How Condensing Boilers Work?
Condensing boilers are designed to have increased efficiency than traditional boilers. The efficiency of condensing boiler can be over 87% which is far different from the traditional boiler which is only around 75%. The increased efficiency of boiler condensing is due to the extraction of heat from the wasted flue gases. Most boilers have a single combustion chamber enclosed by the waterways of the heat exchanger through which the hot gases can pass. These gases are then expelled through the flue which is located at the top of the condensing boiler, at a temperature of around 180°C.
Condensing boilers are also designed to allow the heat to rise upwards through the primary heat exchanger. This happens when gases are rerouted and diverted over a secondary heat exchanger. This process can decrease the flue gas temperature to about 55°C. The reduction of the temperature that is present in the boiler condensing causes the water vapor that is formed during the combustion process to condense and, as the droplets of water form, fall by gravity to collect at the base of the flue manifold. The remaining gases are then expelled to the outside environment by a fan-assisted balanced flue.
The condensation produced within the condensing boiler should be drained as necessary into the waste discharge pipe work or externally into a purpose-made soak away. It is only possible for the boiler to work on the very high efficiencies if the flow and return pipe work is also kept below 55°C. The flow and return temperatures of the boiler need to be maintained so that, the heat transference that will occur will be within the proper process. Low flow and return are very essential to the process of the heating system. Always keep in mind that the proper installation of the boilers will assure you that it will work perfectly especially during the time that you need it.