Derive the air mass fraction relation as follows: (2pt) -R is gas constant, for steam R-0.4615 kJ/kg.Κ. for air R-0.287...
Derive the air mass fraction relation as follows: (2pt) -R is gas constant, for steam R-0.4615 kJ/kg.Κ. for air R-0.2870 kJ/kg. K 1m Define w+7 air steam Derive Known: Phamber , Ichcamber an steam air Assume that i) PohamberPrePotr steam ii) steam is saturated condition. Psteam P(Tsteam, sat chamber steam Derive the air mass fraction relation as follows: (2pt) -R is gas constant, for steam R-0.4615 kJ/kg.Κ. for air R-0.2870 kJ/kg. K 1m Define w+7 air steam Derive Known: Phamber...
Problem 1 0/5 points (0%) Consider a combined gas-steam power plant that has a net power output of 500 MW. The pressure ratio of the gas-turbine cycle is 12. Air enters the compressor at 308 K and the turbine at 1300 K. The combustion gases leaving the gas turbine are used to heat the steam at 9 MPa to 360°C in a heat exchanger. The combustion gases leave the heat exchanger at 460 K. An open feedwater heater incorporated with...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and a 2-kW baseboard electric resistance heater in the room is turned on and kept on for 15 min. The temperature rise of air at the end of 15 min is 2)An example of when it is appropriate to model a substance as an ideal gas is when a. The pressure and temperature are close to the critcal point b. The pressure and temperature are...
1. A rigid (constant volume) tank sealed by a valve initially contains 100 kg of air at a pressure of 100 kPa and 300 K. At time t = 0, the valve for the air tank is opened in a controlled manner and air leaks out isothermally (constant temperature) of the tank at a constant mass flow rate of 1 kg/s. The valve is closed after 75 seconds. Answer the following questions: Assuming air is an ideal gas, what is...
Air flows through a converging-diverging nozzle/diffuser. Assuming isentropic flow, air as an ideal gas, and constant specific heats determine the state at several locations in the system. Note: The specific heat ratio and gas constant for air are given as k=1.4 and R=0.287 kJ/kg-K respectively. --Given Values-- Inlet Temperature: T1 (K) = 360 Inlet pressure: P1 (kPa) = 583 Inlet Velocity: V1 (m/s) = 105 Area at inlet (cm^2) = 8.2 Mach number at the exit = 1.86 a) Determine...
Tutorial 1: Working Fluids and Vapour Tables Question 1: Calculate the specific volume, specific enthalpy and specific internal energy of wet steam at 18 bar and a dryness fraction of 0.9 Question 2: Calculate the dryness fraction, specific volume and specific internal energy of steam at 7 bar and with a specific enthalpy of 2600kJ/kg Question 3: Steam at 110 bar was found to have a specific volume of 0.0196 m²/kg. Calculate the temperature, specific enthalpy and specific internal energy...
T =1050 K P.950 kPa m-5k/s Q=12 kW Question 1 150 Points) Combustion gases that we can assume to be air enter a gas turbine at T-1050 K and P-950 kPa at a mass flow rate of 5 kg/s and leave the turbine at T 850 K and P-500 kPa. The heat lost to the surroundings at 25 °C is 12 kW. The flow through the turbine is steady state steady flow process. The air can be assumed to be...
Question 3 A rigid tank, of 0.5 m volume, contains an ideal-gas mixture at 300 K. The mixture is made up of 2.4 kg of gas A and 1.4 kg of gas B, the molecular weights of which are MA = 32.0 kg/kmole and M 28.0 kg/kmole, respectively. i. Determine the mass fraction of A and B. (3 marks] ii. Determine the mole fraction of A and B. [5 marks] iii. Determine the molecular weight of the mixture. [2 marks]...
Air flows through a converging-diverging nozzle/diffuser. Assuming isentropic flow, air as an ideal gas, and constant specific heats determine the state at several locations the system. Solve using equations rather than with the tables. Note: The specific heat ratio and gas constant for air are given as k=1.4 and R=0.287 kJ/kg-K respectively. --Given Values-- Inlet Temperature: T1 (K) = 353 Inlet pressure: Pl (kPa) = 546 Inlet Velocity: V1 (m/s) = 61 Area at nozzle inlet: A1 (cm^2) = 7.24...
Combined cycle power plants are common because of their high efficiency and scalability. They typically combine a gas turbine cycle (the Brayton Cycle) with a steam turbine cycle (the Rankine Cycle) [1]. The goal of this project is to determine the operating efficiency and profitability of a realistic combined cycle power plant. The power plant is as follows: 1. A natural gas-fired Brayton cycle with mÛ air,Br = 1.25 kg s−1 . (a) Ambient air at 1 bar and 300...