Journal articles: 'Aluminum fins'

1

Triqadafi, A. O., T. N. Zafirah, F. J. Kusuma, and S. P. Sakti. "Surface Temperature Distribution of Aluminum Fins Heated using Thermoelectric." Journal of Physics: Conference Series 2013, no. 1 (September 1, 2021): 012012. http://dx.doi.org/10.1088/1742-6596/2013/1/012012.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Jagadeesh, Duraisamy, Ramasamy Venkatachalam, and Gurusamy Nallakumarasamy. "Experimental and numerical study of an overlay composite absorber plate material for a solar air heater." Materials Testing 63, no. 7 (July 1, 2021): 681–86. http://dx.doi.org/10.1515/mt-2020-0109.

Full text

Abstract:

Abstract The research in this paper is a sequel of an earlier work by the author in which experimental and CFD results were compared for an absorber plate made of iron with and without fins for two flow rates. The research yielded a good comparative result between the experimental and computational process for an optimized flow rate and the effect of the fins. The objective of this paper is to verify the effect of the overlay composite absorber plate material on a solar air heater through experimental and computational fluid dynamics. The experimental setup consists of an absorber plate as an overlay composite of aluminum and copper for enhanced heat transfer. Experiments and CFD analysis were done in three configurations. In configuration one, only the aluminum absorber plate with fins was considered. In configuration two, the overlay composite was considered with copper on the top and aluminum at the bottom as fins, and in configuration three, the overlay composite was considered with aluminum at the top and copper at the bottom as fins. A transient 8 hours CFD analysis was carried out using these configurations. While validating the results it was found that the overlay absorber plate Cu-Al was capable of generating a high outlet temperature Max of 88 °C and capable of generating 83 °C air for 5 hours and had good thermal efficiency when compared to the other materials in the other two configuration. It was found that experimental and computational analysis were in very close agreement, and the margin of error between the experimental and computational processes was less than 8 %.

APA, Harvard, Vancouver, ISO, and other styles

3

Jheng, Wern Dare, Shao Hsien Chen, and Zhi Yu Lin. "The Efficiency of Thermoelectric Chip by Different Heatsink." Applied Mechanics and Materials 121-126 (October 2011): 2974–78. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.2974.

Full text

Abstract:

In this study, aluminum nitride, boron nitride, copper, aluminum, with aluminum extruded heat sink as a cooling way of thermoelectric chip. Heat sink temperature change observed and measured the thermoelectric chip output voltage and current. The results showed that with the aluminum extrusion heat sink will increase the efficiency of thermoelectric chip. Copper + aluminum extrusion heat sink, the average electric power increased 173.93%, while the aluminum + aluminum extruded heat sink mean power increased 212.25 %, while the AlN + aluminum extrusion heat sink fins as mean power increased 197.5 %, And the BN + aluminum extrusion heat sink as a heat sink, the average electric power increased 266.17 %.

APA, Harvard, Vancouver, ISO, and other styles

4

HIROMAE, Yoshitaka, Masahiro KURATA, Michio KOBAYASHI, and Masatsugu SAITO. "Wettability and corrosion resistance of prepainted aluminum fins for heat exchangers." Journal of the Surface Finishing Society of Japan 41, no. 11 (1990): 1187–91. http://dx.doi.org/10.4139/sfj.41.1187.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

BAN, Takumi, Roger LARRABEE, Daisuke IEUJI, Kyoji INAOKA, and Mamoru SENDA. "Heat Transfer Characteristics of a Chanel Flow with Aluminum Fabric Fins." Proceedings of Conference of Kansai Branch 2017.92 (2017): M605. http://dx.doi.org/10.1299/jsmekansai.2017.92.m605.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Bilen, K., S. Gok, A. B. Olcay, and I. Solmus. "Investigation of the effect of aluminum porous fins on heat transfer." Energy 138 (November 2017): 1187–98. http://dx.doi.org/10.1016/j.energy.2017.08.015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Jamin, Yorwearth L., and Abdulmajeed A. Mohamad. "Enhanced Heat Transfer Using Porous Carbon Foam in Cross Flow—Part I: Forced Convection." Journal of Heat Transfer 129, no. 6 (August 15, 2006): 735–42. http://dx.doi.org/10.1115/1.2717240.

Full text

Abstract:

Cogeneration of heat and power has become standard practice for many industrial processes. Research to reduce the thermal resistance in heat exchangers at the gas/solid interface can lead to greater energy efficiency and resource conservation. The main objective of this experimental study is to quantify and compare the heat transfer enhancement of carbon foam and aluminum fins. The study measures the heat transfer rate and pressure drop from a heated vertical pipe, with and without porous medium, in forced convection. The largest increase in Nusselt number was achieved by aluminum fins, which was about three times greater than the best carbon foam case.

APA, Harvard, Vancouver, ISO, and other styles

8

Hussein, Maha A., and Mohammed I. Makhoul. "THE EFFECT OF FINS PERFORATION AND MATERIAL TYPE ON THERMAL PERFORMANCE OF A HEAT SINK UNDER NATURAL CONVECTION." IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING 18, no. 3 (November 6, 2018): 446–59. http://dx.doi.org/10.32852/iqjfmme.v18i3.179.

Full text

Abstract:

An experimental study was done to investigate the effect of fin geometrymodification and material type on heat dissipation from a heat sink under natural convection.v-corrugated solid fin and v-corrugated perforated fin were designed for this purpose.Aluminum and Copper metals were selected in designing the fins because their wideapplication in cooling and heating equipment. Three different voltages 110, 150 and 200 Vsupplied to the heat sink to study their effects on the fins performance. Each experimentrepeats two times to reduce the error and the data recorded after reaching the steady stateconditions. The utilization of solid and perforated v-corrugated fins is compared. The resultsshowed that perforated fins dissipated heat more than corresponding solid by 15.4, 34 and32% for aluminum, and 2.7, 2.1 and 4.3% for copper fin in the three voltages. Also, theresults indicated that the heat loss by solid copper fin is greater by 56, 72 and 92% thancorresponding solid aluminum fin and for perforated fin case by 38, 31.7 and 51.9 % at110,150 and 200 V respectively.

