Energy technology最新文献

{"title":"TransHyDE - Developing Solutions for Designing Ideal Hydrogen Infrastructures to Maximise Efficiency and Resilience","authors":"Fenja Bleich","doi":"10.1002/ente.202401543","DOIUrl":"https://doi.org/10.1002/ente.202401543","url":null,"abstract":"<p>Dear readers,</p><p>With the adoption of the National Hydrogen Strategy (NWS) in June 2020 and its update in July 2023, the German government strengthens the establishment of a hydrogen economy in Germany to achieve the Paris climate goals and to build an energy system based on renewable energies.</p><p>To meet the required demand international imports will complement the national production. Supra-regional storage and transport infrastructures for green hydrogen are needed to ensure efficient temporal and spatial distribution.</p><p>This is where TransHyDE comes in as one of three hydrogen flagship projects funded by the German Federal Ministry of Education and Research (BMBF). The project is coordinated by Prof. Robert Schlögl (Max Planck Society), Prof. Mario Ragwitz (Fraunhofer Institute for Energy Infrastructures and Geothermal Energy IEG) and Jimmie M. Langham (cruh21 GmbH - Part of Drees &amp; Sommer).</p><p>Over 100 partners and associated partners are working to resolve technological and economic barriers, analyse gaps in technical codes and regulatory frameworks, and contribute to closing them. This is implemented by ten TransHyDE projects for the energy vectors gaseous and liquid hydrogen as well as liquid organic hydrogen carriers (LOHC) and ammonia. The results are continuously communicated via target-specific measures, e. g. whitepapers, scientific papers and events, to the scientific community, political decision-makers and the general public.</p><p>This special issue of the scientific journal Energy Technology mirrors the comprehensive thematical set-up of the TransHyDE projects by illustrating their aspects of the transport and storage infrastructure of hydrogen and its derivates. The perspectives of the featured articles and reviews are remarkably diverse and span the full range from higher level topics like transitioning paths towards climate neutral gas grids to providing answers to specific, in-depth technological questions that need to be solved to make the models become reality. The technology-open approach of TransHyDE is clearly visible in this special issue as it is not limited to one specific hydrogen transport option or infrastructural component, where for example hydrogen storage with LOHC technology, as well as underground storage in sandstone formations and the direct usage of ammonia in combustion engines are examined next to one another. Studies on public acceptance and societal risk perception add to the technological perspectives and allow putting them into action.</p><p>With this broad range of topics, the TransHyDE special issue invites readers to take a holistic approach to future transport and storage infrastructure of hydrogen and its derivates in Germany. We firmly believe that only by putting all our knowledge together and remaining technology-open we will be able to find efficient solutions to sensibly conclude the ongoing energy transition.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 2","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ente.202401543","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Guidance for the Sustainable and Long-term Use of LNG Terminal Sites as Logistics Hubs for Hydrogen and Its Derivatives","authors":"Kristin Kschammer","doi":"10.1002/ente.202300969","DOIUrl":"https://doi.org/10.1002/ente.202300969","url":null,"abstract":"&lt;p&gt;On 1 June 2022, the German Act to Accelerate the Use of Liquefied Natural Gas (LNG Act) came into force. According to this law, a permit for the continued operation of LNG facilities after 31 December 2043 can only be granted if the facilities are operated with climate-neutral hydrogen and its derivatives. In this context, the research and development requirements for the conversion of LNG terminals to hydrogen and its derivatives were formulated. These requirements will be investigated in the new TransHyDE project LNG2HyDE which started on 1 June 2023. Central questions of the project are: What are the technological, regulatory and normative challenges for the conversion of LNG terminals to green hydrogen from renewable energy sources and its derivatives? What are the research and development needs? To what extent can and should the conversion of LNG terminals to hydrogen and its derivatives take place gradually? Is mixed operation feasible? What time and capacity requirements can be estimated for the conversion of terminals from LNG to hydrogen and hydrogen derivatives in the light of the global hydrogen value chains that are being set up?