Optimal Control of Solar Sludge Dryers

Autor: Ido Seginer, Markus Bux, Ilya Ioslovich
Rok vydání: 2007
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Zdroj: Drying Technology. 25:401-415
ISSN: 1532-2300
0737-3937
DOI: 10.1080/07373930601184577
Popis: Optimal control (OC) methodology is used to develop a control policy for a batch-operated solar sludge dryer with ventilation as the dominant control. Batch performance criteria and instantaneous optimization criteria are developed for two economic environments: quota limited and capital limited. The general formulation, as well as simplifications resulting from the multiplicative form of the evaporation (drying) rate model, are presented. The multiplicative form results in a single constant number, called here “control intensity,” which is used to guide the on-line control decisions. These decisions turn out to be independent of the dry solids content (DSC) of the sludge. Further simplification, by assuming a strictly constant weather, is used to demonstrate the general effects of the economic and physical (weather) environment on the solution. The OC approach is used to address, via simulation under realistic weather conditions, several design, operation, and pricing problems. In particular, the followi...
Databáze: OpenAIRE
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