Performance of advanced corrugated-duct solar air collector compared with five conventional designs

Metwally, M.N.; Abou-Ziyan, Hosny; El–Leathy, Abdelrahman

doi:10.1016/s0960-1481(96)00043-2

Cited by 42 publications

(22 citation statements)

References 15 publications

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“…They are also used in absorption chillers and solar collectors. Moreover, polymer heat exchangers are widely applied in the food industry; refrigeration, air-conditioning, and ventilation industry; cryogenic industry; automotive industry; computer industry; and chemical industry [64][65][66][67][68][69][70]. They are also well compatible with liquid metals.…”

Section: Polymer Heat Exchangersmentioning

confidence: 99%

Revolutionizing heat transport enhancement with liquid metals: Proposal of a new industry of water-free heat exchangers

Jing

2011

Front. Energy

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Water is perhaps the most widely adopted working fluid in conventional industrial heat transport engineering. However, it may no longer be the best option today due to the increasing scarcity of water resources. Furthermore, the wide variations in water supply throughout the year and across different geographic regions also makes it harder to easily access. To address this issue, finding new alternatives to replace water-based technologies is imperative. In this paper, the concept of a water-free heat exchanger is proposed and comprehensively analyzed for the first time. The liquid metal with a low melting point is identified as an ideal fluid that can flexibly be used within a wide range of working temperatures. Some liquid metals and their alloys, which have previously received little attention in thermal management areas, are evaluated. With superior thermal conductivity, electromagnetic field drivability, and extremely low power consumption, liquid metal coolants promise many opportunities for revolutionizing modern heat transport processes: serving as heat transport fluid in industries, administrating thermal management in power and energy systems, and innovating enhanced cooling in electronic or optical devices. Furthermore, comparative analyses are conducted to understand the technical barriers encountered by advanced water-based heat transfer strategies and clarify this new frontier in heat-transport study. In addition, the unique merits of liquid metals that could lead to innovative heat exchanger technologies are evaluated comprehensively. A few promising industrial situations, such as heat recovery, chip cooling, thermoelectricity generation, and military applications, where liquid metals could play irreplaceable roles, were outlined. The technical challenges and scientific issues thus raised are summarized. With their evident ability to meet various critical requirements in modern advanced energy and power industries, liquid metal-enabled technologies are expected to usher a new and global era of water-free heat exchangers.

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Section: Polymer Heat Exchangersmentioning

confidence: 99%

Revolutionizing heat transport enhancement with liquid metals: Proposal of a new industry of water-free heat exchangers

Jing

2011

Front. Energy

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“…Hasil yang dipaparkan adalah bahwa plat absorber bentuk V memberikan efisiensi lebih tinggi dari yang datar. Metwally et al [2] mengevaluasi unjuk kerja kolektor surya udara dengan beberapa bentuk saluran dan menemukan bahwa plat bentuk V memberikan kenaikan temperatur udara tertinggi saat udara mengalir di bawah plat tersebut. Selain itu, Metwally juga menemukan aspek rasio saluran (didesiripisikan sebagai perbandingan kedalaman saluran terhadap lebar satu gelombang) untuk kemiringan gelombang dengan sudut 30 o yang terbaik adalah 0,61 dibandingkan rasio lain yang diteliti, yaitu: 0,30 dan 0,92.…”

Section: Pendahuluanunclassified

“…Upaya yang sering dilakukan adalah memasang 'penghalang' untuk memperkecil rugi-rugi kehilangan panas dari absorber ke kaca penutup dan ke lingkungan. Metwally et al [2] mengevaluasi unjuk kerja kolektor matahari udara dengan penambahan penghalang berupa honeycomb/ slat pada beberapa rasio slat. Slat yang dipasang tidak menyentuh kaca penutup dan absorber.…”

Section: Pendahuluanunclassified

“…Oleh karena itu perlu dilakukan penelitian untuk menggabungkan plat kolektor bentuk V dengan honeycomb agar diperoleh performansi kolektor surya yang optimal. Jika Metwally et al [2] meneliti kolektor dengan kedalaman saluran udara yang berubah-ubah, maka pada penelitian ini akan dilakukan untuk kedalaman saluran udara yang tetap. Sedang Ghoneim [5] meneliti celah di atas dan di bawah honeycomb, pada penelitian ini akan diteliti tinggi honeycomb yang dipakai pada celah antara kaca penutup dan plat yang berbeda-beda.…”

Section: Pendahuluanunclassified

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Unjuk Kerja Kolektor Surya dengan Absorber Bentuk V yang Dilengkapi Honeycomb dengan Beberapa Aspek Rasio

Handoyo¹,

Sudiyanto²,

Prabowo³

et al. 2011

jtm

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ABSTRAKAlat yang memanfaatkan radiasi matahari secara sederhana tetapi penting dan dapat menolong masyarakat di daerah tropis seperti Indonesia adalah kolektor surya. Kolektor surya dapat diaplikasikan sebagai pemanas udara untuk proses pengeringan hasil pertanian. Salah satu upaya untuk meningkatkan unjuk kerja kolektor adalah menggunakan plat absorber berbentuk V atau memasang honeycomb di atas plat absorber untuk mengurangi rugi panas. Pada paper ini dibahas penggabungan keduanya. Dari hasil pengujian didapat bahwa kolektor surya dengan plat absorber bentuk V yang dilengkapi honeycomb mempunyai unjuk kerja terbaik saat udara mengalir dalam saluran dengan kecepatan 0,5 m/s dengan aspek rasio H/L = 3/1. Unjuk kerja yang dimaksud adalah efisiensi kolektor dan kenaikan temperatur aliran udara melintasi kolektor.Kata kunci: Kolektor surya, plat absorber V, honeycomb. ABSTRACT A simple apparatus using solar radiation that is essential for people in tropical area

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“…Sahu and Bhagoria [5] reported the augmentation of heat transfer coefficient by using transvers ribs on absorber plate of solar air collector. Metwally et al [6] experimentally investigated the thermal performance of corrugated-duct solar air collector. Yeh [7] studied the effect of parallel barriers on the collector efficiency of single pass flat-plate solar air collector.…”

Section: Introductionmentioning

confidence: 99%

Thermal efficiency of single-pass solar air collector

Ibrahim

Ibarahim

Yatim

et al. 2013

AIP Conference Proceedings

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Performance of advanced corrugated-duct solar air collector compared with five conventional designs

Cited by 42 publications

References 15 publications

Revolutionizing heat transport enhancement with liquid metals: Proposal of a new industry of water-free heat exchangers

Revolutionizing heat transport enhancement with liquid metals: Proposal of a new industry of water-free heat exchangers

Unjuk Kerja Kolektor Surya dengan Absorber Bentuk V yang Dilengkapi Honeycomb dengan Beberapa Aspek Rasio

Thermal efficiency of single-pass solar air collector

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