Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

APPLICATION OF DOWNDRAFT COMBUSTION TO WOODBURNING DEVICES

Get access (open in a dialog) DOI: 10.1615/IHTC9.620
pages 157-162

Abstrakt

Woodburning cookstoves, to be used in developing countries, should ideally use less wood than the traditional stoves and, in addition, produce less environmental pollution and possible health hazards to the users. In a classical stove, the flow of fuel and air are counter current. During combustion, the endothermic reactions in the charcoalbed reduce the gas temperature and the charging of fresh fuel and entry of secondary air cool down the volatile mixture. As a result the combustion quality is very poor. The function of a chimney in these stoves is only to bring the pollutants out of the kitchen environment. In the present design of the downdraft stove, the flow of air and fuel are in the со−current mode. In this stove a shorter chimney is used to provide the necessary draught for inducing air and volatiles to flow downwards through the charcoalbed, where it burns homogeneously. This leads to a very good quality of combustion. In this paper some test results on 2 systems − cookstove and bread bakery oven − are presented.