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Journal articles on the topic 'Absorption machines'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Ahachad, M., M. Charia, and A. Bernatchou. "Solar absorption heat transformer applications to absorption refrigerating machines." International Journal of Energy Research 17, no. 8 (1993): 719–26. http://dx.doi.org/10.1002/er.4440170806.

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2

Labus, Jerko, Carles Bruno, and Alberto Coronas. "Review on absorption technology with emphasis on small capacity absorption machines." Thermal Science 17, no. 3 (2013): 739–62. http://dx.doi.org/10.2298/tsci120319016l.

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The aim of this paper is to review the past achievements in the field of absorption systems, their potential and possible directions for future development. Various types of absorption systems and research on working fluids are discussed in detail. Among various applications, solar cooling and combined cooling, heating and power (CCHP) are identified as two most promising applications for further development of absorption machines. Under the same framework, special attention is given to the small capacity absorption machines and their current status at the market. Although this technology look

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3

Shamarov, M. V., E. G. Stepanova, A. V. Kolinko, and A. M. Shamarov. "Prospects for the use of a membrane refrigeration unit for the production of cold as an alternative to absorption." Herald of Dagestan State Technical University. Technical Sciences 50, no. 4 (2024): 26–36. http://dx.doi.org/10.21822/2073-6185-2023-50-4-26-36.

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Objective. The purpose of the study is to determine the prospects for using a membrane refrigeration unit for the production of cold as an alternative to absorption. Method. The study was carried out using a numerical experiment and verification of the results obtained on an experimental bench. Result. An analysis was made of the use of a traditional absorption refrigeration machine and a membrane refrigeration machine from the point of view of energy efficiency and the number of working elements. Presented for comparison are methods for calculating the separation process of the “absorbent-ref

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4

van de Ven, H. "Absorption machines for future energy systems." International Journal of Refrigeration 22, no. 3 (1999): 244. http://dx.doi.org/10.1016/s0140-7007(98)00064-4.

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5

Fujita, T. "Falling liquid films in absorption machines." International Journal of Refrigeration 16, no. 4 (1993): 282–94. http://dx.doi.org/10.1016/0140-7007(93)90081-i.

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6

Ben Zid, Nihel, Nejib Hajji, and Mohamed El Ganaoui. "COP enhancement and comparison of different absorption cooling systems." MATEC Web of Conferences 330 (2020): 01032. http://dx.doi.org/10.1051/matecconf/202033001032.

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The absorption refrigeration machines represent a good alternative to compression refrigeration machines but the major problem of this type of refrigeration lies in the COP, which seems to be less efficient. Several researches are carried out to improve the performances of these machines such as the combination with the technology of the ejectors. In this work, we are interested in the three ammonia-water absorption cycles: Single effect absorption, Ejector-absorption and Combined ejector-flash tank absorption cycles. A gas-gas ejector would be installed between the generator and the condenser

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7

Ben Zid, Nihel, Mohammed El Ganaoui, and Nejib Hajji. "Simulation and comparison of combined ejector-absorption and single effect absorption refrigeration systems." MATEC Web of Conferences 307 (2020): 01008. http://dx.doi.org/10.1051/matecconf/202030701008.

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Refrigeration by absorption is gaining more and more importance nowadays especially in applications where the source of energy used in the generator is renewable. However the major problem of this type of refrigeration lies in the COP, which seems to be weaker than compression machines. The use of an ejector is one of the means that can help overcome this problem. In this work, we are interested in the ammonia-water absorption cycle comprising a gas-gas ejector interposed between the generator and the condenser. We suppose that adding a flash tank between the condenser and the evaporator could

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8

Martı́nez, P. J., and J. M. Pinazo. "A method for design analysis of absorption machines." International Journal of Refrigeration 25, no. 5 (2002): 634–39. http://dx.doi.org/10.1016/s0140-7007(01)00052-4.

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9

Golasi, Iacopo, Ferdinando Salata, Emanuele de Lieto Vollaro, and Massimo Coppi. "The degradation of ammonia in absorption thermal machines." Energy Procedia 126 (September 2017): 321–28. http://dx.doi.org/10.1016/j.egypro.2017.08.252.

