Abstract: In order to effectively reduce the temperature of hot aerosol fire extinguishing agent and optimize the performance of aerosol fire extinguishing agent as much as possible, the influence of 9 kinds of chemical cooling agents on the temperature of aerosol fire extinguishing agent with the content of 3%, 5% , 7% and 9% is focused, and the changes of residue rate, mass burning rate and fire extinguishing time are considered. The release performance of chemical cooling agent modified aerosol fire extinguishing agent was comprehensively studied. The results show that the addition of chemical cooling agent has obvious cooling effect and can effectively shorten the fire extinguishing time, and ammonium oxalate has the best cooling effect. The residue rate will increase with the increase of the content of cooling agent. Basic magnesium carbonate and boric acid can obviously reduce the mass burning rate of fire extinguishing agent, while potassium carbonate and potassium bicarbonate can increase the mass burning rate of fire extinguishing agent.

Key words: aerosol fire extinguishing agent, mass burning rate, residue rate, temperature, chemical cooling agent