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Determine: (i) the change in entropy, (ii) the work of compression per unit mass and (iii) the heat transferred per unit mass.
The inside temperature now decreases to -13 degrees C with the ambient temperature remaining constant at 27 degrees C. Determine the percent increase in work input for the same quantity of heat, Q
Calculate the air temperature and density at the outlet of the charge cooler. Estimate the % increase in air density due to charge cooler for this operating condition.
Calculate the compressor outlet temperature, the compressor outlet density and the power required to drive the compressor per unit mass of air flow through it.
If your answer is NO, then calculate the rate at which the air conditioner must remove energy from the kitchen to maintain a cool, constant temperature.
A dam spillway is tested with a 1/30th scale model, matching the Froude number. What will be the velocity and flow rate for the model?
To what pressure (in atm) should the air in the wind tunnel be pressurized to scale both the Reynolds number and Mach number accurately?
The convective heat-transfer coefficients are: ho = 4 Btu/h ft2 oF and hi = 2 Btu/h ft2 oF. What is the heat-transfer rate (W) from the room into the freezer?
The temperature and pressure of the stream entering the flash drum are 105°C and 325 kPa. Determine the K-values from a DePriester chart, analytically solve the material balance.
Determine the height (m) above the shower at which the tank should be placed. Sketch the system and indicate points you use along the streamline.
Calculate the cost per piece of a milling operation that is used to machine a pocket of 2"x3"x0.5" (LxWxD). The material being machined is high silicon aluminum.
Locale the critical points of f(x,y) = x3 +y3 + 3xy + 5 and classify them using the second derivative test. Find three positive numbers whose sum is 18 and the sum of whose squares is as small as po
The steam expands reversibly and isothermally to a final pressure of P2 = 800 kPa. Determine the heat transferred and the work done during this process.
An electric resistance heater placed in the tank is now turned on and kept on until all the liquid in the tank is vaporized. Determine the entropy change of the steam during this
Heat in the amount of 100 kJ is transferred directly from a hot reservoir at 1200 K to a cold reservoir at 600 K. Calculate the entropy change of the two reservoirs and determine
Assuming static conditions, calculate the pressure in the gas and the oil phases if the pressure in the water phase is 110 kN/m^2.
Saturated liquid water is compressed from 100 kPa (State 1) to 2.5 MPa (State 2) in an adiabatic pump having 85% isentropic efficiency. Determine the entropy generation (kJ/kg-K) for the pump.
Calculate (a) the coal firing rate in lb/hr, (b) the fuel gas flow rate in scfm, and (c) the SO2 removal efficiency needed to meet a standard of 1.4 lb/MWh gross electrical energy output.
The facility is required to collect all the vented air and route it to a biofilter to control total emissions to less than 30 kg of ethanol per day. Calculate the required control efficiency.
The power output of the two-stage turbine is 80 MW and isentropic efficiency of each turbine stage is 84%. Calculate the rate of entropy generation (kW/K) for the two-stage turbine.
What is the fracture toughness K1c of the material of the sample? If the material has a modulus E of 200 GPa, what is its toughness?
A homogeneous liquid solidifies directly to a solid containing A and the high temperature polymorph of B. Construct the phase diagram.
Hemispherical end caps are welded to a cylindrical main body to form a propane storage tank. Determine the minimum wall thickness Tc of the cylindrical.
A hot air balloon (approx as a sphere of diameter 50ft) is to lift a basket load of 600lbf. To what temperature must the air be heated in order to achieve lift off?
Determine the final temperature in °C, the entropy change for the copper vessel and each of the liquid water masses, and the amount of entropy produced.