![]() A Unicoil is comprised of a manufactured u-bend that is factory fused to measured lengths of HDPE pipe. The project offered several unique building methods, like horizontal directional drilling (HDD) to install different sizes of high-density polyethylene (HDPE) Unicoils. ISCO Industries LLC supplied the geothermal materials. served as the general contractor and GeoTility Geothermal Systems was chosen as the main geothermal contractor. A circuit vault that is prefabricated helps save time and money during installation.įor this project, Interface Engineering, of Portland, designed the building, Hoffman Construction Co. A geothermal circuit vault works as the central control point of the geothermal well field where the loops are connected. The pump circulates the liquid through the ground loops, which creates a heat exchange. ![]() The loops are filled with water (or a water-based liquid) and are connected to a heat pump inside the building. In a geothermal system, the source of the energy from the earth is captured by creating a series of horizontal and vertical loops underground. At the same time, the use of this type of energy does not harm the environment and is not reliant on non-renewable fossil fuels. A constant temperature is maintained below the earth’s surface and that energy can be harvested from its natural source to efficiently heat and cool a building. Geothermal systems use a safe, renewable source energy that is stored within the earth. To ensure environmental sustainability and build an efficient and cost-effective system for heating and cooling, the new school’s design included a geothermal system. The 310,000-sq ft building situated on 82 acres along Bell Street is almost double the size of its predecessor, and the campus will accommodate a minimum of 1,600 students and support space for an additional 200. Located less than 30 miles outside of the city, the new school was designed to accommodate a growing high school population. New construction projects are being designed with conservation in mind.Ī new high school in Sandy, Ore., was no exception to the environmentally-friendly attitude builders and engineers around Portland possess. And the suburbs around Portland are no exception. is especially eco-conscious when it comes to urban and regional planning. More wire may be needed than the length provided.By Andrew Farr JanuOne of the greenest cities in the United States, - Portland, Ore.Attach the included ground wire to the water inlet valve and to any solid ground, preferably a steel rod driven into the ground.Caution! This unit should not be used without proper grounding.The pipe should then be immediately installed into the bore.This assures you of a clean bore, and saves undue strain on your drill.Be sure to maintain a constant drill speed when the reverse bore is being made.Take your time it is much better to bore slowly and carefully than hurriedly.Do not use an air impact tool, or an electric impact tool.If they are worn, they should be replaced. Threads on couplings should be checked frequently.It is a good idea to use a drill with a chuck no larger than 3/4.You must at all times, run the tool with water, and use a straight piece of pipe.The pressure must be exerted in a straight forward motion. (We do not guarantee our bits as rock bits, but users are generally getting good results.) Then it will not slip out of alignment and you may exert more pressure. If this does not work, turn the drill on and move very slowly until the bit has made a groove in the rock. With several forward and backward motions you can usually push the rock aside so that the bit will pass without losing it s alignment. If this happens, the drill should be shut off and the water left running. If you hit a rock, the bit will veer off track. When boring through rocky soil, bore with caution.Please oil frequently with a good lubricating oil, on both the inside and outside on the shaft.If you stay on target for the first ten feet, the tool will run straight for the remainder of the bore. In boring a hole, carefully align pipe with the opposite side.
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