Ejector configuration for designing a simple and high performance solar cooling system

Yusuke Saito, Tatsuya Ito, Akiko Matsuo, Haruki Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Ejector refrigeration cycle is a simple system, which can provide cooling by using solar thermal energy. Instead of a mechanical compressor of refrigeration cycle, refrigerant in evaporator is evacuated by an ejector using supersonic flow generated by the vapor pressure at temperatures being higher than around 60 °C. The ejector configuration design is a key to get a high efficiency of the cycle. In order to realize the behavior of the refrigerant in ejector, computational fluid dynamics (CFD) is applied to get the best geometry parameters, and then the parameters are confirmed by experimental trials. The CFD is developed as an in-house solver of the compressible Navier-Stokes equations. Through the numerical and experimental approach, four sets of configuration parameters of a mixing section area and a nozzle exit area of the ejector are being considered. A conclusion is that an appropriate mixing section area can make the greater cooling capacity but the condensing temperature decreases, while a smaller nozzle exit area can avoid the energy loss of shockwave that makes reliable repeatability and higher condensing temperature but lower cooling capacity in our experimental trials. The performances of ejector cycles having four different sets of configuration parameters cannot exceed a linear relationship between cooling capacity and condenser temperature so far. This paper reports an up-to-date result for developing an appropriate design method of ejector configuration.

Original languageEnglish
Title of host publicationEnergy Procedia
PublisherElsevier Ltd
Pages2564-2571
Number of pages8
Volume57
DOIs
Publication statusPublished - 2014
Event2013 ISES Solar World Congress, SWC 2013 - Cancun, Mexico
Duration: 2013 Nov 32013 Nov 7

Other

Other2013 ISES Solar World Congress, SWC 2013
CountryMexico
CityCancun
Period13/11/313/11/7

Fingerprint

Cooling systems
Cooling
Refrigerants
Refrigeration
Nozzles
Computational fluid dynamics
Temperature
Supersonic flow
Evaporators
Thermal energy
Vapor pressure
Navier Stokes equations
Compressors
Energy dissipation
Geometry

Keywords

  • Cfd
  • Ejector
  • Mixing section
  • Nozzle exit
  • Refrigeration cycle

ASJC Scopus subject areas

  • Energy(all)

Cite this

Saito, Y., Ito, T., Matsuo, A., & Sato, H. (2014). Ejector configuration for designing a simple and high performance solar cooling system. In Energy Procedia (Vol. 57, pp. 2564-2571). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2014.10.267

Ejector configuration for designing a simple and high performance solar cooling system. / Saito, Yusuke; Ito, Tatsuya; Matsuo, Akiko; Sato, Haruki.

Energy Procedia. Vol. 57 Elsevier Ltd, 2014. p. 2564-2571.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Saito, Y, Ito, T, Matsuo, A & Sato, H 2014, Ejector configuration for designing a simple and high performance solar cooling system. in Energy Procedia. vol. 57, Elsevier Ltd, pp. 2564-2571, 2013 ISES Solar World Congress, SWC 2013, Cancun, Mexico, 13/11/3. https://doi.org/10.1016/j.egypro.2014.10.267
Saito, Yusuke ; Ito, Tatsuya ; Matsuo, Akiko ; Sato, Haruki. / Ejector configuration for designing a simple and high performance solar cooling system. Energy Procedia. Vol. 57 Elsevier Ltd, 2014. pp. 2564-2571
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