Thermodynamic optimization for work-assisted heating and drying operations

Stanisław Sieniutycz

Abstract

We construct thermodynamic criteria for optimization of sequential work-assisted heating and drying operations which run jointly with ‘endoreversible’ thermal machines. The total power input is minimized with constraints which take into account the dynamics of heat and mass transport and rate of work consumption. Finite-rate, endoreversible models include the irreducible losses of classical exergy potential caused by the thermal resistances. Extremum performance functions for optimal work, which incorporate residual entropy production, are formulated in terms of end states, duration and (in discrete processes) number of stages. Formal analogies between entropy production expressions for work-assisted and conventional drying operations help formulate optimization models of the former. An optimization procedure for a two-stage drying operation with an endoreversible heat pump at each stage is outlined.
Author Stanisław Sieniutycz (FCPE / DSP)
Stanisław Sieniutycz,,
- Department of Separation Processes
Journal seriesEnergy Conversion and Management, ISSN 0196-8904
Issue year2000
Vol41
No18
Pages2009-2039
Publication size in sheets1.5
Keywords in EnglishCarnot cycles, endoreversible engines, exergy (available energy), finite-time thermodynamics, heat pumps, second law, thermodynamic limits
DOIDOI:10.1016/S0196-8904(00)00034-0
URL http://ac.els-cdn.com/S0196890400000340/1-s2.0-S0196890400000340-main.pdf?_tid=86bf76ac-e7b2-11e6-abb5-00000aab0f6b&acdnat=1485866643_e48ebe4498ab706c6e285c5edcaa13c4
Languageen angielski
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Sieniutycz S. - Thermodynamic optimization for....pdf 320.75 KB
Score (nominal)35
Publication indicators WoS Impact Factor: 2006 = 1.325 (2) - 2007=1.607 (5)
Citation count*13 (2015-02-24)
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