Recently, Guangdong Wanhe Group, a leading enterprise in China's gas appliance industry, held a press conference to announce the successful development of the world's first gas water heater with a thermal efficiency exceeding 100%. According to the test report issued by the National Gas Appliance Inspection and Testing Center, the water heater Thermal efficiency has exceeded 100% and the highest has reached 103.4%. Professor Xia Zhaozhi, the leader of China's gas heat energy field and the thermal energy department of Chongqing University, said that in the field of household heat equipment, this is the highest level currently achieved.
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According to the senior engineer of the National Gas Appliance Inspection and Testing Center, the heat generated by gas combustion can be divided into sensible heat and latent heat. The latent heat is mainly hidden in the water vapor and discharged together with the flue gas generated by the combustion. According to European standards, the calculation of thermal efficiency is based on the degree of sensible heat utilization, and latent heat is not within the calculation range. Condensing water heaters now use latent heat. According to national standards, the denominator in the formula for calculating thermal efficiency is still “sensible heatâ€, and the molecules become “sensible heat†+ “latent heatâ€. Under the current technical level, The degree of heat utilization is already very high, so thermal efficiency may exceed 100%.
“At present, the use of latent heat in the world mainly depends on condensation technology,†Professor Xia introduced. “The energy-saving effect of condensing water heaters is mainly related to thermal efficiency. The higher the thermal efficiency, the better the energy saving effectâ€.
According to the technical staff of Wanhe Group, under the technical guidance of Professor Xia, Wanhe has experienced the development of three generations of products in the field of condensing water heaters. The first generation of products is the first condensing gas in China that was successfully developed in 2001. The water heater has a thermal efficiency of 92%; the second generation is the v99 series launched by Wanhe in September 2005, the thermal efficiency can reach 99.6%; the third generation is the Wanhe Group launched v100, the thermal efficiency is over 102%, the world leader, this It is the first time that China's gas water heaters have been at the forefront of the world in terms of technology.
Lu Chulong, president of Wanhe Group, said that Wanhe Group pays great attention to “independent innovation†and invests a large amount of money in technology research and development every year. In the field of gas water heaters, it has filled the domestic technology gap nine times, especially about energy-saving gas appliances. In addition to the condensing technology, the second and third generation condensing water heaters have adopted six other energy-saving technologies to make the thermal efficiency far exceed that of ordinary condensing water heaters .
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