Waste heat utilization using organic rankine cycle from a pressurized pulverized combined cycle power plant

被引:0
作者
Choudhary, Nitesh Kumar [1 ,3 ]
Khankari, Goutam [2 ]
Karmakar, Sujit [1 ]
机构
[1] NIT Durgapur, Dept Mech Engn, Durgapur, India
[2] Damodar Valley Corp, R&D Dept, Kolkata, India
[3] NIT Durgapur, Dept Mech Engn, Mahatma Gandhi Ave,A Zone, Durgapur 713209, India
关键词
Coal; supercritical power plant; energy; exergy; organic rankine cycle; HOT FLUE-GAS; THERMODYNAMIC ANALYSIS; EXERGY ANALYSIS; ALKALI REMOVAL; 3-E ANALYSIS; RECOVERY; COAL; ENERGY; DESIGN;
D O I
10.1177/09576509241240013
中图分类号
O414.1 [热力学];
学科分类号
摘要
Power plants release a massive amount of waste heat at very low temperatures. Posing a challenge for efficient conversion into useful work through conventional methods. By selecting appropriate working fluids, low-grade power cycles can solve this problem by converting waste heat to electricity. The present work dealt with waste heat utilization using the Organic Rankine Cycle (ORC) from a 400 MWe coal based supercritical Pressurized Pulverized Combined Cycle (PPCC). The working fluid for the ORC is the refrigerant R245fa. High-ash (HA) Indian coal and low-ash (LA) South African coal are used as fuel to assess the plant's ability to produce electricity under ambient conditions in India. The simulation flowsheet program "Cycle-Tempo" models and simulates different plant layouts. The thermodynamic assessment unveiled that the standalone plant has energy and exergy efficiencies of 43.46% and 39.87% for HA & 45.42% and 43.84% for LA, respectively. According to this study, the proposed plant has energy and exergy efficiencies of 44.63% and 40.94% for HA & 46.69% and 45.07% for LA, respectively. Moreover, using ORC, the waste heat generates additional electricity of 9.38 MWe, with an energy efficiency of 12.92% and exergy efficiency of 34.63%.
引用
收藏
页码:922 / 933
页数:12
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