A boil-off gas utilization for improved performance of heavy duty gas turbines in combined cycle
The storage of the natural gas under liquid phase is widely adopted and one of the intrinsic phenomena occurring in liquefied natural gas is the so-called boil-off gas; this consists of the regasification of the natural gas due to the ambient temperature and loss of adiabacity in the storage tank. A...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2021
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| Online Access: | https://hdl.handle.net/10356/152123 |
| _version_ | 1826120260263084032 |
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| author | Mazzoni, Stefano Rajoo, Srithar Romagnoli, Alessandro |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Mazzoni, Stefano Rajoo, Srithar Romagnoli, Alessandro |
| author_sort | Mazzoni, Stefano |
| collection | NTU |
| description | The storage of the natural gas under liquid phase is widely adopted and one of the intrinsic phenomena occurring in liquefied natural gas is the so-called boil-off gas; this consists of the regasification of the natural gas due to the ambient temperature and loss of adiabacity in the storage tank. As the boil-off occurs, the so-called cold energy is released to the surrounding environment; such a cold energy could potentially be recovered for several end-uses such as cooling power generation, air separation, air conditioning, dry-ice manufacturing and conditioning of inlet air at the compressor of gas turbine engines. This paper deals with the benefit corresponding to the cooling down of the inlet air temperature to the compressor, by means of internal heat transfer recovery from the liquefied natural gas boil-off gas cold energy availability. The lower the compressor inlet temperature, the higher the gas turbine performance (power and efficiency); the exploitation of the liquefied natural gas boil-off gas cold energy also corresponds to a higher amount of air flow rate entering the cycle which plays in favour of the bottoming heat recovery steam generator and the related steam cycle. Benefit of this solution, in terms of yearly work and gain increase have been established by means of ad hoc developed component models representing heat transfer device (air/boil-off gas) and heavy duty 300 MW gas turbine. For a given ambient temperature variability over a year, the results of the analysis have proven that the increase of electricity production and efficiency due to the boil-off gas cold energy recovery has finally yield a revenue increase of 600,000€/year. |
| first_indexed | 2024-10-01T05:13:36Z |
| format | Journal Article |
| id | ntu-10356/152123 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:13:36Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1521232021-07-16T01:34:58Z A boil-off gas utilization for improved performance of heavy duty gas turbines in combined cycle Mazzoni, Stefano Rajoo, Srithar Romagnoli, Alessandro School of Mechanical and Aerospace Engineering Energy Research Institute @ NTU (ERI@N) Engineering::Mechanical engineering Boil-off Gas Combined Cycle The storage of the natural gas under liquid phase is widely adopted and one of the intrinsic phenomena occurring in liquefied natural gas is the so-called boil-off gas; this consists of the regasification of the natural gas due to the ambient temperature and loss of adiabacity in the storage tank. As the boil-off occurs, the so-called cold energy is released to the surrounding environment; such a cold energy could potentially be recovered for several end-uses such as cooling power generation, air separation, air conditioning, dry-ice manufacturing and conditioning of inlet air at the compressor of gas turbine engines. This paper deals with the benefit corresponding to the cooling down of the inlet air temperature to the compressor, by means of internal heat transfer recovery from the liquefied natural gas boil-off gas cold energy availability. The lower the compressor inlet temperature, the higher the gas turbine performance (power and efficiency); the exploitation of the liquefied natural gas boil-off gas cold energy also corresponds to a higher amount of air flow rate entering the cycle which plays in favour of the bottoming heat recovery steam generator and the related steam cycle. Benefit of this solution, in terms of yearly work and gain increase have been established by means of ad hoc developed component models representing heat transfer device (air/boil-off gas) and heavy duty 300 MW gas turbine. For a given ambient temperature variability over a year, the results of the analysis have proven that the increase of electricity production and efficiency due to the boil-off gas cold energy recovery has finally yield a revenue increase of 600,000€/year. National Research Foundation (NRF) The author(s) disclosed receipt of the following financial support for the research, authorship and/or publication of this article: This research was supported by the National Research Foundation, Prime Minister’s Office, Singapore under its Energy NIC grant (NRF Award No.: NRF-ENIC-SERTDSMES-NTUJTCI3C-2016). Acknowledgment also goes to Malaysian Ministry of Higher Education and Universiti Teknologi Malaysia for the research grant VOT 4L174. 2021-07-16T01:34:58Z 2021-07-16T01:34:58Z 2018 Journal Article Mazzoni, S., Rajoo, S. & Romagnoli, A. (2018). A boil-off gas utilization for improved performance of heavy duty gas turbines in combined cycle. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 233(1), 96-110. https://dx.doi.org/10.1177/0957650918772658 0957-6509 https://hdl.handle.net/10356/152123 10.1177/0957650918772658 2-s2.0-85060547185 1 233 96 110 en NRF-ENIC-SERTDSMES-NTUJTCI3C-2016 Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy © 2018 IMechE. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Boil-off Gas Combined Cycle Mazzoni, Stefano Rajoo, Srithar Romagnoli, Alessandro A boil-off gas utilization for improved performance of heavy duty gas turbines in combined cycle |
| title | A boil-off gas utilization for improved performance of heavy duty gas turbines in combined cycle |
| title_full | A boil-off gas utilization for improved performance of heavy duty gas turbines in combined cycle |
| title_fullStr | A boil-off gas utilization for improved performance of heavy duty gas turbines in combined cycle |
| title_full_unstemmed | A boil-off gas utilization for improved performance of heavy duty gas turbines in combined cycle |
| title_short | A boil-off gas utilization for improved performance of heavy duty gas turbines in combined cycle |
| title_sort | boil off gas utilization for improved performance of heavy duty gas turbines in combined cycle |
| topic | Engineering::Mechanical engineering Boil-off Gas Combined Cycle |
| url | https://hdl.handle.net/10356/152123 |
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