Operational flexibility of combined heat and power plant with steam extraction regulation
Paper in proceedings, 2019

This paper evaluates the potential for flexible operation of combined heat and power plants, using previously validated steady-state and dynamic process models. The models compute the change in power and heat generation, as well as the response times of steam turbine extraction regulation. It is found that for small-to-medium sized plants, steam bypass could be a promising solution for regulation of power output, also in combination with boiler load changes. Rise times for load reductions by valve opening are within 30 s, independent of the extracted flow, and steam extractions/bypass can lead to power output reductions of up to 30% of rated power. However, plant specific design aspect may limit the achievable magnitude of load changes and must be considered.

district heating

dynamic modeling

operational flexibility

steam extraction

combined heat and power

Author

Johanna Beiron

Energy Technology 3

Rubén Mocholí Montañés

Chalmers, Space, Earth and Environment, Energy Technology

Fredrik Normann

Chalmers, Space, Earth and Environment, Energy Technology

Proceedings of 11th International Conference on Applied Energy

769

11th International Conference on Applied Energy
Västerås, Sweden,

Flexible Combined heat and power plants for power systems with volatile electricity prices

Swedish Energy Agency, 2017-10-01 -- 2020-11-01.

Subject Categories

Energy Engineering

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Latest update

9/29/2020