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A comparative study of biomass integrated gasification combined cycle power systems: Performance analysis
Guiyan Zang1, Sharma Tejasvi1, Albert Ratner1
1Department of Mechanical and Industrial Engineering, The University of Iowa, Iowa, IA 52242, USA.
Bioresource Technology
|February 11, 2018
Summary
Biomass Integrated Gasification Combined Cycle (BIGCC) power systems offer high efficiency. This study reveals external combustion gas turbines and Selexol CO2 removal enhance BIGCC performance, with efficiency ranging from 22.3% to 37.1%.
Area of Science:
- Energy Engineering
- Thermodynamics
- Environmental Science
Background:
- Biomass Integrated Gasification Combined Cycle (BIGCC) systems are a promising avenue for efficient biomass energy generation.
- A comprehensive comparative analysis of recent advancements in BIGCC systems, including gasification agents, gas turbine combustion, and CO2 capture, is lacking.
Purpose of the Study:
- To evaluate the impact of recent technological improvements on BIGCC system performance.
- To conduct a comparative analysis of different BIGCC configurations using exergy analysis.
Main Methods:
- Utilized Aspen Plus simulation software for detailed thermodynamic modeling.
- Performed exergy analysis to assess system efficiencies and identify areas of exergy destruction.
- Conducted sensitivity analyses on key operational parameters.
Main Results:
- Exergy efficiencies for the studied BIGCC systems ranged from 22.3% to 37.1%.
- Gas turbines employing external combustion demonstrated higher exergy efficiency.
- The Selexol method for CO2 removal exhibited minimal exergy destruction.
Conclusions:
- Recent advancements significantly impact BIGCC performance, with external combustion gas turbines and Selexol CO2 capture being key contributors to higher efficiency.
- System exergy efficiency is highly sensitive to gas turbine parameters (initial temperature, pressure ratio) but less so to steam turbine parameters.
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