New technique of the local heat flux measurement in combustion chambers of steam boilers

Archives of Thermodynamics

Tomasz SobotaChair of Thermal Power Engineering, Cracow University of Technology, al. Jana Paw?a II 37, 31-864 Kraków, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Piotr DzierwaChair of Thermal Power Engineering, Cracow University of Technology, al. Jana Paw?a II 37, 31-864 Kraków, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Jan TalerChair of Thermal Power Engineering, Cracow University of Technology, al. Jana Paw?a II 37, 31-864 Kraków, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Dawid TalerInstitute of Heat Engineering and Air Protection, Cracow University of Technology, ul. Warszawska 24, 31-155 Kraków, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar² 

[1]Chair of Thermal Power Engineering, Cracow University of Technology, al. Jana Paw?a II 37, 31-864 Kraków, Poland

[2]Institute of Heat Engineering and Air Protection, Cracow University of Technology, ul. Warszawska 24, 31-155 Kraków, Poland

关键词: Keywords: Heat flux measurement;    Inverse heat conduction problem;    Steam boiler;    Slagging of combustion chambers;    CFD simulation;   

DOI  :  10.2478/v10173-011-0016-2

学科分类：能源（综合）

来源: Polska Akademia Nauk * Oddzial w Gdansku, Instytut Maszyn Przeplywowych / Polish Academy of Sciences, Institute of Fluid-Flow Machinery

【 摘 要 】

A new method for measurement of local heat flux to water-walls of steam boilers was developed. A flux meter tube was made from an eccentric tube of short length to which two longitudinal fins were attached. These two fins prevent the boiler setting from heating by a thermal radiation from the combustion chamber. The fins are not welded to the adjacent water-wall tubes, so that the temperature distribution in the heat flux meter is not influenced by neighbouring water-wall tubes. The thickness of the heat flux tube wall is larger on the fireside to obtain a greater distance between the thermocouples located inside the wall which increases the accuracy of heat flux determination. Based on the temperature measurements at selected points inside the heat flux meter, the heat flux absorbed by the water-wall, heat transfer coefficient on the inner tube surface and temperature of the water-steam mixture was determined.

【 授权许可】

Unknown