APA, Harvard, Vancouver, ISO, and other styles

9

Khan, SheherYar, Adeel Waqas, Naveed Ahmad, Mariam Mahmood, Nadia Shahzad, and Muhammad Bilal Sajid. "Thermal management of solar PV module by using hollow rectangular aluminum fins." Journal of Renewable and Sustainable Energy 12, no. 6 (November 2020): 063501. http://dx.doi.org/10.1063/5.0020129.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Li, Yongtong, Liang Gong, Minghai Xu, and Yogendra Joshi. "Enhancing the performance of aluminum foam heat sinks through integrated pin fins." International Journal of Heat and Mass Transfer 151 (April 2020): 119376. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2020.119376.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Kim, Jaemin, Sangmu Bae, Yongdong Yu, and Yujin Nam. "Experimental and Numerical Study on the Cooling Performance of Fins and Metal Mesh Attached on a Photovoltaic Module." Energies 13, no. 1 (December 23, 2019): 85. http://dx.doi.org/10.3390/en13010085.

Full text

Abstract:

The electrical efficiency and durability of a photovoltaic (PV) cell degrades as its temperature increases. Accordingly, there have been continued efforts to control the cell temperature by cooling the PV module. Generally, passive PV cooling using heat sinks attached on the back of the PV module can improve the electrical efficiency. However, few experimental studies have evaluated the effect of the heat sink shape on PV cooling. Therefore, this study proposed a passive cooling technology using meshes made of iron and aluminum, and performed indoor tests using a solar simulator to analyze the cooling performance. The experimental results demonstrated that iron and aluminum meshes reduced the PV module temperature by approximately 4.35 °C and 6.56 °C, respectively. Additionally, numerical studies were performed using a computational fluid dynamics (CFD) simulation to compare the cooling fins and meshes. The numerical results showed that the cooling fins exhibited a better cooling performance than the metal mesh. However, meshes can be mass-produced and have a high structural stability against wind loads. Meshes are more likely be applied to PV systems than cooling fins if adhesion were improved.

APA, Harvard, Vancouver, ISO, and other styles

12

Takazawa, H., and T. Kajikawa. "Condensing Heat Transfer Enhancement on Vertical Spiral Double Fin Tubes With Drainage Gutters." Journal of Solar Energy Engineering 107, no. 3 (August 1, 1985): 222–28. http://dx.doi.org/10.1115/1.3267682.

Full text

Abstract:

Spiral double-fin tubes with drainage gutters are proposed for a vertical condenser to achieve high-condensing heat transfer performance for ocean thermal energy conversion application. There aluminum tubes have 5 or 10 spiral primary fins per pitch of spiral drainage fin. The condensation occurs mainly on the 0.8-mm-high primary fins; the 2-mm-high drainage fin collects the condensate from the primary fins, and a vertical drainage gutter removes the condensate from the drainage fin. Thus performance degradation due to accumulation of condensate in the vertical direction is avoided. Experiments were carried out using R-22 (chlorodifluromethane) as the working fluid in a shell using seven aluminum tubes (900 mm in effective length and 20 mm in nominal diameter). The drainage fin pitch, the primary fin pitch, shape of primary fin, and number of drainage gutters per tube were selected as parameters. One of the tubes had a 0.2-mm-thick titanium cladding on the inside (water side). The measured working-fluid-side condensing heat transfer coefficients for these tubes were four to six times those for a smooth tube based on the outer surface area.

APA, Harvard, Vancouver, ISO, and other styles

13

Hidayat, Taufiq. "ALAT BANTU PENDINGINAN FILTER OLI MOBIL." T R A K SI 19, no. 1 (November 19, 2019): 9. http://dx.doi.org/10.26714/traksi.19.1.2019.9-19.

Full text

Abstract:

The main function of an oil filter in a car is to filter the oil coming from the charter to be circulated to the engine. The main function of the oil between it is as a lubricant and engine coolant. The engine working temperature is affected by the engine cooling system and the oil function which acts as a cooler. One effort to improve the quality of oil cooling can be done with the addition of cooling aids placed in the oil filter. The purpose of this research is to determine the effectiveness of changes in the working temperature of the engine mounted cooling aids on oil filters. The method used to conduct research is the use of metal and aluminum based tools with the number of fins that are varied. The shape of the tool is a metal sleeve with fin fins that vary in number. The results of the temperature scale under the influence of engine speed in this study is the greatest level of decline with variations in the number of fins of 10oC. Whereas with the use of different materials, a 5oC reduction was obtained in the use of aluminum compared to stainless steels.

APA, Harvard, Vancouver, ISO, and other styles

14

Kim, S. Y., J. W. Paek, and B. H. Kang. "Flow and Heat Transfer Correlations for Porous Fin in a Plate-Fin Heat Exchanger." Journal of Heat Transfer 122, no. 3 (March 10, 2000): 572–78. http://dx.doi.org/10.1115/1.1287170.

Full text

Abstract:

The present experimental study investigates the impact of porous fins on the pressure drop and heat transfer characteristics in plate-fin heat exchangers. Systematic experiments have been carried out in a simplified model of a plate-porous fin heat exchanger at a controlled test environment. The porous fins are made of 6101 aluminum-alloy foam materials with different permeabilities and porosities. Comparison of performance between the porous fins and the conventional louvered fins has been made. The experimental results indicate that friction and heat transfer rate are significantly affected by permeability as well as porosity of the porous fin. The porous fins used in the present study show similar thermal performance to the conventional louvered fin. However, the louvered fin shows a little better performance in terms of pressure drop. For compactness of the heat exchanger, the porous fins with high pore density and low porosity are preferable. Useful correlations for the friction factor and the modified j-factor are also given for the design of a plate-porous fin heat exchanger. [S0022-1481(00)01103-8]

APA, Harvard, Vancouver, ISO, and other styles

15

Hsieh, Chi-Chang, and Yan-Huei Li. "The Study for Saving Energy and Optimization of LED Street Light Heat Sink Design." Advances in Materials Science and Engineering 2015 (2015): 1–5. http://dx.doi.org/10.1155/2015/418214.

