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Relevant bibliographies by topics / Heat of sorption

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Academic literature on the topic 'Heat of sorption'

Author: Grafiati

Published: 11 February 2023

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Journal articles on the topic "Heat of sorption"

1

Huang, Yuxiang, Ru Liu, Fandan Meng, Yanglun Yu, and Wenji Yu. "The Influence of Heat Treatment on the Static and Dynamic Sorptive Behavior of Moso Bamboo (Phyllostachys pubescens)." Advances in Polymer Technology 2019 (May 2, 2019): 1–7. http://dx.doi.org/10.1155/2019/4949786.

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The influence of heat treatment on moisture sorption behavior of moso bamboo (Phyllostachys pubescens), especially under dynamic sorption conditions, was investigated. Moso bamboo was heated to 180 and 200°C for 8 h to investigate the chemical components and sorptive behavior at sinusoidal relative humidity (RH) and constant humidity. The results of chemical components revealed that the content of holocellulose,α-cellulose, and hemicellulose decreased while that of lignin increased slightly with increasing treatment temperatures. The results of static adsorption at constant RH showed that 200°C treated bamboo exhibited the lowest moisture content and moisture sorption coefficient. The results of dynamic sorptive behavior indicated that the moisture content changed sinusoidally but lagged behind the triggering sinusoidal RH changes. Heat-treated bamboo presented greater phase lag and smaller amplitudes of moisture content and sorption hysteresis due to the hemicellulose removal.

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Štencl, Jiří. "Effect of temperature and water activity on heat transfer in parsley leaves in the range of temperatures 10–30 °C." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 55, no. 5 (2007): 181–86. http://dx.doi.org/10.11118/actaun200755050181.

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The equilibrium moisture contents of parsley leaves were measured by the gravimetric dynamic method with continuous recording of changes in sample weight. Consequently water activity values were determined. Henderson equation was found to be a good model both for moisture adsorption and desorption. Isosteric heat of sorption was defined and determined in the temperature range of 10–30 °C. Clausius-Clapeyron equation was used to calculate the isosteric heat of sorption since no dependence on temperature in the analysed range was observed. The isosteric heats of sorption (qnst) were indicated graphic in the form qnst versus moisture content. Values for isosteric heat of sorption ranged from 54.41 to 46.85 kJ/mol.

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Morawetz, Ernst. "Sorption-compression heat pumps." International Journal of Energy Research 13, no. 1 (1989): 83–102. http://dx.doi.org/10.1002/er.4440130109.

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Hossain, M. D., B. K. Bala, M. A. Hossain, and M. R. A. Mondol. "Sorption isotherms and heat of sorption of pineapple." Journal of Food Engineering 48, no. 2 (May 2001): 103–7. http://dx.doi.org/10.1016/s0260-8774(00)00132-1.

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Quirijns, Elisabeth J., Anton JB van Boxtel, Wilko KP van Loon, and Gerrit van Straten. "Sorption isotherms, GAB parameters and isosteric heat of sorption." Journal of the Science of Food and Agriculture 85, no. 11 (2005): 1805–14. http://dx.doi.org/10.1002/jsfa.2140.

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Vega-Gálvez, A., R. Lemus-Mondaca, P. Fito, and A. Andrés. "Note: Moisture Sorption Isotherms and Isosteric Heat of Red Bell Pepper (var. Lamuyo)." Food Science and Technology International 13, no. 4 (August 2007): 309–16. http://dx.doi.org/10.1177/1082013207082530.

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Sorption isotherms of red pepper (var. Lamuyo) were determined at three temperatures (10, 20 and 30°C) in a range of water activity from 0.10 to 0.96. BET, GAB, Halsey, Herderson, Caurie, Smith, Oswin and Iglesias—Chirife equations were tested for modelling the sorption isotherms. The statistical evaluation of fit quality of the preceding models showed good results using the BET, GAB, Halsey and Iglesias—Chirife models on experimental sorption data. The BET and GAB models showed monolayer moisture contents from 0.07 to 0.10 g water/g (d.b.); however, they did not show direct dependence on temperature. The Clausius—Clapeyron equation satisfactorily determined the sorption isosteric heats, which were found to increase as the moisture content decreased; the desorption heat (74.2kJ/mol) was higher than that of adsorption heat (36.9kJ/mol). The preceding experimental data showed a good quality fit when evaluated with the Tsami equation.

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Mulet, A., J. Garcia-Reverter, R. Sanjuan, and J. Bon. "Sorption Isosteric Heat Determination by Thermal Analysis and Sorption Isotherms." Journal of Food Science 64, no. 1 (January 1999): 64–68. http://dx.doi.org/10.1111/j.1365-2621.1999.tb09862.x.