&lt;/p&gt;&lt;p&gt;The aim of the project is to develop, within 18 months, a scientifically sound, sustainable data base and recommendations as a basis for decision-making on the viable and long-term use of LNG terminal sites as logistical hubs for hydrogen and its derivatives. In order to achieve this goal, a technology-open investigation is to be carried out, so that in addition to liquid hydrogen and ammonia, the hydrogen carriers and hydrogen derivatives methanol, liquid organic hydrogen carriers, synthetic natural gas (SNG) and dimethyl ether are to be investigated. All of these promising candidates will be investigated in parallel.&lt;/p&gt;&lt;p&gt;The new TransHyDE project will define H&lt;sub&gt;2&lt;/sub&gt; transport vectors in the context of LNG terminals and provide a technological inventory of terminals for the import of SNG, LNG, LH&lt;sub&gt;2&lt;/sub&gt;, NH&lt;sub&gt;3&lt;/sub&gt;, LOHC, MeOH and DME with the aim of identifying the main infrastructure components. Another important part of the project is the development of concepts for the further development and use of LNG terminals for other H&lt;sub&gt;2&lt;/sub&gt; transport vectors. The terminal concepts include all process steps and infrastructures from ship docking, storage and conversion to the injection of the liquefied gas into the H&lt;sub&gt;2&lt;/sub&gt; backbone network as well as filling facilities for domestic road, rail and ship transport. The starting point is the LNG terminal infrastructures currently being planned and built. In particular, it will be examined how existing facilities, infrastructure and components of the LNG terminals can be further used and which process steps and facilities will have to be replaced or newly constructed for the alternative utilization paths.&lt;/p&gt;&lt;p&gt;The project will also include an analysis of the materials used in the terminal components regarding their compatibility wit","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 2","pages":""},"PeriodicalIF":3.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ente.202300969","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing Supercapacitor Performance of NiCoMn‐Layered Double Hydroxide with Ag–Citrate/Polyaniline Nanocomposites","authors":"Ammar Makda, Mohsin Ali Marwat, Muhammad Hamza Mahmood, Abdullah Naeem, Syed Muhammad Abdullah, Muhammad Humayun, Muhammad Ramzan Abdul Karim, Mohamed Bououdina, Muhammad Zubair Khan, Muhammad Bilal Hanif","doi":"10.1002/ente.202401730","DOIUrl":"https://doi.org/10.1002/ente.202401730","url":null,"abstract":"Layered double hydroxide (LDH) has a layered structure, which makes it a strong candidate for supercapacitors (SC) due to its high surface area. However, they suffer from low conductivity due to insufficient charge transfer across their layers. This research aims to overcome this obstacle by introducing conductive channels among the layers by the addition of Ag–citrate and polyaniline (PANI). Consequently, five electrodes (S<jats:sub>1–5</jats:sub>) were made from NiCoMn LDH (referred to as LDH henceforth) and 2:1 Ag–citrate and PANI composite (Ag/PANI) in different ratios and made into electrodes. Electrochemical analysis revealed successful improvement in the performance of LDH as the fraction of Ag/PANI increased until it equaled Ag/PANI where the highest specific capacitance of 617 F g<jats:sup>−1</jats:sup> was obtained, which is 12% greater than the value for solely LDH electrode (550 F g<jats:sup>−1</jats:sup>). A device was fabricated with the best electrode (S<jats:sub>3</jats:sub>) and activated carbon electrode, which