Conventional common control systems detect the O2 concentration in boiler exhaust gas and control the air-fuel ratio (ratio for theoretical air volume) to ensure the required concentration (represented by the orange area in the diagram on the following). It is possible to reduce heat loss by further lowering the air-fuel ratio, but just as it was confirmed earlier, Fuji Electric has been able to develop a practical
Used Steam Boilers for sale. Cleaver-Brooks equipment
the factory began field testing a steam-generation heat pump developed at Fuji Electrics Mie Factory, aiming to make further energy savings by using the exhaust heat from their diesel engine to generate a supply of steam for the clean rooms. The steam-generation heat pump itself is about the size of a typical vending machine.
Boiler Efficiency and Combustion | Spirax Sarco
Fuji Electric has applied its thermal system technology, which was cultivated through the development of vending machines, and thermal component technology used in heat exchangers to develop a small capacity (30 kW) exhaust heat recovery type steam generating heat pump system that can produce 120℃saturated steam by means of efficiently recovering hot waste water of less than 100℃.