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The use of pressure hot water storage tanks to improve the energy flexibility of the steam power unit

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  • Trojan, Marcin
  • Taler, Dawid
  • Dzierwa, Piotr
  • Taler, Jan
  • Kaczmarski, Karol
  • Wrona, Jan

Abstract

Existing thermal power plants must be adapted to cooperate with wind farms and other renewable energy sources by improving their flexibility. The paper analyzes the improvement of the 200MWe block's flexibility by installing hot water storage tanks. The maximum increase in the block output resulting from the shut-off of low-pressure steam bleeds is calculated. During this period, the hot water from water storage tanks is supplied to the boiler. Hot water is accumulated in pressure water tanks during the low-load period of the unit. Water with design temperature in the feed water tank flows into the water pressure tanks to reduce the electric power of the unit in the off-peak night hours. The hot water accumulated during the night in storage tanks is used to feed the boiler during the period of peak demand for electricity. The reduction in the block electric power was calculated for various volumes and charging periods of the water storage tanks. A cost analysis was carried out to demonstrate the economic profitability of installation of pressure water accumulators. It is worth mentioning that hot water tanks may also be applied to fill the boiler evaporator with hot water before the start-up of the power unit from the cold state.

Suggested Citation

  • Trojan, Marcin & Taler, Dawid & Dzierwa, Piotr & Taler, Jan & Kaczmarski, Karol & Wrona, Jan, 2019. "The use of pressure hot water storage tanks to improve the energy flexibility of the steam power unit," Energy, Elsevier, vol. 173(C), pages 926-936.
    • Handle: RePEc:eee:energy:v:173:y:2019:i:c:p:926-936
    DOI: 10.1016/j.energy.2019.02.059
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    References listed on IDEAS

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    1. Taler, Jan & Dzierwa, Piotr & Taler, Dawid & Harchut, Piotr, 2015. "Optimization of the boiler start-up taking into account thermal stresses," Energy, Elsevier, vol. 92(P1), pages 160-170.
    2. Yang, Zheng & Chen, Haisheng & Wang, Liang & Sheng, Yong & Wang, Yifei, 2016. "Comparative study of the influences of different water tank shapes on thermal energy storage capacity and thermal stratification," Renewable Energy, Elsevier, vol. 85(C), pages 31-44.
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    1. Dzierwa, Piotr & Taler, Jan & Peret, Patryk & Taler, Dawid & Trojan, Marcin, 2022. "Transient CFD simulation of charging hot water tank," Energy, Elsevier, vol. 239(PC).
    2. Fabian Borst & Nina Strobel & Thomas Kohne & Matthias Weigold, 2021. "Investigating the Electrical Demand-Side Management Potential of Industrial Steam Supply Systems Using Dynamic Simulation," Energies, MDPI, vol. 14(6), pages 1-20, March.
    3. Liu, Kairui & Wang, Chao & Wang, Limin & Liu, Bin & Ye, Maojing & Guo, Yalong & Che, Defu, 2023. "Dynamic performance analysis and control strategy optimization for supercritical coal-fired boiler: A dynamic simulation," Energy, Elsevier, vol. 282(C).
    4. Liang Tian & Xinping Liu & Huanhuan Luo & Tuoyu Deng & Jizhen Liu & Guiping Zhou & Tianting Zhang, 2021. "Soft Sensor of Heating Extraction Steam Flow Rate Based on Frequency Complementary Information Fusion for CHP Plant," Energies, MDPI, vol. 14(12), pages 1-17, June.
    5. Wang, Zhu & Liu, Ming & Yan, Hui & Yan, Junjie, 2022. "Optimization on coordinate control strategy assisted by high-pressure extraction steam throttling to achieve flexible and efficient operation of thermal power plants," Energy, Elsevier, vol. 244(PA).
    6. Yuliang Dong & Songyuan Yu & Chengbing He & Qingbin Yu & Fang Fang, 2022. "Optimal Multi-Mode Flexibility Operation of CHP Units with Electrode Type Electric Boilers: A Case Study," Energies, MDPI, vol. 15(24), pages 1-21, December.
    7. Wang, Di & Liu, Deying & Wang, Chaonan & Zhou, Yunlong & Li, Xiaoli & Yang, Mei, 2022. "Flexibility improvement method of coal-fired thermal power plant based on the multi-scale utilization of steam turbine energy storage," Energy, Elsevier, vol. 239(PD).
    8. Bravo, Julio & Abdulridha, Ahmed & Wang, Shuoyu & Matrone, Dominic & Yao, Zheng & Neti, Sudhakar & Naito, Clay & Quiel, Spencer & Suleiman, Muhannad & Romero, Carlos, 2023. "Design and experimental testing of a 150 kWh thermal battery using thermosiphons embedded in a concrete matrix for power plant flexible operation," Energy, Elsevier, vol. 277(C).
    9. Bartnik, Ryszard & Buryn, Zbigniew & Hnydiuk-Stefan, Anna, 2021. "Thermodynamic and economic analysis of effect of heat accumulator volume on the specific cost of heat production in the gas-steam CHP plant," Energy, Elsevier, vol. 230(C).
    10. Taler, Jan & Trojan, Marcin & Dzierwa, Piotr & Kaczmarski, Karol & Węglowski, Bohdan & Taler, Dawid & Zima, Wiesław & Grądziel, Sławomir & Ocłoń, Paweł & Sobota, Tomasz & Rerak, Monika & Jaremkiewicz,, 2023. "The flexible boiler operation in a wide range of load changes with considering the strength and environmental restrictions," Energy, Elsevier, vol. 263(PB).
    11. Taler, Dawid & Dzierwa, Piotr & Kaczmarski, Karol & Taler, Jan, 2021. "Optimisation of heating and cooling of pressure thick-walled components operating in the saturated steam area," Energy, Elsevier, vol. 231(C).
    12. Dawid Taler & Jan Taler & Tomasz Sobota & Jarosław Tokarczyk, 2022. "Cooling Modelling of an Electrically Heated Ceramic Heat Accumulator," Energies, MDPI, vol. 15(16), pages 1-26, August.
    13. Yan, Hui & Liu, Ming & Wang, Zhu & Zhang, Kezhen & Chong, Daotong & Yan, Junjie, 2023. "Flexibility enhancement of solar-aided coal-fired power plant under different direct normal irradiance conditions," Energy, Elsevier, vol. 262(PA).

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