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首页> 外文期刊>Low Carbon Economy >The “District Heating Wall”: A Synergistic Approach to Achieve Affordable Carbon Emission Reductions in Old Terraced Houses
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The “District Heating Wall”: A Synergistic Approach to Achieve Affordable Carbon Emission Reductions in Old Terraced Houses

机译：“区域供暖墙”：以协同方式实现旧排屋的可负担的碳减排

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One effective method to help the UK achieve GHG emission reduction targets is to reduce and decarbonise the heat demand of solid-walled terraced houses, as there are over 2.5 million such buildings making up a significant proportion of the whole building stock. Currently measures are achieved separately: the heat demand could be reduced by application of External Wall Insulation (EWI) or decarbonised through low carbon heat supplied by District Heating Networks (DHN). However, when installed individually, both these technologies face economic cost barriers. This study presents a novel solution that combines district heating pipes into external wall insulation—the District Heating Wall (DHWall) —and provides a systematic and quantitative assessment on its effects on the heating loads and its associated carbon emissions and capital costs. First a dynamic thermal model was developed to predict the heat demand of a case study terraced house with and without EWI. Two district heating networks were then sized to transport the required heat to the house-conventional and DHWall. The DHWall was compared to existing options and initial design parameters cal- culated. The study found application of EWI reduced space heating demand by 14%. The DHWall could reduce mains pipe inside diameter by 47% and reduce network pipe lengths by 20% and require no civils cost. Together these factors reduced DH capital costs by 76%. For one terraced house, the DHWall saved 34 tonnes of carbon over a 20year period compared to 8tonnes saved by EWI alone. Such savings were achieved at 39% of the cost/tonne. The mains pipe of the DHWall was calculated to have an inside diameter of 32.6 mm. The minimum insulation thickness required for solid walls to reach U-values of 0.3 W/m2K was calculated to be 120 mm of mineral wool or 65 mm of phenolic foam. The study concludes the DHWall has potential to contribute to GHG emission reductions by increasing market penetration of DH and EWI and should be investigated further.
机译：帮助英国实现温室气体减排目标的一种有效方法是减少和脱碳实心排屋的热量需求，因为有超过250万栋此类建筑物在整个建筑存量中占很大比例。当前的措施是单独实现的：可以通过应用外墙保温（EWI）来降低热需求，或者通过区域供热网络（DHN）提供的低碳热来使碳脱碳。然而，当单独安装时，这两种技术都面临着经济成本的障碍。这项研究提出了一种新颖的解决方案，该方案将区域供热管与外墙保温材料结合在一起，即区域供热墙（DHWall），并提供了系统和定量的评估方法，该方法对供热负荷以及相关的碳排放和资本成本产生了影响。首先，开发了一个动态热模型，以预测带有和不带有EWI的排屋案例研究的热量需求。然后确定两个区域供热网络的大小，以将所需的热量传输到常规住宅和DHWall。将DHWall与现有选件进行了比较，并计算了初始设计参数。研究发现EWI的应用使空间供暖需求减少了14％。 DHWall可以将主管的内径减少47％，将网络管道的长度减少20％，并且不需要土建费用。这些因素共同将DH的资本成本降低了76％。对于一栋排屋，DHWall在20年的时间里节省了34吨碳，而仅EWI节省了8吨碳。这样的节省达到了每吨成本的39％。 DHWall的主管计算得出其内径为32.6 mm。计算得出，实心墙达到U值0.3 W / m2K所需的最小绝缘厚度为120毫米矿棉或65毫米酚醛泡沫。研究得出的结论是，DHWall有潜力通过增加DH和EWI的市场渗透率来减少温室气体排放，应进一步研究。

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