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Improving efficiency of thermoacoustic refrigerators by a secondary source

Stig Kleiven (Institutionen för bygg- och miljöteknik, Teknisk akustik) ; Wolfgang Kropp (Institutionen för bygg- och miljöteknik, Teknisk akustik) ; K Larsson
17th International Congress on Sound and Vibration 2010, ICSV 2010, Cairo, 18 - 22 July 2010 Vol. 3 (2010), p. 2348-2355.
[Konferensbidrag, refereegranskat]

Improving efficiency and/or power are of key interest for heating and cooling devices, in particular thermoacoustic devices. Usually, thermoacoustic devices have a primary source attached opposite to the hard end termination of the resonator. The primary aim of this paper has been to investigate the potential of improving thermoacoustic devices by adding a secondary source replacing the hard end of the resonator. Using the secondary source the boundary conditions can be tuned arbitrarily. One specific case using a secondary source was studied closer: adapting the virtual length of the resonator together with the driving frequency. This case was investigated using simulations and parameter studies. The simulations were carried out using the time-domain model presented in a previous paper by the authors. Improvement in both efficiency and power were achieved by tuning the virtual length together with driving frequency. Moreover, these parameters may be tuned in real-time in an active control system using a secondary source.



Denna post skapades 2013-01-09. Senast ändrad 2015-01-08.
CPL Pubid: 169855

 

Institutioner (Chalmers)

Institutionen för bygg- och miljöteknik, Teknisk akustik (2005-2017)

Ämnesområden

Strömningsmekanik och akustik

Chalmers infrastruktur