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Chen, Chiachung. "Obtaining the isosteric sorption heat directly by sorption isotherm equations." Journal of Food Engineering 74, no. 2 (May 2006): 178–85. http://dx.doi.org/10.1016/j.jfoodeng.2005.01.041.

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Nopens, Wadsö, Ortmann, Fröba, and Krause. "Measuring the Heat of Interaction between Lignocellulosic Materials and Water." Forests 10, no. 8 (August 9, 2019): 674. http://dx.doi.org/10.3390/f10080674.

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Research Highlights: When investigating the sorption of water on lignocellulosic materials, the sorption or mixing enthalpy is an interesting parameter that, together with the sorption isotherms commonly measured, can be used to characterize and understand the sorption process. We have compared different methods to assess these enthalpies. Additionally, we propose a sorption nomenclature. Background and Objectives: Sorption enthalpies are non-trivial to measure. We have, for the first time, measured sorption enthalpies on the same materials with four different methods, to be able to compare the method’s strengths and weaknesses. Materials and Methods: The following four methods were used on beech and Scots pine wood: isosteric heat, solution calorimetry, sorption calorimetry, and RH perfusion calorimetry. Results: The results for beech and pine were similar, and were in general agreement with the literature. We do not recommend one of the methods over the others, as they are quite different, and they can therefore be used to elucidate different aspects of the interactions between water and, for example, novel biobased materials (modified woods, cellulose derivatives, and regenerated cellulose).

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Chayjan, R. A., and M. Esna-Ashari. "Modeling of heat and entropy sorption of maize (cv. Sc704): neural network method." Research in Agricultural Engineering 56, No. 2 (June 7, 2010): 69–76. http://dx.doi.org/10.17221/37/2009-rae.

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Equilibrium moisture content of maize affects its values of dehydration heat and entropy. Precise prediction of heat and entropy with regard to its equilibrium moisture content is a simple and fast method for proper estimation of energy required for dehydration of maize and simulation of dried maize storage. Artificial neural network and thermodynamic equations for computation of maize heat and entropy of sorption were used, as a new method. The artificial neural network method for prediction of the equilibrium moisture content of maize was utilized. The heat of sorption of maize is predicted by a power model. After well training of equilibrium moisture content data sets using the artificial neural network models, predictive power of the model was found to be high (R<sup>2</sup> = 0.99). A power regression model was also developed for entropy of sorption. At moisture content above 11% (d.b.) the heat and entropy of sorption of maize decreased smoothly and they were highest at moisture content about 8% (d.b.).

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Dissertations / Theses on the topic "Heat of sorption"

1

Schawe, Dirk. "Theoretical and experimental investigations of an adsorption heat pump with heat transfer between two adsorbers." [S.l. : s.n.], 2001. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB8962132.

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Lanzuela, de Alvaro Francisco. "Design and evaluation of a novel solid sorption heat pump." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312353.

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González, Morales César Augusto. "CHARACTERIZATION OF HEAT TRANSFER AND EVAPORATIVE COOLING OF HEAT EXCHANGERS FOR SORPTION BASED SOLAR COOLING APPLICATIONS." Thesis, KTH, Kraft- och värmeteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-129165.

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The content of this Master thesis is the characterization of three different cross unmixed flow heat exchangers. All of the heat exchangers have different inner geometries and dimensions. In order to perform the characterization of these heat exchangers, measurements of heat transfer were done under different conditions: five different temperatures at the inlet of the sorption side, different mass flow for both inlet sides of the heat exchangers.The heat transfer measurements were done with and without applying indirect evaporative cooling in order to find out the influence of indirect evaporative cooling. This research was done with the objective to find out which heat exchanger presents the best performance. The purpose is to install the heat exchanger in the novel solar driven open air SorLuKo system. This system was developed in Fraunhofer ISE and works under the same principe as the ECOS system. The main objective of the SorLuKo system is to dehumidify and cool a dwelling or small office.

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Thorpe, Roger. "Heat transfer by forced convection in beds of granular adsorbent material for solid sorption heat pumps." Thesis, University of Warwick, 1996. http://wrap.warwick.ac.uk/34618/.

