Journal ArticleDOI
An experimental investigation of steam ejectors for applications in jet-pump refrigerators powered by low-grade heat:
Ian W. Eames,Shenyi Wu,Mark Worall,Satha Aphornratana +3 more
- Vol. 213, Iss: 5, pp 351-361
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TLDR
In this paper, the authors describe and evaluate the results of an experimental investigation into the operation of ejectors primarily for use in jet-pump refrigerators, and the construction of a steam-steam ejector test facility and experimental method are described.Abstract:
The jet-pump refrigerator cycle offers a low-capital-cost solution for utilizing low-grade waste heat in the production of cooling for buildings and process refrigeration. The heart of the jet-pump refrigerator is an ejector, the performance of which strongly determines the thermal efficiency of the cycle. This paper describes and evaluates the results of an experimental investigation into the operation of ejectors primarily for use in jet-pump refrigerators. The construction of a steam-steam ejector test facility and experimental method are described. Experimental results are provided concerning the effects of primary nozzle exit position within the mixing-entrainment section, primary nozzle exit and diffuser throat areas. The causes and effects of flow instability under conditions of high secondary pressure ratio are also discussed and methods of increasing the critical condenser pressure are identified and rated in order of effect.read more
Citations
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Journal ArticleDOI
Ejectors: applications in refrigeration technology
K. Chunnanond,Satha Aphornratana +1 more
TL;DR: A literature review on ejectors and their applications in refrigeration can be found in this article, where a number of studies are grouped and discussed in several topics, i.e. background and theory of ejector and jet refrigeration cycle, performance characteristics, working fluid and improvement of jet refrigerator.
Journal ArticleDOI
Performance prediction of steam ejector using computational fluid dynamics: Part 1. Validation of the CFD results
TL;DR: In this paper, the authors investigated the use of CFD in predicting performance of a steam ejector used in refrigeration applications and found that CFD was not only a sufficient tool in predicting ejector performance but also provided a better understanding in the flow and mixing processes within the ejector.
Journal ArticleDOI
An experimental investigation of a steam ejector refrigerator: the analysis of the pressure profile along the ejector
K. Chunnanond,Satha Aphornratana +1 more
TL;DR: In this paper, a 3 kW cooling capacity steam ejector refrigerator was constructed and the static pressure along the ejector axis at various operating conditions was measured and plotted, and analyzed experimental results introduced three new parameters.
Journal ArticleDOI
A comprehensive review of ejector design, performance, and applications
TL;DR: The objective of this work is to provide a literature survey on the research attempts made in the field of ejector refrigeration systems and the studies made on the ejector as a component.
Journal ArticleDOI
Computational fluid-dynamics modeling of supersonic ejectors: Screening of turbulence modeling approaches
Giorgio Besagni,Fabio Inzoli +1 more
TL;DR: In this article, the authors presented a numerical study of the turbulent compressible fluid in a supersonic ejector and compared seven RANS turbulence closures with different near-wall modeling options to investigate the wall treatment effect on numerical results.
References
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Journal ArticleDOI
A theoretical and experimental study of a small-scale steam jet refrigerator
TL;DR: In this paper, a small-capacity steam jet refrigerator has been tested with boiler temperatures in the range 120-140°C and the experimental data were found to be within 85% of the theoretical values.
Journal ArticleDOI
A small capacity steam-ejector refrigerator: experimental investigation of a system using ejector with movable primary nozzle
Satha Aphornratana,Ian W. Eames +1 more
TL;DR: In this article, an experimental study of a steam-ejector refrigerator using an ejector with a primary nozzle that could be moved axially within the mixing chamber section was performed.
Thermodynamic and transport properties of fluids
TL;DR: In this paper, a program subroutine FLUID calculates thermodynamic and transport properties of pure fluids in liquid, gas, or two-phase (liquid/gas) conditions.
Journal ArticleDOI
The jet-pump cycle—A low cost refrigerator option powered by waste heat
TL;DR: In this article, the potential of the jet-pump cycle as a low capital cost option for providing refrigeration utilising low grade waste heat is evaluated and compared with vapour compression systems.
District heating assisted ejector cycle refrigeration plant for process cooling and aircondition purposes. Discussion
S. Lund,L. Soe,I. W. Eames,Koren +3 more
TL;DR: In this article, the authors decrit une installation pilotee situee au Danemark, which utilise un ejecteur haute performance associe au chauffage urbain comme systeme de compression and de l'eau comme frigorigene.
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