Dual Units as a Direction for Restoration of 200 MWe Units
(Room G109, Auditorium Centre, First Floor)
10 Jun 15
9:00 AM
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10:30 AM
Tracks:
Theme: Coal's Cleaner Future
The technical solution consisting of a system of two boilers feeding one turbine is not a new concept. Such systems have been already used in older power plants. In contrast, the idea of introducing such a system in the place of existing 200 MWe units, using boilers and turbines with supercritical parameters at efficiencies corresponding to the new units of 500-1000 MWe - is an original idea ENERGOPROJEKT-KATOWICE SA, called DUOBLOK. This solution appeared as one of the options for building a new unit in Turów Power Plant.
The concept of DUOBLOK is one of possibilities of a "deep rehabilitation" of units. It assumes placing of one DUOBLOK system in the place of two existing units, with two boilers and one turbine with a capacity of 450-600 MW (500 MWe class).
An important aspect of the DUOBLOK concept is a limited increase of plant capacity (or leave it on the same level), simultaneously achieving a higher efficiency. The authors discuss the advantages of such a solution, especially pointing out a possibility of retaining a significant portion of the existing infrastructure and carrying out a cost analysis for various solutions.
The article analyzes in detail the construction of DUOBLOK compared to the construction of a new unit, making a comparison in terms of capital expenditures, arrangement solutions and the benefits of one of the most important DUOBLOK characteristic, that is, their repeatability. The Authors having a vast experience in this field, discuss in detail the advantages and disadvantages of each solution, indicating possible areas for savings and improvements and thus giving valuable hints for future investors.
In conclusion, the Authors analyze the development trends of coal and gas power industry, the existing and future potential for new capacities and emphasize the attractiveness of such an option as DUOBLOK.