Parametric optimization of overlapped helical baffled heat exchangers by Taguchi method

Du, Tingting; Du, Wei; Che, Kai; Cheng, Lin

doi:10.1016/j.applthermaleng.2015.02.058

Cited by 49 publications

(14 citation statements)

References 8 publications

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“…By determining the effects of the factors on the process output, it is possible to take caution against the factors that create variation during the process design phase. In the Taguchi approach, the signal-to-noise ratio (S / N) is used as a fundamental statistical criterion for evaluating system performance [11]. Signal (S); the actual value that is taken from the system and intended to be measured.…”

Section: Methodsmentioning

confidence: 99%

“…This method is widely used nowadays because it allows achieving the desired results with less experimentation, less time and less cost. Studies in which heat exchanger working performance is optimized by Taguchi method are available in the literature [7][8][9][10][11][12]. However, the application of this method based on energy recovery system is very few.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of plate heat exchanger operating parameters by Taguchi Method

Kocabaş

Savaş

2019

International Journal of Energy Applications and Technologies

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In this study, the heat recovery performance of a plate heat exchanger, which provides air to air heat transfer was investigated. For the experimental setup , a waste heat recovery device was designed and a heat exchanger was placed in it. Three different operating parameters were selected as fresh and exhaust air inlet temperatures and airflow rates. Three levels for each parameter were determined. The effects of changing parameters on the thermal effectiveness were analyzed by the Taguchi method. L9(3 3) orthogonal array was used in performing experiments. Results indicate that higher effectiveness can be obtained at low fresh air inlet temperature, low airflow rate, and high exhaust air inlet temperature. In this way, the optimum process parameter combination was revealed. Then, ANOVA was applied in order to detect the significance order of each parameter. The results show that the most important parameter among the others is the airflow rate. Moreover, the confirmation test was performed in order to obtain the optimum parameter combination. The experimental and predicted values are compatible with each other. This experimental study approves that the Taguchi method can be used in improving the exchanger performance.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of plate heat exchanger operating parameters by Taguchi Method

Kocabaş

Savaş

2019

International Journal of Energy Applications and Technologies

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“…The obtained results showed that a new design of baffle with Pores Axis Ratio (PAR) of 0.190 led to increasing the heat transfer rate from 2% to 65% compared with the simple baffle. Du et al, [8] explored the effects of five geometric parameters on the efficiency of overlapped helical baffled heat exchangers and which are: diameter of tube, overlap size, helix angle, tube layout and central distance of tube. They reported that the effect of overlap size is most significant than the other parameters.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Heat Transfer Enhancement in a Curved Channel with Baffles

Al-Juhaishi

Fawzi

Mohammad

2020

ARFMTS

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Curved channel is commonly used in cement mill's journal bearing. In this study, heat transfer enhancement of curved channel having a rectangular cross-section with using inclined shape baffles is numerically investigated. The effects of different parameters of baffles, i.e. attack angle (α= 45°, 60°, and 90°), and the number of baffles (NB=9 and 13 baffles) are examined. The water is selected as working fluid for laminar and turbulent flow region. A standard k-turbulence model together with enhanced wall treatment is applied to solve the complex flow in Re of 500-5000. Influences of those parameters on heat transfer and friction performances in terms of Nusselt number, friction factor , Nussellt number enhancement ratio, and thermal performance factor, respectively are studied. The results show that the best condition to achieve maximum heat transfer at angle = 90°, NB=13 and Re=5000 compared with other conditions. Furthermore, the maximum thermal performance factor (TEF) of the curved channel with using baffles is 4.4 at the same condition. This indicated that the geometry of baffles inside curved channel can improve the heat transfer significantly with reasonable increase in friction losses.

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“…Saravanakumar et al [27] reported a model for assessing and evaluating a heater with a finned and baffled wall absorber. Using the method of Taguchi, Du et al [28] studied and optimized exchangers of heat with deflectors of helical type configuration. Xue et al [29] studied experimentally the sloshing pressure effects on the tank wall as well as the baffle for various vertical-type baffle configurations and different frequencies.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Hydrodynamic Performance of Fluid Flow in a Rectangular Channel Using Baffles with Gaps

Alhumoud¹,

Almashan²

2020

IJHT

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In the present analysis, a new geometry of obstacles is considered in order to demonstrate its importance in improving the thermal-hydrodynamic performance of hydrogen fluid within a 2D, rectangular section channel subject to a constant surface temperature condition along its hot top wall. The new obstacle has a variable-position square-shaped gap (called: perforated obstacle), to reduce its resistance to the fluid flow, to decrease the skin friction, in order to determine the optimum configuration for a high heat transfer. This gap has three different positions (dg) in the (h) height baffle section, i.e., dg = 0.25h, 0.5h and 0.75h reported, respectively, as A, B and C types. The governing equations among the fluid and solid sections are determined and solved via the finite volume method (FVM). The obtained results are presented for Re = 5 × 103-2 × 104. The thermal improvement factors of the channel containing the perforated baffle appear to be greater than unity for all dg gap positions situated between 1.143 and 4.236, and dependent on the values of dg and Re, which suggest a better thermo-hydrodynamic performance compared to that obtained with a smooth channel. It is found that the thermo-hydrodynamic improvement value in case C of a 0.75h perforated baffle decreases by 2.747% compared to the case of a simple obstacle with no gap, at Re = 2 × 104. However, the value of this same factor increases by 5.901% and 2.794% when the value of dg is equal to 0.25h and 0.5h, respectively, for this same great value of the Reynolds number. Therefore, the perforated baffle model with a small gap position distance (dg = 0.25h) can be selected as the best geometric model for a good thermal improvement with minimal frictions inside the channel. The subject is relevant and important for industrial applications.

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Parametric optimization of overlapped helical baffled heat exchangers by Taguchi method

Cited by 49 publications

References 8 publications

Analysis of plate heat exchanger operating parameters by Taguchi Method

Analysis of plate heat exchanger operating parameters by Taguchi Method

Numerical Study on Heat Transfer Enhancement in a Curved Channel with Baffles

Enhanced Hydrodynamic Performance of Fluid Flow in a Rectangular Channel Using Baffles with Gaps

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