Assessing domestic heat storage requirements for energy flexibility over varying timescales

Assessing domestic heat storage requirements for energy flexibility over varying timescales
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评估不同时间范围内能源灵活性的国内储热需求

DOI:
10.1016/j.applthermaleng.2018.02.104
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发表时间:
2018
影响因子:
6.4
通讯作者:
Allison J
Allison J
中科院分区:
工程技术2区
文献类型:
--
作者:
Allison J

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本文探讨了在封装存储器中存储热量的可行性,以支持在三个时间尺度上的热负荷转移:昼夜,每周和季节。建筑模拟工具被用来计算四个常见的英国住房类型和一系列的操作条件下的空间供暖和热水需求。一种自定义的大小调整方法计算了在三个时间尺度上完全满足热量需求所需的存储容量。相应的存储量计算的范围内的热存储材料被认为是适合于存储热量的住宅,无论是在一个坦克或作为建筑结构的一个组成部分:热水,混凝土,高温磁铁矿块,和相变材料。结果表明,在低温蓄热的情况下,生活负荷转移在几天内是可行的。超过这一时间尺度,所需的非常大的存储量使住宅的一体化成为问题。在高温储存条件下,支持1-2周的负荷转移是可行的。即使有很高的隔热水平,在比这更长的时间内保持热量也是具有挑战性的。由于所需材料的体积,在所有模拟的情况下,在密封的贮物中进行季节性的热贮存似乎都是不切实际的。
This paper explores the feasibility of storing heat in an encapsulated store to support thermal load shifting over three timescales: diurnal, weekly and seasonal. A building simulation tool was used to calculate the space heating and hot water demands for four common UK housing types and a range of operating conditions. A custom sizing methodology calculated the capacities of storage required to fully meet the heat demands over the three timescales. Corresponding storage volumes were calculated for a range of heat storage materials deemed suitable for storing heat within a dwelling, either in a tank or as an integral part of the building fabric: hot water, concrete, high-temperature magnetite blocks, and a phase change material. The results indicate that with low temperature heat storage, domestic load shifting is feasible over a few days. Beyond this timescale, the very large storage volumes required make integration in dwellings problematic. Supporting load shifting over 1–2 weeks is feasible with high temperature storage. Retention of heat over periods longer than this is challenging, even with significant levels of insulation. Seasonal storage of heat in an encapsulated store appeared impractical in all cases modelled due to the volume of material required.
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