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a gas turbine engine based on a brayton cycle uses air as the working fluid that produces 5mw net power output. the air enters the compressor at 27 c and 100kpa.the pressure ratio across the compressor is 9 and the maximum temperature is 827c.the turbine and comprssor processes are adiabatic with turbine efficiency of 90% and a compressor efficiency of 85%. you may assume ideal gas with constant speific heatcp=1.0035 kj/kg-kand k=1.4
a- determine the cycle thermal efficiency
b- what is the lowest maximum cycle temperature at which the engine will run no net power out
A survey of similar facilities indicates that one parking space must be provided for every one employee and that 60% of all automobiles driven to work are compact automobiles, six percent of the spaces should be allocated for the handicapped.
a soil sample is obtained by pushing a 16 in long tube into the side of a pit. the tube has an inside diameter of 3 in. and weighs 1.8 lb. The soil in the tube is trimmed so that its ends are flush with the ends of the tube.
If the pipe lengths ar L1 = 3000ft, L2 = 2200, and L3 = 1600 ft the respective pipe diameters are 15,10, and 18in, and the surface water elevations of two of the three reservoirs are A = 125ft and B = 55ft, find the surface water elevation of Rese..
In a refrigeration system Refrigerant 22 enters the compressor at 150 kPa and -10 C. It leaves the compressor at 1.0 MPa and 90 C. Assume the mass rate of flow through the compressor is 0.016 kg/s
A 30mm pipe X 460 mm rectangular duct carries air. What size square conduit is needed to transport 4m cube per sec of water at a distance of 45m and head loss of of 1.08m.
Write the mass balance equation for a completely mixed lake with an impulse input of mass,M, added at time t=0. Assume the lake is of constant volume, V, with continuous outflow, Q, and a conservative substance.
The dissolved oxygen of sample water is 1.5 mg/L. At 25 C, the dissolved oxygen of the dilution water is 8.25 mg/L. You are told the BOD5 of the sample is 130 mg/L. You have a target final dissolved oxygen of 3.0 mg/L (give yourself some leeway).
A separate hopper-bottomed grit storage tank has a usable volume of 3 cubic yards. Compute the detention time in the aerated unit and the estimated length of time required to fill the storage tank with grit.
The center of gravity G of the 20-in. club is located 12 in. from the knob. knowing that at the instant, G has a velocity of 4 ft/s upwards and the club has an angular velocity of 30 rad/s counterclockwise
Show/formulate the shear and bending moment expressions for each board, and plot/draw the shear and bending moment diagrams of the boards.
Compare the total reactor volume required for 90% removal of a substance that decays according to first-order kinetics with a rate constant of 0.05 day -1 in a CM system that contains a single reactor against a system that contains three CM reacto..
A well-mixed sewage lagoon (a shallow pond) is receiving 430 m^3/d of sewage out of a sewer pipe. The lagoon has a surface area of 10 ha (hectares) and a depth of 1 m. The pollutant concentration in the raw sewage discharging into the lagoon is 18..
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