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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=1959.4/resource/collection/resdatac_592/1&rft.title=Porous Media Reactor Temperature Data&rft.identifier=1959.4/resource/collection/resdatac_592/1&rft.publisher=University of New South Wales&rft.description=Temperature recordings collected from the porous media reactor using S-type and K-type thermocouples and the SignalExpress Software&rft.creator=Gentillon Molina, Philippe &rft.creator=Southcott, Jake &rft.creator=Chan, Shaun &rft.creator=Taylor, Robert &rft.date=2018&rft_rights=Copyright 2018 Philippe Andre Gentillon Molina&rft_rights=Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/&rft_subject=Energy Generation, Conversion and Storage Engineering&rft_subject=Engineering&rft_subject=Mechanical Engineering&rft_subject=Energy Not Elsewhere Classified&rft_subject=Energy&rft_subject=Other Energy&rft_subject=Porous Media Combustion&rft_subject=Thermophotovoltaics&rft.type=dataset&rft.language=English Access the data

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Copyright 2018 Philippe Andre Gentillon Molina

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Temperature recordings collected from the porous media reactor using S-type and K-type thermocouples and the SignalExpress Software

Notes

In order to initiate the reactor, the following procedure based on Bubnovich et al. [1] and Mathis and Ellzey [2] was used. Note that the units of nlpm (normal litres per minute) were adopted in this study and that all the experiments were carried out using 273.15 K and 1 atm as the reference temperature and pressure.

First, the water tap for the water-cooling system was opened. After that, the mass flow controllers were set for a volumetric flow rate of 9.48 nlpm (500 kW/m2) for stoichiometric combustion. Once the flows were stabilized the reactor was ignited from the top. After the first type S thermocouple (A) reached its peak temperature (this condition is detected on SignalExpress when the temperature begins to decrease), the equivalence ratio was set to 0.7 and the firing rate was adjusted to the desired value by changing the flow rates using the mass flow controllers. After a few minutes the flame usually moved upstream. Once the flame reached the interface zone (i.e. maximum temperature between thermocouple B and C), a stabilizing period of 20 minutes was required for flame stabilization. If within that period of time the flame moved upstream, a flashback event was recorded. If a stabilized flame was found, then the firing rate was reduced by 100 kW/m2 each time, until flashback was found. Then, the firing rate was increased back to starting value and wait for steady state conditions and rise the firing rate by 100 kW/m2 and wait for steady state conditions. This was repeated until the blow off limit was found. If the firing rate was too high that compromises some hazard, such as breaking the quartz due to high temperature the reactor was shut down and no blow-off limit is found. Once all the test cases have been recorded, the air gas ball valve was closed first to avoid flashback. Next, the fuel valve was closed immediately after. After this, the cooling water was continued for an additional 15 minutes as part of the cool down protocol.

[1] V. Bubnovich, M. Toledo, L. Henríquez, C. Rosas, and J. Romero, “Flame stabilization between two beds of alumina balls in a porous burner,” Appl. Therm. Eng., vol. 30, no. 2–3, pp. 92–95, Feb. 2010.
[2] W. M. Mathis and J. L. Ellzey, “Flame stabilization, operating range, and emissions for a methane/air porous burner,” Combust. Sci. Technol., vol. 175, no. 5, pp. 825–839, May 2003.

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