Design of Clean Steel Production with Hydrogen: Impact of Electricity System Composition
Design of Clean Steel Production with Hydrogen: Impact of Electricity System Composition
复制标题
氢清洁钢生产设计：电力系统组成的影响
DOI：
10.3390/en14248349
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发表时间：
2021
期刊：
影响因子：
3.2
通讯作者：
F. Johnsson
中科院分区：
文献类型：
--
作者：
Alla Toktarova;L. Göransson;F. Johnsson
在欧洲，电气化被认为是实现钢铁清洁生产的关键选择，同时电力系统生产组合预计将包括越来越多的各种可再生电力(VRE)发电，主要是以太阳能光伏和风力发电的形式。我们研究了以VRE为主的电力系统中氢基炼钢的成本效益设计。我们开发和应用了一个具有小时时间分辨率的线性成本最小化模型，该模型确定了氢基炼钢中包括电解槽、直接还原竖井、电弧炉以及氢气和热压球团储存在内的设备的成本最优操作和规模。我们表明，炼钢后的电价导致运营成本的节省，但由于投资于钢铁生产装置和氢气和热压球团储存装置的产能过剩，导致资本成本增加。对于VRE占主导地位的两个地区，我们表明，与恒定水平的连续钢铁生产相比，钢铁生产后的电价分别降低了23%和17%的总钢铁生产成本。我们还表明，炼钢过程的成本最优设计取决于电力系统的组合。
In Europe, electrification is considered a key option to obtain a cleaner production of steel at the same time as the electricity system production portfolio is expected to consist of an increasing share of varying renewable electricity (VRE) generation, mainly in the form of solar PV and wind power. We investigate cost-efficient designs of hydrogen-based steelmaking in electricity systems dominated by VRE. We develop and apply a linear cost-minimization model with an hourly time resolution, which determines cost-optimal operation and sizing of the units in hydrogen-based steelmaking including an electrolyser, direct reduction shaft, electric arc furnace, as well as storage for hydrogen and hot-briquetted iron pellets. We show that the electricity price following steelmaking leads to savings in running costs but to increased capital cost due to investments in the overcapacity of steel production units and storage units for hydrogen and hot-briquetted iron pellets. For two VRE-dominated regions, we show that the electricity price following steel production reduces the total steel production cost by 23% and 17%, respectively, as compared to continuous steel production at a constant level. We also show that the cost-optimal design of the steelmaking process is dependent upon the electricity system mix.