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10

Mitchison, Mark T. "Quantum thermal absorption machines: refrigerators, engines and clocks." Contemporary Physics 60, no. 2 (2019): 164–87. http://dx.doi.org/10.1080/00107514.2019.1631555.

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11

Aly, S. E. "Humidity water vapour collection by absorption cooling machines." Desalination 73 (January 1989): 139–65. http://dx.doi.org/10.1016/0011-9164(89)87010-9.

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12

Laoufi, S., and B. Draoui. "The parametric study of an absorption refrigeration system single effect with water-lithium bromide." Journal of Fundamental and Applied Sciences 12, no. 3 (2020): 1018–34. http://dx.doi.org/10.4314/jfas.v12i3.3.

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Absorption machines present an interesting alternative to conventional air conditioning systems. The Absorption machines offer an ecological aspect, in terms of the possibility of using solar energy as a heat source, and refrigerant having no ozone –depleting potential or global warning effect reported in literature. In this paper a performance of a single effect absorption refrigeration systems of Water-Lithium Bromide are studied, some physical quantities were modelled and Plots, in particular the effect of operating temperatures on the coefficient of performance and the impact of solu

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13

Gyftokostas, Nikolaos, Eleni Nanou, Dimitrios Stefas, Vasileios Kokkinos, Christos Bouras, and Stelios Couris. "Classification of Greek Olive Oils from Different Regions by Machine Learning-Aided Laser-Induced Breakdown Spectroscopy and Absorption Spectroscopy." Molecules 26, no. 5 (2021): 1241. http://dx.doi.org/10.3390/molecules26051241.

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In the present work, the emission and the absorption spectra of numerous Greek olive oil samples and mixtures of them, obtained by two spectroscopic techniques, namely Laser-Induced Breakdown Spectroscopy (LIBS) and Absorption Spectroscopy, and aided by machine learning algorithms, were employed for the discrimination/classification of olive oils regarding their geographical origin. Both emission and absorption spectra were initially preprocessed by means of Principal Component Analysis (PCA) and were subsequently used for the construction of predictive models, employing Linear Discriminant An

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14

Alvarado, Andres Felipe Lazaro, Maria Angelica Gonzalez Carmona, Luis Humberto Martinez Palmeth, and Jose Carlos Charamba Dutra. "Comparison models of the operation of absorption machines using the characteristic equation." OBSERVATÓRIO DE LA ECONOMÍA LATINOAMERICANA 22, no. 6 (2024): e5100. http://dx.doi.org/10.55905/oelv22n6-055.

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The integration of absorption machines in micro-trigeneration systems based on micro gas turbines is one of the most viable options for the use of waste gases from micro-turbines, increasing the energy efficiency of the systems, for which the analytical model proposed by the authors is used (Malinowski & Lewandowska, 2013) and (Wang, Cai, & Zhang, 2004), which was reproduced, tested, modified and extended to gas micro-turbines with different power ratings but of the same type, this model is used to heat the activation fluids of the absorption chillers used in these systems, directly in

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15

Martínez, P. "A method for obtaining performance correlations of absorption machines." International Journal of Thermal Sciences 42, no. 4 (2003): 379–84. http://dx.doi.org/10.1016/s1290-0729(02)00038-8.

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16

Ahachad, M., A. Almers, A. Mimet, and A. Draoui. "Solar-based comparison of adsorption and absorption refrigerating machines." International Journal of Sustainable Energy 24, no. 4 (2005): 199–206. http://dx.doi.org/10.1080/14786450500291784.

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17

Moore, Phoebe V., Kendra Briken, and Frank Engster. "Machines and measure." Capital & Class 44, no. 2 (2020): 139–44. http://dx.doi.org/10.1177/0309816820902016.

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This Special Issue, entitled ‘Machines & Measure’, is largely the dissemination from a workshop held at University of Leicester School of Business, organised by editor Phoebe V Moore, for the Conference for Socialist Economists South Group in February 2018, which was hosted by the University of Leicester School of Business, Philosophy and Political Economy Centre. Not all the authors in the Special Issue were speakers at the event, but this collection provides a carefully selected, representative collection of articles and essays which address the questions and disturbances that drove the

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18

González, J. Onam, José P. Palao, and Daniel Alonso. "Relation between topology and heat currents in multilevel absorption machines." New Journal of Physics 19, no. 11 (2017): 113037. http://dx.doi.org/10.1088/1367-2630/aa8647.

