Pub Date : 2024-02-16DOI: 10.1007/s40243-023-00250-7
Akhil M. Anand, Aruna Raj, Jishad A. Salam, R. Adithya Nath, R. Jayakrishnan
Self-assembly is the most promising low-cost and high-throughput methodology for nanofabrication. This paper reports the optimization of a self-assembly process at room temperature for the growth of copper oxide (CuO) based nanostructures over a copper substrate using aqueous potassium hydroxide (KOH) solution as the oxidizing agent. The monoclinic phase of CuO nanostructures grown over the copper substrate was confirmed from the X-ray diffraction (XRD) and micro-Raman analysis. The overall chemical composition of nanostructures was confirmed to be that of CuO from its oxidation state using X-ray photoelectron spectroscopy (XPS). Photodetectors were engineered with the structure Cu/CuO/Ag. The photodetectors exhibited a response to both ultraviolet and visible light illumination. The optimized Cu/CuO/Ag structure exhibits a responsivity of ~ 1.65 µA/W, with an ON:OFF ratio of ~ 69 under a bias voltage of 0.01 V. The temporal dependence of photo-response for the optimized photodetector displayed the persistent nature of photoconduction indicating a delay in charge carrier recombination which could potentially be exploited for photovoltaic applications.
自组装是最有前途的低成本、高通量纳米制造方法。本文报告了使用氢氧化钾(KOH)水溶液作为氧化剂,在室温下优化自组装工艺,在铜基底上生长基于氧化铜(CuO)的纳米结构。通过 X 射线衍射 (XRD) 和微拉曼分析,确认了在铜基底上生长的 CuO 纳米结构的单斜相。利用 X 射线光电子能谱(XPS)从氧化态确认了纳米结构的整体化学成分为氧化铜。光电探测器的结构为 Cu/CuO/Ag。光电探测器对紫外线和可见光照明均有响应。优化后的 Cu/CuO/Ag 结构在 0.01 V 的偏置电压下的响应率约为 1.65 µA/W,导通与关断比约为 69。
{"title":"Photoconductivity in self-assembled CuO thin films","authors":"Akhil M. Anand, Aruna Raj, Jishad A. Salam, R. Adithya Nath, R. Jayakrishnan","doi":"10.1007/s40243-023-00250-7","DOIUrl":"https://doi.org/10.1007/s40243-023-00250-7","url":null,"abstract":"<p>Self-assembly is the most promising low-cost and high-throughput methodology for nanofabrication. This paper reports the optimization of a self-assembly process at room temperature for the growth of copper oxide (CuO) based nanostructures over a copper substrate using aqueous potassium hydroxide (KOH) solution as the oxidizing agent. The monoclinic phase of CuO nanostructures grown over the copper substrate was confirmed from the X-ray diffraction (XRD) and micro-Raman analysis. The overall chemical composition of nanostructures was confirmed to be that of CuO from its oxidation state using X-ray photoelectron spectroscopy (XPS). Photodetectors were engineered with the structure Cu/CuO/Ag. The photodetectors exhibited a response to both ultraviolet and visible light illumination. The optimized Cu/CuO/Ag structure exhibits a responsivity of ~ 1.65 µA/W, with an ON:OFF ratio of ~ 69 under a bias voltage of 0.01 V. The temporal dependence of photo-response for the optimized photodetector displayed the persistent nature of photoconduction indicating a delay in charge carrier recombination which could potentially be exploited for photovoltaic applications.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139765063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-16DOI: 10.1007/s40243-024-00255-w
Abstract
Perovskite solar cells (PSCs) are currently demonstrating tremendous potential in terms of straightforward processing, a plentiful supply of materials, and easy architectural integration, as well as high power conversion efficiency (PCE). However, the elemental composition of the widely utilized organic–inorganic halide perovskites (OIHPs) contains the hazardous lead (Pb). The presence of Pb in the PSCs is problematic because of its toxicity which may slow down or even impede the pace of commercialization. As a backup option, the scientific community has been looking for non-toxic/less-toxic elements that can replace Pb in OIHPs. Despite not yet matching the impressive results of Pb-containing OIHPs, the community is paying close attention to Pb-free materials and has seen some encouraging findings. This review evaluates the Pb-replacement with suitable elements and scrutinizes the desirable optoelectronic features of such elements in OIHPs. The fundamental features of Pb-free OIHPs together with their photovoltaic performance in the PSCs are evaluated in details. Finally, we sum up the current challenges and potential opportunities for the Pb-free OIHPs and their devices.
