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A note on the lithosphere thickness and heat flow density of the Indian Craton from MAGSAT data

100%

Sarkar R. , Saha D. , Saha D.

2006

tom Vol. 54, no. 2

198-204

The Curie depth map of India compiled from MAGSAT data has been used for preparing the lithosphere thickness and the surface heat flow density maps of the Indian Craton, utilizing the concept of magnetothermometry. The lithosphere thicknesses of the major Indian geological units/provinces, as obtained from the prepared map, are found to be in reasonably good agreement with the previously published values for these regions. Also, the surface heat flow density values ob-tained from the prepared maps closely follow the previously published results. The maps are useful in providing first order estimates of lithosphere thickness and sur-face heat flow density of the important geological units/provinces of India.

Zastosowanie miernika gęstości strumienia ciepła do oceny dynamiki spieniania poliuretanów

86%

Trzyna M. , Zygmunt B. , Koniorczyk P. , Zmywaczyk J. , Preiskorn M.

tom T. 92, nr 6

975--979

Kamera termograficzna jako narzędzie do ilościowego określania gęstości strumienia ciepła

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Wróbel A. , Wróbel A. , Kwartnik-Pruc A. , Ortyl Ł.

tom R. 55, nr 11

938-941

Przeprowadzono badania doświadczalne mające na celu wykazanie równoważności określania gęstości strumienia ciepła przy pomocy ciepłomierza i techniki termografii. Pomiary doświadczalne przeprowadzono w komorze klimatycznej. Badano korelacje pomiędzy wartością gęstości strumienia ciepła pomierzoną ciepłomierzem i obliczoną na podstawie pomiarów termograficznych. Wartość współczynnika korelacji dla badanych przegród wynosi 0.95÷0.99. Wynika stąd, że dokładność pomiaru kamerą termograficzną jest wystarczająca do pomiarów ilościowych w budownictwie.

Determination of thermal properties of building partitions is becoming more important as the requirement for building certification is becoming obligatory. Data for energetic qualification of buildings is taken from their projects. This is a problem in case of old buildings, where there is usually no documentation. Thermography can be used for determination of the actual heat transfer coefficient, which can be useful for thermal assessment of such buildings. The existing norms say that thermography may be used for qualitative evaluation of building partitions. For the quantitative analysis, heat flow is measured with heat flow meters. Conducted investigations show that heat flow measurement with a thermographic camera is equivalent to a measurement taken with a heat flow meter. The investigations were performed in a climate chamber for four real-life partitions. The analyzed partitions were made with use of typical technologies. They differ in ability of heat accumulation. The measurements of the heat flow density were made with use of a heat flow meter. Thermographic cameras were used to record the surface temperature image and air temperature (Fig. 1). The heat flow density determined with the thermographic method had been calculated from formula (2). The correlation between the heat flow density measured by the heat flow meter and that calculated from the thermographic measurements was analyzed. The value of the determination coefficient R2 for the analyzed partition was between 0.91 and 0.99; while the correlation coefficient R between 0.95 and 0.99 (Tab. 1). The conclusion drawn from the investigations is that the accuracy of temperature difference measurements with use of a thermographic camera is good enough to be used for quantitative measurements.