Question

In: Mechanical Engineering

value of y is _____4_______. Consider an ideal vapor-compression refrigeration cycle using Freon 410A (see ....

value of y is _____4_______.

Consider an ideal vapor-compression refrigeration cycle using Freon 410A (see . https://www.freon.com/en-/media/files/freon/freon-410a-si-thermodynamic-properties.pdf) The pressure in the evaporator is 10y kPa (That is, if y = 3 the evaporator pressure is 30 kPa). and the temperature at the exit of the condenser is 40oC. The mass flow in the system is (0.05 + y/200) kg/s.   (That is, if y =3, then the mass flow is 0.0.065 kg/s).

  1. Find the enthalpy at the entrance to the compressor.                    h = __________ kJ/kg (+ 3 kJ/kg)

  1. Find the enthalpy at the exit of the compressor.                              h = __________ kJ/kg (+ 5kJ/kg)

  1. Find the enthalpy at the exit of the condenser.                                h = __________ kJ/kg (+ 3kJ/kg)

  1. Find the rate of heat transfer in the evaporator:                              = __________ W (+ 300W)

Solutions

Expert Solution

samet mamat answered 2 months ago
Next > < Previous

Related Solutions

An ideal vapor compression refrigeration cycle using r134a as the refrigerant is being used to cool...
An ideal vapor compression refrigeration cycle using r134a as the refrigerant is being used to cool a house. It provides 3 refrigeration tons ≈ 10.5kW of cooling (heat removal from the house air). The refrigerant in the evaporator operates at 400kPa while in the condenser it is at 1000kPa. Treat the surroundings as a thermal reservoir at 33◦C and the air in the house as a thermal reservoir at 19◦C. All reservoirs are at 100kPa. 1. What is the COPr...
An ideal vapor compression refrigeration cycle with R134a as the working fluid operates between the pressure...
An ideal vapor compression refrigeration cycle with R134a as the working fluid operates between the pressure limits of 200 kPa and 1200 kPa. Determine a) the mass fraction of the refrigerant that is in the liquid phase at the inlet of the evaporator, and b) the amount of heat transfer (in kJ/kg) to the refrigerant in the evaporator (??).
An ideal vapor-compression refrigeration cycle is modified to include a counterflow heat exchanger, as shown in...
An ideal vapor-compression refrigeration cycle is modified to include a counterflow heat exchanger, as shown in the figure below. Ammonia leaves the evaporator as saturated vapor at 1 bar and is heated at constant pressure to 5°C before entering the compressor. Following isentropic compression to 18 bar, the refrigerant passes through the condenser, exiting at 40°C, 18 bar. The liquid then passes through the heat exchanger, entering the expansion valve at 18 bar. If the mass flow rate of refrigerant...
There is a vapor compression type refrigeration cycle using the refrigerant HFC 134 a. In the...
There is a vapor compression type refrigeration cycle using the refrigerant HFC 134 a. In the condenser, it is isostatically cooled, the condensation temperature is 50 ° C., and the condenser outlet is the compressed liquid at 45 ° C. In the evaporator, it is isothermally heated, the evaporation temperature is 10 ° C. and the outlet of the evaporator is heated steam at 15 ° C. When the expansion valve performs isenthalpic expansion, and the adiabatic efficiency of the...
An air conditioner using refrigerant-134a as the working fluid and operating on the ideal vapor-compression refrigeration...
An air conditioner using refrigerant-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle is to maintain a space at 30°C while operating its condenser at 1000 kPa. Determine the COP of the system when a temperature difference of 2°C is allowed for the transfer of heat in the evaporator. (Take the required values from saturated refrigerant-134a tables.) The COP of the system is ?
A normal refrigeration cycle uses one coolant, so why does vapor compression cycle of an ice...
A normal refrigeration cycle uses one coolant, so why does vapor compression cycle of an ice rink you a primary coolant and a secondary coolant?
A vapor-compression refrigeration cycle working with R22 contains a liquid-to-suction heat exchanger.
A vapor-compression refrigeration cycle working with R22 contains a liquid-to-suction heat exchanger. The saturated liquid refrigerant at 40 ℃ leaving the condenser and enteringthe heat exchanger is used to superheat the saturated vapor refrigerant leaving the evaporator at 7 ℃ by 8 ℃. If the compressor is capable of pumping 5 1/s of vapor refrigerant measuredat the inlet to the compressor and the compression processes are considered isentropic in both cases listed below, determine; (a) The refrigerating capacity in kW,...
A vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated...
A vapor-compression refrigeration cycle operates at steady state with Refrigerant 134a as the working fluid. Saturated vapor enters the compressor at 2 bar, and saturated liquid exits the condenser at 10 bar. The isentropic compressor efficiency is 80%. The mass flow rate of refrigerant is 7 kg/min. Determine: (a) the compressor power, in kW. (b) the refrigeration capacity, in tons. (c) the coefficient of performance.
An ice-making machine operates on the ideal-vapor compression cycle using refrigerant-134a. The refrigerant enters the compressor...
An ice-making machine operates on the ideal-vapor compression cycle using refrigerant-134a. The refrigerant enters the compressor as saturated vapor at 40 psia and leaves the condenser as saturated liquid at 80 psia. Water enters the ice machine at 55°F and leaves as ice at 25°F. For an ice production rate of 21 lbm/h, determine the power input to the ice machine (169 Btu of heat needs to be removed from each lbm of water at 55°F to turn it into...
4: Consider a vapor refrigeration cycle. a: Draw the T-s diagram of the reversed Carnot Cycle...
4: Consider a vapor refrigeration cycle. a: Draw the T-s diagram of the reversed Carnot Cycle and describe what kind of problem each process of the cycle has explicitly. (We use the mixture of liquid and vapor as its working fluid.) b: Draw a T-s diagram in the ideal refrigeration cycle and label each process explicitly. Write down the COP in terms of enthalpy. c: There are the multipurpose refrigeration system and the multistage refrigeration system to improve the ideal...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT