Wood or other biomass is often used as a fuel for the process heat for drying agricultural products such as tea and coffee. This book describes existing biomass-fired systems giving an outline of different air heaters commonly in use. The design procedure for a more efficient air heater with an output in the range of 300 to 400 kW is described.The performance and costs of this improved heater are compared with a traditional system. By providing a basic design rationale for efficient drying systems, this book will be of interest to engineers in agricultural processing industries in developing countries.
Reupke, P.; Tariq, A.S. Biomass-fuelled indirect air heater for agro-processing industries: design approach. Natural Resources Institute, Chatham, UK (1994) 44 pp. ISBN 0-85954-370-6