{"title":"Desirable candidates for high-performance lead-free organic–inorganic halide perovskite solar cells","authors":"","doi":"10.1007/s40243-024-00255-w","DOIUrl":"https://doi.org/10.1007/s40243-024-00255-w","url":null,"abstract":"<h3>Abstract</h3> <p>Perovskite solar cells (PSCs) are currently demonstrating tremendous potential in terms of straightforward processing, a plentiful supply of materials, and easy architectural integration, as well as high power conversion efficiency (PCE). However, the elemental composition of the widely utilized organic–inorganic halide perovskites (OIHPs) contains the hazardous lead (Pb). The presence of Pb in the PSCs is problematic because of its toxicity which may slow down or even impede the pace of commercialization. As a backup option, the scientific community has been looking for non-toxic/less-toxic elements that can replace Pb in OIHPs. Despite not yet matching the impressive results of Pb-containing OIHPs, the community is paying close attention to Pb-free materials and has seen some encouraging findings. This review evaluates the Pb-replacement with suitable elements and scrutinizes the desirable optoelectronic features of such elements in OIHPs. The fundamental features of Pb-free OIHPs together with their photovoltaic performance in the PSCs are evaluated in details. Finally, we sum up the current challenges and potential opportunities for the Pb-free OIHPs and their devices.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139750644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-16DOI: 10.1007/s40243-023-00254-3
Ibrahim Ali Al-Najati, Abbas F. Jasim, Keng Wai Chan, Swee-Yong Pung
Piezoelectric energy harvesting is gaining popularity as an eco-friendly solution to harvest energy from tire deformation for tire condition monitoring systems in vehicles. Traditional piezoelectric harvesters, such as cymbal and bridge structures, cannot be used inside tires due to their design limitations. The wider adoption of renewable energy sources into the energy system is increasing rapidly, reflecting a global attraction toward the utilization of sustainable power sources (Aljendy et al. in Int J Power Energy Convers 12(4): 314–337, 2021; Yesner et al. in Evaluation of a novel piezoelectric bridge transducer. In: 2017 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF)/International Workshop on Acoustic Transduction Materials and Devices (IWATMD)/Piezoresponse Force Microscopy (PFM). IEEE, 2017). The growing interest in capturing energy from tire deformation for Tire Pressure Monitoring Systems (TPMS) aligns with this trend, providing a promising and self-sustaining alternative to traditional battery-powered systems. This study presents a novel one-end cap tire strain piezoelectric energy harvester (TSPEH) that can be used efficiently and reliably inside a tire. The interaction between the tire and energy harvester was analyzed using a decoupled modeling approach, which showed that stress concentration occurred along the edge of the end cap. The TSPEH generated a maximum voltage of 768 V under 2 MPa of load, resulting in an energy output of 32.645 J/rev under 1 MPa. The computational findings of this study were consistent with previous experimental investigations, confirming the reliability of the numerical simulations. The results suggest that the one-end cap structure can be an effective energy harvester inside vehicle tires, providing a valuable solution for utilizing one-end cap structures in high-deformation environments such as vehicle tires.
