开发、验证和演示用于系统模拟和优化的新型 Modelica 坑式热能储存模型

IF 2.9 2区 地球科学 Q3 ENERGY & FUELS
Julian Formhals, Xenia Kirschstein, Abdulrahman Dahash, Lukas Seib, Ingo Sass
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引用次数: 0

摘要

空间供热应用在全球温室气体排放中占很大比例。为了提高可再生能源在供热中所占的比例,可以利用季节性热能储存(STES)技术,在需求量大的时候从波动的可再生能源中获取热能。一种流行的季节性热能储存技术是坑式热能储存(PTES),即利用水作为储存介质将热量储存在地下。要评估能源系统中 PTES 的使用情况,需要建立易于调整、公众可访问且独立于工具的模型。在本文中,我们改进了用 Modelica 建模语言开发的现有 PTES 模型。考虑到不同的绝缘量,我们将该模型与更详细的、先前经过验证的 COMSOL 模型进行了交叉比较,结果显示,观测到的年充放电热量偏差为 2-13%。结果表明,所提出的模型非常适合早期设计阶段,并进行了示范案例研究,以证明其在系统环境中的适用性。在有补贴和无补贴的情况下,系统组件的尺寸都根据热量平准化成本(LCOH)进行了优化,突出了补贴对过渡到气候友好型供热解决方案的重要性,因为燃气锅炉的使用率从 47.6% 降低到 2.7%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development, validation and demonstration of a new Modelica pit thermal energy storage model for system simulation and optimization

Space heating applications account for a high share of global greenhouse gas emissions. To increase the renewable share of heat generation, seasonal thermal energy storage (STES) can be used to make thermal energy from fluctuating renewable sources available in times of high demand. A popular STES technology is pit thermal energy storage (PTES), where heat is stored underground, using water as a storage medium. To evaluate the use of PTES in an energy system, easily adaptable, publicly accessible and tool independent models are needed. In this paper, we improve an existing PTES model developed in the Modelica modeling language. The model is cross-compared with a more detailed and previously validated COMSOL model, considering different amounts of insulation, showing a deviation of 2–13% in the observed annual charged and discharged amount of heat. The results indicate that the presented model is well suited for early design stage and an exemplary case study is performed to demonstrate its applicability in a system context. Dimensions of system components are optimized for the levelized cost of heat (LCOH), both with and without subsidies, highlighting the importance of subsidies for the transition towards climate friendly heating solutions, as the gas boiler use is reduced from 47.6% to 2.7%.

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来源期刊
Geothermal Energy
Geothermal Energy Earth and Planetary Sciences-Geotechnical Engineering and Engineering Geology
CiteScore
5.90
自引率
7.10%
发文量
25
审稿时长
8 weeks
期刊介绍: Geothermal Energy is a peer-reviewed fully open access journal published under the SpringerOpen brand. It focuses on fundamental and applied research needed to deploy technologies for developing and integrating geothermal energy as one key element in the future energy portfolio. Contributions include geological, geophysical, and geochemical studies; exploration of geothermal fields; reservoir characterization and modeling; development of productivity-enhancing methods; and approaches to achieve robust and economic plant operation. Geothermal Energy serves to examine the interaction of individual system components while taking the whole process into account, from the development of the reservoir to the economic provision of geothermal energy.
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