Thermodynamic and Exergoeconomic Analysis of Refrigeration Cycles

This report provides a comprehensive analysis of exergy in various refrigeration systems. It examines the thermodynamic and exergoeconomic performance of different cycles, including those utilizing vapor-compression refrigeration and organic Rankine cycles. The study explores the impact of different refrigerants such as R134a, R22, and R143a on system efficiency, including exergy and thermal efficiencies. The analysis delves into the contributions of different components, such as turbines and boilers, to exergy destruction. Furthermore, the report reviews existing research on exergy analysis in refrigeration, considering factors like condensing and evaporating temperatures, compressor performance, and the use of nano-fluids. The findings highlight the influence of sub-cooling, temperature differences, and reference temperatures on exergy efficiency. The report also includes comparative studies of different refrigerants, exploring their effects on the coefficient of performance (COP) and exergy performance coefficient (EPC). Finally, the analysis extends to absorption-compression cascade refrigeration systems and multi-stage compression heat pumps, providing a broad overview of exergy analysis in the field of refrigeration.

Ayed alshammari, 201500404
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Thermodynamic and Exergoeconomic Analyses of a Novel Combined Cycle Comprised of
Vapor-Compression Refrigeration and Organic Rankine Cycles
Nima Javanshir, S. M. Seyed Mahmoudi, and Marc A. Rosen
In this research journal, a power cogeneration cycle/refrigeration containing organic Rankine
cycles and vapor-compression refrigeration is planned and examined. The proposed cycle is
demonstrated and assessed from thermo-economic and thermodynamic perspectives through the
software named as Engineering Equation Solver (EES). The features of thermodynamics, along
with exergy price charges for all streams are originated distinctly. Exergy and thermal
productivities of 57.9% and 27.2%, correspondingly, are found for the power cogeneration cycle
by the occupied liquid R143a. The outcomes designate about the arrangement by using R134a
displays the lowermost exergy and thermal productivities amongst additionally employed
liquids, although the systems utilizing R143a and R22 display the maximum exergy and energy
proficiencies, correspondingly. The turbine and boiler subsidize the maximum to the entire
exergy obliteration frequency.
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Ayed alshammari, 201500404
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A review on exergy analysis of vapor compression refrigeration system
J.U. Ahamed∗, R. Saidur, H.H. Masjuki
The research evaluates the potentials of analyses in exergy field investigation at numerous
operational subdivisions where the vapor compression refrigeration systems are utilized. Now, it
is originated that exergy should be contingent on condensing temperature, evaporating
temperature, compressor, and sub-cooling pressure. It moreover is contingent on ecological
temperature. Combinations of R134a and hydrocarbons also elaborate on improved routine in
terms of further refrigerants. Nano fluid and nano lubricant is the main reason to decrease
the energy fatalities in the compressor incidentally. Exergy proficiency can be enhanced through
the sub-cooling process at a temperature of more than 5 ◦ C and lowering the temperature
difference for shrinking and vaporizing temperature. It can be augmented by growing reference
temperature too.
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Exergy Analysis of Vapor Compression Refrigeration System Using R12 and R134a as
Refrigerants
Mohan Chandrasekharan
This research deals with the comparative study of the refrigerant effect on the modest vapor
compression refrigeration system performance. This analysis is founded on the refrigerants
elements named as R134a and R12. A computational model based on exergy and energy
investigation is offered for effect’s study of the degree of sub-cooling and evaporating
temperature, exegetic proficiency, and coefficient of performance of the refrigerator.
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Exergy Analysis of Vapor Compression Refrigeration System with Using R-
407C and R-410A
Jyoti Soni
An estimation model founded on exergy and energy study is offered the impacts survey on the
degree of subcooling, vaporizing temperatures, liquid-vapor heat exchanger efficiency on the
COP and dead state temperatures, second law of EDR and proficiency of the vapor compression
refrigeration cycle for R-410A and R-407C. The assumptions show in the study are shown
below.
1. The exergetic efficiency and COP of R-407C are enhanced than R-410A.
2. The net upsurge in R-407C exergetic competence is 7.02% for 10°C subcooling, and R-410A
is 8.01% at 10°C temperature subcooling.
3. With an upsurge in dead state temperatures, exergetic efficiency upsurges, and EDR decreases
though the factor of performance residues continuous.
4. With the upsurge inefficiency of exergetic efficiency and liquid-vapor heat exchanger, COP
reduces though EDR upsurges.
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Exergy Analysis of R134a Based Vapour Compression Refrigeration Tutor
Pooja Yadav , Amit Sharma
The research shows the exergetic investigation of the actual vapor-compression refrigeration
cycle. The proposed system with R134a is based on vapor compression, refrigeration tutor. The
study argues the constituent’s exergetic obliteration and cycle’s exergetic effectiveness. In this
analysis, they inspect the presentation of the refrigeration instructor in light of thermodynamics
second law. It deliberates the exergy obliteration, which is the misused work possible during a
procedure as an outcome of irreversibility.
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Ayed alshammari, 201500404
Exergy Analysis of Vapour Compression Refrigeration System
Ȧ Ȧ Prateek D. Malwe , Bajirao S. Gawali and Shekhar D. Thakre
Exergy investigation of refrigeration instructor using R12 is completed, and charts are
strategized. The outcomes display that presentation of the system and hereafter exergy
proficiency are exaggerated due to alteration in evaporator and condenser temperature.
Subsequent assumptions have been made.
1) The competence of the system is 58%, which demonstrate the system as not executing
efficiently owing to gas leaks, interior irreversibility’s in the system.
