Introduction -- The wood -- Moisture in wood -- Moist air -- Importance of drying wood -- Wood drying methods -- Mechanisms of lumber drying -- Kiln-wide lumber drying -- Heat pump-assisted -- Heat pump systems for drying -- Refrigerants and lubricants -- Heat exchangers without phase changes -- Moisture condensers -- Refrigerant-to-air condensers -- Heat pump modeling -- Case studies -- Present and future R&D challenges.
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SUMMARY OR ABSTRACT
Text of Note
This book discusses conventional as well as unconventional wood drying technologies. It covers fundamental thermophysical and energetic aspects and integrates two complex thermodynamic systems, conventional kilns and heat pumps, aimed at improving the energy performance of dryers and the final quality of dried lumber. It discusses advanced components, kiln energy requirements, modeling, and software and emphasizes dryer/heat pump optimum coupling, control, and energy efficiency. Problems are included in most chapters as practical, numerical examples for process and system/components calculation and design. The book presents promising advancements and R&D challenges and future requirements--