Abstract
The use of biomass due to the reduction in greenhouse gas emissions and environmental impacts has attracted many researchers’ attention in the recent years. Access to an energy conversion system which is able to have the optimum performance for applying valuable low heating value fuels has been considered by many practitioners and scholars. This paper focuses on the accurate modeling of biomass gasification process and the optimal design of a multigeneration system (heating, cooling, electrical power, and hydrogen as energy carrier) to take the advantage of this clean energy. In the process of gasification modeling, a thermodynamic equilibrium model based on Gibbs energy minimization is used. Also, in the present study, a detailed parametric analysis of multigeneration system for undersigning the behavior of objective functions with changing design parameters and obtaining the optimal design parameters of the system is done as well. The results show that with exergy efficiency as an objective function this parameter can increase from 19.6% in base case to 21.89% in the optimized case. Also, for the total cost rate of system as an objective function it can decrease from 154.4 $/h to 145.1 $/h.
Highlights
One important issue which has attracted the attention of researchers in the recent years is the environmental problems and use of renewable energy sources to mitigate the global warming effects in energy conversion systems
Biomass is clean and available and is a type of renewable energy source that is derived from biomass resources
Biomass energy can be used for direct combustion or gasification process
Summary
One important issue which has attracted the attention of researchers in the recent years is the environmental problems and use of renewable energy sources to mitigate the global warming effects in energy conversion systems. The use of biomass as a clean fuel with organism sources as a suitable fuel with high conversion efficiency has been considered by many researchers. The use of renewable fuels can significantly help reduce the effects of greenhouse gases and global warming phenomenon. The main objectives of a multigeneration system include increase in efficiency, reduction in the environmental impacts, and reduction in final cost rate of products. Some studies have been done on trigeneration systems as a type of multigeneration and the use of renewable energies as the prime mover of such systems
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