Experimental investigation of thermal performance of aluminum finned heat exchangers and open-cell aluminum foam heat exchangers

Sertkaya, Ahmet Ali; Altınışık, Kemal; Dinçer, Kevser

doi:10.1016/j.expthermflusci.2011.08.008

Cited by 63 publications

(24 citation statements)

References 21 publications

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“…They concluded that for the same fan power and heat transfer, the metal foam heat exchanger can be made smaller and lighter, but is still much more expensive than the louvered fin heat exchanger. Sertkaya et al [40] compared three metal foam heat exchangers (10, 20 and 30 PPI) to three finned heat exchangers with the same tube layout and overall dimensions. In contrast to most other studies, where the foamed heat exchangers outperform the finned heat exchangers, their measurements showed that the finned heat exchangers provide a higher heat transfer and a lower pressure drop than the foamed heat exchangers.…”

Section: Introductionmentioning

confidence: 99%

Comparison of metal foam heat exchangers to a finned heat exchanger for low Reynolds number applications

Huisseune

Schampheleire

Ameel

et al. 2015

International Journal of Heat and Mass Transfer

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Section: Introductionmentioning

confidence: 99%

Comparison of metal foam heat exchangers to a finned heat exchanger for low Reynolds number applications

Huisseune

Schampheleire

Ameel

et al. 2015

International Journal of Heat and Mass Transfer

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“…Sertkaya et al [8] compared thermal and hydraulic performance of aluminum foam (three different pore sizes) with aluminum fin (three different spacing) using a cross flow heat exchanger. characteristics as well as lower pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal and Hydraulic Performance of V-Shape Corrugated Carbon Foam

Aboelsoud¹,

Wu²,

Chow

et al. 2013

Journal of Heat Transfer

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In air-cooled heat exchangers, air-side thermal resistance is usually the largest compared to conduction and liquid-side thermal resistances. Thus, reducing the air-side thermal resistance can greatly improve overall cooling performance. The performance of an air-cooled heat exchanger is usually characterized by the rate of heat which can be transferred and the pumping power required to convect the heat away. This paper presents a method of utilizing V-shape corrugated carbon foam to improve thermai performance. The air-side heat transfer coefficient and the pressure drop across the foam have been investigated using different V-shape foam geometrical configurations obtained by varying its length and height. Based on design considerations and availability, the foam length has been chosen to be 25.4, 38.1, and 52.1 mm, while its height is 4.4, 6.8, and 11.7mm, resulting in nine different test pieces of foam with different heights and lengths. A total number of 81 experiments were carried out with different air face velocities (0.7 -9m/s) and heat fluxes at the heater suiface (0.5 -2W/cm^). The pressure drop across the Vshape corrugated carbon foam as well as inlet air, exit air, foam, and ambient temperatures were measured. Of the nine V-shape configurations, the foam with the shortest length and tallest height gives the best performance. The present results are also compared with the results of prior work using different carbon foam geometries. It is shown that V-shape corrugated carbon foam provides better heat transfer coefficient and the overall performance.

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“…Kapalı hücreli köpük metaller ise düşük termal iletkenliklerinden dolayı termal kalkan olarak kullanılırlar. Bu uygulamaya örnek olarak, yekpare soğutma radyatörleri ve bilgisayar çipleri ile güç elektroniği için mikro elektronik cihazlar verilebilir [1][2][3][4][5][6][7][8][9][10][11]. Metal köpükler üzerine yapılan çalışmalar 1960'lı yıllara kadar dayanmaktadır.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Alümi̇nyum Köpüklerde İki̇ Boyutlu Isi Transferi̇ni̇n Deneysel Ve Sayisal Olarak İncelenmesi̇

Sertkaya¹

2016

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETBu çalışmada açık hücreli alüminyum köpükler ısı değiştirici formuna getirilip iki boyutlu ısı transferi deneysel ve sayısal olarak incelenmiştir. 10, 20 ve 30 PPI (Number of Pores Per Inch) gözenek yoğunluklarına sahip açık hücre alüminyum köpükler sabit ısı akısı için ısı değiştiricinin kanatlarını oluşturmuştur. Alüminyum köpük üzerinde, X-Y düzleminde özellikle ısıtıcıya yakın bölgelerde sık olarak yerleştirilen ısıl çiftlerle sıcaklıklar ölçülmüştür. Elde edilen sıcaklıklar yardımıyla bütün yüzey üzerindeki sıcaklık dağılımı bulunmuştur. Grafikler, yüzey sıcaklıkları ve giriş sıcaklığı (ΔT) arasındaki farka dayalı olarak çizilmiştir. Ayrıca her üç ısı değiştirici için basınç düşüşü bulunmuştur. Sistem için iki boyutlu ısı transferi denklemleri sayısal olarak elde edilmiştir. Elde edilen denklemler merkezi fark yöntemi kullanılarak çözülmüştür.Anahtar Kelimeler: Alüminyum köpük, gözenekli ortam, ısı transferi EXPERIMENTAL AND NUMERICAL ANALYSIS OF A TWO DIMENSIONAL HEAT TRANSFER ON OPEN CELL ALUMINUM FOAMS ABSTRACTIn this study, heat transfer was investigated in open cell aluminum foams formed into a heat exchanger experimentally and numerically as two dimensional. The open cell aluminum foams with pore density of 10, 20, 30 PPI were used as the heat exchanger fins formed for a constant heat flow. Temperatures were measured using thermocouples located on several points in the X-Y planes of the aluminum foams especially on areas near the heaters. The temperature distribution for the whole area was obtained from the measured temperatures,. The graphs were plotted based on the difference between the surface temperatures and the inlet temperature (ΔT). In aditıon for each of the three heat exchanger pressure drop was found. Two dimensional heat transfer equations for the system were derived in the numerical solution. Then the obtained equations were discretized by using the central difference method and finally solved.Keywords: Aluminum foam, porous media, heat transfer GİRİŞ (INTRODUCTION)

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Experimental investigation of thermal performance of aluminum finned heat exchangers and open-cell aluminum foam heat exchangers

Cited by 63 publications

References 21 publications

Comparison of metal foam heat exchangers to a finned heat exchanger for low Reynolds number applications

Comparison of metal foam heat exchangers to a finned heat exchanger for low Reynolds number applications

Experimental Investigation of Thermal and Hydraulic Performance of V-Shape Corrugated Carbon Foam

Alümi̇nyum Köpüklerde İki̇ Boyutlu Isi Transferi̇ni̇n Deneysel Ve Sayisal Olarak İncelenmesi̇

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