Active Standard: E1623 - 11
E1623 is in consideration of being withdrawn due to the fact that the radiant heaters cited are no longer available. A new ICAL apparatus has been constructed using an alternate design of radiant heaters that is very similar to the original radiant heaters cited in E1623. For reference, the ICAL radiant panel consists of an array of smaller radiant burners. This new design uses radiant heaters that are simply different in size but operate in the same fashion as the original heaters. Each burner is comprised of a plenum space in which the natural or propane gas is injected at a controlled rate by the burners control system. Combustion air is aspirated into the plenum space through the gas and air injection port. This results in an ICAL radiant panel that is slightly different in size from the original design, but meets the heat flux calibration requirement quite well. Previous ballots to allow alternate radiant panels have failed due to negative voters requiring that the new panel design produce results within tolerance of previous round robins. From a technical point of view, the results are measured using the Oxygen Consumption Calorimeter based on ignition of the specimen from a controlled radiant heat source (The ICAL Radiant Panel). An alternate radiant panel is simply an alternate radiant heat source that meets the heat flux calibration requirements, and does not affect how a specimen burns (time to ignition and heat release rate curve). In order to avoid future episodes such as this, the exact design of the new radiant panel is not being balloted. If the new radiant heaters become obsolete, we will end up in a similar situation. Instead, the ballot allows alternate designs of radiant heaters (but maintaining the same burner principle) to be used to build an array of burners (ICAL Radiant Panel) with a specific dimensional limit.
Keywordseffective specific heat; effective thermal conductivity; emissivity; heat release rate; ignitability; intermediate scale calorimeter; mass loss rate; oxygen consumption method; smoke release rate; surface temperature; Effective heat of combustion; Effective specific heat; Combustion; Effective thermal conductivity; Emissivity; Equations; Exhaust system design; Fire testing--building materials; Heat release; Ignition--building materials; Infrared pyrometer; Intermediate scale calorimeter (ICAL); Mass loss testing; Oxygen consumption; Radiant heat panels; Smoke release rate; Surface temperature; Thermal conductance/conductivity; Time to ignition (t
Draft Under Development