Title:
Analysis of the Chemical Efficiency of a Wood Chip Gasifier
Author(s):
Zschunke, T., Schneider, R., Salomo, B., Schwarzbach, P., Kurz, M.
Document(s):
Paper
Abstract:
Heat and power supply from wood as the fuel, in a power range of, for example, up to 100-150 kWe, is becoming more and more practicable for commercial use. Nevertheless, the predominant thermochemical processes need to be understood better, establishing more firmly the foundation for further development of the technology and a higher return on investment. For this investigation a reliable data base must first be ensured. Since 2013 the Zittau/Görlitz University of Applied Sciences has been operating a 30 kWe combined heat and power research plant based on the Joos wood gasification principle. This paper presents the results of the initial investigation of the downdraft fixed bed reformer, which is one main component of the above-mentioned plant. The data was monitored within an experimental campaign of approximately eight hours of plant operation. Both the energy and mass balances and the gasifier cold gas efficiency were determined for a steady-state operation of two hours. The cold gas efficiency lies within a range of 80 % to 90 %, which seems to be higher than anticipated. The falsification of the data using energy balance revealed the existence of hidden problems with measurement methods and accuracy. Before any data can be used for a detailed analysis of thermochemical mechanisms and processes, these problems and questions must be solved.
Keywords:
combined heat and power generation (CHP), efficiency, energy balance, gasification, mass balance
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Gasification for power, CHP and polygeneration
Event:
22nd European Biomass Conference and Exhibition
Session:
2AV.1.5
Pages:
550 - 553
ISBN:
978-88-89407-52-3
Paper DOI:
10.5071/22ndEUBCE2014-2AV.1.5
Price:
FREE
