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Any commercial or domestic boiler uses a heating element to provide heat to the water which is governed by heat transfer laws or thermodynamics. Since cold water is heavier than hot water, it remains at bottom and hot water occupies top portion of the storage tank. Thus heating elements are placed at the bottom. They are usually designed to heat water and do not provide good resistance to air. Oxygen oxidizes these elements and the rate of reaction increases with temperature. So, in order to avoid damage two water level indicators are used to govern the water in it. One to prevent overflow and other to prevent heating elements getting in contact with air, especially at high temperatures.
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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.
In which type of boiler you can find water walls?
A waterwall in a boiler is any furnace wall that is comprised of refractory and tubes in a water-tube boiler. The tubes are evenly spaced and generally connect to headers which in turn are connected back to the main generating bank of the boiler. They serve a two fold purpose here in that they capture heat that would otherwise escape to the atmosphere and help heat the water in the boiler. And they also help keep the refractory cool (relatively speaking) This prevents spalling of the refractory.
What is boiler?
boilers which are used in ships called as marine boliers.
What is the difference between a condensing central heating boiler and a combination boiler?
A combination boiler can use one of two different fuels to heat the water. Common combinations include natural gas/propane and oil, or wood and oil combinations. A condensing boiler uses a secondary heat exchanger to condense water vapour (steam) in the products of combustion down to water. Here's what that means: When any hydrocarbon (gas, propane, oil, even wood) burns, it gives off at least two "products of combustion. The carbon combines with oxygen to create CO2, carbon dioxide. The hydrogen combines with oxygen to create water vapour, or steam. (If combustion is "incomplete," there will be other trace products as well.) It's the water vapour or steam we're concerned with here. To boil 1 pound of water requires 960 BTUs of heat. Conversely, if you condense steam down into 1 pound of water, you will recover 960 BTUs. The fuel is burned in the "primary heat exchanger," where of course it releases a tremendous amount of heat into the water we're warming up. Then the "products of combustion" are drawn by a fan into the "secondary heat exchanger." When the water vapour or steam component of the products of combustion hits the relatively cool walls of this second heat exchanger, they condense down into liquid water. As they do, they release heat into the boiler water through the walls of the secondary exchanger. The liquid water then goes down a drain. Obviously, the boiler water has to be cooler than the steam component of the products of combustion in order for the heat to travel into it. So we make sure that this water is what's coming back to the boiler from the heating system. Again, for this method to work well, it's best applied in a "radiant in-floor" type heating system, where we don't heat the boiler water up to as high a temperature in the first place. --The HVAC Veteran
How much does it cost to replace a heating system?
We just had (Dec,2008) estimates on replacing the boiler in a hydronic (hot water) heating system. The building is, commercial, 6000 square feet , basement and upper level combined. The estimates were not all specific as to boiler size. One of them stated, 260,000 BTU, Peerless MI-09. Another estimate stated, Peerless MI-08, at 227,000 BTU. Lowest estimate was, $4870. Highest estimate was, $7285. Two other estimates were in between.
What is the function of water level indicator?
there are two water level indicators usually mounted in front of boiler to ascertain the level of water inside the boiler am explain construction and working on next page
What is the function of Level indicator?
there are two water level indicators usually mounted in front of boiler to ascertain the level of water inside the boiler am explain construction and working on next page
Why do two water level indicators are provided on boiler?
The lower line indicates minimum water needed, the upper line indicates max.
How to Bleed a two zone water boiler?
open then close it
How does a combination boiler work?
A combination boiler does two tasks, the first is to provide radiant heating to a building and the second is to provide hot water. The boiler can provide hot water to only one system at a time, but eliminates the need to have two boilers.
What is difference between vertical and horizantal boiler?
there are two types of boilers water tube and fire tube. fire tube boilers are divided in to two categories vertical and horizontal. this according to the construction of fire tubes. it is said that vertical boilers are inefficient than horizontal boilers. The vertical boiler is small capacity, and horizontal boiler is higher capacity, well, the horizontal boiler have many types according the drums, there are single drums boiler, and double drums boiler, while, the single drums boiler have fire tube boiler and water and fire tube boiler, double drums boiler is usually water tube boiler.
What happens to boiler water level when boiler is fired will it fall or rise?
Water does not expand with heat the way hydrocarbons do. Thus, from an expansion perspective, the water level will not change as the temperature increases. *To correct the answer listed above without deleting it, as I'm new here :) : Water is one of the few elements that expands in its liquid and solid states. The overall expansion is approximately 4%. There are two basic types of boilers used for hydronic heating, water and steam. The level of water in a steam boiler will drop when fired; as the liquid water becomes a gas, less liquid remains in the boiler. Any water boiler used for heating will be constantly "full" as it is essentially a sealed system. Due to the expansion of the water when heated, all liquid water heating systems use expansion tanks to account for this change in volume. correcting the answers listed above without deleting them Initially when a boiler is fired the water is heated and the steam starts to generate. During this time large amount of ebolution is taking place as the steam is trying to rise up through the water. This causes a swell in the water level and we actually sea a rise in the water level. when fired always waterlevel surges,it is seen practically
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.
Double Boiler Purpose?
A double boiler is usually used to melt choclate. You can make one yourself by using two pots and boiling water.
What does a boiler look like?
The boiler itself consists of two principal parts: the furnace, which provides heat, usually by burning fuel, and the boiler proper, in which water is converted to steam by the heat piped in from the furnace.
What a boiler looks like?
The boiler itself consists of two principal parts: the furnace, which provides heat, usually by burning fuel, and the boiler proper, in which water is converted to steam by the heat piped in from the furnace.
In which type of boiler you can find water walls?
A waterwall in a boiler is any furnace wall that is comprised of refractory and tubes in a water-tube boiler. The tubes are evenly spaced and generally connect to headers which in turn are connected back to the main generating bank of the boiler. They serve a two fold purpose here in that they capture heat that would otherwise escape to the atmosphere and help heat the water in the boiler. And they also help keep the refractory cool (relatively speaking) This prevents spalling of the refractory.
