Testing of a novel convex-type solar absorber drying chamber in dehumidification process of municipal sewage sludge

Tuncer, Azim Doğuş; Sözen, Adnan; Afshari, Faraz; Khanları, Ataollah; Şirin, Ceylin; Güngör, Afşin

doi:10.1016/j.jclepro.2020.122862

Cited by 59 publications

(12 citation statements)

References 49 publications

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“…The obtained uncertainty metrics for temperature, water mass, and solar radiation were ±0.55 • C, ±0.58 g, and ±16.34 W/m 2 , respectively. The obtained uncertainties are in line with those obtained similar studies on SDSs and other solar-thermal systems [70][71][72].…”

Section: Energy-exergy Analysissupporting

confidence: 91%

Experimental Performance Analysis of a Solar Desalination System Modified with Natural Dolomite Powder Integrated Latent Heat Thermal Storage Unit

2022

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Solar desalination systems are effective and sustainable applications that are utilized to obtain potable water from saline or contaminated water. In this research, three solar desalination systems, including a conventional system, a phase change material (PCM)-based thermal energy storage unit (TESU), and a natural dolomite powder integrated PCM-based TESU, were structured and experimentally investigated. The developed solar desalination systems were analyzed simultaneously and the findings were discussed in detail. According to the empirically obtained outcomes, utilizing PCM-based TESUs and dolomite-powder-embedded PCM-based TESUs increased daily cumulative productivity by 10.15% and 17.70%, respectively, in comparison to the conventional distiller. Employing dolomite powder increased the energy and exergy efficiencies of the conventional distiller from 15.91% to 18.28% and from 1.26% to 1.78%, respectively. Moreover, environmental metrics such as global warming potential and the sustainability index of the developed solar desalination systems were analyzed within the scope of this work.

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Section: Energy-exergy Analysissupporting

confidence: 91%

Experimental Performance Analysis of a Solar Desalination System Modified with Natural Dolomite Powder Integrated Latent Heat Thermal Storage Unit

2022

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“…Ekserjetik verimlilikte ηex=%23 artış elde etmişledir [29]. Bunlara ek olarak literatürde yer alan birçok çalışmada yutucu yüzeye sabit ısı akısı sınır şartı ile analiz çalışmaları gerçekleştirilmiştir [30,31]. Alıç vd.…”

Section: Theory and Methodsunclassified

Havalı güneş kolektörünün farklı akış debilerinde ısıl verim değerlerinin sayısal araştırılması

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2022

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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Yenilenebilir enerji kaynaklarını kullanan teknolojilerinin son dönemde hızla gelişmesi, sanayinin artan enerji ve güç ihtiyacının karşılanmasında yeni bir sürece girilmesine sebep olmuştur. Bu çalışmada, endüstride daha çok gıda kurutmada kullanılan güneş enerjili hava ısıtıcısının termal ve akış özellikleri araştırılmıştır. Havalı güneş kolektörünün (HGK) iki farklı uzunluk 1400 mm ve 1820 mm için optimum verim araştırılmıştır. Her iki kolektörün enerji ve ekserji verim değerleri karşılaştırılmıştır. Çalışmada sayısal analiz programı olarak ANSYS FLUENT 18.1 kullanılmıştır. Analizler üç farklı hava debisinde sırasıyla 0,038-0,054-0,070 kg/s ve 3 boyut (3B) olarak gerçekleştirilmiştir. Hava kolektörünün yutucu plakası trapezdir ve zemin ile açısı 42º dir. Analiz sonucu elde edilen basınç düşüşünden kolektörün sürtünme katsayıları hesaplanmıştır. Sıcaklık dağılımı, hız dağılımı ve basınç dağılımı değişimleri günün farklı saatleri için gösterilmiştir. En yüksek termal verim saat 13.00’da %85 ile 0,070 kg/s hava debisinde gerçekleşmiştir. Yüksek debilere çıktıkça kolektörün termal verimi artmıştır. Kolektörden geçen hava debisinin artışı çıkış sıcaklığını düşürmesine rağmen faydalı enerji miktarını artırmıştır. Bu çalışma farklı kütlesel debi değerlerinin ve yutucu plaka boyutlarının HGK’nın ısıl verimi üzerinde önemli bir etkiye sahip olduğunu açık bir şekilde göstermiştir.

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“…Lignin is a solid byproduct of the bioethanol production and is impregnated in the space between the porous of wastewater sludge to produce hybrid fuels. According to Park et al (2019) the sludge must go through a drying process for 24h at 105 o C to remove enough moisture to make the lignin impregnation viable.…”

Section: Moisture Reduction Of Domestic Wastewater Sludgementioning

confidence: 99%

“…Solar heater can be used to heat the air supplied to the drying process of wastewater sludge. Moreover, other processes can be combined to provide pre-heated air (Tuncer et al, 2020). Mathioudakis et al (2013) develop a system where solar concentrators are used to accelerate the evaporation rate of water taking advantage of the artificial greenhouse effect promoting nonequilibrium condition between the vapor pressures which is controlled by the inlet air.…”

Section: Alternative Drying Processesmentioning

confidence: 99%

Alternatives of Domestic Wastewater Sludge Drying Processes for Energy Recovery : A Review

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et al. 2021

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As communities grow, cities need to increase their capacity to collect and treat domestic wastewater. The need of larger domestic wastewater treatment plants and proper disposal of its solid waste has attracted the scientific community to research about new technologies that will use those systems and waste as a way to generate energy. The moisture content of a fuel effects the combustion products and the energy released by the reaction. Therefore, in order to make biomass to be a viable fuel option, the technological and scientific challenges of the drying process of wastewater sludge must be faced and overcome so the lowest moisture content level is achieved. Conventional drying processes as for example, direct and indirect thermal drying, are commonly used. However, other processes using renewable energy as for example solar drying are also being studied by the scientist around the world. Moisture content, physical-chemical properties as for example, heating values, composition, ash fusibility are all relevant properties taken into consideration when choosing a fuel for a specific application. The herein review is intended to present some existing domestic wastewater drying processes, alternative ways of improving the efficiency of those processes.

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Testing of a novel convex-type solar absorber drying chamber in dehumidification process of municipal sewage sludge

Cited by 59 publications

References 49 publications

Experimental Performance Analysis of a Solar Desalination System Modified with Natural Dolomite Powder Integrated Latent Heat Thermal Storage Unit

Experimental Performance Analysis of a Solar Desalination System Modified with Natural Dolomite Powder Integrated Latent Heat Thermal Storage Unit

Havalı güneş kolektörünün farklı akış debilerinde ısıl verim değerlerinin sayısal araştırılması

Alternatives of Domestic Wastewater Sludge Drying Processes for Energy Recovery : A Review

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