International journal of refrigeration, Vol. 33 N° 3. International journal of refrigeration - Mai 2010
| Titre : | International journal of refrigeration, Vol. 33 N° 3. International journal of refrigeration - Mai 2010 |
| Type de document : | Bulletin |
| Paru le : | 16/06/2010 |
Dépouillements
Article : texte imprimé
R. Bjørk, Auteur ;
C. R. H. Bahl, Auteur ;
A. Smith, Auteur
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One of the key issues in magnetic refrigeration is generating the magnetic field that the magnetocaloric material must be subjected to. The magnet constitutes a major part of the expense of a complete magnetic refrigeration system and a large ef[...]
Article : texte imprimé
Andrej Kitanovski, Auteur ;
Peter W. Egolf, Auteur
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Magnetic heating, refrigeration and energy conversion have caused awareness of being promising future environmentally benign technologies with much potential to enter some existing markets. An increased research activity is observed, which to th[...]
Article : texte imprimé
Article : texte imprimé
Katsuyuki Tanaka, Auteur ;
Yukihiro Higashi, Auteur
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Measurements of the thermodynamic properties of HFO-1234yf were conducted. The critical temperature TC, critical density ρC, and critical pressure PC, were measured by the visual observation of the meniscus disappearance, and were determined to [...]
Article : texte imprimé
Hiroyuki Kumano, Auteur ;
Tetsuo Hirata, Auteur ;
Yasuyuki Izumi, Auteur
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Effects of solute included in a sample on the specific enthalpy of ice are investigated experimentally. In the experiments, ice including the solute was made from an aqueous solution, and the specific enthalpy was measured by melting the ice in [...]
Article : texte imprimé
Alpaslan Alkan, Auteur ;
Murat Hosoz, Auteur
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This study investigates the experimental performance of an automotive air conditioning (AAC) system for the cases of employing fixed and variable capacity compressors (FCC and VCC). For this aim, an experimental system consisting of original com[...]
Article : texte imprimé
Jongsoo Jeong, Auteur ;
Seiichi Yamaguchi, Auteur ;
Kiyoshi Saito, Auteur
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A desiccant dehumidification system with air can decrease energy consumption because it can be driven by low-grade waste heat below 80 °C. If this system can be driven by low-temperature heat sources whose temperature is below 50 °C, exhausted h[...]
Article : texte imprimé
Jiazhen Ling, Auteur ;
Yunho Hwang, Auteur ;
Reinhard Radermacher, Auteur
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The advantage of separating sensible and latent cooling (SSLC) via the use of separate cycles is saving energy by raising the evaporating temperature of the sensible cooling process. In this study, the pertinent characteristics of the SSLC syste[...]
Article : texte imprimé
Chan Woo Park, Auteur ;
Yong Tae Kang, Auteur
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The characteristics of double stage evaporator/absorber are studied to realize a large temperature difference absorption system. In the case of the double stage evaporator/absorber with the large temperature difference of the chilled water (15 °[...]
Article : texte imprimé
Berhane H. Gebreslassie, Auteur ;
Marc Medrano, Auteur ;
Filipe Mendes, Auteur
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The optimum allocation of the heat exchange area considers both running and investment cost. The structural method of thermoeconomic optimization is used to derive a simple equation for the estimation of the economic optimum of the area of a hea[...]
Article : texte imprimé
Bin Li, Auteur ;
Alleyne, Andrew G., Auteur
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This paper presents an advanced switched modeling approach for vapor compression cycle (VCC) systems used in Air Conditioning and Refrigeration. Building upon recent work (McKinley and Alleyne, 2008), a complete dynamic VCC model is presented th[...]
Article : texte imprimé
Ki-Jung Park, Auteur ;
Dongsoo Jung, Auteur
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In this study, nucleate boiling heat transfer coefficients (HTCs) of HFC134a and R1234yf were measured on a flat plain and low fin surfaces. All data were taken at the liquid pool temperature of 7 °C on a small horizontal square copper plate (9.[...]
Article : texte imprimé
Chaobin Dang, Auteur ;
Koji Iino, Auteur ;
Eiji Hihara, Auteur
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Heat transfer characteristics of supercritical CO2 cooled inside a small internally grooved tube were investigated. The mean inner diameter (ID) and helix angle of this tube were 2 mm and 6.3°, respectively. Experiments were conducted in the pre[...]
Article : texte imprimé
M. Hamdar, Auteur ;
A. Zoughaib, Auteur ;
D. Clodic, Auteur
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This study investigates boiling heat transfer and two-phase pressure drop of HFC-152a in a horizontal square mini-channel of 1 mm in diameter. Convection heat fluxes were obtained using an inverse heat transfer method. Tests were performed at a [...]
Article : texte imprimé
A.S. Pamitran, Auteur ;
Kwang-Il Choi, Auteur ;
Jong-Taek Oh, Auteur
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An experimental investigation on the characteristics of two-phase flow pattern transitions and pressure drop of R-22, R-134a, R-410A, R-290 and R-744 in horizontal small stainless steel tubes of 0.5, 1.5 and 3.0 mm inner diameters is presented. [...]
Article : texte imprimé
Pradeep Bansal, Auteur ;
David Fothergill, Auteur ;
Ryan Fernandes, Auteur
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This paper presents a thermal analysis of a defrost cycle in order to design more efficient defrosting mechanisms in household refrigerators and freezers. A simple heat transfer model has been developed to determine energy flows from a defrost h[...]
Article : texte imprimé
J.B. Laurindo, Auteur ;
B. A. M. Carciofi, Auteur ;
R. Silva, Auteur
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A new procedure for on-line monitoring of heat transfer coefficients (h) during immersion cooling is presented. The signature of the resultant force acting on a sphere connected to a load cell by a rigid rod and immersed in a stirred tank was us[...]
Article : texte imprimé
Matthew S. Elliott, Auteur ;
Rasmussen, Bryan P., Auteur
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Evaporator superheat control is an important aspect of the operation of refrigeration and air conditioning systems; since the majority of cooling in these systems occurs through evaporation of two-phase refrigerant, the energy efficiency is dram[...]
Article : texte imprimé
Yangguang Liu, Auteur ;
Chinghua Hung, Auteur ;
Yuchoung Chang, Auteur
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This paper develops a design optimization procedure in scroll-type compressor (STC). By integrating the verified STC simulation model with an optimum solver, a frictional losses reduced problem of bearing components has been investigated. After [...]
Article : texte imprimé
Ling-Xiao Zhao, Auteur ;
Chun-Lu Zhang, Auteur
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The paper presents neural network approach to performance evaluation of the fin-and-tube air-cooled condensers which are widely used in air-conditioning and refrigeration systems. Inputs of the neural network include refrigerant and air-flow rat[...]
Article : texte imprimé
Nicholas Fernandez, Auteur ;
Yunho Hwang, Auteur ;
Reinhard Radermacher, Auteur
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A CO2 heat pump water heater breadboard facility was built and a performance evaluation was conducted to investigate the effect of ambient temperature and hot water temperature on the overall coefficient of performance (COP) during full tank hea[...]
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