International journal of refrigeration, Vol. 34 N° 4. International journal of refrigeration - Juin 2011
| Titre : | International journal of refrigeration, Vol. 34 N° 4. International journal of refrigeration - Juin 2011 |
| Type de document : | Bulletin |
| Paru le : | 08/09/2011 |
Dépouillements
Article : texte imprimé
Maxime Ducoulombier, Auteur ;
Stéphane Colasson, Auteur ;
Philippe Haberschill, Auteur
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The use of carbon dioxide as alternative refrigerant in refrigeration plants and heat pumps has been focused recently. Through the specific properties of CO2, the use of very compact heat exchangers is relevant and the technology of micro-channe[...]
Article : texte imprimé
Diogo L. da Silva, Auteur ;
Adriano F. Ronzoni, Auteur ;
Cláudio Melo, Auteur
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An experimental and theoretical study of the diabatic flow of carbon dioxide through lateral capillary tube suction line heat exchangers is outlined. The influence of both operating conditions (capillary tube inlet and outlet pressures, capillar[...]
Article : texte imprimé
Wei-Jiang Zhang, Auteur ;
Chun-Lu Zhang, Auteur
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This paper proposes a novel correlation-free on-line optimal control method for CO2 transcritical refrigeration systems. It uses the on-line correction formula to track the optimal pressure set point. As a critical advantage against the existing[...]
Article : texte imprimé
Ferdinando Mancini, Auteur ;
Silvia Minetto, Auteur ;
Ezio Fornasieri, Auteur
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Carbon dioxide is regarded as an optimal working fluid for heat pump dryers. The transcritical cycle well fits the closed-loop drying process which requires dehumidification and re-heating according to high temperature lift of the air stream.
I[...]
Article : texte imprimé
Christopher Goodman, Auteur ;
Brian M. Fronk, Auteur ;
Srinivas Garimella, Auteur
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An experimental and analytical study on the performance of carbon dioxide heat pumps for water heating was conducted. The performance of compact, microchannel, water-coupled gas coolers, evaporator, and suction line heat exchanger (SLHX) were ev[...]
Article : texte imprimé
Christopher Goodman, Auteur ;
Brian M. Fronk, Auteur ;
Srinivas Garimella, Auteur
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This paper presents the development of a transcritical CO2 heat pump water heating system model incorporating analytical heat exchanger models and an empirical compressor model. This study investigated the effects of a suction line heat exchange[...]
Article : texte imprimé
José-M. Corberán, Auteur ;
Israel Martínez-Galván, Auteur ;
Santiago Martínez-Ballester, Auteur
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This paper presents the results of a study carried out to elucidate the influence of the source and sink temperatures on the optimal charge of a propane water-to-water 16 kW heat pump which does not incorporate any liquid receiver. The unit had [...]
Article : texte imprimé
Youngju Joo, Auteur ;
Hoon Kang, Auteur ;
Jae Hwan Ahn, Auteur
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A simultaneous cooling and heating multi-heat pump can improve thermal comfort and energy efficiency through heat recovery at partial load conditions. The performance of a simultaneous heating and cooling multi-heat pump with four indoor units w[...]
Article : texte imprimé
Manuel Gräber, Auteur ;
Christian Kirches, Auteur ;
Hans Georg Bock, Auteur
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Adsorption refrigeration systems provide a sustainable possibility to reduce the environmental impact of refrigeration and air-conditioning as they allow for sources of otherwise unused excess waste heat to be reused for cooling purposes. Adsorp[...]
Article : texte imprimé
A combined double-way chemisorption refrigeration system was described and investigated, and the experimental test unit was built, which consists of two adsorption beds: one high-temperature salt bed (HTS bed), which is filled with manganese chl[...]
Article : texte imprimé
Jae Dong Chung, Auteur ;
Dae-Young Lee, Auteur
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This study systematically analyzes the effect of various kinds of design parameters on the performance of a desiccant cooling system under two different system configurations. The considered parameters include system components such as the sensi[...]
