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<p> <!--Query ID="Q1" Text="Please check if the article title is presented correctly." Resolved="yes"-->Currently, increasing the efficiency of power generation cycles is not the only goal for engineers; <!--Query ID="Q2" Text="Please confirm if the author names and their corresponding affiliations are presented accurately." Resolved="yes"-->the focus is also on how it is achieved, whether through conventional or non-conventional energy sources. In conventional systems, changing the working fluid in the bottoming cycle has attracted engineers’ interest to boost cycle efficiency. Among various working fluids, carbon dioxide and ammonia water mixtures show promising thermodynamic properties that enhance both first and second law efficiencies. This research explores the use of transcritical carbon dioxide<!--Query ID="Q3" Text="Please check abbreviation section if the provided description of the corresponding terms are captured correctly." Resolved="yes"--> as the working fluid in the bottoming cycle of a combined cycle power plant with reheat cycles. The results indicate that, under operating conditions such as a topping cycle pressure ratio of 20, an ambient temperature of 303&#xa0;K, and a turbine inlet temperature of 2000&#xa0;K, the system performs better, with first law and second law efficiencies reaching 44.8% and 56.83%, respectively. Additionally, the maximum cooling water mass flow rate, observed at a condenser pressure of 0.9&#xa0;bar, is 1.67&#xa0;kg/s.<!--Query ID="Q4" Text="As per standard instruction, city is required for affiliations; however, this information is missing in affiliation [7 and 10]. Please check if the provided city is correct and amend if necessary." Resolved="yes"--></p>

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Thermodynamic investigation on the use of transcritical carbon dioxide in a reheat gas turbine-based combined cooling and power cycle

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月15日

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  • Jyoti Singh,
  • Mayank Maheshwari,
  • Keerthi Kumar B,
  • Arun Kumar K N,
  • N. K. Mishra,
  • P. K. Mall,
  • Naveen Kumar,
  • Preethi K.H,
  • Nagesh Kumar R,
  • Vinayaka H.L,
  • Gopal Kaliyaperumal,
  • Adem Abdirkadir Aden

摘要

Currently, increasing the efficiency of power generation cycles is not the only goal for engineers; the focus is also on how it is achieved, whether through conventional or non-conventional energy sources. In conventional systems, changing the working fluid in the bottoming cycle has attracted engineers’ interest to boost cycle efficiency. Among various working fluids, carbon dioxide and ammonia water mixtures show promising thermodynamic properties that enhance both first and second law efficiencies. This research explores the use of transcritical carbon dioxide as the working fluid in the bottoming cycle of a combined cycle power plant with reheat cycles. The results indicate that, under operating conditions such as a topping cycle pressure ratio of 20, an ambient temperature of 303 K, and a turbine inlet temperature of 2000 K, the system performs better, with first law and second law efficiencies reaching 44.8% and 56.83%, respectively. Additionally, the maximum cooling water mass flow rate, observed at a condenser pressure of 0.9 bar, is 1.67 kg/s.