Full text

Abstract:

LED lamps are characterized by high energy efficiency, high luminance, and long lifespans. However, the heat radiation problem caused by the extra high power shortens the lifespan and reduces the luminous efficiency of such lamps. This study introduced the development of a novel cooling fin structure for LED lamps and compared its performance with those of commercially available products. The objective of the design was to reduce the maximum temperature and temperature difference on the fin, the amount of aluminum required for fin manufacturing, and CO2emissions to save energy. The study employed the Taguchi method for experiment planning and used gray relational analysis and principal component analysis to determine the optimal parameter combination for cooling fins. The results showed that the maximum temperature on the fin surface dropped by 2.62°C in environments without forced convection, which indicated improved lighting efficiency. Furthermore, the amount of aluminum used per unit volume for fins was reduced by 15%, which effectively reduced CO2emissions during the manufacturing process.

APA, Harvard, Vancouver, ISO, and other styles

16

Boutorabi, Seyyed Mohammad Ali, and Masoud Zandira. "Effects of Using Fins and Carboceramics on the Solidification Characteristics of Aluminum Casting Alloys?" Materials Sciences and Applications 02, no. 07 (2011): 891–98. http://dx.doi.org/10.4236/msa.2011.27119.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Pyle, M., P. L. Brink, B. Cabrera, J. P. Castle, P. Colling, C. L. Chang, J. Cooley, T. Lipus, R. W. Ogburn, and B. A. Young. "Quasiparticle propagation in aluminum fins and tungsten TES dynamics in the CDMS ZIP detector." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 559, no. 2 (April 2006): 405–7. http://dx.doi.org/10.1016/j.nima.2005.12.022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Feng, Qiao Bo, Rui Zhu, Guoan Tang, Jia Jie Zhang, and Yun Zhu. "Thermal Analysis of Heat Sink Employed on Tunnel Lighting Lamps." Applied Mechanics and Materials 303-306 (February 2013): 2719–23. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.2719.

Full text

Abstract:

As a new type of solid-state light source, LED has many advantages. Its lifetime and lighting effect are related to its thermal performance. In this study the effect of heat sink cooling capacity from factors were researched, and the factors were such as material of heat sink, height of heat sink and the number of fins. It was observed that the cooling capacity of heat sink increases with increasing of thermal conductivity. Copper and silver are not fit for heat sink materials though they have excellent cooling capacity because of their high density and price, while aluminum and its alloy are the better choices. And it was revealed that the cooling capacity of heat sink increases with increasing of the height of fins, but this trend has slowed down when the average height reached 40mm.It was also observed that the cooling capacity of heat sink increases with increasing of the number of fins when fins are less, while the heat sink was higher, the cooling capacity maybe decrease with the increasing of the number of fins.

APA, Harvard, Vancouver, ISO, and other styles

19

HISATOMI, Yuji, and Yoshifusa SHOJI. "Effect of Si contents of core and filler alloys on brazeability of aluminum clad fins." Journal of Japan Institute of Light Metals 52, no. 6 (2002): 256–61. http://dx.doi.org/10.2464/jilm.52.256.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Kuntysh, V. B., V. V. Dudarev, and A. B. Sukhotskii. "Experimental Study of Aerodynamic Resistance of Staggered Equilateral Banks of Tubes with Spiral Aluminum Fins." Chemical and Petroleum Engineering 51, no. 5-6 (September 2015): 373–78. http://dx.doi.org/10.1007/s10556-015-0054-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Kalyan Charan, A., R. Uday Kumar, and B. Balunaik. "Evaluation of thermal properties by incorporating perforations of various shapes in fins made with aluminum." Materials Today: Proceedings 46 (2021): 609–14. http://dx.doi.org/10.1016/j.matpr.2020.11.380.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Juneidi, Nuha, Rania Asha, Firas Jarrar, and Fahrettin Ozturk. "Design for Manufacturing of an Aluminum Superplastic AA5083 Alloy Plate-Fin Heat Exchanger." Journal of Materials Science Research 5, no. 2 (March 10, 2016): 115. http://dx.doi.org/10.5539/jmsr.v5n2p115.

Full text

Abstract:

<p class="1Body">Compact, lightweight, strong, and corrosion-resistant heat exchangers are required for many applications. In heat exchangers, plate-fin exchangers design with corrugated fins of triangular cross-sections provide high heat transfer surface area to volume ratio. This study focuses on the design for manufacturing of an aluminum AA5083 alloy plate-fin heat exchanger. The superplastic forming method is considered for the fabrication of the heat exchanger. A two-dimensional plane strain finite element model is used to study the effect of the triangular fins’ aspect ratio on the thickness distribution and the required gas forming pressure cycles. The simulation results show that the thinning in deep channels can be improved by increasing the coefficient of friction but only up to a certain limit. In addition, increasing the coefficient of friction reduces the required applied pressure on the sheet and increases the forming time. The present effort represents a necessary step toward the design of sophisticated corrugated triangular fin surfaces considering both performance and manufacturability.</p>

APA, Harvard, Vancouver, ISO, and other styles

23

Juneidi, Nuha, Rania Asha, Firas Jarrar, and Fahrettin Ozturk. "Design for Manufacturing of an Aluminum Superplastic AA5083 Alloy Plate-Fin Heat Exchanger." Journal of Materials Science Research 5, no. 2 (March 10, 2016): 121. http://dx.doi.org/10.5539/jmsr.v5n2p121.

