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Heat exchanger of underground of land source hot pump and building the nest craf
From;    Author:Stand originally
Land source heats up pump with its efficient, environmental protection, energy-saving wait for a lot of advantage development is swift and violent, representing energy-saving model the development trend of central air conditioning. Land source hot pump has perpendicular a variety of application means such as the type that bury a canal, surface water type, groundwater type. Among them the perpendicular means that bury a canal has heat exchange efficiency system of heat exchange of tall, underground covers an area of the advantage with small area, but because invest first taller and application is restricted. House of drilling construction cost does not fall high is to cause taller main reason invests first.

One, craft introduction
Soil of peaceful wave area is perpendicular distributing to basically can differentiate it is 4: Claypan of claypan, silty layer, opaque and powdery sand bed. Layer of this area earth is softer and ply is big, reason building must use deep base, building foundation is with prefab canal picket and perfusion picket are given priority to, use subterranean heat exchanger and structure aptly the nest craft of picket radical.
1, the U inside prefab canal picket heat exchanger tube lays craft
Prefab canal picket basically is ferroconcrete sincere picket or empty canal picket, also have stake or steel stake. Be in charge of stake stake to be in charge of a diameter for nothing among them general 400mm, 550mm, tube wall is large for 80mm, intermediate cavity diameter is 240mm, 390mm, the U that set sheet heat exchanger tube or double U heat exchanger tube can be buried inside cavity, achieve the goal of economic construction cost.
Next canals are one of keys in project of land source hot pump, because issue tubal deepness how to much decide to adopt caloric, must assure to issue tubal deepness so. Before be in charge of below, answer to bind U heat exchanger tube and canal of form a vesicle together, take the step that avoids U canal rise. In prefab canal picket mouth handles the gasket goods that places gunny-bag and so on, the heat exchanger tube in the process wears away and bring about the function such as its compression in order to prevent next canals to drop.

2, the U inside perfusion picket and subterranean diaphragm wall heat exchanger tube lays craft
Perfusion picket is basket of reinforcing steel bar falls inside the hole that has drilled and perfusion concrete and the deep base that builds. Subterranean diaphragm wall is a paragraph of long and narrow deep chamfer is dug to subterranean getting below the condition that protects a wall in slop, inside groove condole puts basket of reinforcing steel bar, next perfusion concrete, build concrete of bone of a paragraph of reinforcing steel bar wall paragraph, and each wall paragraph join of one by one rises form a successive underground wall.
Because the aperture of perfusion picket is bigger, can be on basket of reinforcing steel bar place much group U canal to be in picket body interior is OK and shunt-wound gather together (OK also and proper series connection) hind body of again derivative picket, derivative canal should do good safeguard to be built in order to prevent earth just be opposite U heat exchanger tube is destroyed when picket head undertakes handling. U heat exchanger tube can be placed the inside of basket of reinforcing steel bar, also can place of basket of reinforcing steel bar outside side, plunge into belt general with nylon its are fixed it is on basket of reinforcing steel bar, had done the protection to U canal.
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