Get Hot on Combustion
Energy in the form of heat is obtained when fuel is burnt in air. The release of this heat energy can be slow or can be very rapid. When fuel oil is sprayed as a fine mist in the boiler burners, it is able to burn at a relatively slow rate. When fuel is sprayed into the cylinders of diesel engines, the fuel burns in such a rapid rate that explosions occur. Fortunately, these explosions are protected from persons as these engines are called internal combustion engines. Whatever type of combustion, it is a chemical reaction between carbon, hydrogen, sulphur and oxygen. C + O2 = CO2
2CO + O2 = 2CO
2H2 + O2 = 2H2O
S + O2 = SO2
2S + 3O2 = 2SO3 Air consists of 77% Nitrogen and 23% Oxygen by mass. For a particular design of combustion air, the theoritical oxygen multiplied by 100/23 will give the theoritical air required. How do you measure a good combustion. The percentage of Oxygen or Carbon Dioxide will tell us whether the combustion is good or not good. The lower the Oxygen content in the exhaust gas, the better the combustion. It means that the Oxygen has been fully utilized for burning. It also means that the fuel air ratio is set properly. Too much excess air is no good because the heat generated will be lost through the exhaust trunking. Boilers are able to achieve a good combustion. Oxygen content percentage of up to 5% or lower can be achieved. Internal combustion engines have a lot of excess air because mixing of the combustible mixture is a challenge for them. Furthermore, the combustion is meant to provide the power to drive the pistons. The burning of sulphur in the fuel is a problem for combustion equipment. This is because the byproducts of combustion will create sulphur dioxide and sulphur trioxide. These will react with the water, also a byproduct of combustion of Hydrogen to form sulphuric acid and sulphurous acid. SO3 + H2O = H2SO4
SO2 + H2O = H2SO3
2H2SO3 + O2 = H2SO4 However, the effects of corrosion, called low temperature corrosion can be avoided by keeping the temperature above the dewpoint. That means to keep the exhaust temperature high so that water droplets will not form on the exhaust ducts. Folks, get hot! Until next time? "Attract CUSTOMERS With Smells!" Irresistible smells of pheromone fragrances draws on the basic instincts of persons. Make use of nature's attractant! And discover the power of fragrant attraction in your business world! http://www.free-marine.com/linklovescent.htm Many years of working experience in Marine, Facilities, Construction has given the author material for writing e-books and articles related to engineering, and management. Subscribe to facworld ezine at mailto:facworld-subscribe@yahoogroups.comMore information at http://www.free-marine.com and http://www.free-engineering.com
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Higher education, with yogaGlobe and Mail, Canada - 17 hours ago... a gymnasium and a 1700-seat varsity centre that can host convocation ceremonies, as well as dozens of dance, fitness and yoga studios. ... |
The medicinal powers of yogaCBC.ca, Canada - Sep 5, 2008But medical research that's been accumulating over the past 10 to 15 years is showing that yoga can provide health benefits that many people may not realize ... |
Reaching out through yogaFort Wayne Journal Gazette, IN - 14 hours agoShe also hopes it can change the world, which is why the Indiana native founded the non-profit Yoga World Reach (www.yogaworldreach.org) in Vail, Colo., ... |
Yoga At Cranberry Lake PreserveWestchester.com, NY - 21 hours agoThen join certified Kripalu Yoga instructor Franklin Shire for an outdoor morning session, Saturday, September 13, 9:30 am at Cranberry Lake Preserve in ... |
Princess Offers In-Room Fitness, Yoga for KidsCruise Critic, NJ - Sep 5, 2008Princess Offers In-Room Fitness, Yoga for Kids Princess Cruises is expanding its onboard spa and fitness offerings. Among them: In an industry first-ever, ... |
Yoga - Google News
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