压电能量采集作为一种从轮胎变形中采集能量的环保解决方案,在汽车轮胎状态监测系统中越来越受欢迎。传统的压电能量收集器,如钹和桥式结构,由于其设计限制,无法在轮胎内部使用。可再生能源在能源系统中的广泛应用正在迅速增加,这反映了全球对利用可持续能源的吸引力(Aljendy 等人,载于 Int J Power Energy Convers 12(4):314-337, 2021;Yesner 等人,《新型压电桥式传感器的评估》。In: 2017 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF)/International Workshop on Acoustic Transduction Materials and Devices (IWATMD)/Piezoresponse Force Microscopy (PFM).IEEE,2017)。从轮胎变形中获取能量用于胎压监测系统(TPMS)的兴趣与日俱增,这符合这一趋势,为传统电池供电系统提供了一种前景广阔且可自我维持的替代方案。本研究提出了一种新型单端帽轮胎应变压电能量收集器(TSPEH),可在轮胎内高效可靠地使用。研究采用解耦建模方法分析了轮胎与能量收集器之间的相互作用,结果表明应力集中发生在端盖边缘。在 2 兆帕的负载下,TSPEH 产生的最大电压为 768 V,在 1 兆帕的负载下,能量输出为 32.645 J/rev。本研究的计算结果与之前的实验研究结果一致,证实了数值模拟的可靠性。结果表明,一端盖结构可以成为汽车轮胎内的有效能量收集器,为在汽车轮胎等高变形环境中使用一端盖结构提供了有价值的解决方案。
{"title":"The future of tire energy: a novel one-end cap structure for sustainable energy harvesting","authors":"Ibrahim Ali Al-Najati, Abbas F. Jasim, Keng Wai Chan, Swee-Yong Pung","doi":"10.1007/s40243-023-00254-3","DOIUrl":"https://doi.org/10.1007/s40243-023-00254-3","url":null,"abstract":"<p>Piezoelectric energy harvesting is gaining popularity as an eco-friendly solution to harvest energy from tire deformation for tire condition monitoring systems in vehicles. Traditional piezoelectric harvesters, such as cymbal and bridge structures, cannot be used inside tires due to their design limitations. The wider adoption of renewable energy sources into the energy system is increasing rapidly, reflecting a global attraction toward the utilization of sustainable power sources (Aljendy et al. in Int J Power Energy Convers 12(4): 314–337, 2021; Yesner et al. in Evaluation of a novel piezoelectric bridge transducer. In: 2017 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF)/International Workshop on Acoustic Transduction Materials and Devices (IWATMD)/Piezoresponse Force Microscopy (PFM). IEEE, 2017). The growing interest in capturing energy from tire deformation for Tire Pressure Monitoring Systems (TPMS) aligns with this trend, providing a promising and self-sustaining alternative to traditional battery-powered systems. This study presents a novel one-end cap tire strain piezoelectric energy harvester (TSPEH) that can be used efficiently and reliably inside a tire. The interaction between the tire and energy harvester was analyzed using a decoupled modeling approach, which showed that stress concentration occurred along the edge of the end cap. The TSPEH generated a maximum voltage of 768 V under 2 MPa of load, resulting in an energy output of 32.645 J/rev under 1 MPa. The computational findings of this study were consistent with previous experimental investigations, confirming the reliability of the numerical simulations. The results suggest that the one-end cap structure can be an effective energy harvester inside vehicle tires, providing a valuable solution for utilizing one-end cap structures in high-deformation environments such as vehicle tires.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139750706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-05DOI: 10.1007/s40243-023-00253-4
Pedro Henrique da Rosa Braun, Anne Kuchenbuch, Bruno Toselli, Kurosch Rezwan, Falk Harnisch, Michaela Wilhelm
3D-printed anodes for bioelectrochemical systems are increasingly being reported. However, comparisons between 3D-printed anodes and their non-3D-printed counterparts with the same material composition are still lacking. In addition, surface roughness parameters that could be correlated with bioelectrochemical performance are rarely determined. To fill these gaps, slurries with identical composition but different mass fractions were processed into SiOC anodes by tape-casting, freeze-casting, or direct-ink writing. The current generation was investigated using electroactive biofilms enriched with Geobacter spp. Freeze-cast anodes showed more surface pores and the highest surface kurtosis of 5.7 ± 0.5, whereas tape-cast and 3D-printed anodes showed a closed surface porosity. 3D-printing was only possible using slurries 85 wt% of mass fraction. The surface pores of the freeze-cast anodes improved bacterial adhesion and resulted in a high initial (first cycle) maximum current density per geometric surface area of 9.2 ± 2.1 A m−2. The larger surface area of the 3D-printed anodes prevented pore clogging and produced the highest current density per geometric surface area of 12.0 ± 1.2 A m−2. The current density values of all anodes are similar when the current density is normalized over the entire geometric surface as determined by CT-scans. This study highlights the role of geometric surface area in normalizing current generation and the need to use more surface roughness parameters to correlate anode properties, bacterial adhesion, and current generation.
