High frequency pressure oscillator for microcryocoolers

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Vanapalli, S. and Brake ter, H.J.M. and Jansen, H.V. and Zhao, Y. and Holland, H.J. and Burger, J.F. and Elwenspoek, M.C. (2008) High frequency pressure oscillator for microcryocoolers. Review of Scientific Instruments, 79 (4). 045103. ISSN 0034-6748

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Abstract:Microminiature pulse tube cryocoolers should operate at a frequency of an order higher than the conventional macro ones because the pulse tube cryocooler operating frequency scales inversely with the square of the pulse tube diameter. In this paper, the design and experiments of a high frequency pressure oscillator is presented with the aim to power a micropulse tube cryocooler operating between 300 and 80 K, delivering a cooling power of 10 mW. Piezoelectric actuators operate efficiently at high frequencies and have high power density making them good candidates as drivers for high frequency pressure oscillator. The pressure oscillator described in this work consists of a membrane driven by a piezoelectric actuator. A pressure ratio of about 1.11 was achieved with a filling pressure of 2.5 MPa and compression volume of about 22.6 mm3 when operating the actuator with a peak-to-peak sinusoidal voltage of 100 V at a frequency of 1 kHz. The electrical power input was 2.73 W. The high pressure ratio and low electrical input power at high frequencies would herald development of microminiature cryocoolers.
Item Type:Article
Copyright:© 2008 American Institute of Physics
Faculty:
Science and Technology (TNW)
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/65150
Official URL:http://dx.doi.org/10.1063/1.2906229
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