A single stage simple vapr compression refrigeration cycle using R12 refrigerant is operating at a condenser...

A single stage simple vapr compression refrigeration cycle using R12 refrigerant is operating at a condenser temperature of 40 degrees C and an evaporator temperature of -5 degrees C. If the compressor is a reciprocating type compressor with 4 cylinder, rotating at 1800 RPM, has a cylinder diameter of 5cm, stroke length to diameter ratio of 1.4, and clearance ratio of 5%. Assume a polytropic index to be 1.13. 1- Sketch the cycle flow diagram, and identify the states on the P-H diagram. Calculate the refrigeration effect, refrigeration capacity in TR, the compressor power in HP, the cycle COP, the temperature of the refrigerant after exiting the compressor, and the cycle refrigeration efficiency.

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samet mamat answered 2 years ago

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 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 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 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.

Consider a vapour compression refrigeration cycle that uses R-134a as refrigerant. The R-134a enter

Consider a vapour compression refrigeration cycle that uses R-134a as refrigerant. The R-134a enters the compressor as a saturated vapour at 200 kPa, and exits the condenser as a saturated liquid at 900 kPa. The rate of refrigeration of the cycle is to be 6.0 tons of refrigeration (1 ton of refrigeration = 3.517 kW). The compressor isentropic efficiency is 80%. Determine: a) The temperature of evaporation and condensation of the refrigerant; b) Mass flow of the refrigerant R-134a, in ...

A vapor-compression refrigeration cycle working with R22 contains a liquid-to-suction heat exchanger. The saturated liquid refrigerant...

A vapor-compression refrigeration cycle working with R22 contains a liquid-to-suction heat exchanger. The saturated liquid refrigerant at 40 °C leaving the condenser and entering the heat exchanger is used to superheat the saturated vapor refrigerant leaving the evaporator at 7 °C by 8 °C. If the compressor is capable of pumping 5 l/s of vapor refrigerant measured at the inlet to the compressor and the compression processes are considered isentropic in both cases listed below, determine; (a) The refrigerating capacity...

purpose of the condenser in a refrigeration system? a) rejects heat from refrigerant b)absorbs heat into...

purpose of the condenser in a refrigeration system? a) rejects heat from refrigerant b)absorbs heat into the refrigerant c) rejects heat from the condensing medium d) increases pressureand temp of the refrigerant

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...

A simple saturation cycle of refrigeration system is operating on R22. This system has an evaporator...

A simple saturation cycle of refrigeration system is operating on R22. This system has an evaporator pressure of 350 kPa, condensing pressure of 1550 kPa and a discharge temperature of 80°C. Degree of sub cooling of 8 K and degree of superheat of 5 K. Draw p – h diagram and calculate the following. a. Refrigeration Effect. b. Refrigerant mass flow rate, at a plant capacity of 196 kW. c. Power input into the compressor. d. Coefficient of performance of...

A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated...

A steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. The refrigerant changes from saturated vapor to saturated liquid at 40 C in the condenser as it rejects heat. The evaporator pressure is 120 kPa. Determine: (a) the amount of heat absorbed from the refrigerated space; qL = _______________ kJ/kg (b) the net work input; and wnet = ______________ kJ/kg (c) the coefficient of performance of the system. COP = _____________

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