Fire Ban Approved Outdoor Stove.

Sammanfattning: The extreme heatwave and draught summer 2018 led to extensive fire bans in Sweden, limiting the outdoor cooking possibilities. All equipment with an open flame were forbidden to use. Unfortunately, the trend of increasing temperatures and under average rainfall seems to stay, and not only in Sweden. The demand for outdoor stoves without an open flame is therefore growing and the existing solutions on the market today are limited. The overall goal of the project was to develop a fire ban approved outdoor stove for the Swedish company Primus. With a long tradition of producing gas outdoor stoves, Primus could benefit from offering the customers an alternative way of cooking during the hot and dry summers. A comprehensive research was carried out covering the areas of outdoor cooking, fire safety and heating solutions. Firemen and fire engineers were contacted, for further insights, as well as administrative authorities and professors. Several concept ideas were developed covering different heating technologies. After an inclusive evaluation it was decided to proceed with a chemical stove solution with water activated quicklime heating bags. A new round of research and refinement started and experiments were performed to confirm and explore the topic of heating bags and heat transferring. User interaction, construction and materials were decided on and the product was designed to fit the brand Primus. The project resulted in Primus Trailbreak Heater, a flameless cooking system, that works as an accessory product for Primus Lunch Jugs. Mounted between the thermos jug and lid, a compact and fire safe cooking solution is created. The heater is prepared with water and a Primus Heating Bag, and activated once the user turns the whole thermos up-side down. An exothermic reaction generates heat, which is transferred to the thermos content. Trailbreak Heater can be used as a complement to gas stoves, solely during fire bans and to heat boost thermos content during a long day outdoors. It suits trekkers and hikers, during day trips as well as longer excursions. The heater can boil water for coffee and dried food or heat up a meal. The amount of heating bags decide the number of available heating cycles.