Take cp 1.004 kJ/kg.K, c0.718 kJ/kg.K, k 1.4 for all problems that include gas cycles.
NAME (PRINT): 1. Air (ideal gas with k = 1.4 and Cp = 1.004) enters the steady-state operating compressor at P1 = 100 kPa and T1 = 17C, compressed adiabatically, and exits at P2 = 330kPa and T2 = 147C. KE and PE can be neglected. Determine (solution process required): a) Isentropic efficiency of the compressor (6 pts) rate of entropy generation per kg of air flow (5 pts).
An argon (Cp= 0.518 KJ/kg.k, and K= 1.67) has velocity V =750m/s, pressure P = 120 kPa, and temperature T = 175 C. If the argon is at stagnation state, calculate the pressure (P0) and temperature (T0).
A concentric-pipe parallel-flow heat exchanger is to heat water (cp = 4.18 kJ/kg.K) from 20°C to 80°C at a rate of 1.2 kg/s. The heating is to be accomplished by geothermal water (Cp =4.31 kJ/kg.K) available at 160°C at a mass flow rate of 2.0 kg/s. The inner pipe is thin-walled and has a diameter of 1.5 cm. If the overall heat transfer coefficient of the heat exchanger is 640 W/m2.K, determine the length of the pipe required to achieve...
Participation Problem 6-4 Assuming ideal gas and constant Cp, calculate Δ S (in kJ/( from 200 K to 800 K while changing the pressure from 2000 kPa to 1000 kPa. kg.K)) for a process where nitrogen is heated Numeric Answer
1. (10 pts) A 10 m® rigid storage tank contains oxygen gas (R = 0.2598 kJ/kg.K, Cp = 0.918 kJ/kg.K, cv = 0.658 kJ/kg.K). The tank is initially 200 kPa and 600° It is cooled to 25°C in 35 minutes. Determine: 1. (3 pts) The mass of oxygen in the tank, in kg. 2. (3 pts) The final pressure in the tank, in kPa. 3. (4 pts) The rate of heat transfer from the oxygen, in kW.
A gas with cp = 0.950 kJ/kg-K enters an insulated nozzle at 30oC and a velocity of 8 m/s. The gas exits at a velocity of 100 m/s. Assuming constant specific heats and ideal gas behavior, what is the exit temperature of the gas?
Analyze a Diesel cycle using a constant specific heat air standard model (cP = 1.004 kJ/kg-K, R = 0.287 kJ/kg-K) with the following properties: The temperature and pressure at the beginning of the compression stroke are 300 K and 100 kPa, the compression ratio is 22, and the specific heat addition is 800 kJ/kg. Find the thermal efficiency, cut off ratio, maximum temperature in the cycle, and maximum pressure in the cycle.
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg K) is contained in the piston-cylinder device shown. Initially, the vol- ume is 50 cm3 and the temperature is 20°C. How much heat must be added to double the volume if the final pressure and temperature are 400 kPa and 1000 K respectively. g·K) and Cu- Ideal gas Linear spring
For air, y- 1.4, cp 1.005 k]/kg K, R- 0.287 kJ/kg K unless stated in question. 1. Air flows adiabatically through a duct. At point 1 the velocity is 240m/s, with T1 - 320 K and p1 170 kPa. Compute i. To ii. (Mach number) ii. At point 2 further downstream V2-290 m/s and P2-135 kPa. What is the stagnation pressure Po2 Hints: Given the properties it is easy to solve for the Mach number using the following formulas To/T...
A jet engine propels an aircraft at 254 m/s through air at 39 kPa and 273 K. The compressor pressure ratio is 9 and the temperature at the turbine inlet is 873 K. a) Determine the temperature of the air as it enters the exit nozzle. Give your answer in Kelvin to 2 decimal places Assume ideal operation for all components and constant specific heats at room temperature. Take the properties of air at room temperature to be R =...