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A novel adsorption cycle in which enhanced heat transfer between the adsorbent and external heat sinks and sources is achieved by forced convection of refrigerant gas through the adsorbent bed is presented This cycle is further developed by the use of inert beds to store the heat of desorption and sensible heat between phases. The performance and utility of such a cycle will depend on the heat transfer coefficients and pressure drops that result when the refrigerant gas is circulated through the beds The heat transfer and pressure drop characteristics of a bed of granular active carbon were investigated using argon, carbon dioxide and ammonia. Equipment was designed and built to pass a stream of gas through a bed at a controlled rate, pressure and temperature. The pressure drop characteristic was found to conform to Ergun equation and the constants for the application of that relation to a commonly available granular active carbon established. A mathematical model based on a finite difference technique was created and used to predict the progress of a temperature front in the bed and derive the heat transfer characteristics from experimental data. Heat transfer coefficients measured with argon and ammonia appeared inconsistent with each other and after investigations of the data and comparison with established correlations were made it was concluded that carbon during the argon experiments had been contaminated. The heat transfer results with ammonia and carbon were compared with a modified version of the Colburn analogy between heat transfer and pressure loss. A correlation between the Nusselt number and Reynolds number for design purposes was established.

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Ellis, Michael Wayne. "An evaluation of the effect of adsorbent properties on the performance of a solid sorption heat pump." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/17835.

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Blackman, Corey. "Investigation of the performance of individual sorption components of a novel thermally driven heat pump for solar applications." Thesis, KTH, Tillämpad termodynamik och kylteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149877.

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An enhanced-modularity thermally driven chemical heat pump was conceptualised as a second generation product for various heating and cooling applications with special emphasis on solar applications. The typical characteristics of the absorption heat pump were studied and the key performance parameters were selected for further investigation. An experimental test rig was constructed to allow for the testing of each component’s performance characteristics with special attention being paid to the ability to interchange components to test various configurations as well as to the facilitation of standardised relatively rapid testing. The heat transfer coefficient of the condenser/evaporator was found to be between 260 and 300 W/m2-°C during evaporation and between 130 and 170 W/m2-°C during condensation. Salt type has major impact on the system’s cooling power and cooling energy with the LiBr and water sorption pair having a 62% higher cooling/heating power than LiCl with the same matrix type and thickness. Matrix types and sorption pairs were compared with regards to the principal parameters of power and energy density with results ranging from 60 to 163 Wh/litre. The final section of the study tackled the theoretical foundation behind the system processes with modelling and simulation of the processes and comparison with the experimental data. The model makes the foundation of the continuous development of a more detailed and accurate physical model to enhance the design and optimisation process of the system.

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Segerholm, Kristoffer. "Wood Plastic Composites made from Modified Wood : Aspects on Moisture Sorption, Micromorphology and Durability." Licentiate thesis, Stockholm : Div. of Bulding Materials, Dept. of Civil and Architecturel Engineering, School of Architecture and the Built Environment, Royal Institute of Technlogy (KTH), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4582.

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Jabbari-Hichri, Amira. "Stockage thermochimique de la chaleur : étude de la sorption d’eau par différents matériaux." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10300.

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Le défi énergétique imposé par l’épuisement des énergies fossiles d’une part et par leur consommation croissante d’autre part, a favorisé l’apparition d’une gestion optimale de l’énergie basée sur l’utilisation de ressources propres et renouvelables telles que l’énergie solaire. Le secteur du bâtiment est le principal consommateur d’énergie. Une grande partie de cette énergie est consommée par les systèmes de chauffage. Par conséquent, une bonne gestion peut être réalisée grâce à l’utilisation des technologies de stockage thermochimique d’énergie. L’avantage principal d’utiliser ce type de système est la possibilité de stocker de la chaleur pendant la période de disponibilité maximale du rayonnement solaire, en été (étape de déshydratation) et la libérer pour chauffer une maison pendant la période hivernale (étape d’hydratation). L’amélioration des propriétés d’adsorption des matériaux pour le stockage thermochimique de la chaleur est l’objectif principal de ce travail. L’utilisation d’adsorbants poreux tels que les zéolithes dans le domaine du stockage saisonnier de la chaleur s’avère être une solution intéressante pour la réduction de la consommation d’énergie. Par ailleurs, le développement de nouveaux matériaux composites à base d’hydrate de sel a été étudié pour améliorer les capacités de stockage à la fois des matrices mésoporeuses et des hydrates salins. Une comparaison entre les différentes séries de matériaux de stockage thermochimiques sélectionnés et synthétisés a été réalisée, concernant l’impact de la nature et de la quantité de sel ajouté et des propriétés physicochimiques des matériaux poreux sur leurs densités de stockage de chaleur et leurs capacités de sorption d’eau. Afin de mieux comprendre le comportement d’adsorption-désorption, les différents types de matériaux de stockage sélectionnés ont été caractérisés d’un point de vue structural et textural en utilisant des techniques appropriées et par adsorption de la vapeur d’eau en utilisant un analyseur thermique TG-DSC 111 de Setaram. Des cycles successifs d’hydratation (à 20°C) / déshydratation (à 150°C) ont été effectués
The energy challenge imposed by exhaustion of fossil fuels and their increasing consumption has favored the emergence of optimal energy management based on the use of alternative resources such as solar energy. The household sector is the main consumer of energy. A large part of this energy is consumed by heating systems. Therefore, good management can be achieved through the use of thermochemical energy storage technology. The main advantage to use this type of system is the possibility to store heat during the maximum availability of solar radiation in summer (dehydration step) and release the energy on demand for heating houses in winter (hydration step). The improvement of the adsorption properties of materials for thermochemical heat storage is the main objective of this work. The use of porous adsorbents such as zeolites in the field of seasonal heat storage is an attractive solution for the reducing of energy consumption. On the other hand, the development of new composite materials based on hydrate salt is made to improve the heat storage capacities of both pure mesoporous host matrix and hydrate salt. A comparison among different series of thermochemical storage materials selected and synthesized was done by analyzing the impact of salt addition and physico-chemical properties of porous materials on the heat storage and water sorption performances. In order to understand the adsorption-desorption behavior, different kinds of materials were characterized in their structural, textural and surface properties by using appropriate techniques and by adsorption of water vapor using a Setaram TG-DSC 111 apparatus. Successive cycles of hydration (at 20°C) / dehydration (at 150 °C) were performed

