Other applications

Through research, we have learned that waste heat utilization affects a wide range of industries, and is progressing in various fields of heat energy utilization. Due to different fields, the methods are different. From the research, not only has a new understanding of the use of waste heat, but also discovered many new methods of waste heat utilization.

For example, there are three main methods for using engine waste heat, namely thermoelectric power generation, exhaust gas turbine power generation, and Flon turbine power generation. Thermoelectric power generation mainly uses thermoelectric power materials for power generation, but due to the low energy conversion rate of thermoelectric materials, it is necessary to develop thermoelectric exchange materials with higher conversion rates. Exhaust gas turbine power generation is the use of exhaust gas to drive the turbine to drive the generator to generate electricity. This power generation method has a certain impact on the performance of the engine and requires further research.

my country’s first 12 MW manganese ferrosilicon alloy submerged arc furnace flue gas generator was put into operation at Sinosteel Guangxi Ferroalloy Co., Ltd. on September 21, 2009. The equipment mainly uses the energy of the waste heat in the flue gas to generate electricity. The waste heat of the power plant is mainly used by heat pump technology. The heat pump is a machine that transfers heat energy from low temperature to high temperature. From a principle point of view, the heat pump and the refrigerator are the same, the difference lies in the purpose of use. Although the use of heat pump technology will lower the temperature of the circulating cooling water, it is not easy to meet the national emission standards. Therefore, the main problem of heat pump technology using power plant waste heat is also the water temperature problem.

For example, the waste heat utilization of air conditioners. Since the air conditioners are installed indoors, the waste heat utilization of air conditioners is closely related to family life. Traditional air conditioners generally discharge the heat absorbed in the room through the outdoor unit, which will not only generate a lot of greenhouse gases, but also waste a lot of heat energy. The following describes in detail a method of using the waste heat of central air conditioning to process hot water, the steps are as follows:

I Install a water separator in the high temperature area of the central air-conditioning condenser, which contains 50%-100% of the condenser tubes in the high temperature area and forms an independent closed heat exchange area;

II Connect the output end of the water separator to the input end of the hot water tank, and the output end of the hot water tank to the input end of the water separator, so that the water in the hot water tank enters the high temperature area of the condenser from the input end of the water separator and the residual heat radiated by the condenser tube After heating, the output end of the water trap returns to the hot water tank to form circulating water heat.