An experimental setup is devised to investigate the behaviour of a novel type of a horizontal ground heat exchanger (HGHE). The prototype is named ‘flat panel' and is coupled with a hydraulic closed loop in which warm water is circulating to express the cooling mode from a reversible-cycle heat pump. Several thermal sensors are employed in the experimental field to monitor the ground temperature distribution and the fluid. The behaviour was tested during the summer of 2011, in the continuous and discontinuous operating mode. The HGHE behaviour was monitored in dry and wet conditions; the latter were induced with a dedicated irrigation system. The heat power for the unit exchanging surface dropped down from 140 to 40 W per metre of trench, moving from the start-up to the last period, late in the summer. The minimum was achieved in very hot conditions after long time in the continuous operating mode. When the working mode was switched to discontinuous, the power increased quickly over 50 W/m. Finally, the soil temperature was significantly altered up to 3 m far from the exchanger, and without over-heating conditions at the soil surface. The flat panel was able to involve a large soil volume, and this behaviour in turn enables high-energy performance, at least in the cooling mode.
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机译:设计了一个实验装置来研究新型水平地面热交换器(HGHE)的性能。该原型机名为“平板”,并与一个液压闭环相连,在液压闭环中循环热水,以表示可逆循环热泵的冷却方式。在实验领域中使用了几种热传感器来监测地面温度分布和流体。该行为在2011年夏季以连续和不连续的操作模式进行了测试。在干燥和潮湿条件下监测HGHE行为;后者是通过专用灌溉系统诱导的。从开始运行到夏季末期的最后一个阶段,单位交换表面的热功率从每米沟槽140 W降至40W。在连续运行模式下长时间工作后,在非常热的条件下达到了最小值。当工作模式切换为不连续模式时,功率迅速增加到50 W / m以上。最后,在距换热器最远3 m处,土壤温度发生了显着变化,并且在土壤表面没有过热条件。平板能够容纳大量的土壤,并且这种行为反过来又使至少在冷却模式下具有高能效。
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机译:液压测试设备的技术综合体ELEMENTS换热单元和热交换器的换热单元,用于液压系统的管道的夹紧装置,用于管道设备的液压测试的液压系统,用于弯曲管道的液压测试的安装液压系统MACHINE,液压测试台弯管机,方法液压测试弯管单元(RU),液压系统液压测试设备和热交换器单元STAND FOR DRY MACHINE换热单元(可选)