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Blackman, Corey. "Evaluation of a Modular Thermally Driven Heat Pump for Solar Heating and Cooling Applications." Licentiate thesis, Mälardalens högskola, Framtidens energi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:du-20321.

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Exploiting solar energy technology for both heating and cooling purposes has the potential of meeting an appreciable portion of the energy demand in buildings throughout the year. By developing an integrated, multi-purpose solar energy system, that can operate all twelve months of the year, a high utilisation factor can be achieved which translates to more economical systems. However, there are still some techno-economic barriers to the general commercialisation and market penetration of such technologies. These are associated with high system and installation costs, significant system complexity, and lack of knowledge of system implementation and expected performance. A sorption heat pump module that can be integrated directly into a solar thermal collector has thus been developed in order to tackle the aforementioned market barriers. This has been designed for the development of cost-effective pre-engineered solar energy system kits that can provide both heating and cooling. This thesis summarises the characterisation studies of the operation of individual sorption modules, sorption module integrated solar collectors and a full solar heating and cooling system employing sorption module integrated collectors. Key performance indicators for the individual sorption modules showed cooling delivery for 6 hours at an average power of 40 W and a temperature lift of 21°C. Upon integration of the sorption modules into a solar collector, measured solar radiation energy to cooling energy conversion efficiencies (solar cooling COP) were between 0.10 and 0.25 with average cooling powers between 90 and 200 W/m2 collector aperture area. Further investigations of the sorption module integrated collectors implementation in a full solar heating and cooling system yielded electrical cooling COP ranging from 1.7 to 12.6 with an average of 10.6 for the test period. Additionally, simulations were performed to determine system energy and cost saving potential for various system sizes over a full year of operation for a 140 m2 single-family dwelling located in Madrid, Spain. Simulations yielded an annual solar fraction of 42% and potential cost savings of €386 per annum for a solar heating and cooling installation employing 20m2 of sorption integrated collectors.

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Nonnen, Thomas. "Salz/Zeolith-Komposite für die Sorptionswärmespeicherung." Doctoral thesis, Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-207636.

