Welcome to Shenzhen Zhongli Weiye Electromechanical Equipment Co., Ltd!
Hotline:：
中文简体
News
Check category
Contact Us
Shenzhen Zhongli Weiye Electromechanical Equipment Co., Ltd
Mobile Phone：15816882025
Fax：0755-28968949
Address: No. 2268, Longgang section, Longgang Avenue, Longgang District, Shenzhen
Is it true that the thermal efficiency of condensing boilers exceeds 100%?
- Categories:News
- Author:Shenzhen Zhongli Weiye Electromechanical Equipment Co., Ltd.
- Origin:
- Time of issue:2020-04-29 16:11
- Views:
Is it true that the thermal efficiency of condensing boilers exceeds 100%?
Information
Whether it is central heating or separate heating, boilers are basically indispensable. In their own homes, wall-hung boilers are used, and large boilers are used for central heating. With the promotion of energy saving and emission reduction, many places have replaced coal-fired boilers with gas-fired boilers. When people buy boilers, in addition to price, service life, etc., they are most concerned about the thermal efficiency of the boiler. For the problem that the thermal efficiency of condensing boilers exceeds 100%, some people already understand, some people always doubt it, and some people directly put it. It is used as a gimmick for business promotion, so is it true that the thermal efficiency of the condensing boiler exceeds 100%?
According to the law of conservation of energy, the thermal efficiency cannot exceed 100%, but the businessman swears to promote it like this. What is the reason?
We know that the main factor affecting the thermal efficiency of the boiler is the loss of exhaust gas. After the fuel is burned, a large amount of flue gas will be generated, which contains water vapor, nitrogen oxides and other components. Generally, the exhaust gas temperature of gas-fired boilers is above 100 ℃ , the flue gas contains a lot of heat, which causes heat loss and affects the thermal efficiency of the boiler.
Reducing the exhaust gas temperature can reduce the heat loss of the boiler and improve the thermal efficiency of the boiler, so why the traditional boiler exhaust gas temperature should be above 100 ℃, and the exhaust gas temperature should not be reduced as much as possible?
Because the flue gas has a dew point, when the temperature is lower than this value, the flue gas will condense, and the condensed water is acidic, which will cause corrosion to the flue and even the boiler, so the exhaust temperature of ordinary gas boilers should not be too low.
Due to the emergence of condensation recovery technology and the application of some corrosion-resistant materials, the exhaust gas temperature can be reduced, and the heat in the flue gas, that is, the sensible heat of the flue gas, is fully utilized, that is, the low calorific value is fully utilized. At this time, the thermal efficiency has reached 100%, The water generated by the combustion of natural gas will liquefy and release heat below the dew point. Counting this part of the latent heat is the high calorific value. If the low calorific value is still calculated, the thermal efficiency will naturally exceed 100%.
Through the above introduction, I believe that everyone should understand that the thermal efficiency of the boiler will not exceed 100% in essence, but based on the low calorific value, the thermal efficiency of the boiler is above 100%, which is also the common calculation method for the thermal efficiency of the boiler at present.
So how does the condensing boiler do this? Taking the Kagis Condansen series condensing boilers as an example,
please try again.
Contact Us
mobile phone：15816882025
Fax：0755-28968949
E-mail：2843385065@qq.com
Web：www.szburners.com
Address: No. 2268, Longgang section, Longgang Avenue, Longgang District, Shenzhen
Website QR code
copyright © 2022 Shenzhen Zhongli Weiye Electromechanical Equipment Co., Ltd SEO Tag 粤ICP备20006542号 Powered by www.300.cn
