Department of Mineral Resources and Energy Engineering, Jeonbuk National University, 54897, Jeonju, Republic of Korea.
Department of Environment and Energy, Jeonbuk National University, 567, Bakeje-daero, Deokjin-gu, Jeonju, Republic of Korea.
Chemosphere. 2022 Mar;290:133245. doi: 10.1016/j.chemosphere.2021.133245. Epub 2021 Dec 13.
Solar biomass hybridization is a promising energy technique for efficient utilization while mitigating the disadvantages associated with both biomass and solar energy source. In conventional concentrating solar power (CSP) systems, the contribution of solar energy is relatively low, merely supplementing the system with low/medium temperature air/steam. This paper aimed to emphasize the improvement of solar heat share, particularly in the topping cycle of the hybrid system. The solar aided processes, either directly generating superheated air/steam or direct gasification are thermodynamically favorable at very high temperatures, in excess of 800 °C. Unfortunately, this temperature is unattainable in conventional CSP systems using molten salt. Accordingly, the integration of solar power tower (SPT) with solid particle fluidized system in a beam down configuration has been proposed for the hybrid solar-biomass systems. Studies of such integration system presented challenges in terms of operating temperature, continuous supply/syngas production and scaling of reactor, particularly for circulating fluidized bed (CFB). The selection of solid particle and gas flow rate are among the governing parameters for high operating temperature and effective utilization of solar heat. The development of high temperature hybrid solar-biomass system is anticipated for higher solar-to-fuel conversion efficiencies, minimizing the direct combustion of biomass and reduce the emission of greenhouse gas (GHG) emissions.
太阳能生物质混合是一种很有前途的能源技术，可以在利用生物质和太阳能的同时，减少它们各自的缺点。在传统的太阳能聚光系统（CSP）中，太阳能的贡献相对较低，仅为系统提供低/中温空气/蒸汽。本文旨在强调提高太阳能的份额，特别是在混合系统的顶循环中。太阳能辅助过程，无论是直接产生过热空气/蒸汽还是直接气化，在非常高的温度下（超过 800°C）都是热力学上有利的。然而，在传统的使用熔盐的 CSP 系统中，这个温度是无法达到的。因此，已经提出了将太阳能塔式（SPT）与固体颗粒流化床系统以向下配置的方式集成到混合太阳能-生物质系统中。这种集成系统的研究在操作温度、连续供应/合成气生产和反应器的放大方面提出了挑战，特别是对于循环流化床（CFB）。固体颗粒和气体流速的选择是实现高温操作和有效利用太阳能的主要参数之一。开发高温混合太阳能-生物质系统有望提高太阳能到燃料的转换效率，最大限度地减少生物质的直接燃烧，并减少温室气体（GHG）的排放。
