Abstract
In response to the need for clean and efficient energy conversion technology, a new hybrid power generation system using biomass as fuel is proposed. The system consists of a biomass gasification device, a solid oxide fuel cell, an engine and a waste heat recovery subsystem. The thermodynamic modeling of the system was established by Aspen Plus. Based on the modeling results, parametric analysis was conducted to investigate the influence of key parameters on the performance of the system. Besides, bi-objective optimization was conducted to maximize the exergy efficiency and simultaneously to minimize the specific electric energy cost via the Epsilon-constraint approach. The results showed that the net electrical efficiency of the system increases from 47.3% to 50.3% with the increase of the steam to biomass ratio and also increases from 45.5% to 48.2% with the increase of fuel utilization factor. The efficiency of power generation tends to decrease with the increase of biomass and air equivalent ratio. It was found, at the Pareto optimum solution, the hybrid power generation system can achieve an optimal exergy efficiency of 53.5% and specific electric energy cost of 0.0576 USD/(kW•h). The specific electrical energy cost is comparable to the energy cost (0.0546 USD/(kW•h)) of the standard power plant and is 19.6% lower than the natural gas-fueled SOFC-Engine system, indicating that the proposed biomass fueled hybrid system is a kind of clean, efficient and economical energy conversion technology.
| Translated title of the contribution | Parameter analysis and optimization of power and heat cogeneration system with biomass fueled SOFC and engine |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 1089-1099 |
| Number of pages | 11 |
| Journal | Huagong Xuebao/Journal of Chemical Industry and Engineering (China) |
| Volume | 72 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2021 |