search.noResults

search.searching

dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
PEX | MATERIALS


PEX pipe was recently used to refurbish an entire district heating system in the UK – and also played a major role in making an entire community in the USA carbon neutral


Taking the heat: PEX pipe in construction


Cross-linked polyethylene (PEX) pipe is gaining in popularity as installers realise it is easier to install than traditional steel piping systems – and can help sustainability. For instance, PEX pipe is playing a part in making an entire 7,200-home community in Texas carbon neutral. Taurus, the developer of Whisper Valley in Austin,


Texas decided that the entire 2,000-acre community would be ‘Net-Zero Ready’. All structures will be ground source geothermal and solar equipped to meet the carbon neutral standard adopted by the city’s Municipal Building Code. The US$2 billion development also includes apartments, commercial space, schools and other buildings. The developer says it will be the largest zero-energy capable housing community in the USA. A key component in achieving this is the geothermal – or geoexchange – cooling and heating system, and its underground distribution piping system. Each of the 237 homes in Phase I of the project is equipped with a Rehau Raugeo PEX-a double U-bend pipe loop and a ground source heat pump. More than 95,000m of the pipe was used. All builders in Whisper Valley must hook up to EcoSmart’s GeoGrid, a five-mile loop of under-


www.pipeandprofile.com


ground distribution piping that links each home to a geoexchange network, engineered by B2E Consulting Engineers. The system is predicted to reduce heating/cooling energy costs for homeown- ers by up to 65%, compared with conventional air-source heat pumps. “This is a great example of the use of plastic tubing for geo-exchange loops, and all the benefits that ground source systems deliver,” said Lance MacNevin, director of engineering for the building and construction division of the Plastics Pipe Institute (PPI). “The PEX piping is tough and durable and will provide decades of reliable service.” He added that the Rehau double U-bends


increase the output of each borehole by up to 30% compared to single U-bends. This reduced the required depth of each borehole, as well as the overall number of boreholes.


“It also cut drilling costs and the number of days spent drilling on the Whisper Valley jobsite,” he added. The project was named the 2019 PPI project of


the pear in the building and construction division. The design incorporates boreholes around 100m deep, into which the Rehau pipe loops were inserted. Boreholes were grouted after pipe insertion. As with all geothermal systems, fluid


November/December 2019 | PIPE & PROFILE EXTRUSION 29


Main image: The Whisper Valley project uses PEX pipe within a


geothermal heating and cooling system


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58