International journal of refrigeration, Vol. 36 N° 7. International journal of refrigeration - Novembre 2013
| Titre : | International journal of refrigeration, Vol. 36 N° 7. International journal of refrigeration - Novembre 2013 |
| Type de document : | Bulletin |
| Paru le : | 12/01/2014 |
Dépouillements
Article : texte imprimé
Qiang Jianguo, Auteur ;
Zhenquan, Liu, Auteur
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General criteria for scroll profiles that include the evolute, orbiting movement, differential, and integrative conditions are proposed. The profile error sensitivity is defined based on the composite meshing error and meshing clearances of the [...]
Article : texte imprimé
Bryce R. Shaffer, Auteur ;
Eckhard A. Groll, Auteur
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In a scroll-type compressor, compression is achieved through relative contact between two spiral curves. Since the scroll invention by Leon Creux (1905), multiple methods have been developed for calculating scroll geometry. What can generally be[...]
Article : texte imprimé
E. Navarro, Auteur ;
A. Redón, Auteur ;
José Gonzálvez-Maciá, Auteur
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The interest in two stage cycles has increased in the last years and some compressor manufacturers have commercialized compressors adapted to work in these conditions. Nevertheless, the information supplied by them usually is limited to certain [...]
Article : texte imprimé
Qiang Jianguo, Auteur ;
Bin Pen, Auteur ;
Zhenquan, Liu, Auteur
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This two-part work proposes a dynamic model for the orbiting scroll based on the pressures in the scroll chambers. In Part I, the scroll mechanism and characteristic polygon of the scroll compressor are defined, the geometry of the multi-wrap co[...]
Article : texte imprimé
Qiang, Jianguo, Auteur ;
Peng, Bin, Auteur ;
Zhenquan, Liu, Auteur
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This two-part study proposes a dynamic model for the orbiting scroll based on the pressures in scroll chambers. Part II investigates scroll compressors by using the dynamic model developped in this work to predicate the dynamic characteristics o[...]
Article : texte imprimé
Ian H. Bell, Auteur ;
Eckhard A. Groll, Auteur ;
James E. Braun, Auteur
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In this work, a residential air conditioning compressor designed for vapor injection has been modified in order to inject large quantities of oil into the working chamber in order to approach an isothermal compression process. The compressor was[...]
Article : texte imprimé
Wenqing Chen, Auteur ;
Ziwen Xing, Auteur ;
Jiubing Shen, Auteur
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In the semi-hermetic screw refrigeration compressor, the motor is mostly cooled down by suction refrigerant before it flows into the compressor suction port. To investigate cooling effects of the motor and performance of the compressor under par[...]
Article : texte imprimé
Sham Rane, Auteur ;
Ahmed Kovacevic, Auteur ;
Nikola Stosic, Auteur
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Customized grid generation of twin screw machines for CFD analysis is widely used by the refrigeration and air-conditioning industry today, but is currently not suitable for topologies such as those of single screw, variable pitch or tri screw r[...]
Article : texte imprimé
Xiang Gao, Auteur ;
Jinfeng, Chen, Auteur ;
Jianmei Feng, Auteur
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A numerical simulation was conducted of the dynamic trajectories and the separation performance of oil droplets, with a focus on the breakup of oil droplets in an oil–gas cyclone separator. The separation efficiency was also studied experimental[...]
Article : texte imprimé
Marcus Vinícius C. Alves, Auteur ;
Jader R. Barbosa Jr., Auteur ;
Alvaro T. Prata, Auteur
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A model is presented for calculating the volume flow rate in an eccentric-tube centrifugal oil pump for reciprocating compressors. The oil pump assembly consists of a pick-up tube with an inclined inlet that is mounted off-center with the cranks[...]
Article : texte imprimé
Rodrigo A. Pizarro-Recabarren, Auteur ;
Jader R. Barbosa Jr., Auteur ;
Cesar J. Deschamps, Auteur
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The stiction effect is a source of thermodynamic losses in compressor suction and discharge systems. Deformation of the lubricant film between the valve and the seat delays the valve opening, as larger pressure differences between the cylinder a[...]
Article : texte imprimé
Bin Yang, Auteur ;
Craig R. Bradshaw, Auteur ;
Eckhard A. Groll, Auteur
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A comprehensive model for a semi-hermetic CO2 reciprocating compressor is presented. This comprehensive model is composed of three main sub-models simulating the geometry and kinematics, the compression process, and frictional power loss. Valve [...]
Article : texte imprimé
Zengli, Wang, Auteur ;
Xiaoling, Yu, Auteur ;
Feilong, Liu, Auteur
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In the rotary compressor, the rolling piston and the contacted rotor-journal bearing system are main moving components. They suffer very large periodically varying loads introduced by the inertia force, the contact force and the gas force. These[...]
Article : texte imprimé
Emilio, Navarro-Peris, Auteur ;
José-M. Corberán, Auteur ;
Luigi Falco, Auteur
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Pierre (1982) developed general correlations of compressor performance for a wide range of open piston compressors based on a vast amount of data provided by the most important open compressors manufacturers at that time. Based on a wide experim[...]
Article : texte imprimé
A computationally efficient hybrid leakage model for positive displacement compressors and expanders
Ian H. Bell, Auteur ;
Eckhard A. Groll, Auteur ;
James E. Braun, Auteur
|
An empirical frictional correction factor to the isentropic nozzle model has been developed for application to refrigerant leakage modeling in scroll, rotary and other similar compressors and expanders. This correction factor is derived by calcu[...]
Article : texte imprimé
Craig R. Bradshaw, Auteur ;
Eckhard A. Groll, Auteur
|
A comprehensive simulation model of a novel rotating spool compressor is presented. The spool compressor provides a new rotary compression mechanism with easily manufactured components. A detailed analytical geometry model of the spool compresso[...]
Article : texte imprimé
Margaret M. Mathison, Auteur ;
James E. Braun, Auteur ;
Eckhard A. Groll, Auteur
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A model of a novel rotary spool compressor has been developed to explore the effect of multiple injection ports on compressor and cycle performance. The thermodynamic model includes the effects of heat transfer and leakage and is numerically sol[...]
Article : texte imprimé
Craig R. Bradshaw, Auteur ;
Eckhard A. Groll, Auteur ;
Suresh V. Garimella, Auteur
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A comprehensive model of a linear compressor for electronics cooling was previously presented by Bradshaw et al. (2011). The current study expands upon this work by first developing methods for predicting the resonant frequency of a linear compr[...]
Article : texte imprimé
Craig R. Bradshaw, Auteur ;
Eckhard A. Groll, Auteur ;
Suresh V. Garimella, Auteur
|
A comprehensive model of a linear compressor for electronics cooling was previously presented by Bradshaw et al. (2011) then enhanced and used for a sensitivity analysis of the leakage gap, eccentricity, and piston geometry by Bradshaw et al. (2[...]
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