Reaktionskrafter från strålrör

Like all businesses there is also an interest in the fire service to always improve the efficiency of its work. This can be done in many different ways, for example by changing the existing formation of the local rescue organization or through the continued development of current methods and equipment that firefighters use. Most rescue services across Sweden are currently using low pressure pumps during normal fire situations; these are connected to a standard hose outlay and with a standard pump pressure of 10 bars, which has turned out to work well for firefighting. However, several new studies shows that increased pressure can create a better extinguishing effect. This leads to the question about how high the pressure can be, before it is no longer manageable for a firefighter to handle with consideration to the occurring reaction force. This report investigated which reaction forces appear for different nozzles with different pressure and flow configurations. When this is done subjective assessments are used in order to establish an acceptable force for different types of nozzles. Based on all the experiments this report showed that different nozzles got different assessments regarded to what was manageable when the exact same reaction force arose. According to the tests a regular nozzle is easier to manage than a fog nozzle at equal forces

Brandteknisk riskvärdering av Arken Hotell & Art Garden Spa

When a fire starts in a building a great threat against personal safety arises and this is especially true for the cases where people are unaccustomed to their environments. To diminish this threat it’s of great importance that adequate time for evacuation is available. In this paper students at the Fire Protection Engineering program examine the system that is currently in place to ensure the safety of guests and personnel at Arken Hotel & Art Garden Spa. This is done by setting acceptable risk criteria, evaluating risks, determining available and required time, analyzing the effects of important factors and finally reaching a conclusion about personal safety. The method involves literature studies, calculations, simulations and logical thinking. Where the safety is found inadequate different solutions are examined and recommended. The examination shows that the safety of guests cannot be completely guaranteed in all parts of the hotel without a few building modifications to reach the acceptable criteria