Condensing boilers are water heaters fueled by gas or oil. They achieve high efficiency (typically greater than 90% on the higher heating value) by using waste heat in flue gases to pre-heat cold water entering the boiler. Water vapour produced during combustion is condensed into liquid form, which leaves the system via a drain. In many countries, the use of condensing boilers is compulsory or encouraged with financial incentives.
In a gas fired condensing boiler, the water is heated through the heat of combustion, just as with non-condensing boilers. The resulting flue gases are normally passed into the chimney. As a result, the energy contained in the flue gas is lost. However, condensing technology exploits these gases, which consist to a large extent of hot water vapour. It extracts the flue gas heat and feeds the energy obtained into the heating circuit.
In order to gain energy, water vapour must condense. It does this at a temperature of below 56 ℃. The condensing boiler cools the steam through a specially designed heat exchanger. The energy gained is used to preheat the cold heating water. The hot water then passes into the primary heat exchanger where it is heated further to reach the desired temperature. During this process, small amounts of waste water occur which must be disposed of. The acidity of the waste water is so low that it can be conducted into a normal drainage system without further neutralisation.
Condensing Gas Boiler for Sale Manufacturer in China
ZG Boiler is a leading industrial boilers and industrial autoclaves manufacturer in China. It has 70 years’ experience, which can guarantee the high quality, professional technologies and good service. Thanks to its effort, it has been identified by many famous international certifications, such as ISO, IBR and ASME, and ZG Boiler has become the IBR steam boiler supplier in India, and has earned good reputation in India. As an outstanding condensing gas boiler manufacturer in China, ZG...