Gexcon US Completes NFPA-Funded Project on Hazard Evaluation of A3 Refrigerants

Refrigerants Propane Explosion

Potential replacements for current hydrofluorocarbon (HFC) refrigerants include pure and blended hydrocarbon refrigerants since they have a lower global warming potential (GWP) and comparable working fluid properties. 

The current barrier to broader application of these refrigerants is their classification as flammable A3 substances according to ASHRAE 34. As a result, their use is accompanied by additional design constraints to minimize safety hazards.

A current design constraint for A3 refrigerants is a 150 g charge size limit in portable unit systems.

The objective of this project was to understand the severity of ignition events involving R-290 (propane) at charges sizes above the current limit of 150 g to evaluate the viability of class A3 refrigerants as replacements for HFCs in more HVAC&R applications.

Other Fire & Explosion Testing

New Paper shows CAM Model in Shell FRED performs well in predicting DDT

New Paper shows CAM Model in Shell FRED performs well in predicting DDT

The Shell FRED (Fire, Release, Explosion, and Dispersion) tool is a well-validated software tool for the prediction of the hazardous effects of accidental or intentional releases and is supported by over 40 years of physical testing and validation. A paper released in the July 2020 edition of the Journal of

News Shell
FLACS-CFD 20 coming soon

FLACS-CFD 20 coming soon

Gexcon is set to launch a major update to its flagship consequence modelling software later this year to offer users greater flexibility, digitalisation and integration capabilities. FLACS-CFD 20 will replace FLACS 10.9 from this autumn and represents a significant software upgrade, building on more than 40 years of industrial safety

FLACS-CFD News Software
Calling for Beta Testers of Shell FRED 2020

Calling for Beta Testers of Shell FRED 2020

Gexcon and Shell are excited to announce that we are working on a new version of Shell FRED for 2020. Shell FRED allows safety professionals to predict the consequences of Fire, Release, Explosion, and Dispersion from accidental and design releases of products from the process, storage, transport, and distribution operations.

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