Full text

Abstract:

<p class="1Body">Compact, lightweight, strong, and corrosion-resistant heat exchangers are required for many applications. In heat exchangers, plate-fin exchangers design with corrugated fins of triangular cross-sections provide high heat transfer surface area to volume ratio. This study focuses on the design for manufacturing of an aluminum AA5083 alloy plate-fin heat exchanger. The superplastic forming method is considered for the fabrication of the heat exchanger. A two-dimensional plane strain finite element model is used to study the effect of the triangular fins’ aspect ratio on the thickness distribution and the required gas forming pressure cycles. The simulation results show that the thinning in deep channels can be improved by increasing the coefficient of friction but only up to a certain limit. In addition, increasing the coefficient of friction reduces the required applied pressure on the sheet and increases the forming time. The present effort represents a necessary step toward the design of sophisticated corrugated triangular fin surfaces considering both performance and manufacturability.</p>

APA, Harvard, Vancouver, ISO, and other styles

24

Arifin, Zainal, Suyitno Suyitno, Dominicus Danardono Dwi Prija Tjahjana, Wibawa Endra Juwana, Mufti Reza Aulia Putra, and Aditya Rio Prabowo. "The Effect of Heat Sink Properties on Solar Cell Cooling Systems." Applied Sciences 10, no. 21 (November 8, 2020): 7919. http://dx.doi.org/10.3390/app10217919.

Full text

Abstract:

High energy demand is leading to the replacement of fossil energy with renewable sources such as solar energy. Solar cells are devices used to generate solar energy. However, when exposed to sunlight with high intensity, a solar cell can suffer a decrease in performance due to overheating. This issue can be addressing by adding a cooling system. This study used a passive cooling system by adding a heat sink with fins to the body panel of the solar cell. The advantage of the passive cooling system is that it does not require additional energy. The number of fins and types of material were varied to obtain the best passive cooling system. The number of fins used was 5, 10, and 15, and the materials used were aluminum and copper. The wind speed vector and the temperature distribution were investigated through simulation. The results showed an increase in the number of fins provided better cooling capacity and increased the photovoltaic performance. The best cooling capability and performance were obtained using 15 fins with a copper base and fin heat sink materials. The decrease in temperature and the increase in efficiency were 10.2 °C and 2.74%, respectively. Therefore, the use of passive cooling system based on heat sinks with fins could provide a potential solution to increase performance and prevent overheating of photovoltaic (PV) panel systems.

APA, Harvard, Vancouver, ISO, and other styles

25

Albeţel, Septimiu, Alexandru Rus, Eveline David, and Vlad Marţian. "The amplitude influence on the thermal and hydraulic performances for a wavy air fin in a compact heat exchanger used in agriculture applications." E3S Web of Conferences 180 (2020): 01006. http://dx.doi.org/10.1051/e3sconf/202018001006.

Full text

Abstract:

Wavy air fins are used in the construction of aluminum compact heat exchangers which are used in thermal equipment for agriculture, construction, and industrial applications. Since atmospheric air convective heat transfer coefficient is among the lowest of all fluids, there is a special interest in the optimizing of the geometry for this type of heat exchangers. One of the biggest challenges in designing cooling solutions for agriculture applications is the clogging effect on the performances of the heat exchangers. Clogging leads to a critical performance reduction of the compact heat exchanger used for these types of applications. This specific study, which was conducted in RAAL S.A company in collaboration with the University “Politehnica” of Timisoara”, checks the influence of the wavy air fin amplitude on the thermal and hydraulic performances and tries to find an optimum solution suitable for these specific projects. So, starting from the standard existing amplitude, different amplitude values were studied analytically. The analytical studies were further confirmed by real life measurements. The scope of the study was to find an optimal value for the amplitude that can further improve the overall performance of the aluminum compact heat exchangers and reduce the clogging effect.

APA, Harvard, Vancouver, ISO, and other styles

26

Khatri, Rahul, Shlok Goswami, Mohd Anas, Shubham Sharma, Satvik Agarwal, and Shivansh Aggarwal. "Performance evaluation of an arched plate solar air heater with porous aluminum wire mesh cylindrical fins." Energy Reports 6 (December 2020): 627–33. http://dx.doi.org/10.1016/j.egyr.2020.11.177.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Yang, C.-Y., and R. L. Webb. "Condensation of R-12 in small hydraulic diameter extruded aluminum tubes with and without micro-fins." International Journal of Heat and Mass Transfer 39, no. 4 (March 1996): 791–800. http://dx.doi.org/10.1016/0017-9310(95)00150-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Hu, Zengrong, Xiaonan Wang, Xiaming Chen, Pengcheng Huan, Weihua Li, and Nagaumi Hiromi. "Study on microstructure and thermal conductivity of semi-solid die casting aluminum alloy." E3S Web of Conferences 268 (2021): 01076. http://dx.doi.org/10.1051/e3sconf/202126801076.

Full text

Abstract:

In order to improve the comprehensive properties of casting aluminum, and to fulfill the requirements of forming thin wall fins for communication products, mechanical stirring was employed to prepare the semi-solid aluminum alloy AlSi8. communication products were produced by the semi-solid die casting process. The microstructure and mechanical and thermal properties were studied. The test results show that the microstructure of semi-solid die-casting samples changes from dendrite to globular microstructure, and the average tensile strength, elongation and thermal conductivity are 220MPa, 7% and 170 W/(m*K), respectively, which is significantly higher than that of the common die-casting samples. It was proved that the semi-solid die casting technology can be used in actual production and improve the products quality.

APA, Harvard, Vancouver, ISO, and other styles

29

Wang, Shixue, Kaixiang Li, Ming Gao, and Junyao Wang. "Experimental exploration of finned cooling structure for the thermal management of lithium batteries with different discharge rate and materials." Thermal Science 24, no. 2 Part A (2020): 879–91. http://dx.doi.org/10.2298/tsci181030069w.

