Evaluation of low temperature waste heat as a low carbon heat resource in the UK
Evaluation of low temperature waste heat as a low carbon heat resource in the UK
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DOI：
10.1016/j.applthermaleng.2023.121283
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发表时间：
2023-08-22
影响因子：
6.4
通讯作者：
Maidment, G.
中科院分区：
文献类型：
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作者：
Davies, G.;Lagoeiro, H.;Maidment, G.
废热的捕获和运输为建筑物供暖的脱碳提供了巨大的机会。迄今为止，大多数高温废热已被重新利用和报道。然而，随着最近低温和环境温度（第4代和第5代）区域能源网络的出现，从一系列新颖的低温源中回收和利用热量有了空间。目前的研究代表了量化这一机会规模的首次尝试之一，特别关注英国，并补充了之前通过关注一系列新来源来估计低温废热的少数尝试。所采用的方法是评估一些低温废热源，以确定：(a)每年产生的废热量；(b)每个热源的余热温度。在许多情况下，这是使用从作者早期调查中得出的方法和假设来实现的。还讨论了每个热源的相对优点和潜力，涉及位置，与最终用户的接近程度，使用热泵升级的需要，供应的连续性和再利用的分配选择，例如通过使用不同工作温度的区域能源网络。本研究中所考虑的英格兰、威尔士和北爱尔兰的热源所确定的废热能量总量估计为572太瓦时。a1，这将占这些国家供暖总能耗（432太瓦时）的132%。A1)。虽然这项研究的重点是英国低温废热的潜力，但开发的估计方法和结果分析是通用的，也可以应用于其他国家。
The capture and transport of waste heat represents a great opportunity for the decarbonisation of heat supply in buildings. To date, mostly high temperature waste heat has been reused and reported. However, with the recent advent of low and ambient temperature (4th and 5th generation) district energy networks, there is scope for the recovery and utilisation of heat from a range of novel, low temperature sources. The current study represents one of the first attempts to quantify the size of this opportunity, with particular focus in the UK, and complements the few previous attempts at estimating low temperature waste heat by focussing on a range of novel sources. The approach used was to evaluate a number of low temperature waste heat sources to determine: (a) the annual quantity of waste heat generated; and (b) the temperature(s) of the waste heat, for each heat source. In many cases, this was achieved using methodology and assumptions derived from the authors' earlier investigations. The relative merits and potential of each heat source are also discussed, with respect to location, proximity to end users, need for upgrade using a heat pump, continuity of supply and distribution options for reuse, for example by using district energy networks with different operating temperatures. The total quantity of waste heat energy identified from the heat sources considered in this study, for England, Wales and Northern Ireland, was estimated to be 572 TWh.a 1, which would represent 132% of the total energy consumption for heat in these countries (432 TWh.a 1). Although this study focused on the UK potential for low temperature waste heat, the estimation methods developed and resulting analysis are generic and could also be applied in the context of other countries.