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In order to increase heat transfer from this pipe by 200%, it is recommended to use integrally cast annular aluminum fins of height 10 mm and thickness 1 mm. Calculate the spacing of the fins.
Steam power plant operates on the reheat-regenerative Rankine Cycle with a closed feedwater heater. Find temperature of steam at the inlet of closed feedwater heater.
Determine the work produced by the turbine, the work consumed by the pumps, the heat rejected in the condenser for this cycle per unit of flow through the boiler.
The values of m and A are 4 and 5*10^-12, respectively (for change in stress in MPa and a in m), estimate the fatigue life of this plate.
During the power plant operation, water flows into the turbine at the rate of 75 m^3/sec and the generator operates at an average efficiency of 91%. Neglect any losses in the piping system. Evaluat
Estimate the maximum tensile stress to yield a fatigue life of 2.5*10^7 cycles. Assume the parameter Y has a value of 1.4, which is independent of crack length.
What is the maximum allowable hole diameter. Assume Y = 1.4. Note, given more than one choice of material data, choose conservatively.
Jack and Jill are involved in a friendly game which involves maximizing the distance (i.e. range) of their arrow shots. At what angle should Jack launch his arrow to maximize his range of shot?
If the angle is decreasing at a rare of .03 rad/min when the angle is 75 degrees, determine the speed v of the plane and the values of (r double dot) and (theta double dot) at this instant.
What is the shaft centerline temperature after exposure to the convective flow for 45 minutes? The convection heat transfer coefficient, h, is 80 W/m^2-K.
Saturated liquid exits the open feedwater heater at 1 MPa. Each turbine stage has an isentropic efficiency of 82%. Each pump has an isentropic efficiency of 100%. Determine the thermal efficiency.
Assume that there is one velocity head loss at the inlet and 0.5 velocity head loss at the outlet of the heat exchanger. The elevation difference is 10.5 m. Calculate the total pressure drop in the
The air mass flow rate is 0.5 kg/s. Air properties may be evaluated at 20o and 1 atm. Calculate the frictional pressure drop and the pumping power.
The spacing between the plates is 2 cm, and the mean velocity of the water is 3.5 m/s. Calculate the pressure drop per unit length in the hydrodynamically fully developed region.
What series of equal (uniform) payments is necessary to repay the following present amounts? $5,000 in 5 years at 15% compounded annually with annual payments?
Determine overall BTu's per hour to heat the steel from inside to out to bring the outer surface from the -20 to 32F and determine the required forced air temperature of heat source to achieve this.
Compute the bearing stress exerted by the legs on the floor if the total weight of the machine is 28,500 lb and the load is equally divided among the four legs.
The mass of the air in the cylinder is 0.5 lbm. Assuming that the air properties can be modeled using the ideal gas law, determine the work and heat transfer (both in Btu).
Find the volume flow rate at the compressor inlet [L/s], the power input [kW], the COP, the second-law efficiency and the total exergy destruction rate [kW].
Calculate the amount of oil produced at the stock tank condition, if 15% of the reservoir oil is produced and there is no significant change in reservoir pressure. Your answer should be in [stock ta
Calculate the original oil in place (OOIP) of an oil reservoir if the drainage area = 1600 acres, thickness=30 ft, porosity=0.3 and Sw=0.2 at the initial reservoir pressure = 4000 psi.
Determine the specific volume of superheated water vapor at 10 MPa and 400 °C using (a) the ideal gas equation, (b) the generalized compressibility chart.
The valve is now opened and the entire system is allowed to reach thermal equilibrium with the surroundings, which are at 20 °C. Determine the volume of the second tank and the final equilibrium
Determine the reading on the pressure gage in psig when all the liquid has just turned to vapor (all saturated vapor). Show this process on a sketch of a T-v diagram.
Calculate the power and mix time for a pitch blade turbine agitator with diameter DA=0.33 m running at N=16 rpm in a tank system without baffles but otherwise conforming to the standard tank configu