demonstrated energy densities and power densities of 41 WhKg<jats:sup>−1</jats:sup> and 412.5 W Kg<jats:sup>−1</jats:sup> and 14 WhKg<jats:sup>−1</jats:sup>and 8250 W Kg<jats:sup>−1</jats:sup> at 0.5 and 10 A g<jats:sup>−1</jats:sup> current densities, respectively. It also exhibited a capacitive retention of about 75% at 3000 galvanostatic charge–discharge cycles. These results encourage the use in of NiCoMn LDH, in a 1:1 ratio with Ag/PANI in SCs due to its remarkable performance.","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"51 1","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prediction Study of Solid Oxide Fuel Cell Performance Degradation Using Data-Driven Approaches","authors":"Haibo Huo,&nbsp;Yu Chen,&nbsp;Gifty Pamela Afun,&nbsp;Xinghong Kuang,&nbsp;Jingxiang Xu,&nbsp;Xi Li","doi":"10.1002/ente.202400990","DOIUrl":"https://doi.org/10.1002/ente.202400990","url":null,"abstract":"<p>Performance degradation in solid oxide fuel cells (SOFCs) leads to shorter service life and unexpected downtime. To reduce economic losses and accelerate commercialization, accurately predicting the degradation is conducted in this study. First, a comprehensive analysis of performance degradation through experiments on a real SOFC system is investigated. Then, three dada-driven robust models, that is, vector autoregressive moving average (VARMA), radial basis function neural network (RBFNN), and neural basis expansion analysis for time series (N-BEATS) models are proposed to predict the SOFC's performance degradation. Herein, the top 60–90% of the experimental datasets are used for training and the bottom 40–10% for testing. After training, the prediction performance testing of these 3 models is compared with that of the bi-long short-term memory networks (bi-LSTM) and bi-gated recurrent units (bi-GRU) models. Simulation results show that both the VARMA and N-BEATS models are superior to the bi-LSTM and bi-GRU models in predicting the performance degradation of the SOFC. While the test performance of the RBFNN model is worst, especially under the top 60% training datasets condition. These indicate it is feasible to respectively establish the VARMA model and the N-BEATS model for predicting the SOFC's performance degradation.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Performance Analysis of Cement Plant Waste-Heat Recovery for Power Generation Based on Partial Evaporating Cycle with Ejector","authors":"Ed Joshua Manalac,&nbsp;Menandro Serrano Berana,&nbsp;Sung Chul Kim","doi":"10.1002/ente.202401419","DOIUrl":"https://doi.org/10.1002/ente.202401419","url":null,"abstract":"<p>In the cement industry, much waste heat is released into the environment. The organic Rankine cycle is widely utilized to harness waste heat for power generation. However, significant energy is lost in the heat recovery process due to the finite temperature difference between the heat source and working fluid, resulting in low power output andefficiency. To enhance the heat recovery from the cement flue gas and increase power output and overall efficiency, a novel partial evaporating cycle with ejector is proposed and investigated in this study. Pinch point analysis is performed to characterize the heat recovery process in the evaporator. The effects of the evaporating temperature, outlet quality of the evaporator, and exit pressure of the primary expander on system performance are also investigated. Results show that partially evaporating the fluid improves heat matching and reduces the irreversibilities in the evaporator by up to 18.1% when the outlet quality of the fluid is 0.33. Maximum net power of 803.15 kW can be generated with an evaporating temperature of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>130</mn>\u0000 <mo> °</mo>\u0000 <mi>C</mi>\u0000 </mrow>\u0000 <annotation>$130 circ text{C}$</annotation>\u0000 </semantics></math>, outlet quality of 0.33, and expander exit pressure of 1054.9 kPa. Additionally, the inclusion of the ejector increases the net power produced by up to 76.07 kW.