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It is proposed to cool 64?C air as it flows, fully developed, in a 1 m length of 8 cm I.D. smooth, thin-walled tubing. The coolant is Freon 12 flowing, fully developed, in the opposite direction, in eight smooth 1 cm I.D. tubes equally spaced around the periphery of the large tube.
The Freon enters at -15?C and is fully developed over almost the entire length. The average speeds are 30 m/s for the air and 0.5 m/s for the Freon.
Determine the exiting air temperature, assuming that soldering provides perfect thermal contact between the entire surface of the small tubes and the surface of the large tube.
Criticize the heat exchanger design and propose some design improvement.
Refrigerant 22 enters an insulated compressor operating at steady state as saturated vap or at -16 C with a mass flow rate of 1.5 kg/s. Refrigerant exits at 7 bar, 70 C. Changes in KE and PE from inlet to exit can be ignored. Determine: (a) the volum..
Create a Pressure-Enthalpy diagram for R134a. Be sure to show the saturated liquid line and the saturated vapor line together so that the entire saturation dome is displayed. Also include an isotherm, for t=70c, that extends from within the saturated..
consider a solar pond power plant operating on a closed rankine cycle. using refrigerant-134a as the working fluid
Find the dynamic load on each bearing due to out of balance couple. The distance between each eccentric is 8 cm from the centre of the shaft where the second eccentric is fixed.
a mixture having a molar analysis of 66 n2 17 co2 and 17 h2o enters a turbine at 1000 k 8 bar with a mass flow rate of
a small toy car of mass 50 gm is released from rest at a height h to slide down a ramp into a vertical loop of diameter
A box that weighs 50 lbf on earth is moved to Saturn where its new weight is 105 lbf. What is the acceleration due to gravity on Saturn? The gravitational acceleration on earth is 32.2 ft/s^2. What is the new weight (lbf) of the box if it is moved to..
How can we rotate a disc hanged with weights freely without external effects other then gravitational force cont?
Beverage in cans 150 mm long and 60 mm in diameter is initially at 27°C and is to be cooled by placement in a refrigerator compartment at 4°e. In the interest of maximizing the cooling rate,
a 1-kg disk slides on a smooth horizontal table and is attached to a string that passes through a hole in the table.a
Determine the proposed curb elevations at stations B, C, and D. B and C divide the arc into three equal sections; that is, AB = BC = CD.
A cylindrical tank with diameter d = 18 in. is subjected to internal gas pressure p = 450 psi. The tank is constructed of steel sections that are welded circumferentially (see figure). The heads of the tank are hemispherical. The allowable tensile..
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