ENERGY INVESTIGATION OF ADVANCED HYDROGEN AND POWER GENERATION SYSTEM BASED ON HYBRID SULFUR AND LITHIUM BROMIDE ABSORPTION POWER CYCLE

Abstract

The study aims to improve the solar hybrid sulfur cycle (Shysc) thermal efficiency. The Shysc waste heat is utilized for power generation by integrating the lithium bromide-water absorption power cycle (LiBr-H2O APC). The developed cogeneration integrated system produces 4.967 moles of hydrogen and 1.22 MW at an efficiency of 60% according to the first law of thermodynamics. The advanced system is 30% more efficient than a conventional hybrid sulfur cycle (Chysc). The efficiency development is due to utilizing the waste heat in the Chysc and converting it into useful power by (LiBr-H2O APC). Increasing the process's consumed energy harms the system's efficiency. The largest amount of energy is consumed by the thermal cracking process, which reached 69% of the overall energy. Likewise, the electrolyser performance affects the overall efficiency. As the electrolyser performance increases, the amount of converted sulfur dioxide increases and thus, leads to an increase in the amount of produced hydrogen, which enhances the system's efficiency.