Date of Award

2016

Document Type

Open Access Thesis

Department

Mechanical Engineering

First Advisor

Kevin Huang

Abstract

The largest source of greenhouse gas emissions in the United States is from burning fossil fuels for electricity, heat, and transportation. Due to increasing environmental constraints associated with greenhouse gas emissions and uncertainty in the supply of fossil fuels, power systems of the future will become more reliable on renewable power source. To overcome the intermittency issue of renewable power, a promising cost effective electricity-storage systems is vital. The U.S. Department of Energy (DOE) has established detailed cost targets for energy storage system. One of the targets is capital cost which should be under $150/kWh for new technology. Another target is levelized cost of electricity (LCOE) which is defined as the net cost to install energy storage system over its expected lifetime energy output. The DOE target for energy storage systems is a levelized cost of 10 ¢kWh-1cycle-1. For this reason, it is very important to evaluate the techno economic feasibility of energy storage systems for different application. The aim of this thesis is to analysis the techno-economic viability of new technology Solid oxide iron-air redox battery for stationary application.

Attention in the development of new battery technology for grid storage is growing, and considerable investments have been made into the research and development of new battery technology over the past few decades. But, implementation of new technology into the grid has been impeded by various cost and performance issues. The purpose of this study is to develop a design and techno economic model for a 5 kW/50 kWh Solid oxide iron-air redox battery (SOFeARB) storage system with a nominal cell voltage of 0.83V and current density 100mA/cm2. Rechargeable solid oxide Iron air redox battery (SOFeARB) system consists of regenerative solid oxide fuel cell (RSOFC), energy storage system (ESU), balance of plant (BOP), power conditioning system (PCS) and thermal storage tank. Expected system cost calculated $232/kwh to $309/kwh for different production volume (100, 1,000, 10,000, and 50,000 systems per year). Using the estimated capital cost, an economic analysis was performed to determine the LCOE for the system. The levelized cost for highest production volume of the delivered electricity is estimated 27.5¢kWh-1cycle-1. The major components of a SOFeARB that affect LCOE are also identified. The LCOE are also calculated for a range of different parameter values. Key findings include a high sensitivity of system levelized cost of electricity to power density, life time of storage and discharging time. The result of the sensitivity analysis can be used to make the SOFeARB system more emulous in future. Finally, we compared SOFeARB with other mature battery storage technologies to find out the position of SOFeARB in energy storage market.

Rights

© 2016, Farzana Yasmeen

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