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In a watertube boiler, heat and combustion gases pass through the tubes that contain water. The combustion occurs in a furnace or combustion chamber, where the hot gases flow around and between the water-filled tubes, transferring heat to the water. This heat exchange causes the water to boil and produce steam, which can then be used for various applications. The design allows for efficient heat transfer and high pressure capabilities.
What else can I help you with?
Will all types of heat transfer takes place in boiler furnace?
Yes, all three types of heat transfer—conduction, convection, and radiation—occur in a boiler furnace. Conduction happens through solid materials, such as the furnace walls, where heat is transferred from hot gases to the metal. Convection occurs as hot gases circulate and transfer heat to the water or steam inside the boiler. Radiation plays a role as well, especially at high temperatures, where thermal energy is emitted from hot surfaces and absorbed by surrounding materials.
How does convection take place in your boiler?
In a boiler, convection occurs when heated water or steam rises naturally due to its lower density, creating a convection current. This helps to transfer heat from the combustion gases to the circulating water or steam. The heated water or steam then moves towards the radiators or other heat transfer surfaces, releasing heat and cooling down to create a continuous cycle of convection.
What is the experimental molar heat of combustion?
The experimental molar heat of combustion is the heat released by the total combustion of a substance, determined in a calorimeter.
What do you call the heat released when 1 mole of a substance undergoes complete combustion?
You think probable to molar heat, expressed in J/mol.
What type of material can cause combustion of other materials?
Materials such as flammable gases, liquids, and solids can cause combustion of other materials. Common examples include gasoline, alcohol, papers, wood, and certain metals. Exposure to heat or an ignition source can trigger a chemical reaction leading to combustion.
Were do the baffle plates go in a oil boiler?
In an oil boiler, baffle plates are typically installed within the combustion chamber or heat exchanger. Their primary function is to direct the flow of flue gases, enhancing heat transfer efficiency and promoting better combustion. Proper placement of baffle plates ensures that the heat generated from burning oil is effectively utilized to warm the water or air being heated by the boiler.
What is the use of air preheater in boilers?
preheater is used to heat the air at Inlet of the furnace of Boiler By using Heat contents of Exhaust gases. This will minimize the fuel Consumption.
Is a boiler an internal combustion engine?
No, a boiler is not an internal combustion engine. A boiler is a closed vessel that uses heat to generate steam or hot water for heating or power. Internal combustion engines, on the other hand, are machines that generate power by burning fuel within a combustion chamber.
What is a water leg in a boiler?
It is the small space between two plates having water and at the other side of the plate hot gases are available to transfer heat to the boiler water. In fire tube boiler space between end plate and combustion chamber's end plate is called water leg.
What are the three products of combustion?
heat, smoke, toxic gases
What is function of economizer in boiler?
Basically . economiser is located in between exit of boiler and entry of air preheater. when the flue gases are coming out from boiler they take away a lot of heat. economiser utilize this heat from flue gases. and these heat is used to heat the feed water which is going to feed the bolier. hence by using economiser the coal consumption required to heat the feed water is reduced hence cost reduced.
Why economiser is used in boiler?
An economizer is used to heat boiler feedwater up closer to the temperature of the boiler water, using heat from the boiler exhaust gases, heat that would otherwise be wasted. The main reason is to improve the efficiency of the boiler. For every 44 degree F drop in exhaust gas temp. there is an 11 F rise in feedwater temperature and a 1% gain in boiler efficiency.
How much useful energy does a gas boiler waste?
Probably about 25 percent of the heat of combustion goes up the stack
How superheater work?
A superheater is a component in a steam-generating boiler that increases the temperature of steam above its saturation point. This is achieved by passing the steam through a series of tubes located in the boiler's combustion chamber, where it absorbs additional heat energy from the combustion gases. Superheated steam is dryer, more stable, and has higher energy content than saturated steam, making it more efficient for various industrial processes.
Why direction of water and flue gases are opposite in bacock and wilcox boiler?
because of heat transfer rate is better
How is energy wasted in a gas boiler?
Energy is wasted in a gas boiler through heat loss in the combustion process, inefficiencies in transferring heat to the water, and losses from standby heat when the boiler is not in use. These inefficiencies can lead to higher fuel consumption and increased energy costs. Regular maintenance and proper insulation can help reduce energy waste.
What is the working of economizer in a boiler plant?
Economizer is a device in which the waste heat of the fuel gases is utilized for heating the feed water.