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AFe2O4 (A=Cu, Ni, Co, Mg, Ce, Mn) Catalysts for Hydrogen-Rich Syngas Production from Corn Straw Pyrolysis-Catalytic Steam Reforming","authors":"Hengtao Guo,&nbsp;Xuetao Wang,&nbsp;Haojie Li,&nbsp;Mengjie Liu,&nbsp;Lili Xing,&nbsp;Haoshan Zhai","doi":"10.1002/ente.202401302","DOIUrl":"https://doi.org/10.1002/ente.202401302","url":null,"abstract":"<p>CuFe₂O₄, an iron-based spinel catalyst, along with NiFe₂O₄, CoFe₂O₄, MgFe₂O₄, CeFe₂O₄, and MnFe₂O₄ are prepared using the sol–gel method. Different modified transition metals have been investigated to determine the influence on hydrogen production in a fixed-bed reactor. The results indicated that all the prepared catalysts exhibit a spinel structure. At a reaction temperature of 700 °C, with a water–carbon molar ratio of S/C = 1.5 and a biomass-to-catalyst mass ratio of 1:1, the performance ranking of the AFe₂O₄ spinel catalysts is as follows: CeFe₂O₄ &gt; CuFe₂O₄ &gt; MnFe₂O₄ &gt; NiFe₂O₄ &gt; CoFe₂O₄ &gt; MgFe₂O₄ &gt; no catalyst. CeFe₂O₄ and CuFe₂O₄ catalysts demonstrate superior performance, with hydrogen volume fractions of 42.26% and 41.63% respectively. The AFe₂O₄ catalyst exhibits effective catalytic activity in the production of hydrogen from corn straw using water vapor, with the synergistic effect of A metal and Fe enhancing the catalytic activity of AFe₂O₄.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Navigating the Frontier Role of Electrolyte Interfaces in Dye-Sensitized Solar Cell Technology","authors":"Santhosh Kamaraj,&nbsp;Ganesan Shanmugam,&nbsp;Balamurugan Selvaraj","doi":"10.1002/ente.202401345","DOIUrl":"https://doi.org/10.1002/ente.202401345","url":null,"abstract":"<p>Recent advances in solar cell technology have been motivated by new materials and inventive engineering techniques. Dye-sensitized solar cells (DSSCs) are becoming more widely recognized as a possible alternative for sustainable energy. Optimizing electrolytes is one of the most important variables impacting their effectiveness and durability. The electrolyte interface is critical to optimize charge separation, ion transport, and diffusion ensuring device stability and efficiency. The present investigation focuses on enhancing interface stability and investigating innovative electrolyte compositions to improve DSSC performance for sustainability in solar energy applications. Despite progress, obstacles remain in presenting core principles and research approaches in DSSC technology. Continued research is required to overcome these limitations and fully realize the potential of DSSCs in sustainable energy solutions.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual Metal Sites Coengineered Graphitic Carbon Nitride as Green Electrocatalyst for Highly Selective Overall Water Splitting—A Sustainable Approach","authors":"Satya Lakshmi Pasarakonda,&nbsp;Srikanth Ponnada,&nbsp;Maryam Sadat Kiai,&nbsp;Velu Duraisamy,&nbsp;Hima Bindu G,&nbsp;Annapurna Nowduri,&nbsp;Sakkarapalayam Murugesan Senthil Kumar,&nbsp;Rakesh K Sharma","doi":"10.1002/ente.202401577","DOIUrl":"https://doi.org/10.1002/ente.202401577","url":null,"abstract":"<p>The development of efficient, low-cost, non-noble metal-oxide-based nanohybrid materials for overall water splitting is a critical strategy for enhancing clean energy use and addressing environmental issues. In this study, an interfacial engineering strategy for the development of bimetallic Co–Ni nanoparticles on graphitic carbon nitride (g-C₃N₄) using ultrasonication followed by coprecipitation is conveyed. These nanoparticles demonstrate high efficacy as bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline conditions. Co–Ni nanoparticles on graphitic carbon nitride demonstrate an increased surface area via ultrasonication and subsequent coprecipitation. The g-C₃N₄ combined with Co–Ni nanoparticles leads to the development of bifunctional catalysts that exhibit significant efficiency in both HER and OER, and their interfacial properties are investigated for the first time. The chemical composition and morphology of g-C₃N₄ integrated with Co–Ni nanoparticles significantly influence the modulation of redox-active sites and the facilitation of electron transfer, resulting in improved splitting efficiency. The interactions between the Co–Ni bimetal and g-C₃N₄ demonstrate exceptional electrochemical performance for water splitting. Consequently, the 20% 20–Co–Ni–graphitic carbon nitride electrode demonstrated superior HER performance, comparable to the other electrodes. In the results, it is indicated that an increased molar ratio of Co and Ni incorporated in graphitic carbon nitride significantly improves HER performance.