An advanced biomass gasifier-PCCI engine system for hydrogen production, power generation, and waste heat recovery: 4E analyses
Ghasem Jalivar, Elaheh Neshat
Abstract
This study presents a groundbreaking biomass gasifier–PCCI engine system that combines waste heat recovery for simultaneous hydrogen and power generation. The system is assessed in terms of energy, exergy, exergoeconomics, environmental impact, and techno-economic performance. A parametric analysis examines the effects of EVO, biomass type, H 2 %, SB ratio, and equivalence ratio on energy and exergy efficiency, as well as the total specific cost rate. The first and second law efficiencies are 34.11 % and 30.04 %, respectively. Exergoeconomic analysis shows a total cost rate of $31/h and a specific cost of $73.85/GJ, with f k of 12.3 % and r k of 232.9 %, highlighting the importance of reducing exergy destruction—particularly in the evaporator. Environmental evaluation finds CO 2 emissions at 0.1428 t/GJ. The parametric study results show that SB ratio and biomass type mainly influence energy and exergy efficiency, while H 2 % and biomass type primarily affect specific cost. Economic assessment concludes that the system is not viable under the determined operating conditions. However, scaling up the system can improve its economic performance.