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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 at 25 psia and 250degf is condensed at its saturation temperature. what is the temperature of the condensate? how
determine the actual and minimum theoretical operating costs, each in $/day.
suppose a cube of aluminum which is 1.00 cm on a side accumulates anet charge of 2.50 pc. awhat percentage of the
A vapor-compression heat pump system uses R-134a as the working fluid. The refrigerant enters the compressor at 0.24 Mpa, 0 degrees Celsius, with a volumetric flow rate of 0.6m^3/min. The compression process is adiabatic to 0.9 MPa, 60 degrees Cel..
Evaluate the direction and rate of change of water surface level in the flask at this instant.
an inventor claims to have developed a device that takes an air stream at 20degc 274 kpa and produces two separate
an electric generator provides 500 kw and is powered by a diesel engine with a compression ratio of 19 and a cutoff
Compute the fugacities of ethane and n-butane in an equimolar mixture at 373.15K at 1, 10, and 15 bar total pressure using the viral equation of state.
a rigid 110-l steam cooker is arranged with a pressure relief valve set to release vapor and maintain the pressure once
Atomic radius and atomic weight of niobium are 0.143nm and 92.91 g/mol respectively. Calculate Nb density assuming (1) FCC, and (b) BCC crystal structures. Compare the values with t the available Nb density from the textbook (Materials Science and En..
distance per tank of gas a car with a 20-gallon gas tank averages 21.5 miles per gallon when driven in own and 26.8
a vat holds 2.25103 kg of a 22.0 solution of ethylene glycol and water. how much must be drained from the tank and
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