Full text

Abstract:

Lithium-ion batteries in electric vehicles generate heat continuously, leading to high temperature of the battery packs and significant temperature differences between the battery cells, which eventually deteriorate the performance and lifespan of lithium-ion batteries. Therefore, a novel battery thermal management system that equipped the battery pack with fins was proposed and experimentally studied in this paper. The thermal behavior of lithium-ion batteries with different discharge rates and fin thicknesses was investigated. The results show that under natural-convection conditions, the addition of fins restricted the significant increase of the battery pack temperature and improved the uniformity of temperature distribution in the battery pack. Additionally, thicker fins satisfied the temperature requirements at higher discharge rates and greater discharge depths. Under condition of 2C discharge at 80% depth of discharge, compared to no clearance structure the 1 mm and 3 mm aluminum finned structure decreased the maximum temperature rise and the maximum temperature difference by 26.5%, 40.8%, and 9.5%, 33.3%, respectively. However, the trade-offs and optimization between the thermal load, weight, and volume increase caused by the addition of fins should be further investigated.

APA, Harvard, Vancouver, ISO, and other styles

30

Haga, Toshio, Hiroshi Fuse, and Masru Terao. "Fabrication of Thin Heat Sinks by the Die Casting of Semisolid Al-25%Si." Solid State Phenomena 285 (January 2019): 423–28. http://dx.doi.org/10.4028/www.scientific.net/ssp.285.423.

Full text

Abstract:

The viability of casting heat sinks with thin fins using Al-25%Si was investigated, based on assessing cooling curves as well as fluidity tests and emissivity analyses of the resulting heat sinks. The fluidity, castability and emissivity of the semisolid die-cast Al-25%Si were excellent and superior to the results obtained using liquid die-cast A383, an aluminum alloy typically employed for casting. The cooling curves indicate that the significant latent heat of the Si in the alloy improves the fluidity and castability of the material. The addition of P did not greatly affect the refinement of primary Si in the alloy. These findings show that Al-25%Si is suitable for the die-casting of heat sinks with thin fins.

APA, Harvard, Vancouver, ISO, and other styles

31

Singh, Randeep, Sadegh Sadeghi, and Bahman Shabani. "Thermal Conductivity Enhancement of Phase Change Materials for Low-Temperature Thermal Energy Storage Applications." Energies 12, no. 1 (December 27, 2018): 75. http://dx.doi.org/10.3390/en12010075.

Full text

Abstract:

Low thermal conductivity is the main drawback of phase change materials (PCMs) that is yet to be fully addressed. This paper studies several efficient, cost-effective, and easy-to-use experimental techniques to enhance thermal conductivity of an organic phase change material used for low-temperature thermal energy storage applications. In such applications, the challenges associated with low thermal conductivity of such organic PCMs are even more pronounced. In this investigation, polyethylene glycol (PEG-1000) is used as PCM. To improve the thermal conductivity of the selected PCM, three techniques including addition of carbon powder, and application of aluminum and graphite fins, are utilized. For measurement of thermal conductivity, two experimental methods—including flat and cylindrical configurations—are devised and increments in thermal conductivity are calculated. Melting and solidification processes are analyzed to evaluate melting and solidification zones, and temperature ranges for melting and solidification processes respectively. Furthermore, latent heat of melting is computed under constant values of heat load. Ultimately, specific heat of the PCM in solid state is measured by calorimetry method considering water and methanol as calorimeter fluids. Based on the results, the fin stack can enhance the effective thermal conductivity by more than 40 times with aluminum fins and 33 times with carbon fins. For pure PCM sample, Initiation of melting takes place around 37 °C and continues to above 40 °C depending on input heat load; and solidification temperature range was found to be 33.6–34.9 °C. The investigation will provide a twofold pathway, one to enhance thermal conductivity of PCMs, and secondly ‘relatively easy to set-up’ methods to measure properties of pure and enhanced PCMs.

APA, Harvard, Vancouver, ISO, and other styles

32

Bhattacharya, A., and R. L. Mahajan. "Metal Foam and Finned Metal Foam Heat Sinks for Electronics Cooling in Buoyancy-Induced Convection." Journal of Electronic Packaging 128, no. 3 (September 23, 2005): 259–66. http://dx.doi.org/10.1115/1.2229225.

Full text

Abstract:

In this paper, we present our recent experimental results on buoyancy-induced convection in aluminum metal foams of different pore densities [corresponding to 5, 10, 20, and 40 pores per in. (PPI)] and porosities (0.89–0.96). The results show that compared to a heated surface, the heat transfer coefficients in these heat sinks are five to six times higher. However, when compared to commercially available heat sinks of similar dimensions, the enhancement is found to be marginal. The experimental results also show that for a given pore size, the heat transfer rate increases with porosity, suggesting the dominant role played by conduction in enhancing heat transfer. On the other hand, if the porosity is held constant, the heat transfer rate is found to be lower at higher pore densities. This can be attributed to the higher permeability with the larger pores, which allows higher entrainment of air through the porous medium. New empirical correlations are proposed for the estimation of Nusselt number in terms of Rayleigh and Darcy numbers. We also report our results on novel finned metal foam heat sinks in natural convection. Experiments were conducted on aluminum foams of 90% porosity with 5 and 20 PPI with one, two, and four aluminum fins inserted in the foam. All of these heat sinks were fabricated in-house. The results show that the finned metal foam heat sinks are superior in thermal performance compared to the normal metal foam and conventional finned heat sinks. The heat transfer increases with an increase in the number of fins. However, the relative enhancement is found to decrease with each additional fin. The indication is that there exists an optimum number of fins beyond which the enhancement in heat transfer, due to increased surface area, is offset by the retarding effect of overlapping thermal boundary layers. Similar to normal metal foams, the 5 PPI samples are found to give higher values of h compared to the 20 PPI samples due to higher permeability of the porous medium. Future work is planned to arrive at the optimal heat sink configuration for even larger enhancement in heat transfer.

