Performance Analyses of the Industrial Cooling System with Microchannel Condenser: An Experimental Study

Year 2020, Volume: 7 Issue: 3, 83 - 95, 20.10.2020

Meltem Koşan Süleyman Erten Burak Aktekeli Mustafa Aktaş

Abstract

Increasing the efficiency in equipment used in energy systems has a growing interest in the matter of energy efficiency and environmental effects. Microchannel heat exchangers, which will increase the efficiency of heat exchangers in cooling systems and reduce the amount of refrigerant charge, are of great importance. In this study, the theoretical and experimental results of classical and microchannel condensers used in a basic vapor compression cooling system were represented using R449a refrigerant. Two separate industrial systems with classical and microchannel condensers were designed, manufactured and tested under the same conditions. According to the test results performed for 24 hours, the average coefficient of performance, exergy efficiency and CO₂ emission values of the system with classical condenser and microchannel condenser were calculated as 2.086, 2.351; 23.950%, 25.564% and 16.357, 14.438 kg/hour, respectively. As a result, it has been seen that microchannel heat exchanger usage provides an advantage in terms of total energy consumption and total CO₂ emissions compared to the classical system at the rate of approximately 11% and using microchannel heat exchanger in industrial cooling systems has been recommended.

Keywords

cooling, coefficient of performance, exergy, microchannel heat exchanger, CO2 emission

References

• [1] Mohanraj M, Belyayev Y, Jayaraj S, Kaltayev A. “Research and developments on solar assisted compression heat pump systems—a comprehensive review (Part A: modeling and modifi-cations)”, Renew Sustain Energy Rev. 83: 90–123, (2018).
• [2] Gürel AE. Ağbulut Ü. Ergün A. Ceylan İ. "Environmental and economic assessment of a low energy consumption household refrigerator", Engineering Science and Technology. 23(2): 365-372, (2020).
• [3] Park CY, Hrnjak P. “Experimental and numerical study on microchannel and round-tube condensers in a R410A residential air-conditioning system”, Int. J. Refrigeration. 31: 822-31, (2008).
• [4] Moallem E, Cremaschi L, Fisher DE, Hong T. “Effects of frost growth on louvered folded fins of microchannel heat exchangers on the time-dependent air side convective heat transfer coefficient”, Exp Thermal and Fluid Science. 88: 326-35, (2017).
• [5] Zhan B, Shao S, Zang H, Tian C. “Simulation on vertical microchannel evaporator for rack-backdoor cooling of data center”, Applied Thermal Engineering. 164-114550, (2020).
• [6] Tosun M, Doğan B, Öztürk MM, Erbay LB. “Integration of a mini-channel condenser into a household refrigerator with regard to accurate capillary tube length and refrigerant amount”, Int. J. Refrigeration. 98: 428-35, (2019).
• [7] Xu B, Han Q, Chen J, Li F, Wang N, Li D, Pan X “Experimental investigation of frost and defrost performance of microchannel heat exchangers for heat pump systems”, Applied Energy. 103: 180-8, (2013).
• [8] Xu B, Wang Y, Chen J, Li F, Li D, Pan X. “Investigation of domestic air conditioner with a novel low charge microchannel condenser suitable for hydrocarbon refrigerant”, Measurement. 90: 338-48, (2016).
• [9] Zou Y, Hrnjak P. “Comparison and generalization of R410A and R134a distribution in the microchannel heat exchanger with the vertical header”, Science and Technology for the Built Environment, 21: 555-63, (2015).
• [10] Cremaschi L, Yatim AS. “Oil retention in microchannel heat exchangers of an R134a refrigeration system and effects on their energy performance and system COP”, Science and Technology for the Built Environment. 25(3): 272-81, (2019).
• [11] Makhnatch P. Mota-Babiloni A. Rogstam J. Khodabandeh R. “Retrofit of lower GWP alternative R449A into an existing R404A indirect supermarket refrigeration system”. Int. J. Refrigeration. 76: 184–192, (2017).
• [12] Vaitkus L. Dagilis V. “Analysis of alternatives to high gwp refrigerants for eutectic refrigerating systems”, Int. J. Refrigeration. 76: 160–169, (2017).
• [13] Makhnatch P, Mota-Babiloni A, Rogstam J, Khodabandeh R. “Retrofit of lower GWP alternative R449A into an existing R404A indirect supermarket refrigeration system”, Int. J. Refrigeration. 76: 184-92, (2017).
• [14] Aktaş M, Koşan M, Arslan E, Tuncer AD. “Designing a novel solar-assisted heat pump system with modification of a thermal energy storage unit”, Proc IMechE Part A: J Power and Energy. 233(5): 588-603, (2019).
• [15] Fernando P, Palm B, Lundqvist P, Granryd E. “Performance of a Single-Family Heat Pump at Different Working Conditions Using Small Quantity of Propane as Refrigerant”, Experimental Heat Transfer. 20(1): 57-71, (2007). [16] Ergün A. Gürel AE, Ceylan İ. “Ticari Soğutma Sistemlerinde R22 Akişkaninin Alternatifi Olarak R438a Ve R417a Akişkanlarinin Performansinin İncelenmesi”, Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji. 6(4): 824-833, (2018).
• [17] Fang Z, Feng X, Zheng Z, Zhou X, Li L, Huang Y, Wang H, Liu F, “Experimental study on performance optimization of air source heat pump using DOE method”, Experimental Heat Transfer. 32(3): 267-83, (2019).
• [18] Dincer I, Rosen MA. Exergy, second ed. Elsevier. Oxford, UK. 2013.
• [19] Smith R, Delaby O. Targeting flue gas emissions. Trans IChemE. 1991;69:492‐505.
• [20] Koşan M, Demirtaş M, Aktaş M, Dişli E. “Performance analyses of sustainable PV/T assisted heat pump drying system”, Sol. Ener. 199: 657-72, (2020).
• [21] Pawar T, Kulkarni A, Kulkarni G, Patil S, Yadav J, Shikalgar V. “Performance comparison of conventional and microchannel condenser in vapour compression refrigeration system”, International Journal of Innovative Research in Science, Engineering and Technology, 6(4),(2017).