1 Industrial Engineering Department, University of Florence, Florence, Italy.
2 Niccolò Cusano University, Rome, Italy.
Waste Manag Res. 2019 Apr;37(4):419-434. doi: 10.1177/0734242X19833159. Epub 2019 Mar 8.
Hybridisation of waste to energy with solar facility can take competing energy technologies and make them complementary. However, realising the benefits of solar integration requires careful consideration of the technical feasibility as well as the economic and environmental benefits of a proposed system. In this work, a solar-integrated waste-to-energy plant scheme is proposed and analysed from an energy, environmental and economic point of view. The new system integrates a traditional waste-to-energy plant with a concentrated solar power plant, by superheating the steam produced by the waste-to-energy flue gas boiler in the solar facility. The original waste-to-energy plant - that is, the base case before introducing the integration with concentrated solar power - has a thermal power input of 50 MW and operates with superheated steam at 40 bar and 400 °C; net power output is 10.7 MW, and the net energy efficiency is equal to 21.65%. By combining waste-to-energy plant with the solar facility, the power plant could provide higher net efficiency (from 1.4 to 3.7 p.p. higher), lower specific CO emissions (from 69 to 180 kg MWh lower) and lower levellised cost of electricity (from 13.4 to 42.3 EUR MWh lower) comparing with the standalone waste to energy case. The study shows that: (i) in the integrated case and for the increasing steam parameters energy, economic and ecological performances are improved; (ii) increasing the solar contribution could be an efficient way to improve the process and system performances. In general, we can conclude that concentrated solar-power technology holds significant promise for extending and developing the waste to energy systems.
废物与太阳能设施的混合能源可以将竞争能源技术结合起来，使之互补。然而，要实现太阳能综合利用的好处，需要仔细考虑技术可行性，以及所提议系统的经济和环境效益。在这项工作中，从能源、环境和经济角度提出并分析了一种太阳能综合废物能源工厂方案。新系统通过在太阳能设施中对废物能源烟道气锅炉产生的蒸汽进行过热，将传统的废物能源工厂与集中式太阳能发电厂集成在一起。原始的废物能源工厂——即在引入与集中式太阳能融合之前的基础案例——的热功率输入为 50MW，采用 40bar 和 400°C 的过热蒸汽运行；净功率输出为 10.7MW，净能源效率等于 21.65%。通过将废物能源工厂与太阳能设施相结合，该发电厂可以提供更高的净效率（提高 1.4 到 3.7 个百分点）、更低的特定 CO 排放量（降低 69 到 180kgMWh）和更低的平准化电力成本（降低 13.4 到 42.3EURMWh），与独立的废物能源情况相比。研究表明：（i）在综合案例中，随着蒸汽参数的增加，能源、经济和生态性能得到改善；（ii）增加太阳能的贡献可能是提高工艺和系统性能的有效途径。总的来说，我们可以得出结论，集中式太阳能技术为扩展和发展废物能源系统提供了巨大的潜力。