APA, Harvard, Vancouver, ISO, and other styles

33

Peng, Hao, Juan Li, and Xiang Ling. "Study on heat transfer performance of an aluminum flat plate heat pipe with fins in vapor chamber." Energy Conversion and Management 74 (October 2013): 44–50. http://dx.doi.org/10.1016/j.enconman.2013.05.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Ömeroğlu, Gökhan. "Experimental and computational fluid dynamics analysis of a photovoltaic/thermal system with active cooling using aluminum fins." Journal of Photonics for Energy 7, no. 04 (November 1, 2017): 1. http://dx.doi.org/10.1117/1.jpe.7.045503.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Farjam, Aslan, Yannick Cormier, Philippe Dupuis, Bertrand Jodoin, and Antoine Corbeil. "Influence of Alumina Addition to Aluminum Fins for Compact Heat Exchangers Produced by Cold Spray Additive Manufacturing." Journal of Thermal Spray Technology 24, no. 7 (September 10, 2015): 1256–68. http://dx.doi.org/10.1007/s11666-015-0305-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Moon, Seok-Hwan, Yoon-Woo Park, and Hong-Mo Yang. "A single unit cooling fins aluminum flat heat pipe for 100 W socket type COB LED lamp." Applied Thermal Engineering 126 (November 2017): 1164–69. http://dx.doi.org/10.1016/j.applthermaleng.2016.11.077.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

LIU, XIANGDONG, FEIFAN LIU, QIAOBO DAI, FENG YAO, TIANJUN ZENG, YULONG ZHANG, and CHENG YU. "NUMERICAL STUDY ON THE THERMAL PERFORMANCE OF A PHASE CHANGE HEAT EXCHANGER (PCHE) WITH INNOVATIVE FRACTAL TREE-SHAPED FINS." Fractals 28, no. 05 (August 2020): 2050083. http://dx.doi.org/10.1142/s0218348x20500838.

Full text

Abstract:

For alleviating energy shortage and environmental problems, it is of great importance to improve the energy charging and discharging efficiency of thermal energy storage systems. In this context, an innovative phase change heat exchanger (PCHE) with fractal tree-shaped fins is presented in this paper. A numerical investigation of the solidification behaviors in the PCHE with fractal tree-shaped fins is conducted. The dynamic temperature response and the solidification front evolution in the PCHE are analyzed and discussed. Furthermore, two evaluation criteria, including total solidification time and energy charging efficiency, are introduced to quantitatively study the effect of fin material on the solidification heat transfer characteristics. The results indicate that the fractal tree-shaped fin leads to a uniform temperature distribution of phase change material (PCM). The temperature response of fin is faster than that of PCM due to its high thermal conductivity. Moreover, the fractal tree-shaped fin breaks the restriction of gradually forward fashion of solidification front in the traditional PCHE and dramatically improves the energy discharging performance. The material of fractal tree-shaped fins is an essential factor affecting the solidification performance of the PCHE. The energy discharging performance of PCHE with pure copper fins is the best, whereas that with cupronickel fins is the worst. However, from the perspective of practical application, aluminum is the best potential alternative because of its relatively high thermal conductivity, lighter weight, and low cost.

APA, Harvard, Vancouver, ISO, and other styles

38

Widianto, Tri Nugroho, Luthfi Assadad, and Ahmat Fauzi. "Modifikasi Design Heatsink dan Dudukan Peltier pada Alat Transportasi Ikan Segar." Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan 15, no. 2 (December 8, 2020): 151. http://dx.doi.org/10.15578/jpbkp.v15i2.677.

Full text

Abstract:

Alat transportasi ikan segar (ALTIS) adalah sarana pendingin yang dapat mempertahankan mutu ikan segar. ALTIS umumnya digunakan oleh pedagang kelliling dalam transportasi dan distribusi produknya. Komponen yang menentukan kinerja pendingin adalah heatsink dan dudukan peltier. Kedua bagian ini berfungsi dalam transfer panas kotak penyimpanan ikan menuju udara. Namun, biaya produksi dan harga material kedua komponen tersebut cukup tinggi. Penelitian ini bertujuan untuk modifikasi spesifikasi heatsink dan dudukan peltier, agar mendapatkan efisiensi biaya pembuatannya. Heatsink dibuat dari 3 mm plat tembaga dengan 18 sirip aluminium yang memiliki ketinggian 10 mm dan ketebalan 1 mm. Sementara itu, dudukan peltier juga dibuat dari alumunium dengan ketebalan bervariasi (4, 5, 6, dan 10 mm). Performa kedua bagian ini diuji dengan variabel suhu heatsink dalam, heatsink luar, dan ruang penyimpanan ikan, setiap 5 menit selama 95 menit. Hasil pengujian menunjukkan bahwa suhu ruang penyimpanan ikan menggunakan heatsink baru (17,8°C) lebih rendah dari heatsink sebelumnya (18,3°C). Desain heatsink yang baru ini dapat mengurangi biaya pembuatan sebesar Rp. 807.000,00. Dudukan elemen peltier dengan alumunium setebal 4 mm dapat mempercepat proses perpindahan panas dari ruang penyimpanan ikan menuju peltier. Modifikasi ini dapat diaplikasikan untuk menurunkan biaya dan meningkatkan performa ALTIS.ABSTRACTRefrigerated Fresh Fish Container (ALTIS) is a cooler equipment to maintain the quality of fresh fish. ALTIS is usually used by the itinerant fish traders to preserve their products in transportation and distribution. The components that determine the cooler performance are the heatsinks and the Peltier base plate. These components are responsible for transferring the heat from the fish container to the air. However, the production costs and material price for both components are expensive. This study aimed to reduce production costs by modifying the heatsink and Peltier base plate design specifications. The heatsink was made from 3 mm thickness copper and aluminum fins. The aluminum fins were 18 pieces in total, with 1.6 mm thickness and 10 mm height. Meanwhile, the Peltier base plate was also made from aluminum with varied thicknesses (4, 5, 6, and 10 mm). The performance of both parts was evaluated by temperature measurement in the inner heatsink, outer heatsink, and box container for every 5 minutes in 95 minutes. The results showed that the refrigerated container box temperature with the new heatsink (17.8°C) was lower than the existing heatsink (18.3°C). Moreover, the new heatsink design may reduce the production costs by Rp. 807,000.00. Furthermore, the Peltier base plate with a 4 mm thickness could accelerate the heat-dissipating of Peltier. Thus, the modification can be applied for ALTIS production with lower cost and better performance.

