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If air from the home enters the pipe at a temperature of Tm,i=29 C and volumetric flowrate of V=0.025 m^3/s, what pipe length L is needed to provide a discharge temperature of Tm,o= 21C?
In the refrigeration cycle the evaporator operates at 10oC and the condenser operates at 50oC. Determine the flow rate of propane in the refrigeration cycle (kg/s).
Compute the following quanties assuming A) Constant properties and B) Variable properties. Draw a mechanical schematic and a T-s Diagram.
A single-pane glass window is used in a heated dwelling. Outside the dwelling, the ambient temperature is 0°C while the inside temperature is 22°C.
A stainless steel tube of 1 cm outer diameter and 1mm wall thickness receives a uniform radiative heat flux of 100 W/cm^2 from a high temperature plasma over 180 degrees of its outer circumference.
A hydroponic garden uses the 10 m long perforated pipe system to deliver water at 20ºC. The pipe is 5cm in diameter and contains a circular hole every 20 cm. A pump delivers water at 75 kPa (ga
The heater considered is a natural gas furnace whose efficiency is 80 percent. What heater size (in kW input) would you recommend to your client?
A stainless steel tube of 1 cm outer diameter and 1mm wall thickness receives a uniform radiative heat flux of 100 W/cm^2 from a high temperature plasma over 180 degrees of its outer circumference:
A single plane glass window is used in a heated dwelling. Outside the dwelling, the ambient temperature is 0°C while the inside temperature is 22°C. Determine the heat loss through the glass
For the water, locate the initial and final states on a sketch of the T-y diagram and determine the heat transfer, in kJ.
Determine the final pressure inside the cylinder, the work done by the propane, and the heat transfer during the process.
Steam at 7 bars and temperature T enters an adiabatic mixing tank. compressed water at 40 C and 7 bars enters at another opening, and the mixture leaves as a saturated vapor at 7 bars.
Steam at 200 C and 7 bars enters a mixing tank at a rate of 3 kg/min through a pipe with a cross-section of 1.20 cm^2. Liquid water at 30 C and 7 bars enters the tank through another pipe at a rate
Ten kilograms of ice at 260 K is dumped into 20 kg of liquid water initially at 300 K in an insulated container. Calculate the mass of ice melted.
A pneumatic lift system is being demonstrated at a sales show. The total load is 70 kg, and the lift piston is 15.2 cm in diameter and has a 20.2 cm stroke.
An ideal gas with molecular weight of 6.5 kg/kgmol is compressed in a reversible manner from 690 kPa and 277 K to a final specific volume of 0.47m3/kg accordning to p=561 + 200v+ 100v^2, where p is
What is the temperature in Kelvin assuming an adiabatic expansion of an ideal gas. Comment as to the extent to which the adiabatic expansion modle is valid for this situation.
A cylindrical rod with a diameter of 25mm is subjected to a torque of 500N?m and axial tensile force of 40KN. Draw a stress element on the lateral surface of the bar and label the stresses it experien
A helicopter moves horizontally in the x direction at a speed of 120 mi/h. Knowing that the main blades rotate clockwise with an angular velocity of 180 rpm, determine the instantaneous axis of rota
In the next experiment, starting from the same initial conditions, the operator places a mass M = [(P2-P1)A]/g, where P2 is the final pressure of 10 bar, P1 is the initial pressure of 1 bar, is the
Estimate the amount of free fall time that would be possible that would still allow full deployment of the parachute and a safe landing.
How to determine the equilibrium concentrations of H2, OH, and H2O when water is heated to 1000, 3000, 5000K. What if the pressure goes from 1atm to 500atm. Which equations are appropriate for this?
Calculate the required growth rate moving this shaft though the furnace in order to maintain flane front and avoid dendritic growth.
Determine the temperature rise of the contents after 0.8 h if the mass of the water is 6 kg and the mass and specific heat of the paddle wheel are 0.4 kg and 0.96 kJ/kg-K, respectively.
If the liquid water is initially at a temperature of 30°C, how much heat must be added to bring the water to its boiling point (i.e., make it a saturated liquid)?