用于生物电化学系统的三维打印阳极的报道越来越多。然而,三维打印阳极与具有相同材料成分的非三维打印阳极之间仍然缺乏比较。此外,与生物电化学性能相关的表面粗糙度参数也很少确定。为了填补这些空白,我们采用胶带浇铸、冷冻浇铸或直接墨水写入等方法将成分相同但质量分数不同的浆料加工成 SiOC 阳极。冷冻铸造阳极显示出更多的表面孔隙和最高的表面峰度(5.7 ± 0.5),而胶带铸造和三维打印阳极则显示出封闭的表面孔隙率。只有使用质量分数为 85% 的浆料才能进行 3D 打印。冷冻铸造阳极的表面孔隙提高了细菌的附着力,并使单位几何表面积的初始(第一周期)最大电流密度达到 9.2 ± 2.1 A m-2。三维打印阳极的表面积更大,可防止孔隙堵塞,产生的单位几何表面积最高电流密度为 12.0 ± 1.2 A m-2。根据 CT 扫描确定的整个几何表面的电流密度归一化后,所有阳极的电流密度值相似。这项研究强调了几何表面积在归一化电流产生中的作用,以及使用更多表面粗糙度参数来关联阳极特性、细菌附着和电流产生的必要性。
{"title":"Influence of the 3D architecture and surface roughness of SiOC anodes on bioelectrochemical system performance: a comparative study of freeze-cast, 3D-printed, and tape-cast materials with uniform composition","authors":"Pedro Henrique da Rosa Braun, Anne Kuchenbuch, Bruno Toselli, Kurosch Rezwan, Falk Harnisch, Michaela Wilhelm","doi":"10.1007/s40243-023-00253-4","DOIUrl":"https://doi.org/10.1007/s40243-023-00253-4","url":null,"abstract":"<p>3D-printed anodes for bioelectrochemical systems are increasingly being reported. However, comparisons between 3D-printed anodes and their non-3D-printed counterparts with the same material composition are still lacking. In addition, surface roughness parameters that could be correlated with bioelectrochemical performance are rarely determined. To fill these gaps, slurries with identical composition but different mass fractions were processed into SiOC anodes by tape-casting, freeze-casting, or direct-ink writing. The current generation was investigated using electroactive biofilms enriched with <i>Geobacter</i> spp. Freeze-cast anodes showed more surface pores and the highest surface kurtosis of 5.7 ± 0.5, whereas tape-cast and 3D-printed anodes showed a closed surface porosity. 3D-printing was only possible using slurries 85 wt% of mass fraction. The surface pores of the freeze-cast anodes improved bacterial adhesion and resulted in a high initial (first cycle) maximum current density per geometric surface area of 9.2 ± 2.1 A m<sup>−2</sup>. The larger surface area of the 3D-printed anodes prevented pore clogging and produced the highest current density per geometric surface area of 12.0 ± 1.2 A m<sup>−2</sup>. The current density values of all anodes are similar when the current density is normalized over the entire geometric surface as determined by CT-scans. This study highlights the role of geometric surface area in normalizing current generation and the need to use more surface roughness parameters to correlate anode properties, bacterial adhesion, and current generation.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139764965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-31DOI: 10.1007/s40243-024-00257-8
Adamu Ahmed Goje, Norasikin Ahmad Ludin, Puteri Nor Aznie Fahsyar, Ubaidah Syafiq, Puvaneswaran Chelvanathan, Abu Dzar Al-Ghiffari Syakirin, Mohd Asri Teridi, Mohd Adib Ibrahim, Mohd Sukor Su’ait, Suhaila Sepeai, Ahmad Shah Hizam Md Yasir
Perovskite solar cells (PSCs) have shown a significant increase in power conversion efficiency (PCE) under laboratory circumstances from 2006 to the present, rising from 3.8% to an astonishing 25%. This scientific breakthrough corresponds to the changing energy situation and rising industrial potential. The flexible perovskite solar cell (FPSC), which capitalizes on the benefits of perovskite thin-film deposition and operates at low temperatures, is key to this transition. The FPSC is strategically important for large-scale deployment and mass manufacturing, especially when combined with the benefits of perovskite thin-film deposition under moderate thermodynamic conditions. Its versatility is demonstrated by the ease with which it may be folded, rolled, or coiled over flexible substrates, allowing for efficient transportation. Notably, FPSCs outperform traditional solar panels in terms of adaptability. FPSCs have several advantages over rigid substrates, including mobility, lightweight properties that help transportation, scalability via roll-to-roll (R2R) deposition, and incorporation into textiles and architecture. This in-depth examination dives into their fundamental design and various fabrication techniques, which include conducting substrates, absorber layers, coordinated charge movement, and conductive electrodes. This review evaluates critical FPSC fabrication techniques such as thermal evaporation, R2R approaches, slot die and spray deposition, blade coating, and spin coating. The present challenges in constructing FPSCs with high performance and long-term stability are also highlighted. Finally, the solar industry's potential uses for both indoor and outdoor FPSCs have been discussed.