APA, Harvard, Vancouver, ISO, and other styles

39

Sukhotski, A. B., and Е. S. Danil’chik. "Convective Heat Exchange of Single-Row Bundles from Tubes with Rolled Aluminum Fins of Various Height at a Low Values of the Reynolds Number." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 64, no. 4 (July 21, 2021): 336–48. http://dx.doi.org/10.21122/1029-7448-2021-64-4-336-348.

Full text

Abstract:

The experimental study of the heat flow intensity of a single-row horizontal air-cooled tubular bundle of heat exchanger with spiral aluminum rolling fins at low Reynolds numbers (Re < 2000) is performed. The geometrical dimensions of the bimetallic finned tubes of the bundle, the following: the outer diameter of the fins d = 56.0 mm; the diameter of the tube at the base d0 = 26.8 mm; fin height h = 14.6 mm; pitch of fins s = 2.5 mm; the average fin thickness Δ = 0.5 mm; the coefficient of finned tubes φ = 19.3; heat transfer length l = 300 mm. The outer diameter of the load-bearing steel tube dн = 25 mm; wall thickness d = 2 mm. The research was carried out by the method of full thermal modeling at a specially designed experimental stand with electric heating of tubes and an exhaust shaft installed above the bundle. The air flow rate through the bundle was regulated by changing the height and cross-sectional area of the exhaust shaft. Calibration experiments were carried out and confirmed the reliability of the data obtained. Then the fins were sanded so to form new types of tubes, which were arranged in a single-row six-tube bundle with a constant relative cross-step σ1 = S1/d = 1.14 = const, and the thermal studies were repeated. As a result, a generalized criterion equation for heat transfer of a finned horizontal single-row bundle at small Reynolds numbers for various heights of the tube finning h = 0-14.6 mm was obtained. The effective height of the tube finning (h = 8 mm) for a single-row horizontal bundle was determined by dimensional and metal-intensive criteria.

APA, Harvard, Vancouver, ISO, and other styles

40

Jeng, Tzer Ming, Sheng Chung Tzeng, Po Tsun Chen, and Wei Kai Huang. "Heat Transfer Analysis for Line-Finned Heat Sink with Vertical Passages." Applied Mechanics and Materials 764-765 (May 2015): 300–304. http://dx.doi.org/10.4028/www.scientific.net/amm.764-765.300.

Full text

Abstract:

Using heat sink to increase the cooling area is the most familiar and fundamental method in LED heat management technology. We develop a new configuration of finned heat sink for LED lamp. It is a circular cylinder with many plate fins radially arranged on the external surface. There are many straight ducts inside the peripheral wall of the cylinder. These ducts form the chimney effect to enhance the heat transfer. This work experimentally investigated the chimney effect on the heat transfer characteristics of the finned heat sink under the free convection state. The aluminum-alloy plate spreader with two vertical plate fins was selected as the control group. The experimental group was the heat sink having the same configuration of the control group but had a vertical passage within the spreader. The results show that the vertical passage did strengthen 8.3~12.1% free convection performance for the present test heat sink.

APA, Harvard, Vancouver, ISO, and other styles

41

Pakrouh, R., M. J. Hosseini, and A. A. Ranjbar. "A parametric investigation of a PCM-based pin fin heat sink." Mechanical Sciences 6, no. 1 (May 19, 2015): 65–73. http://dx.doi.org/10.5194/ms-6-65-2015.

Full text

Abstract:

Abstract. This paper presents a numerical investigation in which thermal performance characteristics of pin fin heat sinks enhanced with phase-change materials (PCMs) designed for cooling of electronic devices are studied. The paraffin RT44 HC is poured into the aluminum pin fin heat sink container, which is chosen for its high thermal conductivity. The effects of different geometrical parameters, including number, thickness and height of fins, on performance are analyzed. Different aspects for heat transfer calculation, including the volume expansion in phase transition as well as natural convection in a fluid zone, are considered in the study. In order to validate the numerical model, previous experimental data and the present results are compared, and an acceptable agreement between these two is observed. Results show that increasing the number, thickness and height of fins leads to a significant decrease in the base temperature as well as operating time of the heat sink.

APA, Harvard, Vancouver, ISO, and other styles

42

KIDO, Taka-aki, Yoshio SATO, and Yoshio TAKESHIMA. "The effect of sheet characteristics on disarrangement of aluminum fins in the heat exchanger of room air conditioner." Journal of Japan Institute of Light Metals 50, no. 2 (2000): 54–59. http://dx.doi.org/10.2464/jilm.50.54.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Yang, C.-Y., and R. L. Webb. "Friction pressure drop of R-12 in small hydraulic diameter extruded aluminum tubes with and without micro-fins." International Journal of Heat and Mass Transfer 39, no. 4 (March 1996): 801–9. http://dx.doi.org/10.1016/0017-9310(95)00151-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Grubišić-Čabo, Filip, Sandro Nižetić, Duje Čoko, Ivo Marinić Kragić, and Agis Papadopoulos. "Experimental investigation of the passive cooled free-standing photovoltaic panel with fixed aluminum fins on the backside surface." Journal of Cleaner Production 176 (March 2018): 119–29. http://dx.doi.org/10.1016/j.jclepro.2017.12.149.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Johnson, Maike, Stefan Hübner, Markus Braun, Claudia Martin, Michael Fiß, Bernd Hachmann, Manfred Schönberger, and Markus Eck. "Assembly and attachment methods for extended aluminum fins onto steel tubes for high temperature latent heat storage units." Applied Thermal Engineering 144 (November 2018): 96–105. http://dx.doi.org/10.1016/j.applthermaleng.2018.08.035.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Yang, C. Y., and R. L. Webb. "A Predictive Model for Condensation in Small Hydraulic Diameter Tubes Having Axial Micro-Fins." Journal of Heat Transfer 119, no. 4 (November 1, 1997): 776–82. http://dx.doi.org/10.1115/1.2824182.

