Thermal performance enhancement of flat-plate solar collectors by means of three different nanofluids

Ziyadanoğulları, Neşe Budak; Yücel, Halit Lutfi; Yıldız, Cengiz

doi:10.1016/j.tsep.2018.07.005

Cited by 76 publications

(23 citation statements)

References 23 publications

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“…It is worth mentioning that there are several studies reporting improvements in solar systems driven by FPSCs based NFs solar systems such as solar stills, solar heating and refrigeration, solar domestic hot water, and power generation. In this regard, Table 3 [78][79][80][81][82][83][84][85] summarizes several systems and improvements.…”

Section: Application Of Nfs To Enhance Performance Of Fpscsmentioning

confidence: 99%

Single and Hybrid Nanofluids to Enhance Performance of Flat Plate Solar Collectors: Application and Obstacles

Al-Yasiri

Szabó

Arıcı

2020

Period. Polytech. Mech. Eng.

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Solar energy represents the best alternative for traditional energy sources used in many thermal energy systems. Among solar thermal systems, Flat Plate Solar Collectors (FPSCs) are the most utilized type implemented in low and medium-level thermal domestic applications. Recently, the usage of nanofluids (NFs) to enhance FPSCs is one of the newest technologies that has drawn the attention of researchers to improve the overall thermal efficiency of solar systems. This paper briefly reviews the recent studies carried on thermal performance enhancement of FPSCs by implementing NFs (single and hybrid NFs) considering the main influential parameters such as particle concentration, particle size, and collector area. Finally, the main obstacles reported by the researchers such as the instability, viscosity, concentration limit, corrosion effect and others are identified, which is believed to be useful for interested newcomers in this research area. Based on the studies investigated in this paper, NFs, even under low concentrations, can remarkably improve the energetic and exergetic efficiency of FPSCs.

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Section: Application Of Nfs To Enhance Performance Of Fpscsmentioning

confidence: 99%

Single and Hybrid Nanofluids to Enhance Performance of Flat Plate Solar Collectors: Application and Obstacles

Al-Yasiri

Szabó

Arıcı

2020

Period. Polytech. Mech. Eng.

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“…Kolektörün soğurucu plakasının malzemesi, kalınlığı ve alanı gibi parametrelerin onun performansı üzerindeki etkisi oldukça fazladır. Ayrıca yapıldığı malzemenin ısı geçirgenliğinin düşük olması onun performansını etkileyen etmenlerdendir [4]. Düzlemsel kolektörün enerji veriminin yükselmesi onun daha yüksek sıcaklıklarda bir akışkan elde edilmesinin sağlar.…”

Section: Introductionunclassified

Comparison of heat efficiency of flat-plate and vacuum tube collectors integrated with Organic Rankine Cycle in Adana climate conditions

