Jo Jan 9, 2023

A research team led by Hong Sung Chol, a researcher at the Faculty of Heat Engineering, has developed and introduced various types of energy conservational boilers.

Energy conservational unpowered boiler with a package of fire-tube heaters combined with fin array in box type

The boiler satisfies heat requirements needed for production and heating with a small amount of fuel. It costs little to manufacture and install. It is simple in its composition and principle and easy to reset the load. It has the highest heat output for furnaces of the same volume. In addition, for the same heat output, it consumes a lot less fuel and material than other fire-tube heaters. Especially, it is very convenient to introduce them as they are standardized in 10 heat outputs with seven optimized indicators to ensure the scientific accuracy, economy and promptness of introduction in consideration of its various types and conditions of installation. The boiler makes the most use of the produced heat by preheating water from the heat included in waste ash, by using the flue gas from heating and by keeping boiler walls warm. Compared with conventional boilers of the same furnace volume, it provides three times as much heat output (η=88~93%), consumes less fuel by 1/4 [fuel consumption of 162kW hot water heater: B=100~110kg/d(Qar=20MJ/㎏)] and material by over 1/2, and reduces the number of boilers for a unit heating area.

Energy conservational steam bath boiler

It is made up of the cylindrical body that produces both heat and hot water at the same time by recycling wasted heat, a water heater, a feed water inlet, a hot water outlet, a fuel inlet, a fire-grate and a chimney. The annular upper and lower heaters inside the body and the outer collecting heater and economizer outside the body maintain the temperature of a sauna at over 75~85℃ and produce hot water of 40~50℃ at 2~2.5t/h. (fuel consumption B=40kg/d)

Boiler for hot water tank

In the boiler is a hot water heater in the shape of a nest which is combined with a plate and a water pipe. The hot water system consumes no electricity and is operated by natural ventilation and cycle. It can produce hot water of 65~75℃ at 40~45t/d. (fuel consumption B=60kg/d)