An increase in thermal efficiency does not necessarily mean energy savings for the heating furnace
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This post was last edited by dongliangsir on 2010-8-3 at 15:59. In the eyes of most people, if the thermal efficiency of a heating furnace increases, it seems logical that the entire furnace will use less energy; however, this is not necessarily the case. I believe that an increase in the thermal efficiency of a heating furnace does not necessarily equate to energy savings. What is truly important, in my view, is the specific consumption of the furnace; it is a decrease in this specific consumption (of raw materials) that constitutes actual energy savings. After all, thermal efficiency is influenced to a large extent by human factors, such as temporary adjustments to parameters during inspections and tests, followed by resetting those parameters afterward. Therefore, I think specific consumption is the best indicator of a furnace’s energy-saving performance.
I fully agree with the original poster’s view. Looking at heat efficiency and flue gas temperature isn’t sufficient to determine anything; some heating furnaces can keep the flue gas temperature very low while still having high heat efficiency. In such cases, the convection chamber is not used, and the hot smoke is directed to devices whose surface area is twice that of the convection chamber, where heat is recovered through indirect methods. The heat recovered is simply not enough to compensate for the heat lost by the devices themselves
The efficiency you’re referring to is the counterbalance efficiency; if both the positive and negative balances are high, then high efficiency means energy savings, which is certainly true. However, the simplified calculation formula for the counterbalance of the heating furnace in a certain group’s standards has its limitations. People will engage in fraud by targeting the key elements in the calculation formulas; as a result, even though efficiency increases, energy inefficiency occurs! ! ! !