DETERMINATION OF DIAMETER RATIOS FOR MINIMUM ENTROPY GENERATION IN A BOREHOLE GEOTHERMAL HEAT EXCHANGER USING NUMERICAL SIMULATION OF FLOW AND HEAT TRANSFER

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DANESHIPOUR M.; RAFEE R.

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Journal: JOURNAL OF SOLID AND FLUID MECHANICS Year:2016 | Volume:6 | Issue:1 Page(s): 249-258

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Title

DETERMINATION OF DIAMETER RATIOS FOR MINIMUM ENTROPY GENERATION IN A BOREHOLE GEOTHERMAL HEAT EXCHANGER USING NUMERICAL SIMULATION OF FLOW AND HEAT TRANSFER

Author(s)

DANESHIPOUR M. | RAFEE R. | Issue Writer Certificate

Keywords

NUMERICAL SOLUTIONQ2

GEOTHERMAL HEAT EXCHANGERQ1

ENTROPY GENERATIONQ1

TURBULENT FLOWQ2

Abstract

In this work, the diameter ratio of a geo-thermal borehole heat exchanger is determined in a manner that the ENTROPY GENERATION is minimized. For this purpose, the heat transfer and fluid flow in the heat exchanger are simulated. The SST k-w model is used to model the TURBULENT FLOW. The pressure loss calculation for different diameter ratios of the heat exchanger shows that for a diameter ratio of 0.7, the total pressure loss is minimum. The results of the bulk flow temperature show that the outlet temperature increases at a higher heat resistance of the internal wall. The total ENTROPY GENERATION for different diameter ratios at different heat resistance of the internal wall are also presented, and the diameter ratios for minimum ENTROPY GENERATION are determined. The results obtained show that when the heat resistance of the internal wall increases, a minimum ENTROPY GENERATION occurs at higher diameter ratios. On the other hand, reduction in the heat transfer coefficient of the outer wall and the increment in the heat transfer coefficient of the internal wall are not favorable. The increment in heat resistance of the internal wall at higher diameter ratios of the heat exchanger reduces both of these unfavorable effects.

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APA: Copy

DANESHIPOUR, M., & RAFEE, R.. (2016). DETERMINATION OF DIAMETER RATIOS FOR MINIMUM ENTROPY GENERATION IN A BOREHOLE GEOTHERMAL HEAT EXCHANGER USING NUMERICAL SIMULATION OF FLOW AND HEAT TRANSFER. JOURNAL OF SOLID AND FLUID MECHANICS, 6(1), 249-258. SID. https://sid.ir/paper/212785/en

Vancouver: Copy

DANESHIPOUR M., RAFEE R.. DETERMINATION OF DIAMETER RATIOS FOR MINIMUM ENTROPY GENERATION IN A BOREHOLE GEOTHERMAL HEAT EXCHANGER USING NUMERICAL SIMULATION OF FLOW AND HEAT TRANSFER. JOURNAL OF SOLID AND FLUID MECHANICS[Internet]. 2016;6(1):249-258. Available from: https://sid.ir/paper/212785/en

IEEE: Copy

M. DANESHIPOUR, and R. RAFEE, “DETERMINATION OF DIAMETER RATIOS FOR MINIMUM ENTROPY GENERATION IN A BOREHOLE GEOTHERMAL HEAT EXCHANGER USING NUMERICAL SIMULATION OF FLOW AND HEAT TRANSFER,” JOURNAL OF SOLID AND FLUID MECHANICS, vol. 6, no. 1, pp. 249–258, 2016, [Online]. Available: https://sid.ir/paper/212785/en

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