Fire has been used by humans for at most 1.5 million years, but now everyone either uses or experiences fire in some way. Wood needs a base temperature of 356 ℉ to ignite, but normally there's more to it than that. Most wood has water inside it and fire cannot burn with water, so a fire will heat the wood to a temperature of 212℉, so that the water inside the wood boils and escapes as steam (Synonym ). As wood dries, at 572℉ it begins to release combustible gases that ignite when they contact an open flame. The gases then burn slowly raise the temperature to around 1100℉. When wood burns its releasing energy that it has been stored for years. As the tree grows, it catches the sunlight and uses it to combine water and carbon dioxide
…show more content…
There is an fairly broad agreement that flashover is reached when the average upper gas temperature in the room exceeds about 1200℉. Flashover is the instance of a fire spreading rapidly across a gap because of intense heat. There are zones of around 1650 ℉ flame temperatures, but wide spatial variations will be seen. The peak value of a fire´s temperature is governed by ventilation and fuel supply characteristics. This value turns out to be around 2200℉, although a typical post-flashover room fire is more common around …show more content…
High moisture content slows the burning process since heat from the fire must first expel moisture. Wood burns differently depending on its density. Hardwoods such as, hickory, red, and white oak, and sugar maple typically burn longer and give off more heat than softwoods such as redwood, cottonwood and aspen. Green wood gives off about half as much temperature as dry, seasoned wood due to its moisture content. The color of a wood flame is a indicative of its temperature. A deep red fire burns at roughly 600℉, while an orange-yellow flame burns around 2012℉. Fire is an interesting subject and it has many interesting qualities. Flames are hollow and pointed. They consist primarily of carbon dioxide, water vapor, oxygen, and nitrogen. If a flame was lit in a micro-gravity environment such as space, the flame would form a sphere! Flame color depends on the temperature of the flame. The hottest part of a flame, the base, glows blue, and the cooler parts are orange and
There is an fairly broad agreement that flashover is reached when the average upper gas temperature in the room exceeds about 1200℉. Flashover is the instance of a fire spreading rapidly across a gap because of intense heat. There are zones of around 1650 ℉ flame temperatures, but wide spatial variations will be seen. The peak value of a fire´s temperature is governed by ventilation and fuel supply characteristics. This value turns out to be around 2200℉, although a typical post-flashover room fire is more common around …show more content…
High moisture content slows the burning process since heat from the fire must first expel moisture. Wood burns differently depending on its density. Hardwoods such as, hickory, red, and white oak, and sugar maple typically burn longer and give off more heat than softwoods such as redwood, cottonwood and aspen. Green wood gives off about half as much temperature as dry, seasoned wood due to its moisture content. The color of a wood flame is a indicative of its temperature. A deep red fire burns at roughly 600℉, while an orange-yellow flame burns around 2012℉. Fire is an interesting subject and it has many interesting qualities. Flames are hollow and pointed. They consist primarily of carbon dioxide, water vapor, oxygen, and nitrogen. If a flame was lit in a micro-gravity environment such as space, the flame would form a sphere! Flame color depends on the temperature of the flame. The hottest part of a flame, the base, glows blue, and the cooler parts are orange and