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Thermal calculations of a natural circulation power boiler operating under a wide range of loads

Author

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  • Zima, Wiesław
  • Taler, Jan
  • Grądziel, Sławomir
  • Trojan, Marcin
  • Cebula, Artur
  • Ocłoń, Paweł
  • Dzierwa, Piotr
  • Taler, Dawid
  • Rerak, Monika
  • Majdak, Marek
  • Korzeń, Anna
  • Skrzyniowska, Dorota

Abstract

The article presents the development of a comprehensive methodology for thermal-flow computations of a natural circulation power boiler. For this purpose, calculation methods available in the literature were used, and in several cases in-house methods were developed. These in-house methods are one of the main outputs of the work. They include a new approach to computing the heat transfer occurring in the wall superheaters and hanger tubes situated in parallel in a single combustion gas duct. A new method of calculating the heat transfer in the rotary air heater was also proposed. Based on this, an in-house computer program was created. The computations performed cover all heated surfaces of the boiler with the nominal output of 350 × 103 kg/h of superheated steam and concern several characteristic points of its steady-state operation. Additional CFD computations were performed for the boiler furnace chamber. All the obtained results were compared with the data made available by the boiler manufacturer. Small differences observed only slightly affect the heat distribution in the heated surfaces of the boiler. This confirms the correctness of the proposed calculation methodology and the in-house developed mathematical models. The models can support the power boiler design process.

Suggested Citation

  • Zima, Wiesław & Taler, Jan & Grądziel, Sławomir & Trojan, Marcin & Cebula, Artur & Ocłoń, Paweł & Dzierwa, Piotr & Taler, Dawid & Rerak, Monika & Majdak, Marek & Korzeń, Anna & Skrzyniowska, Dorota, 2022. "Thermal calculations of a natural circulation power boiler operating under a wide range of loads," Energy, Elsevier, vol. 261(PB).
    • Handle: RePEc:eee:energy:v:261:y:2022:i:pb:s0360544222022393
    DOI: 10.1016/j.energy.2022.125357
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    References listed on IDEAS

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    1. Li, Zixiang & Miao, Zhengqing & Shen, Xusheng & Li, Jiangtao, 2018. "Prevention of boiler performance degradation under large primary air ratio scenario in a 660 MW brown coal boiler," Energy, Elsevier, vol. 155(C), pages 474-483.
    2. Taler, Jan & Zima, Wiesław & Ocłoń, Paweł & Grądziel, Sławomir & Taler, Dawid & Cebula, Artur & Jaremkiewicz, Magdalena & Korzeń, Anna & Cisek, Piotr & Kaczmarski, Karol & Majewski, Karol, 2019. "Mathematical model of a supercritical power boiler for simulating rapid changes in boiler thermal loading," Energy, Elsevier, vol. 175(C), pages 580-592.
    3. Madejski, Paweł & Żymełka, Piotr, 2020. "Calculation methods of steam boiler operation factors under varying operating conditions with the use of computational thermodynamic modeling," Energy, Elsevier, vol. 197(C).
    4. Grochowalski, Jaroslaw & Jachymek, Piotr & Andrzejczyk, Marek & Klajny, Marcin & Widuch, Agata & Morkisz, Pawel & Hernik, Bartłomiej & Zdeb, Janusz & Adamczyk, Wojciech, 2021. "Towards application of machine learning algorithms for prediction temperature distribution within CFB boiler based on specified operating conditions," Energy, Elsevier, vol. 237(C).
    5. Zima, Wiesław, 2019. "Simulation of rapid increase in the steam mass flow rate at a supercritical power boiler outlet," Energy, Elsevier, vol. 173(C), pages 995-1005.
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    Cited by:

    1. Pieter Rousseau & Ryno Laubscher & Brad Travis Rawlins, 2023. "Heat Transfer Analysis Using Thermofluid Network Models for Industrial Biomass and Utility Scale Coal-Fired Boilers," Energies, MDPI, vol. 16(4), pages 1-49, February.
    2. 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).
    3. Woon, Kok Sin & Phuang, Zhen Xin & Taler, Jan & Varbanov, Petar Sabev & Chong, Cheng Tung & Klemeš, Jiří Jaromír & Lee, Chew Tin, 2023. "Recent advances in urban green energy development towards carbon emissions neutrality," Energy, Elsevier, vol. 267(C).

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