Refrigerant-134a is used in a heat pump operating according to an ideal cycle with vapor compression. The flow rate of the refrigerant is 0.32kg/s. Condenser and evaporator pressures are 900kPa and 200kPa, respectively. Calculate a) the heat given to the hot environment from the cycle, b) the volumetric flow rate of the refrigerant at the compressor inlet, c) the heating efficiency coefficient.

Refrigerant-134a is used in a heat pump operating according to an ideal cycle with vapor compression. The flow rate of the refrigerant is 0.32kg/s. Condenser and evaporator pressures are 900kPa and 200kPa, respectively. Calculate a) the heat given to the hot environment from the cycle, b) the volumetric flow rate of the refrigerant at the compressor inlet, c) the heating efficiency coefficient.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter28: Special Refrigeration Applications

Section: Chapter Questions

Problem 15RQ: Why is two-stage compression popular for extra-low-temperature refrigeration systems?

See similar textbooks

Similar questions

Condensers in these refrigerators are all_______cooled.
Welded ______sealed compressors are normally used in household refrigerators.
1) A vapor compression cycle using Ammonia as refrigerant operates at an evaporating temperature of -5 deg. Centigrade and a condensing temperature of 35 deg. Centigrade. The vapor Ammonia was superheated before entering the compressor suction to 10 °C with useful cooling. Determine a) the Coefficient of Performance of the cycle. For 15 TOR determine b) the power required by the compressor c) the heat rejected in the condenser d) volume flow rate at the suction.
Refrigerant 134a is used in a cooling system operating according to the ideal cooling cycle with vapor compression for cooling the cold storage in the milk processing plant. The flow rate of the refrigerant is 0.10 kg/s. The condenser and evaporator pressures are 1000 kPa and 600 kPa, respectively. a) Calculate the cooling capacity as (kW). b) Calculate the volumetric flow rate of the refrigerant at the compressor inlet. c) Calculate the efficiency coefficient of the cooling system.
For R-410A refrigerant, which operates at a flow rate of 0.102 kg/s. It is known that saturated vapor enters the compressor at -40ºC and that saturated liquid leaves the condenser at 0ºC. The refrigerant operates in the saturation region. Determine: a) The compression power. b)The cooling power. c) The coefficient of performance.
1st Step: Evaluate the performance of the Refrigerator 1.Refrigerator 1 operates as a reverse Carnot cycle using R-717 as the refrigerant at aflow of 1.8 kg/s. The condensing and evaporating temperatures are 25 °C and -5 °C, respectively.To evaluate the performance of Chiller 1, you must determine the following performance parameters:project:a) Rate of heat elimination in the condenser (Q );b) The power of the compressor;c) The COP of the cycle.For the energy balance, make the following considerations:- Permanent regime;- Variation of kinetic energy and potentials are negligible;- Compressor and turbine operate adiabatically;- Evaporation and condensation steps do not involve work. Please, make it typeable, written in virtual text, do not do it by hand and do not take a photo, it interferes with the understanding of the lyrics.
1) A vapor compression cycle using Ammonia as refrigerant operates at an evaporating temperature of -5 deg. Centigrade and a condensing temperature of 35 deg. Centigrade. The liquid Ammonia was subcooled before entering the thermostatic expansion valve (TEV) to 30°C and the suction vapor was superheated to 20°C without useful cooling. Determine a) the Coefficient of Performance of the cycle. For 15 TOR determine b) the power required by the compressor c) the heat rejected in the condenser d) volume flow rate at the suction.
An ideal vapor-compression refrigeration cycle employs refrigerant 134a as the working fluid and operates at a steady state. At the compressor inlet, saturated vapor enters a -20 degrees celcius, and the saturated liquid leaves the condenser at 42 degrees celcius. The mass flow rate of the refrigerant is 0.5 kg/s. Determine: a) The rate of heat rejection from the condenser in kW b) The compressor power in kW c) The coefficient of performance
A heat pump that operates on the ideal vapor-compression cycle with refrigerant-134a is used to heat a house. The mass flow rate of the refrigerant is 0.2 kg/s. The condenser and evaporator pressures are 1 MPa and 400 kPa, respectively. a) Determine the rate of heat supply to the house. b) Determine the volume flow rate of the refrigerant at the compressor inlet.
i) A Freon 12 vapour compression system operating at a condenser temperature of 45C° and an evaporator temperature of OC° develops 20 tons of refrigeration. Using the p-h diagram for Freon 12, determine; (15) a) The mass flow rate of the refrigerant circulated. b) The heat rejected in the condenser, and c) The Carnot COP and the actual COP of the cycle.
Refrigerant 134a is used as the working fluid in a refrigerator, and it operates in an ideal vapor compression refrigeration cycle, if the refrigerant enters the evaporator at -4 ° C and enters the condenser at 1200 kPa. If the mass flow of the refrigerant is 180 kg / h, determine a) the Ts and Ph diagrams of the cycle with all the information b) the rate of heat removal from the refrigerated space and the power input to the compressor, and c) the COP Of fridge
Q2/ A vapor-compression refrigeration system operates on the cycle. The refrigerant is tetrafluoroethane. For Evaporation T = 0°C; condensation T = 26°C; n(compressor) = 0.79; refrigeration rate = 600 kJ-s—1., determine the circulation rate of the refrigerant, the heat-transfer rate in the condenser, the power requirement, the coefficient of performance of the cycle