16-7M An air-standard Carnot cycle operates between temperatures of 300 and 900 K. The minimum pressure in the cycle is 1 bar. Determine the maximum pressure in the cycle, in atmospheres, if the heat rejection is (a) 60 kJ/kg, and (b) 40 kJ/kg.
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- An air-standard cycle with variable specific heats is executed in a closed system with 0.0045 kg of air and consists of the following three processes: 1–2 v = Constant heat addition from 95 kPa and 17°C to 380 kPa 2–3 Isentropic expansion to 95 kPa 3–1 P = Constant heat rejection to initial state Use data from tables. Calculate the thermal efficiency % ? Hint : The answer should be a percentage16-8M An air-standard Carnot cycle operates between temperatures of 300 and 1100 K. The mini- mum pressure in the cycle is 1 bar. Determine the maximum pressure in the cycle, in atmospheres, if the amount of heat supplied is (a) 120 kJ/kg, and (b) 150 kJ/kgRequired information Problem 09.015 - 3-Step Air-Standard Cycle with Constant Specific Heats - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS An air-standard cycle with constant specific heats at room temperature is executed in a closed system with 0.003 kg of air and consists of the following three processes: 1-2 v= Constant heat addition from 95 kPa and 17°C to 380 kPa 2-3 Isentropic expansion to 95 kPa 3-1 P = Constant heat rejection to initial state The properties of air at room temperature are cp = 1.005 kJ/kg-K, cy= 0.718 kJ/kg-K, and k = 1.4. Problem 09.015.b - Net Work for Constant Heat Capacity Air-Standard Cycle Calculate the net work per cycle, in kJ. (You must provide an answer before moving on to the next part.) The net work per cycle is kJ.
- Required information Problem 09.015 - 3-Step Air-Standard Cycle with Constant Specific Heats - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS An air-standard cycle with constant specific heats at room temperature is executed in a closed system with 0.003 kg of air and consists of the following three processes: 1-2 v= Constant heat addition from 95 kPa and 17°C to 380 kPa 2-3 Isentropic expansion to 95 kPa 3-1 P=Constant heat rejection to initial state The properties of air at room temperature are cp=1.005 kJ/kg-K, cv=0.718 kJ/kg-K, and k=1.4. Problem 09.015.c - Cycle Efficiency for Constant Heat Capacity Air-Standard Cycle Determine the thermal efficiency. The thermal efficiency is %.in an air standard dual cycle two –thirds of the total heat supply occurs at constant volume . The state at the beginning of the compression process is 90kPa and 20°C and the compression ratio is 9. if the total heat supply is2100kJ/kg, (a) determine the maximum pressure of the cycle (b) determine the maximum temperature of the cycle4. Plot the cycle diagram for the air-standard Carnot cycle operating with 1 lbm of working fluid between 60 and 400 °F, if the maximum volume reached in the cycle is 1 ft3 and the maximum pressure in the cycle is 2000 psia. Plot the P-v, T-s, P-h, and h-s diagrams. Assume that the specific heat of air can be taken as temperature-independent.
- An air-standard cycle with variable specific heats is executed in a closed system with 0.0055 kg of air and consists of the following three processes: 1–2 v = Constant heat addition from 95 kPa and 17°C to 380 kPa 2–3 Isentropic expansion to 95 kPa 3–1 P = Constant heat rejection to initial state Use data from tables. Determine the thermal efficiency. The thermal efficiency is %Consider an air-standard Otto cycle that has a compression ratio of 8 and a heat addition of 1330 kJ/kg. If the pressure and temperature at the beginning of the compression process are 0.1 MPa and 70 °C, determine Match each item to a choice: Q the maximum pressure for the cycle, the net work output, in kJ/kg, the maximum temperature for the cycle the mean effective pressure,! Required information Problem 09.015 - 3-Step Air-Standard Cycle with Constant Specific Heats - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS An air-standard cycle with constant specific heats at room temperature is executed in a closed system with 0.003 kg of air and consists of the following three processes: 1-2 v= Constant heat addition from 95 kPa and 17°C to 380 kPa 2-3 Isentropic expansion to 95 kPa 3-1 P=Constant heat rejection to initial state The properties of air at room temperature are cp=1.005 kJ/kg-K, cv=0.718 kJ/kg-K, and k=1.4. Problem 09.015.a - P-v and T-s Diagrams for Constant Heat Capacity Air-Standard Cycle Show the cycle on P-v and T-s diagrams. (Please upload your response/solution using the controls provided below.) (You must provide an answer before moving on to the next part.) upload a response file (15MB max) Browse... No file selected. save
- A thermodynamic cycle uses 0.5 kg of air works in a three-process air-standard power cycle:Process 1-2: Isothermal expansionProcess 2-3: Constant volumeProcess 3-1: Isentropic, k=1.4Given: Pressure and temperature at the end of constant volume process is P3=100 kPa andT3=300K, respectively. If the isentropic compression ratio is 6.0, determine:(a) The pressure, volume and temperature at each state points of the cycle.(b) The heat added and rejected throughout the cycle, in kJ(c) The work net output, in kJ(d) The thermal efficiency.(e) Illustrate the cycle in Pv and Ts coordinates.(Ans. Q1-2=157.95 kJ, Q2-3=-112.93 kJ, Q3-1=0, 45 kJ, 28.5%) Just answer D and EThe intake air to an ideal Otto cycle has a maximum volume of 0.004 m3 at 27 o C and 101 kPa. If the displacement volume is 0.0035 m3 and the heat rejected from the cycle is 605 J, run an analysis to determine the following; 1- All volumes, pressures, and temperatures for all states. 2- The total heat added to the cycle, Qin 3- The total heat rejected from the cycle, Qrej 4- The total work done by the cycle, Wnet 5- The thermal efficiency of the cycle, ηthConsider an air-standard Otto cycle. At the beginning of the compression process, the pressure and temperature are 100 kPa and 300 K. The displacement volume is 2 liters, compression ratio is 10 and the pressure at the end of the combustion is 4 times the pressure at the end of the compression.Use cold-air standard calculations and determine the net work per cycle, in kJ and the thermal efficiency of the cycle