Industrial Heat Pump-Assisted Wood Drying
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.
1. Introduction 2. Wood 3. Moisture in Wood 4. Moist Air 5. Importance of Wood Drying 6. Wood Drying Methods 7. Mechanisms of Lumber Drying 8. Kiln-Wide Lumber Drying 9. Heat Pump-Assisted Wood Dryers 10. Heat Pump Systems for Drying 11. Refrigerants 12. Heat Exchangers without Phase Changes 13. Moisture Condensers 14. Refrigerant-to-Air Condensers 15. Heat Pump Modeling 16. Case Studies 17. Present and Future R&D Challenges