Thermodynamic Criteria for Optimization of Work-Assisted and Conventional Drying Operations

• Autorzy: Sieniutycz S. , Szwast Z.
• Języki publikacji: EN

Abstrakty

EN

This work presents thermodynamic criteria for optimization of work-assisted drying operations and compares these criteria with those conventional drying operations in sequential systems. For the work-assisted operations, which run jointly with thermal machines, such as heat pumps, total power input is minimized at constrains which describe dynamics of energy and mass exchange. Finite-rate models take into account irreducible consumption of the classical exergy caused by lossy elements in the system. Optimal work functions, which incorporate a residual entropy production, are found in terms of end states, duration and (in discrete processes) number of stages. Mathematical analogies between entropy production expressions in work-assisted and conventional operations are helpful to formulate optimization criteria of the former.

Słowa kluczowe

EN

finite-time thermodynamics; Carnot cycles; heat pumps; exergy (available energy); thermodynamic limits; second law

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2000
• Tom: Vol. 48, nr 3
• Strony: 315--332
• Opis fizyczny: bibliogr. 21 poz.

Twórcy

autor

Sieniutycz S.

autor

Szwast Z.

• Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, PL-00-645 Warszawa, Poland (Wydział Inżynierii Chemicznej i Procesowej PW)