发布日期:2018-04-11 作者:地源热泵公司 点击:

地源热泵技术是利用地层浅层部分通过专用的PE管道使之传送地下热资源的技术,这项非常的环保,因此也受到许多人的喜爱。那么对于相关设备的连接管道又有什么要求呢?地源热泵的埋管方式是根据在现场勘测结果来决定,首先考虑现场可用地表面积、当地土壤类型以及钻孔费用,确定热交换器采用垂直竖井布置或水平布置方式。尽管水平布置通常是浅层埋管,可采用人工挖掘,初投资一般会便宜些,但它的换热性能比竖埋管小很多,并且往往受可利用土地面积的限制,所以在实际工程中,一般采用垂直埋管布置方式。 根据埋管方式不同,垂地源热泵直埋管大致有3种形式:U型管,套管型,单管型。地源热泵

Ground source heat pump technology is to use the formation of shallow part through a dedicated PE pipeline transmission underground heat resources of technology, this is very environmental protection, which is loved by many people. What are the requirements for connecting the relevant equipment? Ground source heat pump buried pipe is according to the results of the survey at the scene to decide, first consider the scene usably surface area, the local soil type and drilling cost, determine heat exchanger using vertical shaft arrangement or horizontal arrangement. While horizontal arrangement is usually shallow buried pipe, can use artificial digging, initial investment generally will be cheaper, but its heat transfer performance than vertical buried tube much smaller, and are often limited by available land area, so in the practical engineering, usually using vertical buried tube arrangement. According to the method of buried pipe, there are basically three kinds of vertical buried pipe: U tube, casing type, single pipe type.


There is heat loss in the inside and outer tube flow heat exchange. The use of single pipe type is restricted by hydrogeological conditions. U-shaped tube application, most general under 50 mm diameter, the deeper the buried pipe, the better the performance of heat transfer, the data indicate that most of U type pipe buried depth has reached 180 m. loop has three kinds of typical u-shaped tube, one of the most common use is in each shaft arrangement of the u-shaped tube.


串联或并联地下热交换器中流体流动的回路形式有串联和并联两种,串联系统管径较大,管道费用较高,并且长度压降特性限制了系统能力。并联系统管径较小,管道费用较低,且常常布置成同程式,当每个并联环路之间流量平衡时,其换热量相同,其压降特性有利于提高系统能力。因此,实际工程一般都采用并联同程式。结合上文,即常采用单 U型管并联同程的热交换器形式。

Series or parallel circuit of underground heat exchangers in the fluid flow form has two kinds of series and parallel, serial system larger diameter, higher cost of pipeline, and the length of the pressure drop characteristics of limiting the system capability. Paralleling system pipe diameter smaller, pipeline cost is low, and often decorated with the program, when the flow balance between each parallel loop, its heat transfer is the same, the pressure drop characteristics to improve system capacity. As a result, practical projects are generally adopted and combined. In combination with the above, the form of heat exchanger with single U tube and cohoming process.

选择管材一般来讲,一旦将换热器埋入地下后,基本不可能进行维修或更换,这就要求保证埋入地下管材的化学性质稳定并且耐腐蚀。常规空调系统中使用的金属管材在这方面存在严重不足,且需要埋入地下的管道的数量较多,应该优先考虑使用价格较低的管材。所以,土壤源热泵系统中一般采用塑料管材。目前最常用的是聚乙烯( PE)和聚丁烯(PB)管材,它们可以弯曲或热熔形成更牢固的形状,可以保证使用50年以上;而PVC管材由于不易弯曲,接头处耐压能力差,容易导致泄漏,因此,不推荐用于地下埋管系统。

Choice of tubing in general, once buried heat exchanger underground, basic impossible for repair or replacement, which requires the guarantee of buried pipe chemical stability and corrosion resistance. Conventional air conditioning system used in the metal pipe serious deficiencies in this respect, and the number of buried pipeline is more, should give priority to use lower prices of pipes. As a result, the soil source heat pump system usually adopts plastic tubing. The most commonly used ones are polyethylene (PE) and polybutylene (PB) pipes, which can be bent or heated to form a stronger shape and can be used for more than 50 years. The PVC pipe is not easy to bend, and the pressure capacity of the receiver is poor, so it is easy to leak, so it is not recommended for underground pipe system.


The proper embedding method can make the ground source heat pump achieve the best use effect.