Full text

Abstract:

A semiempirical model is proposed to predict the condensation coefficient inside small hydraulic diameter extruded aluminum tubes having microgrooves. The model accounts for the effects of vapor shear and surface tension forces. Surface tension force is effective in enhancing the condensation coefficient as long as the fin tips are not flooded by condensate. This enhancement increases as mass velocity is reduced. At high mass velocity the flow is vapor shear controlled and the surface tension contribution is very small. The surface tension effect is strongly affected by the fin geometry. A smaller fin tip radius provides a higher surface tension drainage force. A large cross sectional area in the interfin region will allow the surface tension enhancement to occur at lower vapor quality. Separate models are developed for the surface tension and vapor shear controlled regimes and the models are combined in the form of an asymptotic equation. The vapor shear model is based on use of an equivalent mass velocity and the heat-momentum transfer analogy. The surface tension model is analytically based. The model is validated by predicting the authors data for two tube geometries using R-12 and R-134a, and the model predicts 95 percent of the condensation data within ±16 percent.

APA, Harvard, Vancouver, ISO, and other styles

47

Bhattacharya, A., and R. L. Mahajan. "Finned Metal Foam Heat Sinks for Electronics Cooling in Forced Convection." Journal of Electronic Packaging 124, no. 3 (July 26, 2002): 155–63. http://dx.doi.org/10.1115/1.1464877.

Full text

Abstract:

In this paper, we present recent experimental results on forced convective heat transfer in novel finned metal foam heat sinks. Experiments were conducted on aluminum foams of 90 percent porosity and pore size corresponding to 5 PPI (200 PPM) and 20 PPI (800 PPM) with one, two, four and six fins, where PPI (PPM) stands for pores per inch (pores per meter) and is a measure of the pore density of the porous medium. All of these heat sinks were fabricated in-house. The forced convection results show that heat transfer is significantly enhanced when fins are incorporated in metal foam. The heat transfer coefficient increases with increase in the number of fins until adding more fins retards heat transfer due to interference of thermal boundary layers. For the 20 PPI samples, this maximum was reached for four fins. For the 5 PPI heat sinks, the trends were found to be similar to those for the 20 PPI heat sinks. However, due to larger pore sizes, the pressure drop encountered is much lower at a particular air velocity. As a result, for a given pressure drop, the heat transfer coefficient is higher compared to the 20 PPI heat sink. For example, at a Δp of 105 Pa, the heat transfer coefficients were found to be 1169W/m2-K and 995W/m2-K for the 5 PPI and 20 PPI 4-finned heat sinks, respectively. The finned metal foam heat sinks outperform the longitudinal finned and normal metal foam heat sinks by a factor between 1.5 and 2, respectively. Finally, an analytical expression is formulated based on flow through an open channel and incorporating the effects of thermal dispersion and interfacial heat transfer between the solid and fluid phases of the porous medium. The agreement of the proposed relation with the experimental results is promising.

APA, Harvard, Vancouver, ISO, and other styles

48

Marțian, Vlad, Septimiu Albețel, Eveline David, and Mihai Nagi. "Heat transfer and hydraulic performance models for a family of aluminum plate heat exchanger with transversal offset strip fins." Experimental Heat Transfer 30, no. 6 (May 19, 2017): 530–43. http://dx.doi.org/10.1080/08916152.2017.1315467.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Ohashi, Takahiro, Hamed Mofidi Tabatabaei, and Tadashi Nishihara. "Vertical Wall on an Aluminum Alloy Plate Fabricated by Friction Stir Forming." Key Engineering Materials 748 (August 2017): 202–6. http://dx.doi.org/10.4028/www.scientific.net/kem.748.202.

Full text

Abstract:

This paper describes utilization of friction-stir forming (FSF) to generate a single wall on an aluminum alloy plate. The proposed process is as follows. The authors placed a material plate on a die having a variable-width groove and conducted friction stirring on its back surface. The material filled the cavity due to high pressure and heat caused by friction stirring. This process can be applied to generate thermal plate-fins and rib structures. The present study investigates the forming conditions and the corresponding results including the height limit of walls to obtain reference data for applications. In the experiment, a 3mm-thick JIS A5083P-O aluminum plate was utilized as the substrate. With a grove of less than 0.2mm-width, the wall was difficult to generate. The maxim height of the 0.2mm-thick wall formed by FSF was 2.8mm, and its aspect ratio was 14, which was difficult to form using conventional forging. Overall, the relationship between groove width of the die cavity and aspect ratio of maximum wall height to wall thickness followed the fractional curvature. This results implies that the deformable material volume generated by friction stirring is a key factor for wall height.

APA, Harvard, Vancouver, ISO, and other styles

50

Wang, An Ling, Li Gui Xiong, Wei Dong Chen, and Xiang Yun Liu. "The Experimental Study of TiO₂ Nano Compound Coating Applied in Air Conditioner." Advanced Materials Research 415-417 (December 2011): 353–57. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.353.

Full text

Abstract:

Experimental study was carried out with TiO2 Nano-sized compounds coated on aluminum foil to study the cleaning properties and heat transfer effect. The experiments were also carried out for air conditioners which fins of evaporator and condenser were coated with TiO2 nano compound coating. Results show that the foils with TiO2 nano compound coating presents better self-cleaning property and improved heat transfer effect. Air conditioner’s properties with TiO2 nano compound coating evaporator and condenser is higher than that without coating. The maximum heat capacity was found to be increased 8%. The nano-sized liquid showed better synthetic function such as excellent hydrophilic, better cohesion, water flushing resistance.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Aluminum fins'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles