Review of solar water heaters incorporating solid-liquid organic phase change materials as thermal storage

Kee, Shin Yiing; Munusamy, Yamuna; Ong, Kok Seng

doi:10.1016/j.applthermaleng.2017.12.032

Cited by 140 publications

(41 citation statements)

References 95 publications

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“…The use of phase change materials (PCM) to store solar energy in different applications was developed by many researchers in the last two decades, and the use of this technology in the so-called high-temperature applications is increasing [REF]. Within this context, high-temperature applications are those using storage at temperatures higher than 150 °C, going up to 1000 °C in applications such as concentrated solar power, and being between 200 °C and 400 °C in applications that use solar energy in industry or for industrial waste heat recovery [ 2 , 3 , 4 , 5 , 6 ]. Among the available TES technologies, latent TES is seen as a good potential candidate due to its ability to provide heat at a constant temperature, matching the requirement of steam generation, one of the most used heat transfer fluids (HTF) in the industry [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Phase Change Materials (PCM) Used for Solar Process Heat Applications

et al. 2021

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The high intermittency of solar energy is still a challenge yet to be overcome. The use of thermal storage has proven to be a good option, with phase change materials (PCM) as very promising candidates. Nevertheless, PCM compounds have typically poor thermal conductivity, reducing their attractiveness for commercial uses. This paper demonstrates the viability of increasing the PCM effective thermal conductivity to industrial required values (around 4 W/m·K) by using metal wool infiltrated into the resin under vacuum conditions. To achieve this result, the authors used an inert resin, decoupling the specific PCM material selection from the enhancement effect of the metal wools. To ensure proper behavior of the metal wool under standard industrial environments at a broad range of temperatures, a set of analyses were performed at high temperatures and an inert atmosphere, presenting a thorough analysis of the obtained results.

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Section: Introductionmentioning

confidence: 99%

Improvement of Phase Change Materials (PCM) Used for Solar Process Heat Applications

et al. 2021

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“…In general, PCMs are distinguished according to the phase change they undergo at a particular temperature level and are classified based on their physical transformation of absorbing/storing or releasing thermal energy capabilities, as result of undergoing a particular phase transformation from one state to another (e.g. solid to liquid or liquid to gas) at their operating temperatures [4]. It is evident from the critical examination that PCMs can enhance the performance as well as the safety, with respect to their premium energy storage.…”

Section: Introductionmentioning

confidence: 99%

Phase change materials for building construction: An overview of nano-/micro-encapsulation

Sivanathan

Dou

Wang

et al. 2020

Nanotechnology Reviews

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Buildings contribute to 40% of total global energy consumption, which is responsible to 38% of greenhouse gas emissions. It is critical to enhance the energy efficiency of buildings to mitigate global warming. In the last decade, advances in thermal energy storage (TES) techniques using phase change material (PCM) have gained much attention among researchers, mainly to reduce energy consumption and to promote the use of renewable energy sources such as solar energy. PCM technology is one of the most promising technologies available for the development of high performance and energy-efficient buildings and, therefore, considered as one of the most effective and on-going fields of research. The main limitation of PCM is its leakage problem which limits its potential use in building construction and other applications such as TES and textiles, which can be overcome by employing nano-/micro-encapsulation technologies. This paper comprehensively overviews the nano-/micro-encapsulation technologies, which are mainly classified into three categories including physical, physiochemical and chemical methods, and the properties of microcapsules prepared. Among all encapsulation technologies available, the chemical method is commonly used since it offers the best technological approach in terms of encapsulation efficiency and better structural integrity of core material. There is a need to develop a method for the synthesis of nano-encapsulated PCMs to achieve enhanced structural stability and better fracture resistance and, thus, longer service life. The accumulated database of properties/performance of PCMs and synthesised nano-/micro-capsules from various techniques presented in the paper should serve as the most useful information for the production of nano-/micro-capsules with desirable characteristics for building construction application and further innovation of PCM technology.

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“…Bu malzemeler, duyulur ısı depolama ve termokimyasal ısı depolama teknolojilerine kıyasla daha büyük miktardaki ısının depolanmasına izin vermesi ve faz değişiminin neredeyse izotermal şartlarda gerçekleşmesi nedeniyle ön plana çıkmaktadır [2]. FDMler, ısıl enerji depolama kapasiteleri ve faz değişim sıcaklık aralıklarına bağlı olarak, güneş enerjili sistemler, binalarda enerjinin korunumu, ısıl yalıtım, ısıl ayarlamalı tekstil malzemeleri, su ısıtıcılar, buzdolapları gibi geniş bir yelpazede yer alan ısıl enerji depolama uygulamalarında kullanılabilmektedir [3][4][5][6][7][8]. Bu malzemelerin özellikle binalarda kullanılması, enerji maliyetlerinin azaltılmasına katkı sağladığı gibi enerji arz-talep dengesinin korunmasında da önemli rol oynamaktadır [9] FDMler genel olarak organik, inorganik ve ötektik olmak üzere üç başlık altında sınıflandırılır [1].…”

Section: Introductionunclassified

Isil Enerji̇ Depolama Malzemesi̇ Olarak Kompozi̇t Faz Deği̇şti̇ren Maddeleri̇n Hazirlanmasi Ve Karakteri̇zasyonu

Mert

Bayram

2020

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Faz değiştiren maddeler (FDMler), ısıl enerjinin gizli ısı olarak depolanabilmesine olanak tanıyan ve yüksek gizli ısı depolama kapasiteleriyle oldukça geniş bir yelpazedeki ısıl enerji depolama uygulamalarında kullanılabilen malzemelerdir. FDMlerin organik sınıfında yer alan parafinler, yüksek gizli ısı depolama kapasiteleri, ısıl ve kimyasal kararlılıklarıyla ön plana çıkmaktadır. Bununla beraber bu malzemelerin ısıl enerji depolamada doğrudan kullanımı, sıvı faz halinde sızdırma potansiyeli nedeniyle uygun değildir. Dolayısıyla bu malzemelere uygulanacak makro/mikro ölçekli kapsülasyon işlemi uygun çözüm yollarından biridir. Ayrıca bu malzemelerin yapısal, kimyasal ve ısıl kararlılıklarının arttırılması amacıyla çeşitli inorganik gözenekli dolguların kapsülasyon işlemi esnasında destek malzeme olarak ilavesi de mümkün olmaktadır. Bu çalışmada, FDMlerden biri olan n-oktadekan (OD) ağırlıkça %15-35 oktadesilamin ve %0,5-5 aminopropiltrietoksisilan ile yüzeyi modifiye edilmiş montmorillonit kili varlığında faz inversiyon emülsifikasyonu yöntemiyle mikro boyutta kapsüllenmiştir. Hazırlanan mikrokapsüllerin faz değişim sıcaklık aralığı, ısıl enerji depolama kapasiteleri ve ısıl kararlılıklarıyla düşük sıcaklıktaki (20-35°C) gizli ısı depolama uygulamalarında kullanılabilme potansiyelleri araştırılmıştır.

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Review of solar water heaters incorporating solid-liquid organic phase change materials as thermal storage

Cited by 140 publications

References 95 publications

Improvement of Phase Change Materials (PCM) Used for Solar Process Heat Applications

Improvement of Phase Change Materials (PCM) Used for Solar Process Heat Applications

Phase change materials for building construction: An overview of nano-/micro-encapsulation

Isil Enerji̇ Depolama Malzemesi̇ Olarak Kompozi̇t Faz Deği̇şti̇ren Maddeleri̇n Hazirlanmasi Ve Karakteri̇zasyonu

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