Power yield and power consumption in thermo-electro-chemical systems - a synthesizing approach

Stanisław Sieniutycz

Abstract

In this synthesizing research methods of mathematical programming and dynamic optimization are applied to determine limits on power yield or power consumption in various energy systems, such as thermal engines, heat pumps, solar dryers, electrolysers, and fuel cells. Methodological similarities are enunciated when treating power limits in engines, separators, and heat pumps. Numerical approaches to multistage systems are based on the methods of dynamic programming (DP) or Pontryagin’s maximum principle. The first method searches for properties of optimal work and is limited to systems with low dimensionality of state vector, whereas the second investigates properties of differential (canonical) equations derived from the process Hamiltonian. In this paper a relatively unknown symmetry in behaviour of power producers (engines) and power consumers is shown. An approximate evaluation shows that, at least 1/4 of power dissipated in the natural transfer process must be added to a separator or heat pump in order to assure a required process rate. Applications include drying systems which, by nature, require a large amount of thermal or solar energy. We search for minimum power consumed in one-stage and multistage operation of fluidized drying. This multistage system is supported by heat pumps. We outline the related dynamic programming procedure, and also point out a link between the present irreversible approach and the classical problem of minimum reversible work driving the system.
Author Stanisław Sieniutycz (FCPE / DSP)
Stanisław Sieniutycz,,
- Department of Separation Processes
Journal seriesEnergy Conversion and Management, ISSN 0196-8904
Issue year2013
Vol68
Pages293-304
Publication size in sheets0.55
Keywords in Polishlimity mocy, silniki, pompy ciepła, separatory, suszarki, nergia słoneczna
Keywords in Englishpower limits, engines, heat pumps, separators, dryers, solar energy
DOIDOI:10.1016/j.enconman.2013.01.010
URL http://www.sciencedirect.com/science/article/pii/S0196890413000307
Languageen angielski
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Sieniutycz S. - Power yield and....pdf 683.48 KB
Score (nominal)45
ScoreMinisterial score = 40.0, 28-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 45.0, 28-11-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2013 = 3.59 (2) - 2013=3.604 (5)
Citation count*3 (2020-01-01)
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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