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Zeolithgranulate sind etablierte Materialien für die Speicherung von Wärme mittels Wassersorption. Eine Erhöhung der Wärmespeicherdichte des Granulats ist durch Kombination mit hygroskopischen Salzen wie Calciumchlorid, Magnesiumchlorid oder Magnesiumsulfat möglich. In der vorliegenden Dissertation wird gezeigt, dass die Wär-mespeichereigenschaften derartiger Komposite von der Deliqueszenzluftfeuchte des Salzes, von der Salzbeladung und von der Luftfeuchte bei der Wassersorption abhängen. Liegt die Luftfeuchte unterhalb der Deliqueszenzluftfeuchte des Salzes, so nehmen Was-serbeladungshub, Wärmespeicherdichte und thermische Leistung mit steigender Salz-beladung um bis zu 71 % ab. Dies wird darauf zurückgeführt, dass Salzionen in die Mik-roporen des Zeoliths inkludiert werden und das für die Wassersorption zur Verfügung stehende Volumen verringern. Unterhalb der Deliqueszenzluftfeuchte ist das einge-brachte Salz daher thermochemisch inaktiv. Oberhalb der Deliqueszenzluftfeuchte und oberhalb einer salz- und luftfeuchteabhängigen Mindestsalzbeladung kommt es zur Ausbildung einer Salzlösung im Sekundärporensystem des Granulats. Die Absorption von Wasserdampf in der Salzlösung führt gegenüber dem salzfreien Granulat zu einer Steigerung von Wasserbeladungshub und Wärmespeicherdichte um bis zu 53 %. Dies geht jedoch einher mit einer Verringerung der thermischen Leistung um bis zu 50 %. Die Hydratation von kristallinem Salz im Granulat spielt gegenüber Salzinklusion und Ausbildung der Salzlösung nur eine untergeordnete Rolle. Die aus den experimentellen Befunden abgeleiteten Erkenntnisse konnten in ein semiempirisches mathematisches Modell überführt werden, welches den Wasserbeladungshub der Komposite quantitativ beschreibt
Zeolite beads are established materials for the storage of heat by water sorption. An increase of the heat storage density of the beads is possible via the combination with hygroscopic salts. In this thesis it is shown, that the heat storage properties of compo-sites of this kind depend in a complex manner on the deliquescence humidity of the salt, on the salt loading, and on the humidity during water sorption. When the humidity is below the deliquescence humidity of the salt, water loading lift, heat storage density, and thermal power are reduced by up to 71 % with increasing salt content. This is at-tributed to the inclusion of salt into the micropores of the zeolite and the reduction of the volume available for the sorption of water. Thus, below the deliquescence humidity, the salt is thermochemically inactive. Above the deliquescence humidity and above a salt- and humidity-dependend minimum salt loading, a salt solution is formed in the secondary pore system of the beads. The absorption of water vapor in the salt solution gives rise to an increase of the water loading lift and of the heat storage density by up to 53 %, compared to the salt-free zeolite beads. However, this is accompanied by a reduc-tion of the thermal power output by up to 50 %. The hydration of crystalline salt in the beads is only of minor importance for the composites. The findings from the experi-mental work were transferred into a semi-empirical mathematical model, which de-scribes the water loading lift of the composites

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Books on the topic "Heat of sorption"

1

Bokelmann, H. Working fluids for sorption heat pumps. Luxembourg: Commission of the European Communities, 1986.

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Vasilʹev, L. L., and S. Kakaç. Heat pipes and solid sorption transformations: Fundamentals and practical applications. Boca Raton: CRC Press, Taylor & Francis Group, 2013.

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Figueroa, Isaac Pilatowsky. Cogeneration fuel cell-sorption air conditioning systems. London: Springer-Verlag, 2011.

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Figueroa, Isaac Pilatowsky. Cogeneration fuel cell-sorption air conditioning systems. London: Springer-Verlag, 2011.

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American Society of Heating, Refrigerating and Air-Conditioning Engineers. Absorption / sorption heat pumps and refrigerating systems: A collection of papers from the ASHRAE meetings at Atlanta, Georgia February 1996. Atlanta, ga: American Society of Heating, Refrigerating and Air-Conditioning Engineers, 1996.

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Shilyaev, Mihail, Elena Hromova, Aleksandr Bogomolov, A. Pavlenko, and V. Butov. Modeling of hydrodynamics and heat and mass transfer in dispersed media. ru: INFRA-M Academic Publishing LLC., 2022. http://dx.doi.org/10.12737/1865376.

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The monograph presents methods for calculating the dehydration of wet granular materials in industrial centrifuges, filter presses and vacuum filters under the influence of gravitational forces, as well as by purging the granular layer with dry air with elevated temperature; physical and mathematical models of gas absorption and the theory of capturing submicron dust by condensation in foam, centrifugal bubbling apparatus and hollow nozzle scrubbers, packing columns and tubular absorbers; physical and mathematical models of dry adsorption of gases in packing columns and flues by injecting a dispersed adsorbent into the flow are presented, a method for determining the phase equilibrium constants of sorption processes based on the developed models is proposed; physical and mathematical modeling and analysis of the combustion process of dispersed solid ash fuel in a four-stage cyclone gorenje is carried out. the furnace. It can be useful in the educational process for a number of specialties, in particular thermal power engineering, chemical-technological, metallurgical profiles, environmentalists, as well as for researchers and graduate students and in engineering practice.

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Heat Pipes and Solid Sorption Transformations: Fundamentals and Practical Applications. Taylor & Francis Group, 2013.

