## 3 Results
### Tests of Other Extinguishing Agents
#### 3.4.5 Carbon Dioxide CO\({}_{2}\)  
Figure 15 shows the results obtained in this test. The ambient temperature at the time the test was carried out was 12.6 \({}^{\circ}\)C. The first thermocouple to register an increase in temperature is T2 thermocouple due to its proximity to the source of the fire. After just over a minute, the measurement limit of 400 \({}^{\circ}\)C is reached, which allows to foresee, due to the high temperatures, that the fire has not been extinguished in time and has spread to the rest of the surrounding boxes. This is confirmed with the data recorded by the rest of the thermocouples close to the pyrotechnic charge since, in all cases, temperatures exceed 100 \({}^{\circ}\)C. The high temperatures are maintained over time despite the action of the extinguishing agent, which indicates that this extinguishing agent is not suitable for use in automatic fire extinguishing systems in establishments selling pyrotechnic products. In other words, the warehouses where this extinguishing agent is used are unprotected against fires. Once the test was completed and by visually reviewing the warehouse, it was confirmed that the fire had spread to the rest of the adjacent boxes, having started all the pyrotechnic articles.  
Figure 13: Temperature recording in the water mist Hi-Fog test.  
The storage and handling of pyrotechnic products can be dangerous due to the high risk of fire and explosion. Pyrotechnic mixtures contain their own oxidizer, making them highly reactive and more prone to catching fire. Once a fire starts, it can be difficult to extinguish as it can spread quickly and easily to nearby packages, resulting in a larger fire and greater danger.  
To prevent fires in pyrotechnic warehouses, it is crucial to have effective fire prevention measures in place, such as rapid detection and automatic extinguishing systems. Extinguishing agents play a crucial role in controlling and extinguishing fires in pyrotechnic  
Figure 14: Temperature recording in the gas tests. (**a**) FE 13 gas test. (**b**) FM 200 gas test.  
Figure 15: Temperature recording in the CO\({}_{2}\) test.  
warehouses. However, not all extinguishing agents are equally effective in extinguishing fires caused by pyrotechnic products.  
In tests carried out to evaluate the effectiveness of different extinguishing agents, water and foam were found to be the most effective in extinguishing fires caused by fountain-type pyrotechnic articles. Water, in the form of automatic sprinklers and bottled water mist, was particularly effective in preventing the spread of fire to nearby packages. The higher the water supply pressure, the better the results in extinguishing the fire. Nebulized water was also effective, but it is important to ensure proper sizing in relation to the amount of bottled water and the type of nozzle installed.  
Other extinguishing agents, such as gases, were found to be insufficient in preventing the spread of fire inside the premises. These systems do not have enough refrigeration capacity to prevent the spread of fire inside pyrotechnic warehouses and should not be considered as effective fire prevention measures.  
In conclusion, it is essential to have appropriate fire prevention measures in place to prevent fires in pyrotechnic warehouses. Rapid detection and automatic extinguishing systems, combined with effective extinguishing agents, such as water and foam, can help to control and extinguish fires caused by pyrotechnic products. However, the use of insufficient extinguishing agents, such as gases, should be avoided as they do not have the necessary cooling capacity to prevent the spread of fire.