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19

Sasaki, Shinji, Hajime Yabase, and Kazuyuki Makita. "419 The Latest technological development trends in absorption refrigerating machines." Proceedings of the Symposium on Environmental Engineering 2012.22 (2012): 303–6. http://dx.doi.org/10.1299/jsmeenv.2012.22.303.

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20

Lazzarin, R. M., A. Gasparella, and G. A. Longo. "Ammonia-water absorption machines for refrigeration: theoretical and real performances." International Journal of Refrigeration 19, no. 4 (1996): 239–46. http://dx.doi.org/10.1016/0140-7007(96)00016-3.

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21

Hughes, James J. "Self-Absorption in the Digital Era: A Review of "Self-Improvement." Journal of Ethics and Emerging Technologies 33, no. 1 (2023): 1–2. http://dx.doi.org/10.55613/jeet.v33i1.128.

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Mark Coeckelbergh is a Belgian philosopher who specializes in the philosophy of technology. His work primarily explores the intersection of technology and society, specifically the philosophical implications of emerging technologies such as AI and robotics. He has written on whether machines can be moral agents and how ethical frameworks should be applied to autonomous machines. He has a broad philosophical perspective drawing on classical sources, Eastern philosophy, Marxism, Foucault, phenomenology, and the postmodernists. In this short text, he brings his remarkable insights and erudition t

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22

Mavlonova, Iroda, Lobar Nutfullaeva, Jamshid Sharipov, Furqat Ismoyilov, and Sardor Sayitqulov. "A physico-mechanical approach to analyzing nonlinear elasticity in sewing machine conical springs." EPJ Web of Conferences 321 (2025): 01002. https://doi.org/10.1051/epjconf/202532101002.

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This study presents an innovative approach to addressing vibration issues in sewing machines used in the light industry. The research focuses on the experimental analysis of a novel conical spring mechanism designed to enhance shock absorption in the kick mechanism of sewing machines, employing a physico-mechanical approach. This methodology integrates principles from physics and mechanics to provide a nuanced understanding of the spring's nonlinear elasticity and its impact on vibration damping. The study outlines the experimental determination of the oscillation characteristics of the propos

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23

Mungyeko Bisulandu, Baby-Jean Robert, Rami Mansouri, and Adrian Ilinca. "Diffusion Absorption Refrigeration Systems: An Overview of Thermal Mechanisms and Models." Energies 16, no. 9 (2023): 3610. http://dx.doi.org/10.3390/en16093610.

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The energy transition, originating in the limitation of fossil resources and greenhouse gas (GHG) emission reduction, is the basis of many studies on renewable energies in different industrial applications. The diffusion absorption refrigeration machines are very promising insofar as they allow the use of renewable resources (solar, geothermal, waste gas, etc.). This technology is often considered an alternative to vapor compression systems in cooling and refrigeration applications. This paper aims to overview the thermal mechanisms related to modeling system energy sources and highlight the p

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24

Saleh, A. "Development and Evaluation of Acoustic Sound Absorption Composite from Orange Peels Residues and Sachet Water Bags." Journal of Applied Sciences and Environmental Management 26, no. 4 (2022): 655–59. http://dx.doi.org/10.4314/jasem.v26i4.13.

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The goal of this study was produce a device that would reduce the unwanted sound/noise produced by machines encountered in our daily activities using orange peels (agricultural residues) and sachet water bags. These materials were prepared, mixed in 70:30 % ratio and transferred into a two-roll mill (compounding machine), where they were melted at about 150oC temperature before transferring them to a compressing machine that was set at a lower temperature of 130oC. The composite panel was coupled together to form a box where three speakers were connected to MP3 and inserted into the box. Test

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25

Hemex Premjiyani, Arunesh Dwivedi, and Hiren Rana. "Power Augmentation of Gas Turbine Using Exhaust Flue Gas Operated Vapor Absorption Machine." International Research Journal on Advanced Engineering Hub (IRJAEH) 2, no. 05 (2024): 1318–26. http://dx.doi.org/10.47392/irjaeh.2024.0182.

