Technical Information
The Adoratec System for Increased Performance
(Partial Stream Principle)
In standard ORC systems, the flue gases coming from the furnace are cooled in the evaporator. Due to the heat transferred in this process, the ORC medium vaporises, and
thus becomes utilisable for the steam turbine. However, the flue gas can only be cooled
down to a temperature level which lies above the steam temperature, i.e. it exits the steam generator with a relatively high temperature, and must be cooled down further. This occurs
in what is known as hot-water economiser, in which further heat energy is removed from
the flue gas. This energy is thus not used for power generation, but is practically channelled past the power generation process, and directly into the hot water network.
Adoratec has improved the development of the ORC system so it can be configured to make almost all the heat energy contained in the flue gases utilisable for the generation
of electricity. Thus, a larger portion of the generated flue gas heat is brought into the ORC cycle for power generation, i.e. more power is generated from the same amount of fuel. The system's electrical efficiency increases considerably.
The exact level of efficiency increase depends on various general conditions. According to
the quality of the fuel, and the system energy performance, it can be as much as 10% or higher. If all conditions are known, the improvement which is expected in a particular application can be calculated.
