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Energy Efficiency and Environmental Loads of Drying Systems
Karlstad University, Faculty of Technology and Science, Department of Energy, Environmental and Building Technology.
2005 (English)Conference paper, (Refereed)
Abstract [en]

Some of the key issues in the area of combined environmental and energy optimization of integrated industrial process systems are discussed, with emphasis on systems that include drying processes. This involves minimization of both energy resource losses and harmful emissions. The risks for environmental sub-optimization in wood drying systems are analyzed on the basis of concrete examples from wood fuel pellet production systems. In particular, the role of terpene emissions is discussed. Important concepts for energy efficiency optimization are discussed. In particular, fundamental problems hindering the use of the exergy concept for systems integration and optimization are described and the possibilities for resolving them are analyzed. The well-known reference state problem is shown to be part of a larger, more intractable problem. In this context, the roles of thermodynamic non-equilibrium and rate constraints are elaborated. It is argued that in order to reach broad applicability of the exergy concept it is necessary to develop a modified concept, which takes into account not only the usual constraints emanating from the three laws of thermodynamics but also other physical as well as technical constraints

Place, publisher, year, edition, pages
Trondheim, 2005.
Keyword [en]
Efficiency, optimization, terpene emissions, exergy, process integration, wood fuel
National Category
Energy Systems
Research subject
Environmental and Energy Systems
Identifiers
URN: urn:nbn:se:kau:diva-18882OAI: oai:DiVA.org:kau-18882DiVA: diva2:592523
Conference
Proceedings of the 3rd Nordic Drying Conference, Karlstad, 15-17 June 2005
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2013-01-21

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