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Increasing the Flexibility of Power Plants

In the environment of volatile energy markets, the flexibility requirements of conventional power plants are changing. By using the HTTES system, thermal energy can be extracted and temporarily stored whenever fluctuations in the steam network after the gas turbine occur. During times of increased heat demand, the energy is fed back into the steam process via the waste heat boiler.
Thus, the CCP plant gains flexibility and can be operated more economically and with less material wear.

Heat extraction in CCP plants

With this system, part of the thermal energy can be temporarily stored in the high-temperature heat storage before entering the waste heat boiler and being fed back into the process later on. As a result, the electrical power generation can be adjusted while the thermal power output remains the same.

Utilization of GT waste heat

Depending on the situation of the electricity market, parts or all of the waste heat from the gas turbine are stored in the HTTES system at temperatures of up to 630°C. The electrical power output of the GT thus remains stable.

High-Temperature Thermal Energy Storage

The modular system allows for storage capacities in the range of MWh to GWh with very high thermal power, so that the storage can be fully charged and discharged within a few hours.

 

Discharging the HTTES

In case of a positive market signal the energy in the HTTES is fed back to the steam generator of the CCP plant, thereby increasing the electrical output of the system.