Effect of subcooling and superheating on performance of a cascade refrigeration system with considering thermo- economic analysis and multi-objective optimization
-
2016-07-19 https://doi.org/10.14419/jacst.v5i2.6217
-
Subcooling, Superheating, Cascade, Thermoeconomic Optimization, TOPSIS Method. -
Abstract
In present work, effect of degrees of subcooling and superheating based on thermoeconomic optimization is investigated in two stage-cascade refrigeration system (TS-CRS). At the first step, by using R717 and R744 as refrigerants, a thermoeconomic analysis is applied to TS-CRS. Based on results of the first section and using the genetic algorithm (GA) optimizer implemented in MATLAB, the optimum operative conditions of a specific TS-CRS is determined. Finally, based on the Pareto frontier obtained from the GA optimization, a decision-making strategy is then used to determine a final solution by TOPSIS method. Two single-objective optimization strategies (SOS), i.e. exergetic optimization and cost optimization, are applied on TS-CRS. The aim of the first strategy is to maximize the exergetic efficiency and the aim of the second strategy is minimizing the total annual cost of the system. The case study results show that, compared to the base design, the use of SOS for maximizing of exergetic efficiency can be increases the exergetic efficiency 94.5%. In addition, the use of the second SOS can decrease the total system cost by 11%. Using MOS compared to base design, exergetic efficiency and the total system cost can be increase by 99.1% and 28.6% respectively.
-
References
[1] Getu HM, Bansal PK. "Simulation model of a low temperature supermarket refrigeration system". Int. J. HVAC & R, Res. 12 (4), )2006( , pp.1117–1139.
[2] Pearson A." New development in industrial refrigeration", ASHRAE Journal. )2001(, pp.54-58.
[3] Christensen KG, Bertilsen P. "Refrigeration systems in supermarkets with propane and CO2-energy consumption and economy". 21st International Congress of Refrigeration,Washington DC, )2003(, pp.1–10.
[4] Ge YT, Tassou SA. Control Optimisation of CO2 Cycles for Medium Temperature Retail Food Refrigeration Systems. Int. J. Refrigeration. 32 (6), )2009(, pp.1376–1387.
[5] Wilson I, Maier D. "Carbon dioxide for use as a refrigerant". In: Refrigeration Science and Technology, Proceedings, IIR IRHACE Conference, Innovative Equipment and Systems for Comfort and Food Preservation. The University of Auckland, )2006(, pp.305–311.
[6] Ratts EB, Brown JS. "A generalized analysis for cascading single fluid vapor compression refrigeration cycles using anentropy generation minimization method". Int. J. Refrigeration. 23, )2000(, pp.353–365.
[7] Sawalha S. "Using CO2 in supermarket refrigeration". ASHRAE J. 47 (8), )2005(,pp.26–30.
[8] Eric B, Ratts S. "A generalized analysis for cascading single fluid vapor compression refrigeration cycles using an entropy generation minimization method", Int. J. Refrigeration. 23, )2000,( pp.353-365.
[9] Bhattacharyya S, Mukhopadhyay A, Kumar SA, Sarkar J. "Optimization of CO2-C3H8 cascade system for refrigeration and heating", Int. J. Refrigeration, 28, ) 2005(, pp.1284-1292.
[10] Mafi M, Mousavi Naeynian SM, Amidpour M. "Exergy analysis of multistage cascade low temperature refrigeration systems used in olefin plants", Int. J. Refrigeration, 32 (2), ) 2009(, pp.279-294.
[11] Getu HM, Bansal PK. "Thermodynamic analysis of an R744-R717 cascade refrigeration system", Int. J. Refrigeration, 31 (1),) 2008(, pp.45-54.
[12] Messineo A. "R744-R717 Cascade refrigeration system: performance evaluation compared with a HFC two-stage system", Energy Proc. 14, )2012(, pp.56-65.
[13] Rezayan O, Behbahaninia A. "Thermoeconomic optimization and exergy analysis of CO2/NH3 cascade refrigeration systems", J. Energy. 36, )2011(, pp.888-895.
[14] Dubey AM, Kumar S, Agrawal GD. "Thermodynamic analysis of a transcritical CO2/propylene (R744–R1270) cascade system for cooling and heating applications", Energy Conversion and Management. 86, )2014(, pp.774–783.
[15] Dubey AM, Kumar S. "Numerical optimization of a transcritical CO2/propylene cascaded refrigeration-heat pump system with economizer in HT cycle", J. Indian Academy of Sciences. 40 (2), )2015(, pp.437-454.
[16] Dopazo JA, Seara JF. "Experimental evaluation of a cascade refrigeration system prototype with CO2 and NH3 for freezing process applications", Int. J. Refrigeration, 34 (1), )2011(, pp. 257-267.
[17] Yari M, Mahmoudi SMS. "Thermodynamic analysis and optimization of novel ejector-expansion TRCC (transcritical CO2) cascade refrigeration cycles (Novel transcritical CO2 cycle) ", J. Energy, 36 , )2011(, pp. 6839-6850.
[18] Parekh AD, Tailor RP. " Thermoeconomic Optimization of Cascade Refrigeration System using Refrigerant Pair R404A-R508B", Applied Mechanics and Materials. 110, )2012(, pp.677-684.
[19] Aminyavari M, Najafi B, Shirazi S, Rinaldi F. "Exergetic, economic and environmental (3E) analyses, and multiobjective optimization of a CO2/NH3 cascade refrigeration system", Applied Thermal Engineering. 65, )2014(, pp.42-50.
[20] Rahdar MH, Heidari M, Ataei A, Choi JK. "Modeling and optimization of R-717 and R-134a ice thermal energy storage air conditioning systems using NSGA-II and MOPSO algorithms, "Applied Thermal Engineering. 96, )2016(, pp.217–227.
-
Downloads
-
How to Cite
Keshtkar, M. M. (2016). Effect of subcooling and superheating on performance of a cascade refrigeration system with considering thermo- economic analysis and multi-objective optimization. Journal of Advanced Computer Science & Technology (JACST), 5(2), 42-47. https://doi.org/10.14419/jacst.v5i2.6217Received date: 2016-05-09
Accepted date: 2016-07-09
Published date: 2016-07-19