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Industrial gas turbines (GT) that operate at constant speed are constant-volume-flow combustion machines. As the specific volume of air is directly proportional to the temperature, an increase in air density results in a higher air mass flow rate at low air ambient temperatures. This results more mass of air is now passes through same volume gas turbine space. Consequently, the gas turbine power output increases proportionally with the increase in air mass flow rate. For geographic regions where warm and humid months are predominant throughout the year, significant power loss occurs during the

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26

Vicatos, George, and E. Krafft. "Comparison between two different solution-pumping methods in absorption refrigeration machines." Journal of Energy in Southern Africa 21, no. 3 (2010): 16–22. http://dx.doi.org/10.17159/2413-3051/2010/v21i3a3257.

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This paper presents a pumping method in absorp-tion refrigeration where a vapour-driven pump is to replace the electricity-driven pump. The vapour pump is driven by a fraction of the generator’s hot, high-pressure, vapour mixture. The refrigerator is thus exclusively heat-powered and rendered inde-pendent of the availability of electricity as the main energy source. The design and operation of the vapour pump is presented. The results obtained by a computer simulation program show a decrease in performance (COP), which is confirmed by the data obtained from a 1 kW cooling capacity refrigerator

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27

Stepanov, K. I., D. G. Mukhin, S. V. Alekseenko, and O. V. Volkova. "Experimental study of negative temperatures in lithium-bromide absorption refrigerating machines." Thermophysics and Aeromechanics 22, no. 4 (2015): 481–89. http://dx.doi.org/10.1134/s0869864315040095.

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28

MOROSUK, T., and G. TSATSARONIS. "A new approach to the exergy analysis of absorption refrigeration machines." Energy 33, no. 6 (2008): 890–907. http://dx.doi.org/10.1016/j.energy.2007.09.012.

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29

Osadchuk, Eugeniy, and Oleksandr Titlov. "ANALYSIS OF THE CLIMATIC FEATURES OF THE REGIONS OF THE PRIMARY APPLICATION OF THE SYSTEMS FOR PRODUCING WATER FROM THE ATMOSPHERIC AIR." ScienceRise 4 (August 31, 2020): 3–9. http://dx.doi.org/10.21303/2313-8416.2020.001390.

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The object of research is the thermal and humidity processes occurring during artificial cooling of atmospheric air to the dew point temperature in the evaporators of refrigeration machines of the compression and absorption type. This study solves the problem of finding energy efficient heat and humidity modes for cooling atmospheric air to the dew point temperature in regions with a shortage of water resources and high solar installations. It is shown that practically in all considered climatic zones with a shortage of water resources, the process of obtaining water from atmospheric air is mo

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30

Ab Ghani, Mohd Hafizuddin, and Sahrim Ahmad. "The Comparison of Water Absorption Analysis between Counterrotating and Corotating Twin-Screw Extruders with Different Antioxidants Content in Wood Plastic Composites." Advances in Materials Science and Engineering 2011 (2011): 1–4. http://dx.doi.org/10.1155/2011/406284.

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Water absorption is a major concern for natural fibers as reinforcement in wood plastic composites (WPCs). This paper presents a study on the comparison analysis of water absorption between two types of twin-screw extruders, namely, counterrotating and corotating with presence of variable antioxidants content. Composites of mixed fibres between rice husk and saw dust with recycled high-density polyethylene (rHDPE) were prepared with two different extruder machines, namely, counterrotating and corotating twin screw, respectively. The contents of matrix (30 wt%) and fibres (62 wt%) were mixed wi

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31

Anagha, Pathak, Deshpande Kiran, Kurhe Niranjan, Baste Pravin, and Jadkar Sandesh. "Comfort Cooling Application Using Fixed Focus Solar Parabolic Dish Concentrator Integrated with Double Effect Vapor Absorption Machine." International Research Journal of Engineering and Technology (IRJET) Volume: 05 Issue: 03 | Mar-2018, Issue: 03 (2019): 6. https://doi.org/10.5281/zenodo.2599681.

