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Air enters the compressor of a regenerative gas-turbine engine at 300 K and 100 kPa, where it is compressed to 800 kPa and 580 K. The regenerator has an effectiveness of 72%, and the air enters the turbine at 1200 K. For a turbine efficiency of 86%, determine (a) the amount of heat transfer in the regenerator and (b) the thermal efficiency of the cycle. 3. Consider a gas-turbine cycle with two stages of compression and two stages of expansion. The pressure ratio across each stage of the compressor and turbine is 3. The air enters each stage of the compressor at 300 K and each stage of turbine at 1200 K. The isentropic efficiency for each compressor stage is 80% and the isentropic efficiency for each turbine stage is 85%. Determine the back work ratio and the thermal efficiency of the cycle, assuming (a) no regenerator is used and (b) a regenerator with 75% effectiveness is used. 4. Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kPa and 17oC. The system uses a regenerator as well as reheating and intercooling. The pressure ratio across each compressor is 4. 300 kJ/kg of heat are added to the air in each combustion chamber. The regenerator increases the temperature of the cold air by 20oC. Determine the thermal efficiency of the system assuming isentropic operations for all compressor and turbine stages and using constant specific heats at room temperature.
air is made up of nitrogen oxygen carbon dioxide argon water vapor and some other stuff in really small amounts. list
an insulated rigid tank initially contains 1.5 lbm. of helium at 80 deg f and 50 psi. a paddle wheel with a power
a nuclear power plant has an electrical power output of 1800 mw and operates with an efficiency of 30. if excess
air enters the 1.5 m2 inlet of an aircraft engine at 100kpa and 10degc with a velocity of 200ms. determine the volume
consider a cold canned drink left on a dinner table. would you model the heat transfer to the drink as one two or three
determine the location Yc of the centroid C of the beam cross sectional area . then compute the moment of inertia of the area about the x axis.
two refrigerators are arranged in series. one of them receives 300 kjcycle from a reservoir at 300 k. the heat
What is the concentration of FeCl3 in a solution prepared by dissolving 20.0 g of FeCl3 in enough water to make 275 mL of solution?
A collar B of weght W can move freely along thevertical rod. The constant of the spring is k and the spring is unstretched when theta=0. Derive an equation in W thrta k and l that must be satisfied when h collar is in equilibrium.
Discuss five factors which you are going to consider before making a decision whether to accept or reject the offer and Prepare an organization structure
aif a rod of 1025 steel 0.5 m 19.7 in long is heated from 20 to 80 deg c 68 to 176 deg f while its ends are maintained
the metal rhodium has a fcc crystal structure. if the angle of diffraction for the 311 set of planes occurs at 36.12deg
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