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Kakac, Sadik, and L. L. Vasiliev. Heat Pipes and Solid Sorption Transformations: Fundamentals and Practical Applications. Taylor & Francis Group, 2013.

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Heat Pipes and Solid Sorption Transformations: Fundamentals and Practical Applications. Taylor & Francis Group, 2017.

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Vasiliev, L. L. Heat Pipes and Solid Sorption Transformations: Fundamentals and Practical Applications. Taylor & Francis Group, 2013.

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Book chapters on the topic "Heat of sorption"

1

Piccirillo, L., G. Coppi, and A. May. "Heat Transfer." In Miniature Sorption Coolers, 39–60. Miniature sorption coolers : theory and applications / LucioPiccirillo, Gabriele Coppi, Andrew May.: CRC Press, 2018. http://dx.doi.org/10.1201/9781351188678-2.

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Vasiliev, L. L., and A. G. Kulakov. "Heat Pipe Applications in Sorption Refrigerators." In Low Temperature and Cryogenic Refrigeration, 401–14. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0099-4_23.

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Vasiliev, L. "Sorption Heat Pipe — A New Device for Thermal Control and Active Cooling." In Microscale Heat Transfer Fundamentals and Applications, 465–77. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3361-3_25.

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Holcroft, Neal, and Andy Shea. "Heat of Sorption and Moisture Buffering Properties of Building Insulation Materials." In InCIEC 2013, 649–61. Singapore: Springer Singapore, 2014. http://dx.doi.org/10.1007/978-981-4585-02-6_56.

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Saha, Nabanita, Madhusweta Das, Dipali S. Shinde, Antonin Minařík, and Petr Saha. "Moisture Sorption Isotherm and Isosteric Heat of Sorption Characteristics of PVP-CMC Hydrogel Film: A Useful Food Packaging Material." In Polymers and Polymeric Composites: A Reference Series, 1–17. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76573-0_36-1.

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Saha, Nabanita, Madhusweta Das, Dipali S. Shinde, Antonin Minařík, and Petr Saha. "Moisture Sorption Isotherm and Isosteric Heat of Sorption Characteristics of PVP-CMC Hydrogel Film: A Useful Food Packaging Material." In Polymers and Polymeric Composites: A Reference Series, 1085–101. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-77830-3_36.

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Wang, Liwei, Guoliang An, Jiao Gao, and Ruzhu Wang. "Solid Sorption Cycle for Refrigeration, Water Production, Eliminating NOx Emission and Heat Transfer." In Property and Energy Conversion Technology of Solid Composite Sorbents, 129–227. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6088-4_5.

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Korpiun, P., and R. Osiander. "Photothermal Study of Heat Conduction, Diffusion, and Sorption in Thin Films and Porous Materials." In Photoacoustic and Photothermal Phenomena III, 619–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-540-47269-8_159.

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Seidel, T., M. Fink, T. Hutsch, and O. Andersen. "Open Porous Metal Fiber Structures for the Next Generation of Sorption-Driven Heat Pumps and Cooling Machines." In Proceedings of the 11th International Conference on Porous Metals and Metallic Foams (MetFoam 2019), 201–7. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42798-6_19.

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Sá, M. M., and A. M. Sereno. "Sorption Isotherms and Heats of Sorption for Fruit Jams." In Developments in Food Engineering, 182–84. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2674-2_53.

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Conference papers on the topic "Heat of sorption"

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Vasiliev, L. L., L. E. Kanonchik, A. A. Antux, A. G. Kulakov, and I. Rosin. "Waste Heat Driven Solid Sorption Coolers." In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1994. http://dx.doi.org/10.4271/941580.

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Collazos-Escobar, Gentil Andres, Nelson Gutiérrez-Guzmán, Henry Alexander Vaquiro-Herrera, and Erika Tatiana Cortes-Macias. "Modeling sorption isotherms and isosteric heat of sorption of roasted coffee beans." In 21st International Drying Symposium. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7668.

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The aim of this work was determine the sorption isotherms in roasted beans of specialty coffee at temperatures of 25, 30 and 40 °C and water activities between 0.1 and 0.8 using the dynamic dew point method. The experimental sorption data were modeled using 12 different equations to represent the dependence of equilibrium moisture content with aw and temperature. The net isosteric heat of sorption was determined from the experimental sorption data using the Clausius-Clapeyron equation. The Weibull model satisfactorily modeled the effect of the temperature on the hygroscopic equilibrium in roasted coffee beans (R2adj =0.902 and RMSE = 0.00550 kg·kg-1d.b.). The net isosteric heat of sorption increase with increased moisture content. Keywords: water activity; sorption properties; equilibrium moisture content; hygroscopicity

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Wang, R. Z., Z. Z. Xia, L. W. Wang, Z. S. Lu, S. L. Li, T. X. Li, J. Y. Wu, and S. He. "Heat Transfer Design in Adsorption Refrigeration Systems for Efficient Use of Low Grade Thermal Energy." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-23383.

