Regarding extraction steam turbines
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I have a question: There is an existing power plant; the original plan was to use 3 * 75-ton coal-fired boilers, along with 2 15MW extraction steam turbines. The boiler is now to be upgraded to 3 units of 55-ton biomass boilers, with the steam turbine remaining unchanged. I would like to ask whether 3 boilers of 55 tons each can meet the full-load operation requirements of 2 15MW extraction steam turbines The 2 steam turbines are required to ensure an external gas supply rate of 55 t/h; how much electricity can be generated in one year after the renovation? How to calculate it? Turbine inlet parameters: pressure of 4.9 MPa, temperature of 470°C. Rated extraction pressure: 0.98 MPa. Rated extraction temperature: 302.7°C℃
Contact the turbine manufacturer; they can provide a detailed consultation plan.
This algorithm is quite complex, and turbine manufacturers have a dedicated set of calculation programs for it.
After the modification, the maximum evaporation capacity of the three boilers is 165 tons per hour. If the steam inlet flow rate of the two 15MW extraction steam turbines exceeds 165 tons per hour, they cannot operate at full load in principle. Of course, there is also the case of pure condensing operation, but this too cannot be achieved if the thermal load remains unchanged, not to mention the maximum extraction condition.