The limitations of energy accessibility, the irreversibility and two transdisciplinary principles

The ability to produce motion based on man-made energy is essential to the civilization. Equally important is the most efficient use of energy to limit the consumption of natural resources as well as the resulting pollution. Consequently, it is necessary to know: - the factors that limit the energy accessibility; - the physical bases of irreversibility, as a premise of ensuring the maximum efficiency. The paper presents two new transdisciplinary principles: - the principle of energy accessibility, which introduces the concepts of degree of energy accessibility, degree of energy inaccessibility caused by natural conditions and degree of energy inaccessibility induced by technical conditions; - the principle of irreversibility which introduces the concept of degree of energy irreversibility in correlation with the physical bases of irreversibility.