Article : texte imprimé
Jongsoo Jeong, Auteur ;
Seiichi Yamaguchi, Auteur ;
Kiyoshi Saito, Auteur
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If a desiccant dehumidification system can be driven by a heat source whose temperature is below 50 °C, exhaust heat from devices such as fuel cells or air conditioners can be used as its heat source, thereby saving energy. Therefore, in this st[...]
Article : texte imprimé
Jiazhen Ling, Auteur ;
Osamu Kuwabara, Auteur ;
Yunho Hwang, Auteur
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CO2 and R410A desiccant wheel (DW)-assisted separate sensible and latent cooling (SSLC) air-conditioning systems were tested under the AHRI standard. At a 50 °C regeneration temperature, the coefficient of performance (COP) of the vapor compress[...]
Article : texte imprimé
Experimental analysis and modeling of hydronic radiant ceiling panels using transient-state analysis
The model developed in this investigation considers the hydronic panels as a transient-state heat exchanger connected to a detailed lumped transient model of the building. The behavior of the hydronic ceiling system and the interactions with its[...]
Article : texte imprimé
Paweł Malinowski, Auteur ;
Maciej Sułowicz, Auteur ;
Janusz Bujak, Auteur
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This article presents the application of a neural model of heat transfer for the purpose of forecasting temperature at selected points of a circulating water ring network. The purpose of a circulating water system is to lower the temperature of [...]
Article : texte imprimé
Hakan Caliskan, Auteur ;
Arif Hepbasli, Auteur ;
Ibrahim Dincer, Auteur
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This study presents energy and exergy analyses and sustainability assessment of the novel evaporative air cooling system based on Maisotsenko cycle which allows the product fluid to be cooled in to a dew point temperature of the incoming air. In[...]
Article : texte imprimé
Neeraj Agrawal, Auteur ;
Jahar Sarkar, Auteur ;
Souvik Bhattacharyya, Auteur
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Thermodynamic (energy and exergy) analyses and optimization studies of two-stage transcritical N2O and CO2 cycles, incorporating compressor intercooling, are presented based on cycle simulation employing simultaneous optimization of intercooler [...]
Article : texte imprimé
Israel Martínez-Galván, Auteur ;
José Gonzálvez-Maciá, Auteur ;
José-M. Corberán, Auteur
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The paper presents the experimental results of a charge optimization study of a water-to-water chiller with two different oils: Mineral and POE. The employed chiller is a prototype which works with propane as refrigerant and provides for a cooli[...]
Article : texte imprimé
Paiguy Armand Ngouateu Wouagfack, Auteur ;
Réné Tchinda, Auteur
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This paper presents an optimization study of an irreversible refrigeration absorption system based on a new thermo-ecological criterion. The considered objective function is the ecological coefficient of performance (ECOP). It takes into account[...]
Article : texte imprimé
Bilal Ahmed Qureshi, Auteur ;
Syed M. Zubair, Auteur
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Performance degradation due to fouling in a vapor compression cycle is investigated for various applications. Considering the first set of refrigerants i.e. R134a, R410A and R407C, from a first law standpoint, the COP indicates that R134a always[...]
Article : texte imprimé
S. Grauso, Auteur ;
R. Mastrullo, Auteur ;
A.W. Mauro, Auteur
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The CO2 and propane blends are an interesting alternative to solve technical and safety issues related to the use of pure CO2 or pure hydrocarbons. These mixtures of pure fluids are environmentally friendly and have a large glide, that affects r[...]
Article : texte imprimé
R. Revellin, Auteur ;
J. Bonjour, Auteur
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Optimization of evaporators in refrigeration systems, for instance, can be conducted using entropy generation as a criterion. The latter can be used for choosing a technology (smooth tubes, enhanced tubes, tube diameter, etc) or selecting a flui[...]
Article : texte imprimé
Balaram Kundu, Auteur ;
Kwan-Soo Lee, Auteur
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In the present study, an optimum fin shape envelope was determined via a theoretical procedure that minimized the fin volume subject to constrained heat transfer rate. A unified analysis is presented for both longitudinal and pin fins with verti[...]
