Home Boiler Examination
Oct 1st, 2010 Posted in family | no comment »Most homes contain a boiler for heating. In general, the types of boiler that can be found in homes fall into 2 different categories. In category one you have standard central heating boilers. In category two you have combination boilers. These 2 categories can be divided even further into sealed boilers and vented boilers. It is also possible to differentiate between boilers on the basis of how they operate. Your home boiler could either be condensing or non-condensing. In general, you will find that standard heating boilers are forced draught combustion units (fan assisted).
A system boiler can contain a wide variety of items within its structure. Items that can be found within the casing include a pressure release valve, pump and expansion vessel. This is obviously in addition to the standard heating boiler itself. This system boiler structure is normally fine for home locations. Very little customisation is needed with this system.
Standard central heating boilers have a pilot ignition system that is either permanent or present only during operation. Pilot ignition systems mostly use a thermocouple device to ensure a flame is present and signal the gas solenoid valve to stay open only when this is the case. Heat produced from the combustion of Natural Gas or LPG is transferred to the heat exchanger, which receives return fluid from the colder side of the central heating pipe-work.
The thermal energy captured by the thermal fluid flowing through the heat exchanger causes a temperature increase of normally around twelve degrees. Heat exchangers can be made from a number of different materials, namely, cast Iron, copper, stainless steel or aluminium. Standard central heating boilers deliver the products of combustion from a combustion chamber through a flue system to the flue terminal.
Flue gas contains additional substances apart from what is normally present in air; carbon monoxide, additional water vapour from the combustion process, nitrogen oxide, sulphur oxide and particulate matter. Concentrations of oxygen and carbon dioxide are generally different too as a result of combustion taking place. The increased water vapour present in the flue gas possesses a significant amount of latent heat, which is lost to the atmosphere.
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