Thermodynamic optimization of cryogenic systems

• Autorzy: Chorowski M.
• Języki publikacji: EN

Abstrakty

EN

Superfluid He II cooling for high field superconducting magnets has been developed using the opportunity of large scale project in fusion power generation and high energy physics laboratories. The magnets are cryostated at temperature as low as 1.8 K. The necessary energy input for 1 W of cooling power at 1.8 K is of the order of 1 kW and the use of superfluid helium at the temperature below 2.0 K requires efficient and low energy consuming cryostats. The cryostat design can be optimized on the basis of the Second Law of Thermodynamics with use of entropy generation minimization method, within the boundary and technical constraints of the device. The paper presents the discussion of theoretical background of entropy generation minimization method and gives the example from the cryostat design practice. The basic scheme of superfluid pressurized He II cryostat is given.The He II cryostat built in the Institute of Power Engineering and Fluid Mechanics is described together with the optimization procedure of the cryostat thermal insulation system based on the entropy minimization method.

Słowa kluczowe

EN

cryogenic systems; entropy minimization; superfluid helium

PL

minimalizacja entropii; nadciecz hel; system kriogeniczny

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2006
• Tom: Vol. 27, no. 4
• Strony: 57--66
• Opis fizyczny: Wz., rys.,Bibliogr. 7 poz.,

Twórcy

autor

Chorowski M.

Bibliografia

• [1] CLAUDET G., AYMAR R.: Tore Supra and He II cooling of large high field magnets, Adv. in Cryogenic Eng., Vol. 35, Plenum Press, New York, 1990, 55-67.
• [2] LEBRUN PH.: Cryogenics for the Large Hadron Collider, IEEE Trans. Appl. Super-conductivity 10, 1, 2000, 1500-1506.
• [3] SZARGUT J.: Exergy Method, Technical and Ecological Applications, WIT Press, Southampton, Boston, 2005.
• [4] BEJAN A.: Entropy Generation Minimization, CRC Press, New York, 1996.
• [5] CHOROWSKI M.: Comparative Exergetic Analysis of Joule- Thomson Liqueflers, Adv. in Cryogenic Eng., Vol. 49, AIP Press, 2004, 1568-1575.
• [6] DEVRED A. ET AL.: Overview and status of the Next European Dipole Joint Research Activity, Supercond. Sci. Technol. 19 (2006) S67-S83.
• [7] WEISEND J. G. II: Handbook of Cryogenic Engineering, Taylor & Francis, Philadelphia 1998.