Entransy variation associated with work

The analyses of thermal systems are necessary because of the energy situation. In this paper, two kinds of thermal systems with work, a common heat–work conversion system and a common heat pump system, are analyzed with the entransy theory. The entransy terms and variations for thermal system with heat–work interaction are discussed. The concept of entransy variation associated with work is proposed. The results show that the entransy variation associated with work is directly related to output work and has the same change tendency as that of the work.