Experimental Investigation to Evaluate the Performance of Helical Coiled Tube Heat Exchanger With Using TiO2 Nanofluid

Mahdi, Qasim Saleh; Fattah, Sahar Abdul; Juma, Firas

doi:10.1115/imece2013-62230

Cited by 2 publications

(2 citation statements)

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“…Additionally, this can be accredited to the increase of Nu in helical tube which is related to the detail that in higher De, stronger "secondary flows" will be gotten that are innovative in the cross section of tube. Therefore, the momentum transmission from wall of the tube increases and as a result of having developed momentum argument near the wall [16]. "Figure ( 8)" shows that Nu in helical coil (air side) higher in coil (1) than coil (2) and coil (3) due to increasing Re but the effect of changing curvature ration is not significant while in shell (oil side) it is higher in coil (1) with percentage (11%, 21%) than coil (2) and coil (3) respectively.…”

Section: Effect Of Curvature Ratio On Nusselt Numbermentioning

confidence: 99%

CFD simulation of helical coil heat exchanger with Different coil pitch to heating heavy fuel oil

Safaa A. Saleh,

Zena K. Kadhim,

Kamil Abdulhusein Khalaf

2023

ejuow

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In current work, CFD simulation of "shell and helical coil heat exchanger" has been done using ANSYS FLUENT package 19.2. Numerical study involved design of helical tube with different curvature ratio (di/Dc) 0.166, 0.153, and 0.142 and different coil pitch (30, 50, 75, and 100) mm has been chosen to study the effect of curvature ratio and coil pitch. In shell side cold fluid (oil) "flow rate" is varying from (0.06 - 0.1) kg/s and hot fluid (air) velocity ranges are from (20 to 48) m/s in helical tube with inlet temperature (200, 225, 250) °C. It has been found out that increasing "oil mass flow rate" from (0.06-0.1) kg/s cause decreasing "oil outlet temperature" about 3% and increasing "heat transfer rate", with percentage 37%. From numerical results the curvature ratio 0.142 gives higher heat transfer rate and oil outlet temperature while higher Dean number and Nusselt number in coil with curvature ratio 0.166. Also, results show increases of coil pitch led to increasing in overall heat transfer coefficient and Nusselt number of the shell side. while, heat transfer, oil outlet temperature effectiveness and pressure drop, decreases along the coil with increasing coil pitch.

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Section: Effect Of Curvature Ratio On Nusselt Numbermentioning

confidence: 99%

CFD simulation of helical coil heat exchanger with Different coil pitch to heating heavy fuel oil

Safaa A. Saleh,

Zena K. Kadhim,

Kamil Abdulhusein Khalaf

2023

ejuow

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“…When the working fluid absorbs solar irradiation, its temperature rises, resulting in useful energy (Q u ) [16,28,32,35].…”

Section: Mathematical Modelmentioning

confidence: 99%

New Evacuated Tube Solar Collector with Parabolic Trough Collector and Helical Coil Heat Exchanger for Usage in Domestic Water Heating

et al. 2023

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Buildings represent approximately two-thirds of the overall energy needs, mainly due to the growing energy consumption of air conditioning and water heating loads. Hence, it is necessary to minimize energy usage in buildings. Numerous research studies have been carried out on evacuated tube solar collectors, but to our knowledge, no previous study has mentioned the combination of an evacuated tube solar collector with a parabolic trough collector and a helical coil heat exchanger. The objective of this paper is to evaluate the thermal behavior of an innovative evacuated tube solar collector (ETSC) incorporated with a helical coil heat exchanger and equipped with a parabolic trough collector (PTC) used as a domestic water heater. To design the parabolic solar collector, the Parabola Calculator 2.0 software was used, and the Soltrace software was used to determine the optical behavior of a PTC. Moreover, an analytical model was created in order to enhance the performance of the new model of an ETSC by studying the impact of geometric design and functional parameters on the collector’s effectiveness. An assessment of the thermal behavior of the new ETSC was performed. Thus, the proposed analytical model gives the possibility of optimizing ETSCs used as domestic water heaters with lower computational costs. Furthermore, the optimum operational and geometrical parameters of the new ETSC base-helical tube heat exchanger include a higher thermal efficiency of 72%. This finding highlights the potential of the heat exchanger as an excellent component that can be incorporated into ETSCs.

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Experimental Investigation to Evaluate the Performance of Helical Coiled Tube Heat Exchanger With Using TiO2 Nanofluid

Cited by 2 publications

References 0 publications

CFD simulation of helical coil heat exchanger with Different coil pitch to heating heavy fuel oil

CFD simulation of helical coil heat exchanger with Different coil pitch to heating heavy fuel oil

New Evacuated Tube Solar Collector with Parabolic Trough Collector and Helical Coil Heat Exchanger for Usage in Domestic Water Heating

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