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Heat input of 6.63 kJ occurs in every cycle. Consider variable specific heats for air. Calculate the maximum pressure (kP) and maximum temperature in the cycle.
Plot thrust vs. time. What is the velocity of the rocket at 15, 20 and 30 seconds? Find the maximum altitude attained by the rocket. Ignore air friction.
Determine the rate of entropy production (kW/K) within the compressor if the air is modeled as an ideal gas with variable specific heats.
The gear is to transmit 90 HP at 300 RPM. What does the inside diameter of the gear need to be if the entire torque is to be carried by the press fit?
Find power required by the compressor, isothermal efficency, heat removed from the refigerated space, and the coefficient of performance.
The temperature of the steam entering the turbine is 700 F. Calculate the thermal efficiency of the cycle assuming isentropic expansion in the turbine.
Describe the relationship between microstructure, scale and material properties. Provide an example for how microstructure influences properties for metals, ceramics and glass, and polymers.
Calculate the change in entropy per kilogram as air is heated from 300 to 600K while pressure drops from 400 to 300kPa assume: a) constant specific heat; b) variable specific heat.
Two failures were recorded at the end of the 200 operating hours. Determine a 90 percent, two-sided confidence interval for R(200). Determine a 90 percent lower-bound confidence interval for R(200).
At the entrance to the adiabatic compressor, the r-134a is at 160 kPa and -10oC and it exists at 700 kPa and 50oC. The system releases heat to the environment at a rate of 12.5 kW. Find the power requ
Determine the total hemispherical emmisivity of a surface that has a spherical hemispherical emmisivity of 0.3 at wavelengths less than 1.5 um.
Determine the maximum allowable steam pressure at the turbine inlet and calculate the rankine cycle efficiency for these steam conditions. estimate also the mean temperature of heat addition.
During the compression process the relation between pressure and volume is PV1.3=constant. Calculate the work and heat transfer per kilogram, and show this on P-V and T-S diagrams.
A spring is initially compressed from a free length of 8in to a length of 6in, making a net initial compression of 2in. What additional work is done in comressing it 3in more (5 inches total) to a 3
Find the heat transfer and work per unit mass of air in KJ/kg for each process of the two cycles, and compare the thermal efficiency of each. Assume constant specific heats at room temperature, and
Design the heat pump system including the number and depth of wells and layout of the piping system. Compare the cost of the proposed geothermal system.
Determine the work and heat transfer per unit of mass passing through the device in kJ/kg, if the air undergoes a polytropic process with n=1.3.
Air containing 1.6 mol% SO2 is to be scrubbed with pure water in a packed column with a 1.5 m2 cross-sectional area. Calculate NOG and HOG.
Steam enters the turbine in a vapor power plant at 1600 psia and 1000F (State 1) and expands to a pressure of 1 psia. What is the mass flow rate (lbm/hr) of steam through the power plant?
The cyclic device rejects thermal energy to 40 C surroundings. Assume that all proceses are reversible and determine the required power input to the cyclic device.
Design a basic Rankine cycle that uses water, refrigerant-134a or ammonia as the working fluid and that produces the maximum amount of work from this energy source.
What future implications do you see developing? How does the computer application software that you studied in this course impact the Engineering Technology field.
Determine the emission rate of gasoline vapors associated with refueling, in units of grams emitted per gallon of gasoline compound.
A horizontal disc accelerates from rest at 5 rad/sec2. The coefficient of static friction between it and the 2.5-kg block is 0.20. At what speed of the disc will the block begin to slide?