Author ORCID Identifier

https://orcid.org/0009-0000-3043-8466

Semester

Spring

Date of Graduation

2023

Document Type

Thesis

Degree Type

MS

College

Statler College of Engineering and Mineral Resources

Department

Chemical and Biomedical Engineering

Committee Chair

Debangsu Bhattacharyya

Committee Member

Yuhe Tian

Committee Member

Oishi Sanyal

Abstract

There are considerable efforts worldwide for reducing the use of fossil fuel for energy production. While renewable energy sources are being increasingly used, fossil fuel still contribute about 80% of the energy used worldwide. As a result, the level of CO2 is still increasing fast in the atmosphere currently exceeding about 410 parts per million (ppm). For reducing CO2 build up in the atmosphere, various approaches are being investigated. For the electric power generation sector, two key approaches are post-combustion CO2 capture and use of hydrogen as a fuel for power generation. These two solutions can also be integrated together in a flexible power plant configuration.

This research presents two novel energy systems where hydrogen is being utilized in a power plant for the co-firing of natural gas. The first system is NGCC power plant integrated with a post combustion carbon capture technology and hydrogen production unit. The second system is a standalone Peaker plant (simple cycle plant) integrated with hydrogen production unit. The techno-economic analysis of these two systems will enable us to understand the optimal design and operational performance of this energy systems.

The Net Present Value (NPV) optimization was used for the techno-economic analysis of the two energy systems at different conditions. Different tax scenario was also investigated for the electricity price (LMP) used in the optimization scheme. As part of development of optimization work, reduced order models (ROM) were developed for the more sophisticated and nonlinear models of the standalone models. A clustering algorithm with a derivative consideration was also developed to reduce the number of optimization days needed for a year-long optimization. For these two-hydrogen utilization configuration, the optimal design conditions of the hydrogen production unit were decided, and it was shown that these optimal values change with the electricity market profiles.

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