(B) Draw T-S, P-H diagrams of vapour compression refrigeration system.
(B) Draw T-S, P-H diagrams of vapour compression
refrigeration system.
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(B) Draw T-S, P-H diagrams of vapour compression
refrigeration system.
Please also draw the T-S diagrams and PH diagrams to facilitate understanding. Thank you. 5. The refrigeration system s...
Please also draw the T-S diagrams and PH diagrams to facilitate
understanding. Thank you.
5. The refrigeration system shown below is another variation of the basic vapor compression refrigeration system which attempts to reduce the compression work. In this system, a heat exchanger is used to superheat the vapor entering the compressor while sub-cooling the liquid exiting from the condenser Consider a system of this type that uses refrigerant-134a as its refrigerant and operates the evaporator at -10°C, and the...
Thermodynamics A two-stage vapour-compression refrigeration plant shown in Figure Q2 diagrammatically below is discharged with Refrigerant...
Thermodynamics
A two-stage vapour-compression refrigeration plant shown in Figure Q2 diagrammatically below is discharged with Refrigerant 12. Both compressors are single-acting, single-stage reciprocating machines with four cylinders and as isentropic efficiency of 80%. They each have a stroke/bore ratio of 1.2 and run at 600 rev/min with a volumetric efficiency of 90%. The condenser, flash chamber and evaporator pressures are 10 bar, 3 bar and 1 bar respectively. Saturation states exist at points 5 and 3 and the vapour at...
Problem Statement A vapour compression refrigeration system operates between 12 bar and 1.4 bar. The com-...
Problem Statement A vapour compression refrigeration system operates between 12 bar and 1.4 bar. The com- pressor inlet is superheated by 4K. The mass flow rate of the refrigerant (R131a) is 0.5 kg/s and the refrigeration effect is 65 kW. If the condenser inlet is at 70°C, determine the coeffi- cient of performance of the system and the isentropic efficiency of the compressor. Answer Table Value Description Coefficient of performance Compressor isentropic efficiency (%)
A standard vapour compression refrigeration cycle operates between pressures of 220 kPa and 1000 ...
A standard vapour compression refrigeration cycle operates
between pressures of 220 kPa and 1000 kPa, with a compressor having
an isentropic efficiency of 92.0%. It has a mass flow rate of
0.71kg/s. Evaluate the enthalpy for each of the states in the
cycle: Property State 1 2a 3 4 h kJ/kg Calculate the actual power
consumed by the compressor: W˙compressor= kW Calculate the CoP of
the cycle: CoP=
A standard vapour compression refrigeration cycle operates between pressures of 220 kPa...
Thermodynamics A two-stage vapour-compression refrigeration plant shown in Figure Q2 diagrammatically below is discharged with Refrigerant 12. Both compressors are single-acting, single-stage recipro...
Thermodynamics
A two-stage vapour-compression refrigeration plant shown in Figure Q2 diagrammatically below is discharged with Refrigerant 12. Both compressors are single-acting, single-stage reciprocating machines with four cylinders and as isentropic efficiency of 80%. They each have a stroke/bore ratio of 1.2 and run at 600 rev/min with a volumetric efficiency of 90%. The condenser, flash chamber and evaporator pressures are 10 bar, 3 bar and 1 bar respectively. Saturation states exist at points 5 and 3 and the vapour at...
2- In vapour compression refrigeration system, compressor is used because a. It increases cooling effect of...
2- In vapour compression refrigeration system, compressor is used because a. It increases cooling effect of cycle b. It makes possible, to remove heat from refrigerant at atmospheric pressure c. It increases the coefficient of performance of the system d. It removes thermal properties of refrigerant 3- The area under pressure volume curve of any thermodynamic process represents a. heat rejected only b. heat absorbed only c. heat absorbed and rejected d. work done 4. What is the correct formula...
solve problem below by replacing R134a with ammonia (and explain each step please) A SSS vapour...
solve problem below by replacing R134a with ammonia (and explain each step please) A SSS vapour compression refrigeration system based on refrigerant R 134a, operates between an evaporator temperature of -25 °C and a condenser temperature of 50°C . Assuming isentropic compression draw t-s and p-h diagram a) COP of the system b) Work input to compressor c) Area of superheat horn d) Throttling loss ▪ assume the isobar at condenser to coincide with saturated liquid line.
A 100-ton refrigeration system operates on the simple vapor compression refrigeration system with R-22 as the...
A 100-ton refrigeration system operates on the simple vapor compression refrigeration system with R-22 as the working fluid. The evaporator pressure is 2 bar and the condenser pressure is 30 bar. The refrigerant leaves the compressor at 160oC. 1 ton of refrigeration = 3.517 kW Determine the cooling load, in kW. Plot all five points (1, 2s, 2a, 3, 4) on the P-h diagram. Determine the power consumed by the refrigeration system, in kW. Determine the COP of the system. Isentropic efficiency...
4. The following test data were obtained from a R134A vapour-compression refrigeration system Condenser pressure Evaporator...