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Comfort cooling using solar energy can be done using two types of technologies viz; vapor compression machines (VCM) operating on electricity and vapor absorption machine (VAM) operating on thermal heat. Both technologies are used in industrial process and commercial establishments. In present article, the utilization of solar thermal energy for cooling purpose in commercial and industrial establishments has been discussed. A complete case study based on integration of solar thermal energy system for cooling with the existing system has been studied along with its performance evaluation. Among

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32

Eugeniy, Osadchuk, and Titlov Oleksandr. "ANALYSIS OF THE CLIMATIC FEATURES OF THE REGIONS OF THE PRIMARY APPLICATION OF THE SYSTEMS FOR PRODUCING WATER FROM THE ATMOSPHERIC AIR." ScienceRise, no. 4 (August 31, 2020): 3–9. https://doi.org/10.21303/2313-8416.2020.001390.

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<strong>The object</strong> of research is the thermal and humidity processes occurring during artificial cooling of atmospheric air to the dew point temperature in the evaporators of refrigeration machines of the compression and absorption type. <strong>This study solves the problem</strong> of finding energy efficient heat and humidity modes for cooling atmospheric air to the dew point temperature in regions with a shortage of water resources and high solar installations. It is shown that practically in all considered climatic zones with a shortage of water resources, the process o

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33

Thioye, Massamba. "Amélioration de la performance des machines frigorifiques á absorption par l'utilisation de cycles à absorption et désorption étagés." International Journal of Refrigeration 20, no. 2 (1997): 136–45. http://dx.doi.org/10.1016/s0140-7007(96)00058-8.

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34

Suárez López, María-José, Jesús-Ignacio Prieto, Eduardo Blanco, and David García. "Tests of an Absorption Cooling Machine at the Gijón Solar Cooling Laboratory." Energies 13, no. 15 (2020): 3962. http://dx.doi.org/10.3390/en13153962.

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Final energy consumption in the residential sector is increasing, even in countries with favourable climate conditions and technological capacity to promote the use of renewable resources and energy efficiency. Air conditioning systems based on absorption cycles are common solutions in solar assisted installations. In this paper, the main characteristics of the Gijón Solar Cooling Laboratory (GSCL) are summarized, showing its ability to test cooling machines with a variety of heat sources and sinks, as well as different technologies and strategies. An absorption machine with internal energy st

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35

Осадчук, Євген, Наталія Біленко та Олександр Тітлов. "ПІДВИЩЕННЯ ЕНЕРГЕТИЧНОЇ ЕФЕКТИВНОСТІ СИСТЕМ ОТРИМАННЯ ВОДИ З АТМОСФЕРНОГО ПОВІТРЯ З ВИКОРИСТАННЯМ СОНЯЧНОЇ ТЕПЛОВОЇ ЕНЕРГЕІЇ". European Science, sge16-02 (30 січня 2023): 79–116. http://dx.doi.org/10.30890/2709-2313.2023-16-02-028.

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An analysis of existing systems for obtaining water from atmospheric air was carried out. The prospects of creating systems for obtaining water from atmospheric air on the basis of absorption water-ammonia refrigerating machines and solar collectors with

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36

M. Sugiri, Indra Widarmadi, and Parman Sinaga. "Performance analysis of refrigeration system with 1 pk compressor based on evaporator temperature variation." JTTM : Jurnal Terapan Teknik Mesin 6, no. 1 (2025): 137–44. https://doi.org/10.37373/jttm.v6i1.1566.

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Refrigeration machines or also called cooling machines are machines that can cause the refrigeration effect, while refrigerants are substances used as working fluids in the heat absorption process. Refrigeration is a process of absorbing heat from a substance or product so that its temperature is below the ambient temperature. The purpose of the study was to analyze the performance of the refrigeration machine and the research method used was the experimental method by testing a 1 PK cooling machine using R134a refrigerant with temperature variations in the evaporator room. The results of this

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37

Bogatyreva, E. V. "Systems approach to modeling recycling refrigeration machines." Transactions of the Krylov State Research Centre S-I, no. 1 (2021): 130–31. http://dx.doi.org/10.24937/2542-2324-2021-1-s-i-130-131.

