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Calculate the overall efficiency, the heat rate [MW], and the total fuel rate [kg/s] of a combined-cycle power plant (1) if no supplemental firing is used.
The cylinder from a supply line until all the liquid in the cylinder has vaporized. Determine a) the final temperature in the cylinder and b) the mass of the stream that has entered.
Determine: (a) the minimum diameter required for tie rod (1). (b) the minimum diameter required for the double shear pins at B and D. (c) the minimum diameter required for the double shear pin at C.
Knowing that P starts from rest, and it's speed increases at a constant rate of 10mm/s^2, determine (a) the magnitude of the acceleration when t=4 s (b) the time for the magnitude of the acceleratio
Coming out of a factory chimney are the following gases, CO2, SO2, O2, N2, H2O with volume percentage to be 13.5%, 0.3%, 5.2%, 76%, and 5% respectively. Calculate density of the gas mixture.
Determine (a) the tractive force exerted by each locomotive at 21 mi/hr, (b) the power required from each locomotive at 21 mi/hr, (c) the power required from each locomotive as the train speed appro
Determine (a) the principal stresses on an element from the cylindrical portion of the tank surface, and (b) the principal stresses on an element from a portion of the spherical end caps.
For material A, K=60,000 psi, n=0.5, A0=0.6 in2. For material B, K=30,000, n=0.5, A0=0.3 in2. Calculate the maximum tensile force that this cable can withstand prior to necking.
The water is cooled to a temperature of 110 o C. At this temperature the masses of the saturated vapor and liquid are each 0.75 kg. Determine the heat transfer for the process, in kJ.
The heat to the surrounding at 25 C until the steam is completely condense. Determine the net entropy change of the universe for this process.
Determine the a) change in entropy of the system, b)Change in entropy the surrounding and c) change in entropy the universe during this process.
A refrigeration cycle operates continuously and removes energy from the refrigerated space at a rate of 12,000 Btu/h. The coefficient of performance is 2.6. Determine the net power required (hp).
Determine the slab thickness 2L required to transfer a total amount of energy such that Q/Qo = 0.90 over a t= 8-h period. The initial concrete temperature is Ti=40 degrees celcius.
Finally compressed at the constant pressure to the initial state. Determine the boundary work for each process and the total work of the cycle.
It is now expanded to a final pressure of 50Pa. During this process the temperature inside the cylinder remains constant. Calculate the work.
Determine 1) the pressure at the initial state; 2) temperature at the final state; and 3) the internal energy change.
Kinetic and potential energy effects can be neglected. Determine the work and heat transfer for the process, each in kJ.
The heat load on the refrigerator (heat leaking through walls which must be removed) is 350J/s. What is the minimum temperature that can be maintained in the refrigerator?
A structural compenent is formed with aluminum alloy 6061-T6 with Young's modulus E=68.9 GPa and shear modulus G= 26 GPa. calculate the max tensile stress and max shear stress.
Each turbine stage operates with an isentropic efficiency of 88%. The pump operates with an efficiency of 80%. Determine for the cycle:the rate of heat transfer to cooling water passing through the c
Steam at 10 MPa, 600 degrees C, enters the first-stage turbine of an ideal Rankine cycle with reheat. If the quality at the exit of the second-stage turbine is 90%, determine the cycle thermal efficie
The wood absorbs 90% of the late afternoon solar radiation of 100 Btu/hr-ft^2. Ignoring radiation from the wood, determine the rate of heat transfer from the wood to the air.
Consider a plate with uniform heat generation q. For k=200 W/mK q=40 MW/m^3. T1=160 C (at x=0), T2=100 C (at x=2L) and a plate thickness of 2cm, determine q/A at the plate center.
How do you determine the thickness of a tapering barrel of a gun at the largest end using pressure, temperature on the inside surface.
Find the initial volume and final volume for this process (m3). (c) Find the work for this process (kJ). (d) Find the heat transfer required for this process (kJ).