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首页> 外文学位 >Influence du stockage thermique dans la structure du bâtiment sur les systemes de pompes a chaleur geothermiques.
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Influence du stockage thermique dans la structure du bâtiment sur les systemes de pompes a chaleur geothermiques.

机译：建筑结构中的蓄热对地热热泵系统的影响。

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摘要

The length reduction potential of a vertical, closed loop geothermal heat exchanger linked to a thermally activated building system (TABS) that uses the thermal energy storage in the concrete floor is analysed. The ground floor of a typical commercial building in Montreal (Canada) is modeled in the TRNSYS simulation environment to study the coupling of geothermal heat pumps with a slab-on-grade TABS during the heating season.;Different daily operation scenarios of the geothermal heat exchanger are studied. Results show that a 24 hour leveling of the ground thermal load during the heating season produces only a 4 % length reduction of the geothermal heat exchanger, which demonstrates the need to reduce the installed geothermal heat pump capacity to impact significantly the heat exchanger's length. Three design parameters of the TABS are analysed: the slab thickness and the depth and spacing of its embedded piping. It is shown that increasing the slab thickness from 100 to 200 mm (4 to 8 inches) compensates an 8.3 % reduction of the installed capacity of the heat pumps. An increase of the heat pump's energy consumption is observed with an increased depth of the slab's embedded piping, caused by the increased thermal resistance between the piping and the floor and the increased thermal losses beneath the slab-on-grade. Finally, a tightly spaced embedded piping results in a more efficient heat transfer between the fluid and the concrete, which increases the heat pump's coefficient of performance (COP).;A comparison with an equivalent fan-coil heating system shows that the required length of the geothermal heat exchanger is 25 % greater for the TABS. This difference can be explained by the reduction of the fluid heating temperature for the TABS, which increases the heat pump's average COP. This is also accompanied by a 21 % reduction in the energy consumption. Finally, comparing the thermal energy storage in the concrete with water tanks shows that the former is beneficial for the TABS where the latter offers better results with the fan-coil heating system. Finally, it is shown that a reduction of the heat pumps installed capacity of 8.3 % leads to a maximum reduction of the heat exchanger's length of 10.1 % and 8.4 % for the TABS and fan-coil heating systems, respectively.
机译：分析了与使用混凝土地板中的热能存储的热激活建筑系统（TABS）链接的垂直，闭环地热热交换器的长度减小潜力。在TRNSYS仿真环境中对加拿大蒙特利尔一幢典型商业建筑的底层进行了建模，以研究供暖季节中地热热泵与平板式TABS的耦合;不同的地热日常运行方案交换器的研究。结果表明，在供暖季节中24小时的地面热负荷水平只会使地热热交换器的长度减少4％，这表明需要减少已安装的地热热泵的容量，以显着影响热交换器的长度。分析了TABS的三个设计参数：平板厚度以及其嵌入式管道的深度和间距。结果表明，将板坯厚度从100毫米增加到200毫米（4英寸到8英寸）可以补偿热泵安装容量的8.3％的降低。随着板坯埋入式管道深度的增加，观察到热泵能耗的增加，这是由于管道与地面之间的热阻增加以及地上平板下的热损失增加所致。最后，紧密排列的嵌入式管道可提高流体与混凝土之间的传热效率，从而增加了热泵的性能系数（COP）.;与等效的风机盘管加热系统进行比较表明，所需的长度TABS的地热热交换器要大25％。这种差异可以通过降低TABS的流体加热温度来解释，这会增加热泵的平均COP。同时，能耗也降低了21％。最后，将水箱中混凝土的热能存储进行比较表明，前者对TABS有利，后者通过风机盘管加热系统可提供更好的效果。最后，结果表明，对于TABS和风机盘管加热系统，热泵安装容量的减少8.3％导致热交换器长度的最大减少分别为10.1％和8.4％。

著录项

  • 作者

    Levesque, Mathieu.;

  • 作者单位

    Ecole Polytechnique, Montreal (Canada).;

  • 授予单位 Ecole Polytechnique, Montreal (Canada).;
  • 学科 Mechanical engineering.
  • 学位 M.Sc.A.
  • 年度 2012
  • 页码 137 p.
  • 总页数 137
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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