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A geothermal power plant on the Raft River uses isobutane as the working fluid in a Rankine cycle. Find the specific turbine work and the specific pump work.
Find the minimum work required and the heat transfer using generalized charts. What devices are needed to accomplish this change of state?
A 10-ft3 tank contains propane at 90 F, 90% quality. The tank is heated to 600 F. Calculate the heat transfer during the process.
Make a list of several materials such as liquids, gels, and solids and show examples of their use.
Use the Gibbs relation du = T ds - P dv and one of Maxwell's relations. What is the value of that partial derivative if you have an ideal gas?
A container has a double wall where the wall cavity is filled with carbon dioxide at room temperature. Estimate the pressure in the wall cavity at 100 K.
A 4-m3 storage tank contains ethane gas at 10 MPa, 100?C. Using the Lee-Kesler EOS, find the mass of the ethane.
Compute the exit temperature and the specific entropy generation using the Redlich-Kwong EOS and ideal gas heat capacity.
Find changes in an isothermal process for u, h, and s for a gas with an EOS as P(v - b) = RT. What does this predict for the reduced Boyle temperature?
The air-fuel ratio in the cylinder is to be 20:1 on a mass basis. How many moles of oxygen per mole of methane are there in the cylinder?
What is the ratio of the two flow rates? To what temperature must the first stream be cooled?
Find the relative humidity at state 2, the heat transfer per kilogram of dry air in the dryer the air flow rate and the amount of water condensed on the window.
Take the balloon and tank as a control volume, and calculate the final temperature and the heat transfer for the process.
find 1Q2and the final relative humidity. If it is compressed from the initial state to 200 kPa in an isothermal process, find the mass of water condensing.
The valve is opened and remains open until the resulting gas mixture comes to a uniform state. Compute the final pressure and temperature.
What is the overall molecular weight, the gas constant, and the ratio of specific heats for such a mixture?
Sketch a setup to accomplish this, and find any amount of liquid (at 68 F) that is needed or discarded, and any heat transfer.
The system is cooled until the water just begins to condense. Determine the final temperature in the tank and the heat transfer for the process.
If I have air at 14.7 psia and (a) 15 F, (b) 115 F, and (c) 230 F, what is the maximum absolute humidity I can have?
All the water evaporates, and the air leaves at 40oC. What is the exit relative humidity and the heat transfer?
Ambient moist air enters a steady-flow air conditioning unit at 102 kPa, 30oC, with 60% relative humidity. Determine the rate of heat transfer for this process.
What is the dew-point temperature? If the mixture is cooled 10oC below the dew-point temperature, how long will it take to collect 10 kg of liquid water?
Find the exit moist air humidity ratio and the flow rate of liquid water. Also find the dry air inlet temperature T1.
If I have air at 100 kPa and (a) -10oC, (b) 45oC, and (c) 110oC, what is the maximum absolute humidity I can have?