{"title":"Review of flexible perovskite solar cells for indoor and outdoor applications","authors":"Adamu Ahmed Goje, Norasikin Ahmad Ludin, Puteri Nor Aznie Fahsyar, Ubaidah Syafiq, Puvaneswaran Chelvanathan, Abu Dzar Al-Ghiffari Syakirin, Mohd Asri Teridi, Mohd Adib Ibrahim, Mohd Sukor Su’ait, Suhaila Sepeai, Ahmad Shah Hizam Md Yasir","doi":"10.1007/s40243-024-00257-8","DOIUrl":"https://doi.org/10.1007/s40243-024-00257-8","url":null,"abstract":"<p>Perovskite solar cells (PSCs) have shown a significant increase in power conversion efficiency (PCE) under laboratory circumstances from 2006 to the present, rising from 3.8% to an astonishing 25%. This scientific breakthrough corresponds to the changing energy situation and rising industrial potential. The flexible perovskite solar cell (FPSC), which capitalizes on the benefits of perovskite thin-film deposition and operates at low temperatures, is key to this transition. The FPSC is strategically important for large-scale deployment and mass manufacturing, especially when combined with the benefits of perovskite thin-film deposition under moderate thermodynamic conditions. Its versatility is demonstrated by the ease with which it may be folded, rolled, or coiled over flexible substrates, allowing for efficient transportation. Notably, FPSCs outperform traditional solar panels in terms of adaptability. FPSCs have several advantages over rigid substrates, including mobility, lightweight properties that help transportation, scalability via roll-to-roll (R2R) deposition, and incorporation into textiles and architecture. This in-depth examination dives into their fundamental design and various fabrication techniques, which include conducting substrates, absorber layers, coordinated charge movement, and conductive electrodes. This review evaluates critical FPSC fabrication techniques such as thermal evaporation, R2R approaches, slot die and spray deposition, blade coating, and spin coating. The present challenges in constructing FPSCs with high performance and long-term stability are also highlighted. Finally, the solar industry's potential uses for both indoor and outdoor FPSCs have been discussed.</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139645569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-24DOI: 10.1007/s40243-023-00243-6
Alexandra Grekova, Svetlana Strelova, Marina Solovyeva, Mikhail Tokarev
The use of energy from alternative energy sources as well as the use of waste heat are key elements of an efficient energetics. Adsorption heat storage is a technology that allows solving such problems. For the successful operation of an adsorption heat accumulator, it is necessary to analyze the thermophysical characteristics of the system under the conditions of the operating cycle: heat transfer coefficient adsorbent-metal (α2), overall (U) and global (UA) heat transfer coefficients of heat exchanger. Multi-walled carbon nanotube (MWCNT) composites are very promising for adsorption-based renewable energy storage and conversion technologies. In this work at the stage of heat release, α2 was measured by the large pressure jump (LPJ) method, at the stage of heat storage by large temperature jump method (LTJ), which made it possible to obtain thermophysical characteristics that corresponded to the implementation of the real working cycle as much as possible. The heat transfer coefficients for a pair of adsorbent LiCl/MWCNT—methanol are measured for the first time under the conditions of a daily heat storage cycle both at the sorption stage (α2 = 190 W/m2K) and at the desorption stage (α2 = 170 W/m2K).
