DOAJ Open Access 2018

Analysis on the Change of Steam Turbine Back Pressure Under Operation of Low Pressure Economizer

Chuanling LIU Minghui LIU Zhenjiang CHEN Ang SONG

Abstrak

After low pressure economizer was put into the unit, waste heat of boiler flue gas enters the regenerative system. The extraction steam returns to low pressure cylinder, and the steam volume increases, which causes the change of the back pressure of the steam turbine. According to the equivalent enthalpy drop theory, the calculation model of back pressure change was established. The model is verified through the test and analysis of one 220MW unit. Under 220MW working condition, the steam turbine back pressure is increased by 0.29 kPa. After the correction of the back pressure, the energy saving of "equivalent enthalpy drop method" decreases by 0.19%, which is closer to the energy saving of the "thermal test method". It shows that in the energy saving effect analysis of operating low-cost economizer with the "equivalent enthalpy drop method", the impact of back pressure changes on energy savings need to be considered.

Topik & Kata Kunci

Applications of electric power Production of electric energy or power. Powerplants. Central stations Science

Penulis (4)

Chuanling LIU

Minghui LIU

Zhenjiang CHEN

Ang SONG

Format Sitasi

APA MLA BibTeX

LIU, C., LIU, M., CHEN, Z., SONG, A. (2018). Analysis on the Change of Steam Turbine Back Pressure Under Operation of Low Pressure Economizer. https://doi.org/10.12096/j.2096-4528.pgt.2018.057

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Informasi Jurnal

Tahun Terbit: 2018
Sumber Database: DOAJ
DOI: 10.12096/j.2096-4528.pgt.2018.057
Akses: Open Access ✓