Open AccessEffect of Equivalent Ratio Variation on a Two-Stage Distributed Combustion
Author(s) -
Seekharin Komonhirun,
Pisit Yongyingsakthavon,
Songrit Tanchatchawan,
Udomkiat thakeaw
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/886/1/012001
Subject(s) - combustor , combustion , stage (stratigraphy) , diesel fuel , nox , range (aeronautics) , automotive engineering , environmental science , process engineering , materials science , computer science , chemistry , engineering , composite material , geology , paleontology , organic chemistry
Distributed combustion is a recent technology that has a feasibility to apply on the industrial scale. It provides relatively low combustion temperature with rather uniform distribution and very low emission (NOx). The two-stage distributed combustion system is established to reduce the complexity of operating in the industrial application. The operation range of this combustion system is governed by the equivalent ratio of the first and second-stages of combustion. This research is attempted to study the effects of equivalent ratio and to identify the operation range of the combustion system. There are two stages in this experiment: 1. To set up using a diesel combustor (first-stage) 2. To use an LPG distributed combustor (second-stage). Part of the aim of this project is to improve the efficiency of the single-stage diesel combustor. The air to fuel ratio of the first-stage combustor is controlled to provide the 5% excess oxygen for the second-stage combustor. The equivalent ratio of the second-stage is varied as 1, 0.9, 0.8, 0.7 and 0.6. The results have shown that stoichiometric distributed combustion yields the highest outlet temperature and first and second law efficiency. The temperature is decreased when reducing the equivalent ratio. Finally, this research also provides the formula that can be used to determine the appropriate operating range in the term of A/F for the two-stage distributed combustion system conveniently applied to the single-stage available in the industrial.