Tubular Type Heat Flux Meter for Monitoring Internal Scale Deposits in Large Steam Boilers

2007 ◽  
Vol 28 (3) ◽  
pp. 230-239 ◽  
Author(s):  
Jan Taler ◽  
Dawid Taler
Keyword(s):  
Heat Flux ◽  
Tubular Type ◽  
Steam Boilers ◽  
Heat Flux Meter ◽  
Scale Deposits ◽  
Internal Scale

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

2011 ◽  
Vol 32 (3) ◽  
pp. 103-116 ◽  
Author(s):  
Jan Taler ◽  
Dawid Taler ◽  
Tomasz Sobota ◽  
Piotr Dzierwa
Keyword(s):  
Heat Flux ◽  
Flux Measurement ◽  
Local Heat ◽  
New Technique ◽  
Combustion Chambers ◽  
Heat Flux Measurement ◽  
Water Wall ◽  
Steam Boilers ◽  
Local Heat Flux ◽  
Heat Flux Meter

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

Steady-state analysis of the zero-balance heat-flux meter

1995 ◽  
Vol 49 (1-2) ◽  
pp. 29-35 ◽  
Author(s):  
José Gabriel Poloniecki ◽  
Antoine Vianou ◽  
Emmanouil Mathioulakis
Keyword(s):  
Heat Flux ◽  
Steady State ◽  
Steady State Analysis ◽  
Heat Flux Meter ◽  
State Analysis

A heat flux-meter for ash deposit monitoring systems—I. Ash deposit prevention

1991 ◽  
Vol 34 (9) ◽  
pp. 2291-2301 ◽  
Author(s):  
Branislav Brajuskovic ◽  
Miodrag Matovic ◽  
Naim Afgan
Keyword(s):  
Heat Flux ◽  
Monitoring Systems ◽  
Ash Deposit ◽  
Heat Flux Meter

New Vacuum Blackbody Cavity for Heat Flux Meter Calibration

2008 ◽  
Vol 30 (1) ◽  
pp. 236-248 ◽  
Author(s):  
J.-R. Filtz ◽  
T. Valin ◽  
J. Hameury ◽  
J. Dubard
Keyword(s):  
Heat Flux ◽  
Blackbody Cavity ◽  
Heat Flux Meter

Identification of local heat flux to membrane water-walls in steam boilers

Fuel ◽  
2009 ◽  
Vol 88 (2) ◽  
pp. 305-311 ◽  
Author(s):  
Jan Taler ◽  
Piotr Duda ◽  
Bohdan Węglowski ◽  
Wiesław Zima ◽  
Sławomir Grądziel ◽  
...  
Keyword(s):  
Heat Flux ◽  
Local Heat ◽  
Steam Boilers ◽  
Local Heat Flux

Application of the heat flux meter in physiological studies

1993 ◽  
Vol 18 (5-6) ◽  
pp. 473-476 ◽  
Author(s):  
Zhang Xizhong ◽  
Dai Zizhu ◽  
Zhou Genhong
Keyword(s):  
Heat Flux ◽  
Heat Flux Meter ◽  
Physiological Studies

scholarly journals Quicker Measurement of Walls’ Thermal Resistance Following an Extension to ISO 9869 Average Method

2019 ◽  
Vol 111 ◽  
pp. 04019
Author(s):  
Arash Rasooli ◽  
Laure Itard
Keyword(s):  
Heat Flux ◽  
Thermal Resistance ◽  
Average Method ◽  
Large Scale ◽  
Accurate Determination ◽  
Acceptable Result ◽  
Heat Flux Meter ◽  
The Difference

Determination of the thermo-physical characteristics of the buildings’ components is crucial to illustrate their thermal behavior and therefore their energy consumption. Along the same line, accurate determination of the thermal resistance of the building walls falls into one the most important targets. Following the difference between in-lab, and on site thermal performance of walls, in-situ measurements have been highly recommended. The most well-known practice for in-situ measurement of walls’ thermal resistance is the Average Method of ISO 9869, using one heat flux meter and two thermocouples. The method, in comparison with other existing methods is quite straight-forward and therefore, is applied widely in large scale. Despite its simplicity, this method usually needs a relatively long time to reach an acceptable result. The current paper deals with a modification to the ISO 9869 method, making it in many situations much quicker than its original state. Through simulation of walls of different typologies, it is shown in which cases the measurement period becomes longer than expected. It is demonstrated how the addition of a heat flux meter to the aforementioned equipment can lead to a much quicker achievement of the thermal resistance, following the rest of the instructions of the standard method.

Sign in / Sign up

Export Citation Format

Share Document