First steps towards green asphalt production: levelized product cost of aggregates drying with a beam-down linear Fresnel solar field

IF 7 2区 工程技术 Q1 ENERGY & FUELS
S. Taramona, J.V. Briongos, S. Sánchez-Delgado, J. Gómez-Hernández
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引用次数: 0

Abstract

The integration of solar concentrating technologies for the industrial drying and heating is a compelling approach to reduce the carbon emissions associated with low-to-mid temperature processes. This work couples the Beam-Down Linear Fresnel (BDLFR) solar technology with a conveyor belt receiver to dry and heat the virgin aggregates employed in asphalt industry. A novel lumped drying model for a fixed bed of dolomitic lime particles with low moisture content serves to explore the feasibility of the BDLFR technology for sustainable asphalt production. On-sun drying tests have been performed to validate the model for average heat fluxes of 2–5 kW/m2. It has been found that shallow beds operated with low heat fluxes received at the bed surface are not affected by horizontal mass transfer diffusion, and provide the maximum drying in the final products. The estimated BDLFR cost using a conveyor belt receiver is 366.2 per m2 of primary mirrors. The Levelized Cost of the Product calculated considers a lifetime of 20 years, an inflation rate of 3.5 % and a real discount rate of 7.6 %. The production cost of the BDLFR prototype would range between 13.6/ton<LCOP<43/ton depending on the drying time, and the average solar concentration. The solar technology might be competitive when the CO2 emission costs are CCO2=35/ton for fuel oil, and CCO2=41/ton for natural gas.
迈向绿色沥青生产的第一步:利用向下的线性菲涅耳太阳能场来降低集料干燥的产品成本
工业干燥和加热的太阳能集中技术的集成是减少与中低温过程相关的碳排放的一种引人注目的方法。这项工作将光束下线性菲涅耳(BDLFR)太阳能技术与传送带接收器结合起来,干燥和加热沥青工业中使用的原始集料。一种新的低含水率白云岩石灰颗粒固定床的集总干燥模型,用于探索BDLFR技术用于可持续沥青生产的可行性。日光干燥试验验证了该模型的平均热通量为2-5 kW/m2。研究发现,在床面接收低热流的浅床不受水平传质扩散的影响,并在最终产品中提供最大的干燥。使用传送带接收器的BDLFR估计成本为每平方米主镜366.2欧元。计算的产品平准化成本考虑20年的使用寿命,通货膨胀率为3.5%,实际贴现率为7.6%。BDLFR原型机的生产成本介于13.6欧元/吨和43欧元/吨之间,具体取决于干燥时间和平均太阳能集中程度。当燃料油的二氧化碳排放成本为35欧元/吨,天然气的二氧化碳排放成本为41欧元/吨时,太阳能技术可能具有竞争力。
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来源期刊
Sustainable Energy Technologies and Assessments
Sustainable Energy Technologies and Assessments Energy-Renewable Energy, Sustainability and the Environment
CiteScore
12.70
自引率
12.50%
发文量
1091
期刊介绍: Encouraging a transition to a sustainable energy future is imperative for our world. Technologies that enable this shift in various sectors like transportation, heating, and power systems are of utmost importance. Sustainable Energy Technologies and Assessments welcomes papers focusing on a range of aspects and levels of technological advancements in energy generation and utilization. The aim is to reduce the negative environmental impact associated with energy production and consumption, spanning from laboratory experiments to real-world applications in the commercial sector.
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