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Simulation and Analysis of Small-Scale solar Adsorption cooling System for Cold Climate

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Simulation and Analysis of Small-Scale Solar Adsorption Cool...

Analysis of solar Direct-Driven Organic Rankine Cycle Powered Vapor Compression cooling System Combined with Electric Motor for Office Building Air-Conditioning

作者： Karolis Janu?evi?ius Giedr? Streckien? Violeta Misevi?iūt? Faculty of Environmental Engineering the Department of Building EnergeticsVilnius Gediminas Technical University

In the current study, research on the performance characteristics of an adsorption cooling system supplied by solar energy is presented. The main task for the analyzed system was to ensure cooling load for the non-residential building in cold climate country. A 8.0 k W adsorption thermal cooling system was studied. The system got heat produced by evacuated tube solar collectors. The parametric simulation study was carried using a TRNSYS(Transient Systems Simulation) program to determine the influence of various parameters on the system performance. The dependencies of collector slope and the total absorber area on solar fraction, discarded energy, coefficient of performance, seasonal performance factor were studied. The highest solar fraction, coefficient of performance and seasonal performance factor values were obtained if the collector slope was approximately 30 degrees and the absorber area was 16 m for the analyzed cases. The total primary energy consumption of the system was examined for various cases of primary energy factor for auxiliary heat and consumed electricity. On the basis of the results, it was proposed the expression of total primary energy consumption. The obtained results could be used for the recommendation preparations for decision makers to select a small scale solar cooling adsorption system.

关键词： Adsorption chiller coefficient of performance solar cooling TRNSYS

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Energy Engineering 2021年第1期118卷 89-101页

作者： Xiang Xiao Wei Zhao Wei Wang Wei Zhang Xianbiao Bu Lingbao Wang Huashan Li Electric Power Research Institute of Guangdong Power Grid Co. Ltd.Guangzhou510640China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou510640China

solar energy powered organic Rankine cycle vapor compression cycle(ORC-VCC)is a good alternative to convert solar heat into a cooling *** this study,an ORC-VCC system driven by solar energy combined with electric motor is proposed to ensure smooth operation under the conditions that solar radiation is unstable and discontinuous,and an office building located in Guangzhou,China is selected as a case *** results show that beam solar radiation and generation temperature have considerable effects on the system *** is an optimal generation temperature at which the system achieves optimum ***,as a key indicator,the cooling power per square meter collector should be considered in the hybrid solar cooling system in design *** to the vapor compression cooling system,the hybrid cooling system can save almost 68.23%of electricity consumption.

关键词： solar cooling organic Rankine cycle vapor compression cycle hybrid solar cooling system office building air-conditioning

Exergy Analysis of a solar Vapor Compression Refrigeration System Using R1234ze(E)as an Environmentally Friendly Replacement of R134a

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Frontiers in Heat and Mass Transfer 2024年第4期22卷 1107-1128页

作者： Zakaria Triki Ahmed Selloum Younes Chiba Hichem Tahraoui Dorsaf Mansour Abdeltif Amrane Meriem Zamouche Mohammed Kebir Jie Zhang Laboratory of Biomaterials and Transport Phenomena University of MedeaMedea26000Algeria Laboratoire de Génie des Procédés Chimiques Department of Process EngineeringUniversity of Ferhat AbbasSetif19000Algeria Chemistry Department College of SciencesUniversity of HailHail55223Saudi Arabia Univ Rennes Ecole Nationale Supérieure de Chimie de RennesCNRSISCR–UMR6226RennesF-35000France Laboratoire de Recherche sur le Médicament et le Développement Durable(ReMeDD) Faculty of Process EngineeringUniversity of Salah Boubnider Constantine 3Constantine25000Algeria Research Unit on Analysis and Technological Development in Environment(UR-ADTE/CRAPC) Bou-IsmailTipaza42004Algeria School of Engineering Merz CourtNewcastle UniversityNewcastle upon TyneNE17RUUK

Refrigeration plays a significant role across various aspects of human life and consumes substantial amounts of electrical *** rapid advancement of green cooling technology presents numerous solar-powered refrigeration systems as viable alternatives to traditional refrigeration *** analysis is a key in identifying actual thermodynamic losses and improving the environmental and economic efficiency of refrigeration *** this study exergy analyze has been conducted for a solar-powered vapor compression refrigeration(SP-VCR)system in the region of Gharda颽(Southern Algeria)utilizing R1234ze(E)fluid as an eco-friendly substitute for R134a refrigerant.A MATLAB-based numerical model was developed to evaluate losses in different system components and the exergy efficiency of the SP-VCR ***,a parametric study was carriedout to analyze the impact of various operating conditions on the system’s exergy destruction and *** obtained results revealed that,for both refrigerants,the compressor exhibited the highest exergy destruction,followed by the condenser,expansion valve,and ***,the system using R1234ze(E)demonstrated lower irreversibility compared to that using R134a *** improvements made with R1234ze are 71.95%for the compressor,39.13%for the condenser,15.38%for the expansion valve,5%for the evaporator,and 54.76%for the overall system,which confirm the potential of R1234ze(E)as a promising alternative to R134a for cooling applications.

关键词： solar cooling vapor compression refrigeration eco-friendly refrigerant thermodynamic losses exergy analysis

Effect of Adsorbent/Adsorbate Couple on the Performance of Adsorption solar Refrigerator

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Engineering（科研） 2022年第3期14卷 95-112页

作者： Guy Christian Tubreoumya Eloi Salmwendé Tiendrebeogo Oumar Bailou Téré Dabilgou Belkacem Zeghmati Alfa Oumar Dissa Jean Koulidiati Antoine Bere Laboratoire de Physique et de Chimie de l’Environnement (LPCE) Université Joseph Ki Zerbo Ouagadougou Burkina Faso LAboratoire de Mathématiques et Physique (LA.M.P.S) Université de Perpignan Via Domitia (UPVD) Perpignan France

This work presents a contribution to the study of the process of cold production by adsorption from solar energy. In this paper, we discuss a comparative study of the operation of a solar adsorption refrigerator using the silica gel-water couple and the zeolite-water couple through dynamic modeling and simulation. The mathematical model representing the evolution of heat and mass transfer at each component of the adsorption solar refrigerator has been developed. It appears from this study that the evolution of the temperature of the two adsorbents (zeolite and silica gel) is quasi-similar throughout the operating cycle. However, the maximum mass of water vapor adsorbed by the silicagel (0.24 kg/kg) is higher than that adsorbed by the zeolite (0.201 kg/kg). In the same way, the mass of water vapor cycled, obtained with the silicagel-water couple which is 0.14 kg/kg, is higher than that obtained with the zeolite-water couple which is 0.081 kg/kg. Therefore, the amount of cold produced 9.178 MJ and the solar coefficient of performance 0.378 obtained with the solar refrigerator using the silica gel-water couple, are better.

关键词： solar cooling Adsorption Zeolite Silica Gel Water Heat and Mass Transfer