Auteur Eckhard A. Groll
Documents disponibles écrits par cet auteur (12)
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Craig R. Bradshaw, Auteur ; Eckhard A. Groll, Auteur ; Suresh V. Garimella, Auteur |A comprehensive model of a miniature-scale linear compressor for electronics cooling is presented. Linear compressors are appealing for refrigeration applications in electronics cooling. A small number of moving components translate to less theo[...]
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[...]
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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[...]
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Abhijit A. Sathe, Auteur ; Eckhard A. Groll, Auteur ; Suresh V. Garimella, Auteur |This paper presents an analytical approach for modeling the transient dynamic forces in a diaphragm compressor which operates under the action of an electrostatically actuated diaphragm. An experimentally validated, quasi-static model for a diap[...]
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Ian H. Bell, Auteur ; Eckhard A. Groll, Auteur ; James E. Braun, Auteur |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
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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Margaret M. Mathison, Auteur ; James E. Braun, Auteur ; Eckhard A. Groll, Auteur |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
Bin Yang, Auteur ; Craig R. Bradshaw, Auteur ; Eckhard A. Groll, Auteur |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 [...]
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Margaret M. Mathison, Auteur ; James E. Braun, Auteur ; Eckhard A. Groll, Auteur |While economizing can improve the performance of vapor compression cycles, the cost of multi-stage compressors has limited its implementation to large-scale applications. However, the development of compressors with injection ports presents new [...]
Article : texte imprimé
Ian H. Bell, Auteur ; Eckhard A. Groll, Auteur ; James E. Braun, Auteur |Vapor compression refrigeration technology has seen great improvement over the last several decades in terms of cycle efficiency through a concerted effort of manufacturers, regulators, and research engineers. As the standard vapor compression s[...]
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). The current study expands upon this work by first developing methods for predicting the resonant frequency of a linear compr[...]
Article : texte imprimé
Bryce R. Shaffer, Auteur ; Eckhard A. Groll, Auteur |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[...]