Atız¹,

Karakılçık²

2020

Pamukkale J Eng Sci

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Bu çalışmada, düzlemsel güneş kolektörleri (DGK'lar) ile vakum tüplü güneş kolektörlerinin (VTGK'ler) termodinamik performansı, elektrik ve hidrojen üretimi numerik olarak karşılaştırıldı. Her iki sistem analizi Adana iklim koşullarında bir yıl boyunca yapıldı. DGK'lar ve VTGK'lar güneş enerjisinden ısı enerjisi üretebilen güneş enerjisi teknolojileridir. Bunlar çeşitli yerlerde sıcak su ihtiyacı veya ısınma ihtiyacını karşılamak için kullanılır. Ancak, günümüzde elektriğin birçok yerde kullanılmasından dolayı, her geçen gün elektrik üretimi daha kıymetli hale gelmektedir. Böylece, insanlık elektriği çeşitli kaynaklardan üretmenin yollarını aramaktadır. Organik Rankine Çevrimi (ORÇ) düşük ve yüksek sıcaklıklardaki kaynaklardan elektrik üretebilen çok önemli makinalardır. Bu sayede, DGK'larda ve VTGK'larda üretilen ısı enerjisi bir pompa yardımıyla ORÇ' ye aktarılarak elektrik üretilmiştir. ORÇ' de üretilen elektrik bir elektroliz sistemine aktarıldı ve burada suyun elektrolizi ile hidrojen üretilmiştir. Sistemin termodinamik analizi Mühendislik Eşitlik Çözümleyici (EES) benzetim programı ile yapılmıştır. Sonuçlara göre, güneş enerjisi ve ortam sıcaklığı artışıyla birlikte DGK ve VTGK' den oluşan sistemin termal verimi ve dolayısıyla da ORÇ'nin güç üretim verimi artmıştır. Bu artışlar sayesinde, hidrojen üretimi de önemli ölçüde artmıştır. Bu nedenle, Temmuz ayında VTGK'lar ve DGK'ların ısıl verimleri sırasıyla maksimum %6.25 ve %5.46 olarak bulundu.In this study, the thermodynamic performance of solar collectors (FPSCs) and vacuum tube solar collectors (VTSCs), electricity and hydrogen production were numerically compared. Both systems were analyzed for one year in Adana climate conditions. FPSCs and VTSCs are solar energy technologies that can produce heat energy from solar energy. They are used in various places to meet the need for hot water or warming. However, today electricity is used more in many places, electricity generation is becoming more valuable every day. Thus, humanity seeks to produce electricity from various sources. Organic Rankine Cycle (ORC) is a very important machine that can produce electricity from sources at low and high temperatures. In this way, the heat energy produced in the FPSCs and VTSCs was transferred to the ORC by means of a pump and electricity was generated. The electricity produced in the ORC was transferred to an electrolysis system where hydrogen was produced by electrolysis of water. The thermodynamic analysis of the system was carried out by the Engineering Equation Analyzer (EES) simulation program. According to the results, with the increase of the solar energy and ambient temperature, the thermal efficiency of the system consisting of the FPSCs and VTSCs and thus the power production efficiency of ORC increased. Thanks to these increases, hydrogen production has also increased significantly. Thus, in July, the maximum thermal efficiency of VTSCs and FPSCs was found as 6.25% and 5.46%, respectively.Anahtar kelimeler: Güneş enerjisi, Düzlemsel ve vakum tüplü güneş kolek...

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“…In addition, the efficiency of the solar collector was further improved with augmentation of MgO based nanofluid concentration. In another study, Ziyadanogullari et al [27] experimentally assessed the influence of the presence of various nanoparticles on the TP of a flat plate collector. Nanoparticles including alumina, copper oxide and Titania were dispersed in water at volumetric concentrations of 0.2-0.8% and the flow rate of the carrying fluid was set to 250 L/h for each nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Potential of Solar Collectors for Clean Thermal Energy Production in Smart Cities using Nanofluids: Experimental Assessment and Efficiency Improvement

et al. 2019

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In this article, an experimental study was performed to assess the potential thermal application of a new nanofluid comprising carbon nanoparticles dispersed in acetone inside an evacuated tube solar thermal collector. The effect of various parameters including the circulating volumetric flow of the collector, mass fraction of the nanoparticles, the solar irradiance, the tilt angle and the filling ratio values of the heat pipes on the thermal performance of the solar collector was investigated. It was found that with an increase in the flow rate of the working fluid within the system, the thermal efficiency of the system was improved. Additionally, the highest thermal performance and the highest temperature difference between the inlet and the outlet ports of the collector were achieved for the nanofluid at wt. % = 0.1. The best tilt angle and the filling ratio values of the collector were 30° and 60% and the maximum thermal efficiency of the collector was 91% for a nanofluid at wt. % = 0.1 and flow rate of 3 L/min.

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Thermal performance enhancement of flat-plate solar collectors by means of three different nanofluids

Cited by 76 publications

References 23 publications

Single and Hybrid Nanofluids to Enhance Performance of Flat Plate Solar Collectors: Application and Obstacles

Single and Hybrid Nanofluids to Enhance Performance of Flat Plate Solar Collectors: Application and Obstacles

Comparison of heat efficiency of flat-plate and vacuum tube collectors integrated with Organic Rankine Cycle in Adana climate conditions

Potential of Solar Collectors for Clean Thermal Energy Production in Smart Cities using Nanofluids: Experimental Assessment and Efficiency Improvement

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