. a. Determine the change in internal energy from point A to point B. b. Determine the work done by the gas from point B to point C. Po c. Determine the heat released by the gas from point C to point D. d. Determine the net work done by the gas and the net heat absorbed by the gas. Vo 3V bhe s on theThe pV diagram in (Figure 1) shows the cycle followed by the gas in an ideal-gas refrigerator whose coefficient of performance is 1.5. The work done by the system during two adiabatic processes is shown. Figure P 4 Adiabats 1 of 1 > W₁ = -119 J W, = 79 J V ▼ ✓ Correct Part F What is Win for one cycle of this heat engine? Express your answer with the appropriate units. View Available Hint(s) Win = 119 μÅ Submit Previous Answers Request Answer Part G Complete previous part(s) J X Incorrect; Try Again; One attempt remaining Part H Complete previous part(s) Provide Feedback ?
- A heat engine does 30.0 J of work and exhausts 35.0 J of waste heat during each cycle. Part A What is the engine's thermal efficiency? Express your answer as a percentage. 46.2 % Submit Correct Part B Previous Answers If the cold-reservoir temperature is 30.0 °C, what is the minimum possible temperature in °C of the hot reservoir? Express your answer in degrees Celsius. —| ΑΣΦ 383.35 ? °C3. A diesel engine performs 2200 J of mechanical work and discards 4300 J of heat each cycle. (i) How much heat must be supplied to the engine in each cycle? (ii) What is the thermal efficiency of the engine?3. A diesel engine performs 2200 J of mechanical work and discards 4300 J of heat each cycle. (a) How much heat must be supplied to the engine in each cycle? (b) What is the thermal efficiency of the engine?
- Required information Problem 09.112 - Brayton Cycle with Regeneration using Variable Specific Heats - DEPENDENT MULTI- PART PROBLEM - ASSIGN ALL PARTS A Brayton cycle with regeneration using air as the working fluid has a pressure ratio of 7. The minimum and maximum temperatures in the cycle are 310 and 1150 K. Assume an isentropic efficiency of 75 percent for the compressor and 82 percent for the turbine and an effectiveness of 64 percent for the regenerator. Use variable specific heats for air. Problem 09.112.a - Air Temperatre of the Turbine Exit in a Brayton Cycle with Regeneration Determine the air temperature at the turbine exit. (You must provide an answer before moving on to the next part.) The air temperature at the turbine exit is K.6. A Carnot engine operates between reservoirs at temperatures T. and Ty and performs an amount of work W per cycle. Expressed in terms of these variables, what are the amounts of heat input and exhaust-heat output per cycle?