4. The following test data were obtained from a R134A vapour-compression refrigeration system Condenser pressure Evaporator pressure Temperature at compressor inlet Temperature at compressor outlet Temperature at condenser inlet Temperature at condenser outlet Temperature at expansion valve inlet 30 Temperature at evaporator outlet 0.9 MPa 0.6 MPa 30 C 120 C 110 C 25 C 20 °C During compression, 3.5 kJ/kg was transferred from the fluid. Determine the coefficient of performance and perform an energy balance on the system
1. MULTI-STAGE COMPRESSION AND EXPANSION The following data refer to a two stage vapour compression system:...
1. MULTI-STAGE COMPRESSION AND EXPANSION The following data refer to a two stage vapour compression system: Condensing temperature Flash intercooler temperature Evaporating temperature Refrigerant used Refrigerant flow through H.P. side Condensate is sub - cooled in condenser 40 C 15 C -15 C R-717 (NH3) 0.4 kg.s by 5 C 80% each Compression efficiencies Determine the following: (i) Flow rate through evaporator (ii) Tonnes of refrigeration (iii) Total power input (iv) Co-efficient of performance (v) Heat transfer to condenser HPC....
Please also draw the T-S diagrams and PH diagrams to facilitate
understanding. Thank you.
5. The refrigeration system shown below is another variation of the basic vapor compression refrigeration system which attempts to reduce the compression work. In this system, a heat exchanger is used to superheat the vapor entering the compressor while sub-cooling the liquid exiting from the condenser Consider a system of this type that uses refrigerant-134a as its refrigerant and operates the evaporator at -10°C, and the...
Thermodynamics
A two-stage vapour-compression refrigeration plant shown in Figure Q2 diagrammatically below is discharged with Refrigerant 12. Both compressors are single-acting, single-stage reciprocating machines with four cylinders and as isentropic efficiency of 80%. They each have a stroke/bore ratio of 1.2 and run at 600 rev/min with a volumetric efficiency of 90%. The condenser, flash chamber and evaporator pressures are 10 bar, 3 bar and 1 bar respectively. Saturation states exist at points 5 and 3 and the vapour at...
Problem Statement A vapour compression refrigeration system operates between 12 bar and 1.4 bar. The com- pressor inlet is superheated by 4K. The mass flow rate of the refrigerant (R131a) is 0.5 kg/s and the refrigeration effect is 65 kW. If the condenser inlet is at 70°C, determine the coeffi- cient of performance of the system and the isentropic efficiency of the compressor. Answer Table Value Description Coefficient of performance Compressor isentropic efficiency (%)
A standard vapour compression refrigeration cycle operates
between pressures of 220 kPa and 1000 kPa, with a compressor having
an isentropic efficiency of 92.0%. It has a mass flow rate of
0.71kg/s. Evaluate the enthalpy for each of the states in the
cycle: Property State 1 2a 3 4 h kJ/kg Calculate the actual power
consumed by the compressor: W˙compressor= kW Calculate the CoP of
the cycle: CoP=
A standard vapour compression refrigeration cycle operates between pressures of 220 kPa...
Thermodynamics
A two-stage vapour-compression refrigeration plant shown in Figure Q2 diagrammatically below is discharged with Refrigerant 12. Both compressors are single-acting, single-stage reciprocating machines with four cylinders and as isentropic efficiency of 80%. They each have a stroke/bore ratio of 1.2 and run at 600 rev/min with a volumetric efficiency of 90%. The condenser, flash chamber and evaporator pressures are 10 bar, 3 bar and 1 bar respectively. Saturation states exist at points 5 and 3 and the vapour at...
2- In vapour compression refrigeration system, compressor is used because a. It increases cooling effect of cycle b. It makes possible, to remove heat from refrigerant at atmospheric pressure c. It increases the coefficient of performance of the system d. It removes thermal properties of refrigerant 3- The area under pressure volume curve of any thermodynamic process represents a. heat rejected only b. heat absorbed only c. heat absorbed and rejected d. work done 4. What is the correct formula...
4. The following test data were obtained from a R134A vapour-compression refrigeration system Condenser pressure Evaporator pressure Temperature at compressor inlet Temperature at compressor outlet Temperature at condenser inlet Temperature at condenser outlet Temperature at expansion valve inlet 30 Temperature at evaporator outlet 0.9 MPa 0.6 MPa 30 C 120 C 110 C 25 C 20 °C During compression, 3.5 kJ/kg was transferred from the fluid. Determine the coefficient of performance and perform an energy balance on the system
1. MULTI-STAGE COMPRESSION AND EXPANSION The following data refer to a two stage vapour compression system: Condensing temperature Flash intercooler temperature Evaporating temperature Refrigerant used Refrigerant flow through H.P. side Condensate is sub - cooled in condenser 40 C 15 C -15 C R-717 (NH3) 0.4 kg.s by 5 C 80% each Compression efficiencies Determine the following: (i) Flow rate through evaporator (ii) Tonnes of refrigeration (iii) Total power input (iv) Co-efficient of performance (v) Heat transfer to condenser HPC....
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