2) Efficiency upsurges with the reduction in evaporator owing to lesser evaporator pressures and
temperatures, a high load evaporator are additional.
3) The lowermost value of exergy proficiency value is originated for the compressor as it surveys
non-isentropic solidity and at advanced condenser pressure, the exact capacity of superheated
refrigerant upsurges.
4) Aim for the letdown of hermetically sealed compressors, maybe that scalded out of motor
windings.
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Performance and exergy analysis of vapor compression refrigeration system using various
alternative of R134a.
Raja Kumar Gond, Ravindra Pratap Chaudhary, Mohammad Amir Khan , Gaurav Jain
An investigation of exergy and energy on an outdated vapor compression refrigeration system
via R290, R152a, R600a, R600, R717, and R123 is completed in theory for different distinctive
proportions, and the outcomes are associated with standard refrigerant termed as R134a. The
outcome assumed that these substitute refrigerant R600a, R600, R152a, and R717 had advanced
efficiency (exergetic) and COP than R134a for evaporative temperature which sorts from the
temperature 248 K to 283 K, and the condensation temperature at 318 K through subcooling 5 K
and superheating 10 K. R600 is originated to be an appropriate emergency between others.
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Exergy analysis of refrigeration system using R600a with TiO2 Nano lubricant
Taiwo O. Babarinde, Stephen A. Akinlabi, Daniel M. Madyira
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Ayed alshammari, 201500404
The irreversibility and second law effectiveness of a household refrigerator via TiO2 Nano
grease in R600a refrigerant were assessed via 0.2, 0.4, and 0.6g/L of Nano lubricant in R600a
refrigerant. The outcomes presented that the entire irreversibility in 0.2 and 0.4g/L TiO2 Nano
lubricant by R600a decreases with 1.5 and 3% also the similar through 0.6g/L TiO2 Nano grease
when associated to the founded liquid. The competence 0.4g/L of Nano emollient was the
uppermost by 45% higher than unpolluted R600a in the system. Usually, R600a with TiO2 Nano
lubricant achieved improved than the founded liquefied in the system.
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Exergy Analysis of Vapor Compression Cycle
Arjun Patel1, Meet Shah2, Darsh Savsani
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Ayed alshammari, 201500404
In this investigational analysis, a window air conditioning system founded on the vapor
compression cycle is improved for investigational study. The structure contains four mechanisms
i.e., a capillary tube (expansion device), compressor, an evaporator, and a condenser based on the
research testing succeeding assumptions are drawn:
1) With the upsurge in mass flow rate, irreparability in Evaporator along with expansion valve
reduces.
2) The high Mass flow rate is not promising for compressor effectiveness.
3) Extreme Obliteration of Exergy is originated in Throttling or Expansion device for the minor
rate of cooling water mass in the Experimental VCR setup. It may be due to the system fault.
4) For numerous mass flow rates, exergy obliteration is dissimilar prominent from the throttle
device to the compressor.
5) It is experimental that the net exergy obliteration is analogous when the structure is 75%, and
100% electric due to the evaporator temperature is very nearby to the reference temperature.
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Comparative Evaluation of Different Refrigerants on a Vapor Compression Refrigeration
System via Exergetic Performance Coefficient Criterion
Guillermo Valencia, Jaison Beltrán, Osvaldo Romero and José Cabrera
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Ayed alshammari, 201500404
This research shows the performance of a vapor compression refrigeration simple cycle,
enchanting the Exergy Performance Constant (EPC) measure, exergy and Coefficient of
Performance (COP) demolished as an analysis technique, utilizing different refrigerants, for
instance, R-22, R-12, R-134A, R-40, and R-410A in the cycle. The refrigerants R-40 and R-22,
which is extremely combustible and volatile joint with air, offered the uppermost COP and EPC
presentation. Consequently, these are measured ozone exhausting materials. Lastly, the pressure
drops do not have the essential impacts on the exergy obliteration amount; at that time, the drop
pressure on the evaporator or condenser does not have to position on the EPC standard.
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ENERGY AND EXERGY ANALYSIS OF ABSORPTION- COMPRESSION CASCADE
REFRIGERATION SYSTEM
Manoj Dixit
S C Kaushik
Akhilesh Arora
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Ayed alshammari, 201500404
In this research, an Absorption- Compression Cascade Refrigeration, including a VCR system in
the low-temperature phase and a VAR system at the first temperature phase, is studied. CO2,
NH3, and R134a have been measured as refrigerants in the compression phase and the H2O-LiBr
refrigerant permeable couple in the preoccupation phase. It also understood utilizing a
mathematical prototypical of the refrigeration system. The analysis shows the outcomes found
concerning the presentation of the refrigeration system founded on energy and exergy
investigation — the comparative study aids to discover the finest refrigerant and suitable
operation constraints.
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Exergy Analysis of a Vapour Compression Refrigeration System using R-134a and
Hydrocarbon as Refrigerants
Mukul Kumar
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Ayed alshammari, 201500404
The research journal focuses on the several phases of the use of waste heat from a multi-stage
vapor compression refrigeration system intercooler using refrigerant such as ammonia. Exergy
and Energy analysis of the multi-stage refrigeration system consuming an intercooler is
achieved. The COP of the proposed method is originated to be improved through 4 to 5% and
deliberated to be nearly 3.24. Heat retrieval determined the intercooler demonstrated to be
valuable as the system’s COP is enhanced along with heat retrieval as 20 kJ/s. It is detected that
COP reduction with the upsurge in condenser temperature at a static evaporator temperature.
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Performance simulation and exergy analysis on multi-stage compression high temperature
heat pumps with R1234ze(Z) refrigerant
Bin Hu, Di Wu, R.Z. Wang
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