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Proposal and analysis of two novel integrated configurations for hybrid solar-biomass power generation systems: Thermodynamic and economic evaluation

机译：对两种新型混合配置的太阳能-生物质发电系统的建议和分析：热力学和经济评估

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摘要

Hybridization of solar and biomass energies, as two types of renewables, represents a resourceful way of complementing each other to overcome their individual drawbacks. In the present work, two novel solar-biomass hybrid power generation systems are proposed, modeled and compared with each other as well as with the standard biomass-based system without solar energy. In both the proposed systems biomass is first gasified in a gasifier and then syngas is used in a gas turbine plant combined with a Rankine cycle. In proposed systems the solar energy is used in the bottoming Rankine cycle, where the first system employs it in an indirect way to heat the feed water before deaerator while the second system adopts the solar energy in direct steam generation mode to generate additional steam for low pressure steam turbine. Thermodynamic and economic models are developed to investigate the systems' performances from the viewpoints of energy, exergy, economic and environmental. According to the results of economic evaluation, the levelized cost of electricity for standard, the first and second proposed configurations are obtained 79.34, 79.88 and 74.94 $/MWh, respectively. Also, the values of 0.79, 0.77 and 0.62 t/MWh are calculated for CO2 emission for standard, the first and second proposed configurations, respectively.
机译：作为两种类型的可再生能源，太阳能和生物质能的杂交代表了一种相互补充以克服它们各自缺点的资源丰富的方式。在目前的工作中，提出了两个新颖的太阳能-生物质混合发电系统，并与没有太阳能的基于生物质的标准系统进行了建模和比较。在所提出的两个系统中，首先将生物质在气化炉中气化，然后将合成气用于结合兰金循环的燃气轮机装置中。在建议的系统中，太阳能被用于底部的兰金循环中，其中第一个系统以间接方式利用它来加热除氧器之前的给水，而第二个系统以直接蒸汽产生模式采用太阳能以产生额外的蒸汽以降低压力蒸汽轮机。开发了热力学和经济模型以从能源，火用，经济和环境的角度研究系统的性能。根据经济评估的结果，标准，第一种和第二种建议配置的平均电力成本分别为79.34、79.88和74.94美元/ MWh。同样，分别针对标准，第一和第二建议配置的CO2排放量分别计算出0.79、0.77和0.62 t / MWh的值。

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