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Adsorption refrigeration and heat pump systems have been considered as very important means for the efficient use of low grade thermal energy in the temperature range of 60–150°C. Sorption systems are merely heat exchanger based thermodynamic systems, and therefore a good design to optimize heat and mass transfer with reaction or sorption processes is very important for high performance of the systems. Studies on heat and mass transfer enhancement in adsorption beds have been done extensively. Notable techniques is whereby the adsorbent bed is fitted with finned heat exchanger embedded with adsorbent particles, or the adsorbent particles may be compressed and solidified and then coupled with finned tube or plate heat exchangers. The use of expanded graphite seems to be an effective method to improve both heat and mass transfer in the reaction bed. Studies have also shows the need to enhance the heat transfer in adsorption bed to match with the heat transfer of thermal fluids. Use of heat pipes and good thermal loop design could yield higher thermal performances of a sorption system, when coupled with adsorption beds to provide heating and cooling to the beds. A novel design with passive evaporation, known as rising film evaporation coupled with a gravity heat pipe was introduced for high cooling output. It has also been shown that heat and mass recovery in the internal sorption systems is critical, and novel arrangement of thermal fluid and refrigerant may result in high performance sorption systems. Based upon the above researches, various sorption systems have been developed, and high efficient performances have been reached. Typical sorption systems include (1) A silica gel-water adsorption water chillier with a COP about 0.55 when powered with 80°C hot water, (2) A CaCl2-ammonia adsorption refrigerator with a COP over 0.3 at −20 °C when powered with 120 °C water vapor, which has a specific cooling power about 600 W/kg-adsorbent. The above mentioned systems have shown that solid sorption systems have become market potential products, and low grade thermal energy, which is usually considered as waste heat, could be utilized to provide high grade cooling. This paper gives details of high efficient solid sorption systems recently developed, their heat transfer design, thermodynamic system coupling, and performance test results. Some examples of low grade thermal powered cooling systems are also presented.

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Daborer-Prado, Nayrana, Harald Kirchsteiger, and Bernhard Zettl. "Mathematical Modeling of Rotating Sorption Heat Storages." In ISES Solar World Congress 2019/IEA SHC International Conference on Solar Heating and Cooling for Buildings and Industry 2019. Freiburg, Germany: International Solar Energy Society, 2019. http://dx.doi.org/10.18086/swc.2019.22.01.

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Luna-Flores, Mario, Mariana Gisela Peña-Juarez, Angélica Mara Bello-Ramirez, Javier Telis-Romero, and Guadalupe Luna-Solano. "Moisture sorption isotherms and isosteric heat sorption of habanero pepper (Capsicum chínense) dehydrated powder." In 21st International Drying Symposium. Valencia: Universitat Politècnica València, 2018. http://dx.doi.org/10.4995/ids2018.2018.7637.

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Moisture sorption isotherms of the habanero pepper powder were determined using the Dynamic Vapor Sorption (DVS) method at 20, 25, 35, 45 and 55 °C in a range of water activity from 0.10 to 0.90 at which the processes of drying, packing and storage of habanero pepper are developed. The sorption capacity decreased with increasing temperature at a given water activity and the sorption isotherms showed a sigmoid form (Type II). The hysteresis phenomenon was observed in the sorption isotherms at all temperatures studied and it was more pronounced at temperatures high. The experimental sorption curves were fitting to the GAB, BET and Oswin models. It was concluded that the models that best describe the adsorption and desorption data for habanero pepper dehydrated powder were the GAB and Oswin models. The isosteric heat of water sorption was calculated with the moisture content data in equilibrium. The desorption isotherms present a higher isosteric heat in relation to the adsorption isotherms. In both, the isosteric heat decreased as the moisture content increased. Keywords: Habanero pepper dehydrated powder; Convective drying; Moisture sorption isotherms; Mathematic models

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Elgowainy, Amgad, Samuel Shelton, and James Hogan. "Performance Comparison of Heat-Driven and Electric-Driven Ammonia Heat Pump Systems." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56654.