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Refrigeration equipment is not provided on many small fishing vessel projects. It is proposed to install absorption refrigerating machines (ABRM) as refrigeration units for small vessels of the fishing fleet, the working medium of which is a water ammonia mixture. Such machines can operate by using the heat of exhaust gases, that is, receive energy from internal combustion engines. Ship power plants, unlike stationary ones, have characteristics and properties inherent only to them. In modeling, it is proposed to use a systematic approach to optimize the parameters. The principle of a systemati

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38

Siri, Dharmapuri, Tuti Sandhya, Sakshi Pandey, et al. "Carbon Capture and Storage Optimization with Machine Learning." E3S Web of Conferences 581 (2024): 01003. http://dx.doi.org/10.1051/e3sconf/202458101003.

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This study examines the potential for enhancing carbon capture and storage (CCS) processes by machine learning to markedly improve performance across diverse capture methods, including as absorption, adsorption, membrane separation, and cryogenic distillation. Through the systematic adjustment of critical operating parameters, including temperature, pressure, flow rates, and sorbent characteristics using machine learning algorithms, we saw significant improvements in CO₂ collection efficiency. The use of optimum operating parameters, namely a temperature range of 40-60°C for absorption and a p

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39

Malinina, O. S., and A. V. Baranenko. "Efficiency comparison of thermodynamic cycles of lithium bromide-water absorption refrigeration machines." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 4, no. 2 (2020): 27–36. http://dx.doi.org/10.25206/2588-0373-2020-4-2-27-36.

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40

Zhao Shusen, 赵树森, 陈思嘉 Chen Sijia, and 沈京玲 Shen Jingling. "Identification of Terahertz Absorption Spectra of Illicit Drugs Using Support Vector Machines." Chinese Journal of Lasers 36, no. 3 (2009): 752–57. http://dx.doi.org/10.3788/cjl20093603.0752.

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41

Széles, Levente, Richárd Horváth, and Livija Cveticanin. "Research on Auxetic Lattice Structure for Impact Absorption in Machines and Mechanisms." Mathematics 12, no. 13 (2024): 1983. http://dx.doi.org/10.3390/math12131983.

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In this paper, a new type of filled doubly re-entrant auxetic lattice structure for application in damping and energy absorption devices is considered. The structure is modeled to give protection for machines and mechanisms of intensive impact. The suggested structure is the modified version of the auxetic one with silicone fillings. The unit of the structure is assumed as a re-entrant hexagon with four quadrangular absorbers. For the assumed model of unit, the deformation properties and the Poisson’s ratio were computed. The obtained results were experimentally tested. Specimens of filled and

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42

Lecuona-Neumann, Antonio, Antonio Famiglietti, and Mathieu Legrand. "Theoretical study of direct vapor generation for energy integrated solar absorption machines." Renewable Energy 135 (May 2019): 1335–53. http://dx.doi.org/10.1016/j.renene.2018.09.056.

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43

Rusowicz, Artur. "The mathematical modelling of the absorption refrigeration machines used in energy systems." CHŁODNICTWO 1, no. 2 (2018): 38–42. http://dx.doi.org/10.15199/8.2018.2.4.

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44

Shelgunov, A. V. "Comparative analysis of stand-alone co-generation and tri-generation energy centres." Power and Autonomous equipment 2, no. 3 (2019): 129–40. http://dx.doi.org/10.32464/2618-8716-2019-2-3-129-140.

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Introduction: presently, versatile stand-alone sources of electric energy serve as vehicles used to solve the problem of electric energy delivery to remote customers and to reduce substantial energy losses in the process of its delivery. The main principles underlying energy centres encompass generation, co-generation, and tri-generation.Methods: the author has performed a comparative analysis of the energy centres in operation on different principles. As for electric energy generation, the author has analyzed gas-reciprocating units consuming natural gas as the most economical fuel. The proce

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45

Gerry, Matthew, Na’im Kalantar, and Dvira Segal. "Bounds on fluctuations for ensembles of quantum thermal machines." Journal of Physics A: Mathematical and Theoretical 55, no. 10 (2022): 104005. http://dx.doi.org/10.1088/1751-8121/ac4c10.

