Not every relation is a function. But every function is a relation. Function is just a part of relation.
The cubic function.
Range
A formula or graph are two ways to describe a math function. How a math function is described depends on the domain of the function or the complexity of the function.
The Mandelbrot graph is generated iteratively and so is a function of a function of a function ... and in that sense it is a composite function.
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.
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.
enviromental pollution control
check a company called Vahterus Oy from German. we planned to install and replace all heat exhanger in our plant and boiler. One boiler economiser can reduce USD100K per year and PBT Margin is 4% yearly for 10 years. The saving comes from reduce usage of NG of 46sm3/hr
William Fletcher has written: 'The steam jacket practically considered as an efficient fuel economiser' -- subject(s): Steam-engines, Steam-jackets
If the boiler fuel contains Sulphur (and most do) combustion products in the flue gas will include Oxides of Sulphur (SO2 and SO3). SO3 combines with water (H2O) to make Sulphuric Acid (H2SO4). If the temperature of the flue gas falls below the dew point, the combination of the acid with the moisture in the flue gas causes corrosion of the flue gas duct work. Bypassing the economiser in the early stages of a boiler start keeps the flue gas temperature above the dew point.
The economizer is used to raise feedwater temperature up to nearly the temperature of the boiler to avoid thermal shock and improve the boiler's efficiency. Every 11 degrees Fahrenheit increase in feedwater temperature yields a 1% increase in boiler efficiency.
Boiler mountings are different fittings and devices which are necessary for the operation and safety of a boiler .e.g. pressure gauge, safety valves , steam stop valve etc Normally these device are mounted over boiler shell .Boiler Accessories are auxilary plants or parts required for steam boilers for their proper operation and to increase efficiency of the boiler .e.g.feed pumps, super heater , economiser etc
Function
The parent function of the exponential function is ax
Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.Such a function does not exist for English. A function call BAHTTEXT will do it for the Thai language.
The IF function is the main function to do it and you can also use other logical functions, like the AND function, the OR function or the NOT function.