Title: One of Possible Applications of High-Tc Superconductors

Abstract: Possible application of a result contradicting to the second law of thermodynamics is announced. According to this result the chaotic energy of thermal fluctuation can be transformed in electric energy of direct current in an inhomogeneous superconducting ring. Although the power of this transformation is very weak this effect has optimistic perspective of wide application because useful energy can be obtained from heat energy in the equilibrium state. It is explain why the second law can be broken in some quantum systems. In the last years some authors have concluded almost at once on violation of the second law in different quantum systems: A.E.Allahverdyan and Th.M.Nieuwenhuizen, PRL 85, 1799 (2000); cond-mat/0011389; V.Capec and J.Bok Czech. J. of Phys. 49, 1645 (1999); cond-mat/0012056; Physica A 290, 379 (2001); D. Sheehan, Phys. Plasmas 2 (6), 1893 (1995); Phys. Rev.E 61, 4662 (2000); P. Weiss, Science News, 158, 234 (2000).