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Abstract We study universal aspects of fluctuations in an ensemble of noninteracting continuous quantum thermal machines in the steady-state limit, beyond linear response. Considering an individual machine, such as a refrigerator, in which relative fluctuations (and high order cumulants) of the cooling heat current to the absorbed heat current, η (n), are upper-bounded, η ( n ) ⩽ η C n with n ⩾ 2 and η C the Carnot efficiency, we prove that an ensemble of N distinct machines similarly satisfies this upper bound on the relative fluctuations of the ensemble, η N ( n ) ⩽ η C n . For an ensemble o

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46

Sioud, Doniazed, Raoudha Garma, and Ahmed Bellagi. "Thermodynamic Analysis of a Solar Combined Ejector Absorption Cooling System." Journal of Engineering 2018 (November 11, 2018): 1–12. http://dx.doi.org/10.1155/2018/7090524.

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The objective of this paper is to investigate theoretically a solar driven 60 kW absorption cooling system. The system is constituted of a combined ejector single-effect absorption cycle coupled with a linear Fresnel solar concentrator and using water/lithium bromide as working fluid. The combined ejector single-effect absorption cycle exhibits high performances, almost equal to that of double-effect absorption device. However, higher driving heat temperatures are required than in the case of conventional single-effect machines. A mathematical model is set up to analyze the optical performance

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Grzebielec, Andrzej, and Artur Rusowicz. "Analysis of the use of adsorption processes in trigeneration systems." Archives of Thermodynamics 34, no. 4 (2013): 35–49. http://dx.doi.org/10.2478/aoter-2013-0028.

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Abstract The trigeneration systems for production of cold use sorption refrigeration machines: absorption and adsorption types. Absorption systems are characterized namely by better cooling coefficient of performance, while the adsorptive systems are characterized by the ability to operate at lower temperatures. The driving heat source temperature can be as low as 60-70 °C. Such temperature of the driving heat source allows to use them in district heating systems. The article focuses on the presentation of the research results on the adsorption devices designed to work in trigeneration systems

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Радченко, Андрій Миколайович, Дмитро Вікторович Коновалов, Сергій Георгійович Фордуй, Роман Миколайович Радченко, Сергій Анатолійович Кантор та Віктор Павлович Халдобін. "Аналіз ефективності ежекторних холодильних машин на різних холодоагентах". Aerospace technic and technology, № 4 (27 серпня 2021): 40–47. http://dx.doi.org/10.32620/aktt.2021.4.06.

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Modern heat-using ejector refrigeration machines used in heat recovery systems for power plants based on gas turbine engines and internal combustion engines have many advantages over absorption refrigeration machines: smaller dimensions and weight; the ability to obtain lower temperatures. However, they are inferior in energy efficiency, and the thermal coefficient is much lower and can be 0.2…0.4. The efficiency of such refrigeration machines largely depends on the choice of the working fluid (refrigerant). Hence the need to choose a refrigerant that would provide the maximum heat factor, and

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Jeong, Ho-Jung, Chang-Ju Park, Kihyun Kim, and Yangkyu Park. "Discrimination of Explosive Residues by Standoff Sensing Using Anodic Aluminum Oxide Microcantilever Laser Absorption Spectroscopy with Kernel-Based Machine Learning." Sensors 24, no. 18 (2024): 5867. http://dx.doi.org/10.3390/s24185867.

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Standoff laser absorption spectroscopy (LAS) has attracted considerable interest across many applications for environmental safety. Herein, we propose an anodic aluminum oxide (AAO) microcantilever LAS combined with machine learning (ML) for sensitive and selective standoff discrimination of explosive residues. A nanoporous AAO microcantilever with a thickness of <1 μm was fabricated using a micromachining process; its spring constant (18.95 mN/m) was approximately one-third of that of a typical Si microcantilever (53.41 mN/m) with the same dimensions. The standoff infrared (IR) spectra of

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Krasnov, A. V. "About One of the Approaches to Forecasting and Increasing Noise Absorption in the Cabins of Transport and Technological Machines." Occupational Safety in Industry, no. 11 (November 2023): 84–89. http://dx.doi.org/10.24000/0409-2961-2023-11-84-89.

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Noise is one of the main harmful production factors in the mining industry. The results of a hygienic assessment of working conditions indicate that exceeding the maximum permissible noise levels in 50 % of cases is recorded at the workplaces of drivers of the transport and technological machines. One of the efficient measures to reduce medium- and high-frequency noise in the cabins of transport and technological machines is the use of noise-absorbing upholsteries mounted on their metal panels. The article presents a computational and experimental procedure based on determining the reverberati

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