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Condensing wall-hung boilers are wall-hung boilers that use high heat value condensation technology. The key is the condensation technology, which recycles the waste heat from the flue gas.
It has two characteristics, one is energy saving, because it recycles the hot air generated during its own use. The second is environmental protection, recycling the exhaust gas.
In traditional wall-hung boilers, the exhaust gas temperature is generally 160~250 °C, or even higher, so that the water generated by the fuel combustion is superheated in the flue gas, and the flue gas is lost from the chimney, and the thermal efficiency can only reach 85. %~91%. The condensation technology of the condensing wall-hung boiler reduces the exhaust gas temperature to 50%~70%, fully recovers the sensible heat of the flue gas and the condensation latent heat of the water vapor, and the thermal efficiency is up to 109%.
The condensing wall-hung boiler adopts the method of full pre-mixing ratio adjustment. The combustion of the condensing wall-hung boiler is lower due to the more complete combustion during the combustion process. In addition, the condensing wall-hung boiler can reduce the emission of harmful gases and reduce the environment during the energy recovery process. Pollution and environmental indicators are better.
At the "Central European Heating Conference - Household Heating Special" forum held in conjunction with the ISH International Heating and Heating Exhibition, the relevant survey data explained from many aspects that the condensing boiler will become the future heating. development trend.
According to a survey of heating consumers, 70% of consumers are currently dissatisfied with the current air conditioning heating. Through the analysis of the heating time and temperature setting of the existing air-conditioning heating method, the monthly electricity cost in winter is about 290 yuan. In addition to the user's dissatisfaction with the cost, the user's dissatisfaction with indoor air drying and air non-circulation in terms of comfort is 22%.
In terms of heat, the same 111% natural gas, the water vapor of the conventional fireplace will take away 11% of the heat, the flue shell will also lose 9% of the heat, and finally the actual heat left 91%. Due to the application of the condensation technology, the heat absorbed by the water vapor and the heat lost by the flue shell can be reduced to 2%, and the actual heat is increased to 107%. The application of the condensing wall-hung boiler to AUTO technology avoids the repeated start and stop of the wall-hung boiler during operation and reduces the amplitude of the indoor temperature.
The condensing wall-hung boiler has no difference in appearance from the conventional wall-hung boiler. However, the internal combustion chamber of the condensing wall-hung boiler is made of stainless steel or silicon-aluminum alloy material, and the main material of the ordinary wall-hung boiler is copper and aluminum fins. It has strong acid corrosion resistance, so there is no limit to the return water temperature, and the service life is up to 20 years. Because of its corrosion resistance, it can be applied to any heating system such as radiator, floor heating, fan coil and so on.
According to the survey, the use rate of condensing boilers in the Western European market has reached 60%. Conventional domestic gas boilers have been banned from production and use in many countries, and European countries such as the United Kingdom and Switzerland have also introduced the use of condensation wall hanging. The subsidy policy for furnace users.
Although from the current situation, there are still some obstacles in the use of condensing wall-hung boilers in China, such as high technical content, strict requirements for product manufacturing, high requirements for use and maintenance, high requirements for use environment and working conditions; comparison with traditional boilers and Ordinary domestic and foreign wall-hung boilers, the price is relatively high. However, with the increasing share of finely decorated homes in the real estate market and the huge demand for comfortable home systems for sophisticated homes, system integrators are likely to become the future direction of the enterprise, the application of the integrated solution of condensing technology and solar heat pump. It will also gradually increase.
In summary, with the improvement of living standards and the increasing efforts of national energy conservation and emission reduction policies, and the gradual maturity of condensing technology and reasonable price, new condensing boilers will definitely be available in the Chinese market in the near future. Widely promoted.