Find C.O.P from simple vapor compression refrigeration cycle R-134 a. The evaporation temperature is -20 ° C and the condenser temperature is 40 ° C. COP
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- Define C.O.P. of the simple vapor compression refrigeration cycle R-134a. The evaporation temperature is -20 ° C and the condenser temperature is 40 ° C. COP =Determine C.O.P. of the simple vapor compression refrigeration cycle R-717. The evaporation temperature is -15 ° C and the condenser temperature is 40 ° C. COP = AnswerAfter heating a 0.065kg of Iron to 525degree celsius the energy absorption registered by the 45 kJ. What is the initial temperature of the system? Answer using the G.U.E.S.S Method.
- Calculate ∆S when 1 kg of copper at 100oC is placed in 2 kg of water at 0oC in an insulated container at pressure of 1 atm. Given that : Cpcu = 0.1 , CpH2O = 1 J/g.KOne ton of liquid water at 80C is brought into awell-insulated and well-sealed 4-m * 5-m * 7-m room initiallyat 22C and 100 kPa. Assuming constant specific heatsfor both air and water at room temperature, determine (a) thefinal equilibrium temperature in the room and (b) the totalentropy change during this process, in kJ/K.An ammonia refrigeration cycle involves the conversion of 0.85 kgof liquid ammonia into vapor every minute at the boiling-pointtemperature. At what rate does the ammonia absorb energy?
- A counter-flow double-pipe heat exchanger is to heat water from 20°C to80°C at a rate of 1.2 kg/s. The heating is to be accomplishedby geothermal water available at 160°C at a mass flow rate of 2 kg/s. Theinner tube is thin-walled and has a diameter of 1.5 cm. The overall heat transfercoefficient of the heat exchanger is 640 W/m2?K. Using the effectiveness–NTUmethod, determine the length of the heat exchanger required to achieve thedesired heating.Check Your Understanding When 1.00 g of ammonia boils at atmospheric pressure and 330 . its volume changes from 1.47 to 1130 cm3. Its heat of vaporization at this pressure is 1.37106 J/kg. What is the change in the internal energy of the ammonia when it vaporizes?A sealed room has a volume of 24 m3. It's filled with air, which may be assumed to be diatomic, at a temperature of 24 and a pressure of 9.83104 Pa. A 1.00-kg block of ice at its melting point is placed in the room. Assume the walls of the room transfer no heat. What is the equilibrium temperature?
- A dilute gas is stored in the left chamber of a container whose walls are perfectly insulating (see below), and the right chamber is evacuated. Wien the partition is removed, the gas expands and fills the entire container. Calculate the done by the gas. Does the internal energy of the gas change in this process?An ideal gas goes from state (pi,vi,) to state (pf,vf,) when it is allowed to expand freely. Is it possible to represent the actual process on a pVdiagram? Explain.Two moles of helium gas axe placed in a cylindrical container with a piston. The gas is at room temperature 25 and under a pressure of 3.0105 Pa. When the pressure from the outside is decreased while keeping the temperature the same as the room temperature, the volume of the gas doubles. (a) Find the work the external agent does on the gas in the process. (b) Find the heat exchanged by the gas and indicate whether the gas takes in or gives up heat. Assume ideal gas behavior.