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3. An air-conditioning system is shown in Fig. in which air flows over tubes carrying Refrigerant 134a. Air enters with a volumetric flow rate of 50 m3/min at 32°C, I bar, and exits at 22°C, 0.95 bar. Refrigerant enters the tubes at 5 bar with a quality of 20% and exits at 5 bar, 20°C. Ignoring heat transfer at the outer surface of the air conditioner, and neglecting kinetic and potential energy effects, determine at steady state
(a) the mass flow rate of the refrigerant, in kg/min.
(b) the rate of heat transfer, in kJ/min, between the air and refrigerant.
steam flows steadily through an adiabatic turbine. the inlet conditions of the steam are 10 mpa 450 c and 80 ms and the
an ideal brayton cycle with pressure ratio of 8.95 and air enters the compressor at 285k. find the amount of work in
The Brayton refrigeration cycle is modified by the introduction of a regenerative heat exchanger. In the modified cycle, compressed air enters the regenerative heat exchanger at 350 K and is cooled to 320 K before entering the turbine. Determine, ..
air at 30 celcius and 2 mpa flows at steady state in a horizontal pipeline with a velocity of 25ms . it passes through
tarzan king of the jungle mass 66.2 kg grabs a vine of length 14.6 m hanging from a tree branch. the angle of the vine
Saturated steam at 120oC is transported through a steel pipe of diameter 250 mm. The temperature of the outer surface of the pipe can also be assumed 120oC. The pipe is centeredin concrete of square cross section (400x400 mm). The outer surfaces of t..
Air undergoes a poly tropic process in a piston-cylinder assembly from P1 = 1 atm, T1 = 70ºF to P2 = 3 atm. Employing the ideal gas model with constant specific heats at 80ºF, determine the work and heat transfer per unit mass, in Btu/lbm, if
derive the model equation mass and temperature for a cstr reactor with a first order reqaction a product. assume
Suppose an object moves on a horizontal line. If the object starts from rest at the origin and it has an acceleration of 16t-t, Determine the total distance the object has moved when time is 2 seconds. Note the distance moved is not the position. For..
an opaque horizontal plate has a thickness of l21 mm and thermal conductivity k25 wmk. water flows adjacent to the
minimum weight design of a variable shape three-bar truss.numerical solution using the matlab optimization toolbox
Research and explain the difference between phase change via evaporation and phase change via boiling. Name one device or consumer product that uses each of these phase change mechanisms. Cite your source(s)
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