Experimental examination of utilizing novel radially grooved surfaces in the evaporator of a thermosyphon heat pipe

Bahmanabadi, Amir; Faegh, Meysam; Shafii, Mohammad Behshad

doi:10.1016/j.applthermaleng.2020.114975

Cited by 20 publications

(8 citation statements)

References 32 publications

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“…Finally, it is possible to write the final balance equation of the model, using Eqns. (2)(3)(4)(5)(6)(7)(8), excluding the contributes identified as negligible (i.e., Rcond,ax, Rpc,lv, Rpc,vl, Rv). The model, in its general form, can be written as follow:…”

Section: Definition Of the Thermal Model Of The Thermosyphon Heat Pipementioning

confidence: 99%

“…The vapor starts to move towards the condenser zone thanks differential pressure between the two zones, passing by the inner core of the pipe. Once in the condenser, the vapor condensates releasing latent heat to a could source [4,5]. In a so called "thermosyphon heat pipe", the condensate comes back to the evaporator that is located at the bottom of the device, thank the gravity force.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Model Development of a Thermosyphon Heat Pipe for the Temperature Management in a Wine Fermenter Tank

Malavasi¹,

Cattani²,

Bozzoli³

et al. 2022

MMEP

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The grape must temperature management in a fermenter tank is fundamental to guaranty a high-quality wine. The fermentation is an exothermic process and a good cooling system in fermenter tanks is required. However, for reducing costs and increasing the efficiency of the cooling operation, a passive device based on the heat pipe technology was proposed. Since its thermal sizing must necessarily be accurate to allow a correct temperature of the product during fermentation, in this paper a thermal model of the proposed device was proposed and experimentally validated.

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Section: Definition Of the Thermal Model Of The Thermosyphon Heat Pipementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Model Development of a Thermosyphon Heat Pipe for the Temperature Management in a Wine Fermenter Tank

Malavasi¹,

Cattani²,

Bozzoli³

et al. 2022

MMEP

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show abstract

“…The axial/longitudinal corrugated surface has been found to increase the heat transfer by 15 − 30 % with a constant pumping power in the laminar flow [33,34] and turbulent airflow [35]. The axial/longitudinal and radial grooves also bring benefits to the heat pipe, the drag in pipe flow, reduction of aerodynamic noise, and the pressure difference between the projectile head and the concrete wall [36][37][38][39][40][41]. [42] examined a longitudinally grooved channel to enhance the diffusive transport on moderate Re and discovered the saturated flow that could intensify spanwise motions enhancing the advective transport.…”

Section: No /mentioning

confidence: 99%

Heat Transfer Enhancement and Friction in Double Pipe Heat Exchanger With Various Number of Longitudinal Grooves

Sunu¹,

Anakottapary²,

Suarta³

et al. 2020

Acta Polytech

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It has been found out that heat exchangers with longitudinal grooves produce better heat transfer than those without longitudinal grooves. However, up to now, there have been few investigations and applications of longitudinal grooves in relation to heat transfer associated with friction from the annulus of a heat exchanger. The present investigation examined the effects of longitudinal grooves in a double pipe heat exchanger on the characteristics of heat transfer and friction. Longitudinal rectangular grooves were carved into the outer side of a tube at a specified depth (t) and width (l). The effect of the number of longitudinal grooves, Reynolds number (Re), on the thermal and hydraulic performance was evaluated based on the heat exchanger experimental data. A total of four pipes were used: one pipe with 2 grooves, one pipe with 4 grooves, one pipe with 6 grooves and one pipe with 8 grooves. Water, hot and cold, was used as the working fluid. The test was performed with the cold water as the working fluid, with the Reynolds number from about 33 000 to 46 000 in a counter-flow scheme. The result showed that the number of grooves improved the heat transfer and caused a pressure drop. The increase in heat transfer ranged from 1.05 to 1.15, and the pressure loss of the system reached almost 30% as compared with the smooth annulus, the annulus with no groove. The installation of longitudinal grooves in a heat exchanger system enhanced the process of the heat flow through the boundary but provided a compensation for the pressure loss, which was correlated with the friction and pumping power.

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“…Bahmanabadi et al studied experimentally the performance of a thermosyphon heat pipe with novel radially rectangular-grooved and radially inclined triangular-grooved evaporator surfaces. It was determined that the radially rectangular grooved and radially inclined triangular grooved surfaces with the same heat transfer area increased by 22.9% and 36.13%, respectively, compared to the smooth surface [16]. Celik and Nsofor studied the performance of two cooling systems with grooved tube and regular tube evaporators which had the same size using isobutane (R-600a) as the working fluid.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of Industrial Cooling Systems with the Usage of Different Types of Evaporators: Experimental Study

Erten¹,

Koşan

Işgen

et al. 2021

Gazi University Journal of Science

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Highlights• 1/2" smooth tube and 3/8" grooved tube types evaporators are designed for industrial refrigerators.• Theoretical and experimental analysis and comparison of smooth and grooved tube evaporators.• The system COP value is 2.807, while it is calculated as 3.013 for the second system.• The grooved tube evaporator has better cooling performance compared to the smooth tube evaporator.

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Experimental examination of utilizing novel radially grooved surfaces in the evaporator of a thermosyphon heat pipe

Cited by 20 publications

References 32 publications

Model Development of a Thermosyphon Heat Pipe for the Temperature Management in a Wine Fermenter Tank

Model Development of a Thermosyphon Heat Pipe for the Temperature Management in a Wine Fermenter Tank

Heat Transfer Enhancement and Friction in Double Pipe Heat Exchanger With Various Number of Longitudinal Grooves

Thermodynamic Analysis of Industrial Cooling Systems with the Usage of Different Types of Evaporators: Experimental Study

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