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Condensing gas boiler - Trend in China?
Clicks:8272017-02-08 11:02:47 Source: http://english.raindow.de/hydt/n50.html
Condensing gas boilers are water heaters fueled by gas with condensing technique. They achieve high efficiency (typically greater than 90% on the higher heating value) by condensing water vapour in the exhaust gases and so recovering its latent heat of vaporisation, which would otherwise have been wasted. This condensed vapour leaves the system in liquid form, via a drain. In many countries, the use of condensing boilers is compulsory or encouraged with financial incentives.(Source:https://en.wikipedia.org/wiki/Condensing_boiler)
The development of condensing gas boiler in the chinese market is very rapid in recent years, while it runs in another direction in Europe. According to industry analyst, the Chinese condensing gas boiler market will hit a record high in 2017.
Condensing boiler flue gas temperature can be reduced to 40°C, the flue gas water vapor latent heat can be fully recycled and utilized, because of this, the theoretical thermal efficiency can be up to 109%. However its efficiency depends strongly on water and gas quality and requires more efforts on maintenance, which causes various difficulties in the marketing. Another point of consideration is the price, which is double even triple of the price for traditional gas boilers.
In conclusion, the condensing gas boiler in China is still in the initial phase and will be mostly used by high-end users.