Concentrating solar collectors in absorption and adsorption cooling cycles: An overview

Alsagri, Ali Sulaiman; Alrobaian, Abdulrahman A.; Almohaimeed, Sulaiman A.

doi:10.1016/j.enconman.2020.113420

Cited by 63 publications

(9 citation statements)

References 195 publications

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“…The last part of the VPSC design was the ethanol distillation system, which comprised two components: the heat exchanger unit and the condenser unit [32,33]. The heat exchanger unit was made of a stainless-steel box and ceramic insulation with a thickness of 10 mm and dimension (width × length × height) of 0.300 m × 0.315 m × 0.250 m. The ceramic insulation prevented heat loss in the heat exchange process.…”

Section: Design Of Vacuum-tube Parabolic Solar Collectormentioning

confidence: 99%

Efficiency of Semi-Automatic Control Ethanol Distillation Using a Vacuum-Tube Parabolic Solar Collector

Pisitsungkakarn

Neamyou

2022

Energies

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Thailand is an agricultural country with several agro-industrial by-products that can be processed into fuels. Although producing ethanol from agro-industrial by-products is an interesting option, the process of distilling ethanol from fermented agricultural products requires a high temperature to increase the ethanol concentration from 10% to 95%. In this research, solar ethanol distillation equipment incorporating a solar parabolic collector with a vacuum heat absorber tube to increase efficiency by reducing heat loss was designed and developed. An electronic device was used to control the distillation process, maintain the required temperature, and make suitable adjustments to the solar radiation acceptance angles of the parabolic solar collector. Ethanol dilution at concentrations of 10%, 15%, and 20%, and Sato (Thai Rice Wine) were used as the reactant in the distillation process. The result of distilling ethanol distillation with a semi-automatic control using a vacuum-tube parabolic solar collector showed that the thermal efficiency of the receiver was 12.61%, 13.93%, 18.58%, and 17.40%, respectively. The thermal efficiency of the heat exchanger was 11.27%, 10.76%, 13.35%, and 12.35%, respectively. The final concentration of ethanol was 67%, 76%, 82%, and 80%, respectively, and the amount of the distilled ethanol was 330 mL, 352 mL, 398 mL, and 360 mL, respectively.

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Section: Design Of Vacuum-tube Parabolic Solar Collectormentioning

confidence: 99%

Efficiency of Semi-Automatic Control Ethanol Distillation Using a Vacuum-Tube Parabolic Solar Collector

Pisitsungkakarn

Neamyou

2022

Energies

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“…5 Compound parabolic concentrator (CPC) can significantly enhance the collection efficiency of solar energy. 6 In addition, the cascade application of solar energy is also an important method to optimize the overall efficiency of solar energy systems. 7 Cheng et al 8 studied a cascade regeneration system powered by solar energy, which has lower heating temperatures and higher energy utilization efficiency compared to traditional regeneration systems.…”

Section: ■ Introductionmentioning

confidence: 99%

Evaluation and Optimization of an Integrated Refrigeration and Dehumidification Process for Solar Energy Cascade Utilization Based on Exergy, Exergoeconomic, and Exergoenvironmental Analyses

Xu,

Luo,

Zeng

et al. 2024

ACS Sustainable Chem. Eng.

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In this work, an innovative solar-powered integrated system coupling absorption refrigeration with liquid dehumidification is proposed. This system can effectively achieve the cascade utilization of solar energy. The exergy, exergoeconomic, and exergoenvironmental analyses are conducted to evaluate the techno-economics and environmental benefits of the proposed system. A parametric study is performed to determine the effect of air humidity, refrigeration temperature, and segment temperature on the total exergy destruction (ExḊ , total ), exergy efficiency (ε ex ), total exergoeconomic cost rate (R ̇total ), and total exergo-environmental impact rate (B ̇total ) of the system. Three objective functions, ε ex , R ̇total , and B ̇total are selected for multiobjective optimization (MOO). The results indicate that the ExḊ , total , ε ex , R ̇total , and B ̇total of the system are 516.584 kW, 43.176%, 59.171 $/h, and 2307.216 mPts/h, respectively. When the air humidity increases, the exergy efficiency, economy, and environmental benefits of the system all decrease. The increase in refrigeration temperature causes the ExḊ , total and B ̇total to increase by 9.85 and 5.02%, ε ex and R ̇total decreased by 11.42 and 3.03%. The system has a higher exergy efficiency at a higher segment temperature. According to the system MOO results, the optimal solutions for ε ex , R ̇total , and B ̇total are 44.88%, 57.24 $/h, and 2281.77 mPts/h, respectively. Among them, ε ex has increased by 3.80% compared to the original solution, and R ̇total and B ̇total have decreased by 3.26 and 1.10%, respectively. This work provides a reference scheme for the development and optimization of solar-integrated systems.

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“…As time goes by, renewable energy becomes vital, referring to the energy shortage on fossil fuels. In past decades, scientists paid more attention to using renewable energies like solar as a primary energy source [ 1 ]. Many methods could use this energy, such as power production, refrigeration, food drying, water heating, and space heating [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Photovoltaic and Photovoltaic Thermal Technologies for Refrigeration Purposes: An Overview

Alsagri

2022

Arab J Sci Eng

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Refrigeration systems have a broad range of applications, playing a critical role in human life. Especially, vaccine preservation in rural regions has become more critical than in the past during the COVID19 era. In this sense, meeting the cooling process's energy need with renewable energy is critical, as the grid cannot support it. Thus, solar energy has been extensively studied for use in refrigeration cycles. Compression, absorption, adsorption, desiccant, and ejector refrigeration cycles are frequently used in this configuration. This article discusses multiple studies showing various attributes' impact on a system's overall efficiency. Most previous reviews did not cover PV with refrigeration cycles. So, this paper surveys the literature on PV-powered cooling cycles. For better classification, PV technologies are categorized into three types: PV, PVT, and CPVT. With this regard, CPVTs still have a way to progress due to a lack of studies compared to PV. The works are divided into three main sections as Exergy Studies, Experimental Studies, and Simulation and Numerical Studies. This review paper categorizes and rates refrigeration-assisted solar systems based on exergy destruction, exergy efficiency, and COP of cooling cycles. The results showed that PV panels have the highest exergy destruction in most of the systems. It is concluded that using PV technologies has a great potential to supply cooling demand, especially in a hot climate condition. Moreover, the study's findings are anticipated to aid designers in scaling up photovoltaic-based cooling systems, resulting in more efficient and sustainable designs.

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Concentrating solar collectors in absorption and adsorption cooling cycles: An overview

Cited by 63 publications

References 195 publications

Efficiency of Semi-Automatic Control Ethanol Distillation Using a Vacuum-Tube Parabolic Solar Collector

Efficiency of Semi-Automatic Control Ethanol Distillation Using a Vacuum-Tube Parabolic Solar Collector

Evaluation and Optimization of an Integrated Refrigeration and Dehumidification Process for Solar Energy Cascade Utilization Based on Exergy, Exergoeconomic, and Exergoenvironmental Analyses

Photovoltaic and Photovoltaic Thermal Technologies for Refrigeration Purposes: An Overview

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