Article : texte imprimé
Hasan M. M. Afroz, Auteur ;
Akio Miyara, Auteur
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A generalized prediction correlation of condensation pressure drop inside herringbone microfin tubes has been proposed which includes the new empirical correlation of two-phase frictional multiplier and author’s previously proposed correlation o[...]
Article : texte imprimé
Hassan Hajabdollahi, Auteur ;
Pouria Ahmadi, Auteur ;
Ibrahim Dincer, Auteur
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This paper presents a thermoeconomic optimization of a shell and tube condenser, based on two new optimization methods, namely genetic and particle swarm (PS) algorithms. The procedure is selected to find the optimal total cost including investm[...]
Article : texte imprimé
Hoon Kang, Auteur ;
Ilyong Cho, Auteur ;
Honghee Park, Auteur
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To minimize the possibility of flash gas generation at the inlet of the expansion device in multi air-conditioners, an accumulator heat exchanger is usually adopted. In this study, the heat transfer rate and subcooling difference in an accumulat[...]
Article : texte imprimé
Maryam Ilchi-Ghazaani, Auteur ;
Parviz Parvin, Auteur
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Here, a novel multipurpose heat exchanger was designed and fabricated based on dry ice–ethylene glycol bath as the coolant mixture in order to characterize the operating parameters for fast chilling of the fluids with low electrical consumption.[...]
Article : texte imprimé
Giovanni Di Nicola, Auteur ;
Matteo Moglie, Auteur
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This work presents a literature survey of the available data of the experimental surface tension data for refrigerants. The experimental data were collected for the following pure fluids: R11, R12, R13, R13B1, R14, R21, R22, R23, R32, R113, R114[...]
Article : texte imprimé
Mohammad Sadegh Valipour, Auteur ;
Nima Niazi, Auteur
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Vortex tube is a mechanical device that operates as a refrigerating machine. This device separates a compressed gas stream into hot and cold streams. In this paper a series of experiments has been carried out to investigate the influence of unif[...]
Article : texte imprimé
In this study, three Ranque–Hilsch vortex tubes were used, which have 9 mm inside diameter and length/diameter ratio was 15. Their performances were examined as one of the classical RHVT and other was hot cascade type RHVT. Performance analysis [...]
Article : texte imprimé
M. M. Bassem, Auteur ;
Y. Ueda, Auteur ;
A. Akisawa, Auteur
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A traveling wave thermoacoustic refrigerator was designed, constructed, and tested. This refrigerator was composed of a linear motor, a branched tube, and a looped tube. A regenerator, composed of many screen meshes, was installed inside the loo[...]
Article : texte imprimé
K. Engelbrecht, Auteur ;
C. R. H. Bahl, Auteur ;
K.K. Nielsen, Auteur
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Magnetic refrigeration is a potentially environmentally-friendly alternative to vapor compression technology because it has a potentially higher coefficient of performance and does not use a gaseous refrigerant. The active magnetic regenerator r[...]
Article : texte imprimé
Wenqing Chen, Auteur ;
Ziwen Xing, Auteur ;
Hao Tang, Auteur
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Slide valve is normally employed in screw refrigeration compressor to meet the cooling capacity demanded by the load variation. A mathematical model describing the working process of screw refrigeration compressor with a slide valve assembly und[...]
Article : texte imprimé
Alessandro Beghi, Auteur ;
Luca Cecchinato, Auteur ;
Mirco Rampazzo, Auteur
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In this paper, the results of a research project aimed at deriving simple, high-performance, auto-tuning, robust control algorithms for evaporators controlled by means of EEVs (Electronic Expansion Valves) are reported. Control design is perform[...]
Article : texte imprimé
M.J. Ferrua, Auteur ;
R. P. Singh, Auteur
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The package system designs currently used by the strawberry industry are largely based on empirical techniques and have limited the efficiency of forced-air cooling applications. In this study, a new system capable of promoting a more uniform an[...]
Article : texte imprimé
Y. Barzanoni, Auteur ;
O. Noorshams, Auteur ;
H. Basirat Tabrizi, Auteur
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In the present work, frost formation on a horizontal cold cylinder was investigated experimentally. An apparatus was designed and carried out on a physical model which was included an air tunnel and a cold cylinder exposed to humid air flow. It [...]
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