A novel direct-fired porous-medium boiler

8th TSME-International Conference on Mechanical Engineering

Prasartkaew, Boonrit^1

Combustion and Solar Energy Laboratory (CASE Lab.), Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Klong 6, Thanyaburi, Patumthani

12110, Thailand^1

关键词: Combustion products;    Combustion reactions;    Generation systems;    High efficiency boilers;    Operating parameters;    Performance analysis;    Second Law of Thermodynamics;    Thermal efficiency;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/297/1/012058/pdf
DOI  :  10.1088/1757-899X/297/1/012058

来源: IOP

【 摘 要 】

Nowadays, power and heat generation systems pay an important role in all economic sectors. These systems are mainly based on combustion reaction and operated under the second law of thermodynamics. A conventional boilers, a main component of heat and power generators, have thermal efficiency in the range of 70 to 85%, mainly owing to they have flue gas heat loss. This paper proposes a novel type of boiler, called a Direct-fired Porous-medium Boiler (DPB). Due to being operated without flue gas heat loss, its thermal efficiency cloud be approximately close to 100%. The steam produced from the proposed boiler; however, is not pure water steam. It is the composite gases of steam and combustion-product-gases. This paper aims at presenting the working concept and reporting the experimental results on the performance of the proposed boiler. The experiments of various operating parameters were performed and collected data were used for the performance analysis. The experimental results demonstrated that the proposed boiler can be operated as well as the conceptual design and then it is promising. It can be possibly further developed to be a high efficiency boiler by means of reducing or suppressing the surface heat loss with better insulator and/or refractory lined.