Sizing and Techno-economic Analysis of Hybrid-Combined Heat and Power -PV- Battery Storage Systems of Commercial and Industrial Buildings
Open Access
- Author:
- He, Zhanwei
- Graduate Program:
- Architectural Engineering
- Degree:
- Master of Science
- Document Type:
- Master Thesis
- Date of Defense:
- April 01, 2018
- Committee Members:
- James Freihaut, Thesis Advisor/Co-Advisor
Donghyun Rim, Committee Member
Gregory Scott Pavlak, Committee Member - Keywords:
- Combined Heat and Power
Micro-grid
solar power
hybrid system
HOMER - Abstract:
- This paper focuses on simulating hybrid solar energy-combined heat and power-battery storage systems with different sizes, types, and number to determine the optimal system configurations with the goal of minimizing life-cycle cost and maximizing fossil energy savings. A micro-grid solar photovoltaic generation subsystem operated in parallel with, a gas-fired engine and a battery storage subsystem and operating within a macro-grid connected environment is modeled. The hybrid system supplies the micro-grid system dynamic electrical and thermal demands, which is simulated by HOMER (Hybrid Optimization of Multiple Electric Renewables). In this study, solar energy is to meet the peak micro-grid system electrical demand. Considering the fluctuations of solar energy production, the gas-fired engine is used to supply unmet, micro-grid electrical demands. The engine is sized with part load operating characteristics to allow excess PV-engine-battery generation for sales back to macro-grid on high solar flux, high macro-grid demand days. Because the hybrid system choices could change with key factors variations, this study takes into account some factors, like demand profile from two building types, initial component installment cost, and the energy price to make technical and economic analysis. For instance, commercial and industrial buildings with different electrical and thermal demand profile should be considered separately and decreasing PV system price and fuel price could be an opportunity for hybrid system. Also, the study evaluates the potential impact of dispatch strategies on energy savings and explore the correlations between each operating component size and energy cost.