Details

Title:

Transient CFD Simulation of Wood Log Stoves with Heat Storage Devices

Author(s):

Benesch, C., Blank, M., Scharler, R., Kössl, M., Obernberger, I.

Document(s):

Abstract:

Wood log fired stoves increasingly constitute effective heating systems due to new innovative concepts including heat storage devices. These devices accumulate a certain fraction of the heat released in a special storage medium for a certain period of time and release it after opening of discharge channels. The combustion of wood logs in small­scale stoves itself is a highly transient and complex process and the transient character of the operation of wood log stoves becomes even more important, when a heat storage system is included. The operation of a heat storage device is divided into 3 phases: heat­up, heat storage and heat discharge. We developed an innovative methodology based on transient CFD simulations in order to analyse the transient heat­up/heat discharge processes in heat storage devices. Selected results are presented including the heating rate of the storage material during the heat­up, the energy release during the storage and the discharging rate during the discharge phase. The influence of the air­flow in the discharging channels and the flue gas flow in the charging channels as well as material properties on the charging/discharging processes is discussed.

Keywords:

alternative energy, biomass, modelling, wood, stove, modeling

Topic:

R&D on Biomass Conversion Technologies for Heating, Electricity and Chemicals

Subtopic:

Solid biofuel combustion for small and medium scale applications

Event:

21st European Biomass Conference and Exhibition

Session:

2CO.7.1

Pages:

578 - 584

ISBN:

978-88-89407-53-0

Paper DOI:

10.5071/21stEUBCE2013-2CO.7.1

Price:

FREE