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The objective of this study is to evaluate the solid sorption technology for residential cooling applications. The solid sorption technology uses natural gas as the primary energy source for compressing and circulating the refrigerant in the air-conditioning system. The system delivered 6.7 kW of cooling at 35°C outdoor temperature. The cooling gas COP was 0.32 at 27.8°C outdoor temperature. An ammonia vapor compression system was established and tested by operating a steady state mechanical compressor in place of the cyclic thermal compressor to evaluate and verify the cyclic performance of the sorption system. The system’s thermal compressor efficiency was almost one-third that of the mechanical compressor based on the input power of the primary energy source for each compressor. The testing revealed that the cooling capacity at the air handler is about 1.75 kW less than that at the ammonia/glycol evaporator chiller due to parasitic power gains.

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Lazarev, Dmitriy, Valeriy Artemov, Georgiy Yankov, and Konstantin Minko. "Numerical Simulation of Heat and Mass Transfer in Metal Hydride Hydrogen Accumulators of Different Complex Designs." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22561.

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A three-dimensional mathematical model of unsteady heat and mass transfer in porous hydrogen-absorbing media, accounting for presence of “passive” gas admixtures, is developed. New technique for evaluation of effective thermal conductivity of porous medium, which consists of microparticles, is suggested. Effect of “passive” gas admixtures on heat and mass transfer and sorption rate in metal hydride reactor is analyzed. It is shown that decrease of effective thermal conductivity and partial hydrogen pressure under decrease of hydrogen concentration effect on the hydrogen sorption rate considerably. It is disclosed that an intensive 3D natural convection takes place in a gas volume of reactor under certain conditions. Numerical analysis of heat and mass transfer in metal-hydride reactor of hydrogen accumulation systems was done. Sorption of hydrogen in cylindrical reactors with external cooling and central supply of hydrogen are analyzed including reactors with finned active volume and tube-shell reactor with external and internal cooling cartridge matrix. Unsteady three dimensional temperature and concentration fields in solid phase are presented. Integral curves representing the dynamic of sorption and desorption are calculated. Data on efficiency of considered reactors are presented and compared.

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An, Guoliang, Liwei Wang, and Y. Yu. "STUDY ON SOLID SORPTION HEAT PIPE USING HALIDE-AMMONIA WORKING PAIRS." In International Heat Transfer Conference 16. Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/ihtc16.her.022182.

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Rockenfeller, Uwe, Lance Kirol, and Kaveh Khalili. "High-Temperature Waste Heat Driven Cooling Using Sorption Media." In International Conference On Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1993. http://dx.doi.org/10.4271/932113.

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Estiot, E., S. Natzer, M. Harm, C. Kren, and S. Schweigler. "Heat Exchanger Development for Compact Water/LiBr Sorption Systems." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15871.

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For energy efficient tri-generation, solar cooling or residential heating compact sorption appliances using the working pair water/lithium bromide (LiBr) can be applied. Standard plant technology established in the field of large capacity chillers and heat pumps with conventional tube-and-shell configuration cannot be easily adapted to compact units for economic and operational reasons. For a successful marketing of compact sorption units, major effort is required to achieve tolerable plant dimensions and weight together with affordable first cost and reliable operation. In a research project, the design of all key components, i.e. main heat exchangers - evaporator, absorber, condenser and generator - and the liquid pumps for refrigerant and absorbent solution has been revised. In order to achieve uncomplicated manufacturing and improved vacuum tightness, concepts for standardized heat exchanger modules have been developed. A single effect absorption plant has been erected for the experimental investigation of the newly designed finned heat exchangers and plate heat exchanger configurations as main heat exchangers in an absorption cycle. Concepts for sizing these compact heat exchanger units in compliance with the given thermo-hydraulic conditions of a water/lithium bromide absorption cycle will be presented. Estimations of the wetting of the heat exchangers, the pressure drop in the vapor flow, as well as the achieved heat transfer per heat exchanger volume will be discussed. Experimental results for falling film absorption with compact heat exchangers will be presented.

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Reports on the topic "Heat of sorption"

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Kirol, Lance. Chill Storage and Heat-Activated Refrigeration Using Complex-Compound Sorption. Fort Belvoir, VA: Defense Technical Information Center, July 1999. http://dx.doi.org/10.21236/ada377844.

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Gibson, Phillip. Effect of Wool Components in Pile Fabrics on Water Vapor Sorption, Heat Release, and Humidity Buffering. Fort Belvoir, VA: Defense Technical Information Center, May 2008. http://dx.doi.org/10.21236/ada482235.

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Johnson, Justin. Fluorinated Covalent Organic Frameworks: A Novel Pathway to Enhance Hydrogen Sorption and Control Isosteric Heats of Adsorption; HyMARC Seed Project Final Report. Office of Scientific and Technical Information (OSTI), December 2020. http://dx.doi.org/10.2172/1735636.

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