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the Impact of Hydrogen Bonding on Silicon Nitride (SiNx) Film","authors":"Hasnain Yousuf,&nbsp;Alamgeer Khan,&nbsp;Muhammad Quddamah Khokhar,&nbsp;Rafi ur Rahman,&nbsp;Polgampola Chamani Madara,&nbsp;Jaljalalul Abedin Jony,&nbsp;Muhammad Aleem Zahid,&nbsp;Youngkuk Kim,&nbsp;Junsin Yi","doi":"10.1002/ente.202400761","DOIUrl":"https://doi.org/10.1002/ente.202400761","url":null,"abstract":"<p>The deposition of amorphous hydrogenated silicon nitride (a-SiN_<i>x</i>:H) via plasma-enhanced chemical vapor deposition is critical for optimizing the performance of crystalline silicon (c-Si) solar cells. This study investigates the impact of varying gas ratios (GR = NH₃/SiH₄) on the optical and physical properties of deposited SiN_<i>x</i> films. Results show that the refractive index (RI) ranges from 1.8 to 2.3 with changing gas compositions. Fourier transform infrared Spectroscopy reveals shifts in [SiN<span></span>H] and [Si<span></span>H] stretching modes, indicating changes in hydrogen passivation and nitrogen incorporation. Hydrogen bonding densities of [Si<span></span>H] and [SiN<span></span>H] correlate positively with the RI. For example, the hydrogen bonding density [N_H] ranges from 4.53 × 10²³ to 6.32 × 10²³ cm⁻³ for [SiN<span></span>H] bonds while [Si-H] varies from 6.93 × 10²³ to 1.06 × 10²⁴ cm⁻³. Secondary ion mass spectrometry (SIMS) analysis shows stable hydrogen intensity, contrasting with a decrease in nitrogen<span></span>hydrogen bonds. These findings highlight the key role of hydrogen bonding in determining SiN_<i>x</i> film properties, with significant implications for semiconductor and photovoltaic applications.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143118225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Experimental Investigation on Synthesis, Characterization, and Photothermal Conversion Efficiency of Stable Aqueous Nanofluids Containing Multiwalled Carbon Nanotubes for Direct Absorption Solar Collectors","authors":"John George,&nbsp;Meledath Sadanandan Sreekanth","doi":"10.1002/ente.202400784","DOIUrl":"https://doi.org/10.1002/ente.202400784","url":null,"abstract":"<p>The nanofluids are the potential substitute in solar collectors as working fluids for better photothermal conversion efficiency. The present investigation focuses on the development of aqueous-based nanofluids comprising multiwalled carbon nanotubes (MWCNTs) with and without surfactants to enhance the capacity of photothermal conversion in direct absorption solar collectors. To improve the stability of the nanofluid, the gum Arabic (GA) and polyvinyl alcohol (PVA) are used as the surfactants. The stable nanofluid was characterized using UV-visible spectroscopy, zeta potential, fourier-transform infrared spectroscopy, field emission scanning electron microscopy, and energy dispersive X-ray spectroscopy (EDS) analysis. The results indicated that the thermal conductivity was enhanced by 94.57% and 91.19% for the MWCNT/GA/deionized (DI) water and MWCNTs/PVA/DI water based nanofluids in presence of surfactants at 90 °C and 0.02 wt%. The presence of surfactant in MWCNTs/DI water nanofluids exhibit excellent stability and enhanced MWCNTs dispersion. In the photothermal response analysis, the highest temperature of 62.8 °C, which is 16 °C higher than the base fluid, is obtained from 0.02wt% MWCNT/GA nanofluid. The highest efficiency of 27.94% is recorded when 0.02wt% MWCNT/GA nanofluid is used, which shows 71.24% enhancement as compared to the DI water after exposure of 30 minutes under solar irradiation. The use of MWCNTs/GA nanofluid as light-absorbing working fluids in solar collectors is encouraged in the present investigation.</p>","PeriodicalId":11573,"journal":{"name":"Energy technology","volume":"13 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}