{"title":"The thermophysical properties of a promising composite adsorbent based on multi-wall carbon nanotubes for heat storage","authors":"Alexandra Grekova, Svetlana Strelova, Marina Solovyeva, Mikhail Tokarev","doi":"10.1007/s40243-023-00243-6","DOIUrl":"https://doi.org/10.1007/s40243-023-00243-6","url":null,"abstract":"<p>The use of energy from alternative energy sources as well as the use of waste heat are key elements of an efficient energetics. Adsorption heat storage is a technology that allows solving such problems. For the successful operation of an adsorption heat accumulator, it is necessary to analyze the thermophysical characteristics of the system under the conditions of the operating cycle: heat transfer coefficient adsorbent-metal (α<sub>2</sub>)<sub>,</sub> overall (U) and global (UA) heat transfer coefficients of heat exchanger. Multi-walled carbon nanotube (MWCNT) composites are very promising for adsorption-based renewable energy storage and conversion technologies. In this work at the stage of heat release, α<sub>2</sub> was measured by the large pressure jump (LPJ) method, at the stage of heat storage by large temperature jump method (LTJ), which made it possible to obtain thermophysical characteristics that corresponded to the implementation of the real working cycle as much as possible. The heat transfer coefficients for a pair of adsorbent LiCl/MWCNT—methanol are measured for the first time under the conditions of a daily heat storage cycle both at the sorption stage (α<sub>2</sub> = 190 W/m<sup>2</sup>K) and at the desorption stage (α<sub>2</sub> = 170 W/m<sup>2</sup>K).</p>","PeriodicalId":692,"journal":{"name":"Materials for Renewable and Sustainable Energy","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139553696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Briquetted biomass, like sugarcane bagasse, a by-product of sugar mills, is a renewable energy source. This study aimed at the production and characterization of bagasse briquettes. The production of briquettes was carried out with different blending ratios (5, 10, and 15%) and average particle sizes (0.75, 2.775, and 4.8 mm) with various binders of cow dung, waste paper, and admixture (molasses and wastepaper). The bagasse underwent drying, size reduction, sieving, binder addition, and densification using a manual press during the briquetting process. Characterization of the physical and combustion parameters of briquettes, such as density, shatter resistance, proximate, and calorific value, followed the American Society for Testing and Materials procedures. The result shows that the maximum density of briquettes was 0.804 g/cm3, while shatter resistance varied from 83.051 to 94.975% (4.8mm, 5% cow dung and 0.75mm, 5% admixture binders respectively). ANOVA analysis showed that the factors and their interactions had a significant influence (p value < 0.05) on the physical properties. The optimum parameters of briquettes achieved were 14.953% admixture binder, 0.776 mm particle size, 0.805 g/cm3 density, and 95.811% shatter resistance. Bagasse briquettes with a 5% cow dung binder achieved a high calorific value of 39927.05 kcal/kg. The ultimate analysis revealed a composition of 47.49% carbon (C), 5.133% hydrogen (H), 1.557% nitrogen (N), 0.374% sulfur (S), and 45.446% oxygen (O). Therefore, bagasse has a high calorific value and can be used for briquetting to replace fossil fuel and firewood in different applications. In addition, due to its availability, utilizing as fuel source has economic advantage.