Heat Transfer and Pressure Drop Prediction in an in-Line Flat Tube Bundle by Radial Basis Function Network

Tahseen, Tahseen Ahmad; Rahman, M. M.

doi:10.15282/ijame.10.2014.17.0168

Cited by 5 publications

(6 citation statements)

References 30 publications

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“…Compact HE has been widely used in many industrial applications due to its compactness, low weight, high competence and low cost. It includes two sorts of HE either fin-and-tube or plate-and-fin [4][5][6][7][8]. Fin and tube HE, in particular, has been used in engineering fields such as chemical engineering, petrochemical, heating ventilation and air conditioning, compressors, and fan coils.…”

Section: Introductionmentioning

confidence: 99%

Investigation of thermal-hydraulic performance in flat tube heat exchangers at various tube inclination angles

Adam¹,

Oumer²,

Alias³

et al. 2017

Int. J. Automot. Mech. Eng.

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The performance of compact fin-and-flat tube heat exchangers (HE) can be affected by many geometrical and processing factors and one of them is tube inclination angle. However, the effect of flat tube inclination angle on the thermal-hydraulic performance of the HE is not fully examined. This paper investigates the effects of flat tube inclination angles on heat transfer and pressure drop characteristics of fined flat tube HE when the tubes are deployed in in-line and staggered arrangements. A symmetric numerical method based on FLUENT software was carried out with six different tube inclination angles (0°, 30°, 60°, 90°, 120°, and 150°) in moderately high Reynolds number. From the results, it was observed that heat transfer coefficient increased with the augmentation of the tube inclination angle from 0 o to 90 o and decreased for 120 o and 150 o . With the increase of tube inclination angle, the average Nusselt number rose by 36.3%. This might be due to the reason that the tube surface area increases with the inclination angle, which also results in the largest increment of the pressure drop by 42.0%. Overall, the 90 o tube inclination angle showed the highest enhancement in heat transfer for both inline and staggered configurations with a maximum enhancement of 41.2% for in-line and 32.2% for staggered arrangements. However, the heat transfer enhancements were accompanied by high-pressure drop penalties of up to 44.2% and 42.6% for in-line and staggered arrangements, respectively. Therefore, inclining the tubes at 90 o is recommended where high heat transfer is required. On the other hand, 0 o tube inclination angle is recommended where pumping power is a crucial issue.

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Section: Introductionmentioning

confidence: 99%

Investigation of thermal-hydraulic performance in flat tube heat exchangers at various tube inclination angles

Adam¹,

Oumer²,

Alias³

et al. 2017

Int. J. Automot. Mech. Eng.

Self Cite

View full text Add to dashboard Cite

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“…This method is an indirect way of utilizing the low underground temperature. Another method is direct contact in which part or all of a building has direct contact with the ground surface [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Review of Ground Heat Exchangers for Cooling Application in the Malaysian Climate

2015

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The ground heat exchanger (GHE) is one of the energy sources that has been identified since the 1970s which is able to produce sustainable energy for cooling which is in passive side. GHEs are widely implemented around the world, especially in European countries and a few Asian countries. In Malaysia, application of GHE is still considered as a new passive cooling approach in building energy reduction. Therefore, this paper reviews several important ways of implementing GHE in order to supply passive cooling for any application. The review covers general implementation of the GHE for thermal comfort and agricultural greenhouse cooling. The ground temperature variation used in different researches is also reviewed in this paper as an important part of identifying potential GHE implementations. Design and performance aspects of the GHE are also reviewed. Finally, this paper summarizes the potential and benefit of GHE implementation in the Malaysian climate for cooling applications to reduce the energy used in buildings and greenhouse gas emission.

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“…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

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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.

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Heat Transfer and Pressure Drop Prediction in an in-Line Flat Tube Bundle by Radial Basis Function Network

Cited by 5 publications

References 30 publications

Investigation of thermal-hydraulic performance in flat tube heat exchangers at various tube inclination angles

Investigation of thermal-hydraulic performance in flat tube heat exchangers at various tube inclination angles

A Review of Ground Heat Exchangers for Cooling Application in the Malaysian Climate

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

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