Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Test chambers comparison

Salthammer, T. and Mentese, S. (2008) Comparison of analytical techniques for the determination of aldehydes in test chambers. Chemosphere, 73,1351-6. [Pg.18]

Colombo, A., De Bortoli, M., Knoppel, H., Schauenburg, H. and Vissers, H. (1990) Determination of volatile organic compounds emitted from household products in small test chambers and comparison with headspace analysis, in Walkingshaw, D.S. (ed) Proceedings of the 5th International Conference on Indoor Air and Climate, Toronto, Canada, Vol. 3 (ed. D.S. Walkinshaw), Vol. 3, pp. 599-604. [Pg.369]

With the aid of emission test chamber measurements (see Chapter 5) emissions from electronic devices can be determined without any environmental influences affecting results. Such investigations aim at determining device-specific emission rates under standardized environmental conditions. Using these emission rates it is possible to make comparisons between the emission characteristics of different devices not only qualitatively (the composition of the emissions) but also quanti-... [Pg.408]

VOCEM (1998) Further development and validation test chamber method for measuring VOC emissions from building materials and products. Champs sur Marne (Marne la Vallee, VOCEM) (SMT4-VT95-2039 interlaboratory comparison report)... [Pg.34]

The authors of this chapter used different types of test chambers (Fig. 1.3-1) for comparison reasons 1-m stainless steel chambers, 0.02-m glass chambers and... [Pg.33]

Comparison between the three types of test chambers showed good agreement only for the concentration of dichlofluanid in the 1-m and 0.02-m chambers. For the 0.625-1 chambers problems occurred due to leaks because of unsufficient tightness. Permethrine and tebuconazole concentrations in the 1-m chamber did not rise to the same level as in the 0.02-m chamber within the testing time of 125 days. Probably the ratio of chamber inside surface to the surface of the test specimen was too large in the 1-m chamber to get an air/surface equilibrium during that time. [Pg.42]

Salthammer T. (1996b) VOC emissions from cabinet furnitures. Comparison of concentrations in the test chamber and in the cabinet. In Yoshizawa S., Kimura K., Ikeda K., Tanabe S. and Iwata T. (eds) Proceedings of the 7th International Conference on Indoor Air and Climate, Vol. 3, 567-572, Nagoya. [Pg.217]

Figure 22.27 (Up) CO combustion on Sn02-based sensors as determined by EC and IR. (a) Raw signals of EC and IR sensors for incoming CO concentrations between 50 and 500 ppm, reproduced from [30] by permissions of Shaker Verlag. (b) Comparison of the amounts of combusted CO and produced CO2 as determined by EC and IR. Principle of simultaneous consumption and resistivity measurements, reprinted from [162], copyright (2001), with permission from Elsevier. (Bottom) Incoming (supplied by gas mixing system) and outgoing (through the test chamber) concentrations of NO2/NO are compared. NO2 combustion as determined by NO c chemiluminescence analyzer [150]... Figure 22.27 (Up) CO combustion on Sn02-based sensors as determined by EC and IR. (a) Raw signals of EC and IR sensors for incoming CO concentrations between 50 and 500 ppm, reproduced from [30] by permissions of Shaker Verlag. (b) Comparison of the amounts of combusted CO and produced CO2 as determined by EC and IR. Principle of simultaneous consumption and resistivity measurements, reprinted from [162], copyright (2001), with permission from Elsevier. (Bottom) Incoming (supplied by gas mixing system) and outgoing (through the test chamber) concentrations of NO2/NO are compared. NO2 combustion as determined by NO c chemiluminescence analyzer [150]...
The required moisture conditioning time depends on specimen thickness, difiusion coefficient, and temperature. While it can be calculated, it is best measured. Fig. 1 shows the free moisture swelling strain as a function of time for FM 300K at 50 °C. The specimen was equilibrated for two weeks at 17% RH at which time the silica gel was then replaced with new gel pre-conditioned to 92% RH. After 24 hours the specimen had reached about 95% of its final moisture content Still, in the present study all (0.3 mm thick) specimens were conditioned in environmental chambers for two weeks prior to testing. In comparison, Ishida and Allen [4] and Ishida [5] reported that about 100 days... [Pg.75]

To compare the relative acoustic performance of the TPV and EPDM bulb design seals, tests measuring insertion loss (IL) [3] and road tests measuring sound pressure level (SPL) are performed. The IL test set-up is shown in Figure 3 [5] and performed at the Kolano and Saha Engineers, Inc. test chamber in Waterford, MI. If the installed bulb shapes are essentially the same, the results can be considered a direct comparison of the materials. [Pg.2008]

Table XI presents the results of tests on the same materials in the NBS smoke chamber. It is immediately clear that these results do not correlate well with those measured on the RHR apparatuses. Furthermore, an attempt at a linear correlation between the flaming mode specific maximum optical density and the Cone calorimeter SmkPar at 20 kW/m2 yielded a correlation coefficient of ca. 1%, a coefficient of variation of 217% and statistically invalid correlations. A comparison between a Cone and OSU calorimeter correlation and one with the NBS smoke chamber is shown in Figure 4. This suggests that unrelated properties are being measured. Table XI presents the results of tests on the same materials in the NBS smoke chamber. It is immediately clear that these results do not correlate well with those measured on the RHR apparatuses. Furthermore, an attempt at a linear correlation between the flaming mode specific maximum optical density and the Cone calorimeter SmkPar at 20 kW/m2 yielded a correlation coefficient of ca. 1%, a coefficient of variation of 217% and statistically invalid correlations. A comparison between a Cone and OSU calorimeter correlation and one with the NBS smoke chamber is shown in Figure 4. This suggests that unrelated properties are being measured.
The trend observed in Fig. 17.5 illustrates the importance of swirl. The image sequence corresponds to data points using front swirl angles of 31°, 41°, and 68° with all other parameters fixed 4> = 0.68, RMS = 0.1, L = 12 in. (30.48 cm), total mass flow rate of 0.03 kg/s, and rear swirl angle of 85°). The chamber averaged swirl is defined as the sum of the front and rear drive angular momentum divided by the chamber radius and total mass flow. This provides a measure of the swirl experienced by the combustion chamber confined flow and allows comparison between different test conditions. The flame speed ratio... [Pg.276]

Colombo, A. and Bortoli, M. (1992) Comparison of models used to estimate parameters of organic emissions from materials tested in small environmental chambers. Indoor Air, 2, 49-57. [Pg.113]

Wolkoff, P., Salthammer, T. and Woolfenden, E. (2005) Emission cells and comparison to small chambers for materials emission testing. Gefahrstojfe-Reinhaltung der Lufi, 65, 93-8. [Pg.115]

Afshari, A., Lundgren, B. and Ekberg, L.E. (2003) Comparison of threee small chamber test methods for VOC emission rates from paint. Indoor Air, 13, 156-65. [Pg.144]


See other pages where Test chambers comparison is mentioned: [Pg.139]    [Pg.139]    [Pg.411]    [Pg.35]    [Pg.249]    [Pg.61]    [Pg.220]    [Pg.684]    [Pg.25]    [Pg.91]    [Pg.240]    [Pg.240]    [Pg.238]    [Pg.915]    [Pg.323]    [Pg.301]    [Pg.151]    [Pg.304]    [Pg.210]    [Pg.339]    [Pg.284]    [Pg.468]    [Pg.506]    [Pg.301]    [Pg.224]    [Pg.133]    [Pg.27]    [Pg.157]    [Pg.156]    [Pg.143]   
See also in sourсe #XX -- [ Pg.42 ]




SEARCH



Testing chamber

© 2024 chempedia.info