Overall Heat Transfer Enhancement of Triangular Obstacles

Şahin, Bayram; Manay, Eyüphan; Özceyhan, Veysel

doi:10.15282/ijame.8.2013.17.0105

Cited by 8 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This peak cannot be identified in the LBL simulations nor in the baseline TBL simulation without the wall-attached cube. Sahin et al [18], studied, the effects of equilateral triangular bodies placed in the channel on heat transfer and pressure drop characteristics were examined numerically. Reynolds number varied from 5000 to 10000.…”

Section: Introductionmentioning

confidence: 99%

Impact of Geometry of Electronic Components on Cooling Improvement

Meghdir¹,

Benabdallah²,

Dellil³

2019

IJHT

View full text Add to dashboard Cite

In this paper we have numerically treated the thermal and dynamic aspect of different prismatic bodies simulating electronic components, heated and mounted on the lower wall of a channel. These components are cooled by forced convection using a turbulent flow flowing along the channel and an impinging jet flowing from the upper wall perpendicularly to them. The fluid used is air of which we vary the Reynolds number in order to see its impact on the component cooling. We opted for four different geometries of the prismatic body taken in the same working conditions. We compared the results obtained to propose one of the geometries which will permit a better evacuation of the heat, thus a good cooling of the component. By combining an unstructured mesh with the finite volume method, the solution is obtained by using the SIMPLE algorithm (pressure-velocity coupling). Turbulence is modeled using the so-called Shear Stress Transport (SST) model to evaluate the heat exchange in these configurations. This numerical study is carried out with the code ANSYS.CFX 14 to evaluate the thermal exchanges.

show abstract

Section: Introductionmentioning

confidence: 99%

Impact of Geometry of Electronic Components on Cooling Improvement

Meghdir¹,

Benabdallah²,

Dellil³

2019

IJHT

View full text Add to dashboard Cite

show abstract

“…Therefore, several ORC suppliers are investigating the use of naturally occurring substances such as hydrocarbons, NH 3 , and CO 2 [16]. In published literature, ORC researches have largely focused on the operating fluid performance analysis [6,[11][12][13][14][15][17][18][19][20][21]; there is a lack of research on the geometric specifications of heat exchangers and heat transfer analysis (only a few studies exist such as Jung and Krumdieck [22] and Hossain and Bari [23]). Since a waste heat exchanger (WHE) is one of the key components in waste heat recovery, the present study performs heat transfer analysis of a simple counterflow WHE that could provide significant information for the development of 3 kW-ORC waste heat recovery system from the exhaust gas of ICE using ammonia as an organic operating fluid.…”

Section: Introductionmentioning

confidence: 99%

Numerical Heat Transfer Analysis of Waste Heat Exchanger for Exhaust Gas Energy Recovery

2015

View full text Add to dashboard Cite

Waste heat is heat that is usually thrown into the environment even though it could still be reused for some useful and economic purpose. For example, any exhaust gas stream with a temperature of above 80°C has the potential for significant waste heat recovery. Therefore, an attempt to reuse the exhaust waste energy to transfer the energy to any energy cycle is a worthwhile effort. In the present study, the waste energy from the exhaust gas of an internal combustion engine is recovered by converting it to ammonia (NH 3) as an organic operating fluid in the Organic Rankine Cycle (ORC), which aims to produce 3 kW turbine power. To achieve a specific amount of energy, a key component in waste heat recovery is the heat exchanger. In the present study, a steady-state numerical analysis of heat transfer is conducted for various dimensional configurations of the waste heat exchanger using ammonia. The findings showed that the exhaust gas mass flow rate only has a very minimal effect on the length of the pipe when the exhaust temperature exceeds 400°C.

show abstract

“…Designs have recently been provided that use air conditioning for automotive evaporators and condensers. Recent developments in automotive aluminum manufacturing technology have made the cost of building flat tube heat exchangers more propitious (Muthucumaraswamy & Velmurugan, 2013;Naga Sarada et al, 2012;Rao et al, 2011;Sahin, Manay, & Ozceyhan, 2013;Suryanarayana, Srinivasa Rao, Reddy Prasad, Sharma, & Sarma, 2011;Webb & Kim, 2005). In addition, flat tube heat exchangers are expected to provide the best air-side heat transfer coefficients and minimum air-side pressure drop compared with circular tube heat exchangers; the pressure drop in flat tubes is expected to be less than in circular tubes due to a smaller wake area.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study of Air Flow and Heat Transfer over in–Line Flat Tube Bank

Tahseen¹,

Ishak²,

Rahman³

2014

Int J Automot Mech Eng

View full text Add to dashboard Cite

An experimental study was made to investigate heat transfer and air flow around the flat tubes of in-line flat tube banks with laminar forced convection. Measurements were conducted for sixteen tubes in the flow direction; four rows of four tubes, three air velocities (0.6, 0.8 and 1.0 m/s) and Reynolds numbers Re Dh = 527, 703 and 880, where D h is the hydraulic diameter of the tube. The total heat flux supplied in all the tubes was 968, 2259 and 3630 W/m 2 , respectively. The study results indicate that the average Nusselt number of all the flat tubes increased by 23.7%-36.7% with Reynolds numbers varying from 527 to 880 with fixed heat flux; also the average Nusselt number increased by 11.78%-23.75% at varying heat fluxes of 968, 2259 and 3630 W/m 2 , respectively at Reynolds number Re = 703. In addition, the pressure drop decreased with the increase of Reynolds number. The Nusselt number-Reynolds number correlation was found to be 2 1  C Nu C Re and the correlation yielded good predictions of the measured data with the mean error R 2 = 99.2%.

show abstract

Overall Heat Transfer Enhancement of Triangular Obstacles

Cited by 8 publications

References 20 publications

Impact of Geometry of Electronic Components on Cooling Improvement

Impact of Geometry of Electronic Components on Cooling Improvement

Numerical Heat Transfer Analysis of Waste Heat Exchanger for Exhaust Gas Energy Recovery

An Experimental Study of Air Flow and Heat Transfer over in–Line Flat Tube Bank

Contact Info

Product

Resources

About