Entransy

A new physical quantity, E#95;#92;text#123;h#125;#61;#92;frac#123;1#125;#123;2#125;Q#95;#92;text#123;vh#125;T [where Q#95;#92;text#123;vh#125;#61;Mc#95;#92;text#123;v#125;T is the heat stored in an object; M is the mass; c#95;#92;text#123;v#125; is the specific heat capacity at constant volume; T is the temperature], has been identified as a basis for optimizing heat transfer processes in terms of the analogy between heat and electrical conduction. This quantity, which will be referred to as entransy, corresponds to the electric energy stored in a capacitor.

The concept of ‘entransy’, a product of heat and temperature, originally called ‘heat transport potential capacity’, was introduced in 2003, as analogy to product of electrical charge and voltage, as well as other similar quantities. The concept has been extended to entransy property, as integral product of ‘stored heat’ and temperature, #92;frac#123;1#125;#123;2#125;Mc#95;#92;text#123;v#125;T² [where M is mass; c#95;#92;text#123;v#125; is specific heat capacity at constant volume; T is temperature], thus representing quantity and quality of stored heat, or thermal energy in isochoric processes without work interactions.