THE INNOVATIVE PATH TO GEOTHERMAL ENERGY RAUGEO Deep Ground-Source Probe

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1 THE INNOVATIVE PATH TO GEOTHERMAL ENERGY RAUGEO Deep Ground-Source Probe Bau Automotive Industrie

2 RAUGEO DEEP GROUND-SOURCE PROBE Advantages of deep drilling Reduce of operating costs and shortening the amortization period through increased efficiency e.g. simulation Haus Gisel 2x 450m or 9x150m probes Potential waiver of a heat pump in areas with thermal anomalies, when the return temperature is sufficient for heating the building Increase of temperature: ca. 3K pro 100m Tiefe REHAU - PCDxxx Seite 2

3 RAUGEO DEEP GROUND-SOURCE PROBE Advantages of deep drilling Increasing the efficiency of the complete system by increasing the COP of the heat pump 7 Leistungszahl ε (COP) T = 35 C T = 45 C T = 55 C Wasser- bzw. Soletemperatur in C REHAU - PCDxxx Seite 3

4 RAUGEO DEEP GROUND-SOURCE PROBE Advantages of deep drilling Small footprint, interesting especially for innercity areas and objects with a large heating load REHAU - PCDxxx Seite 4

5 RAUGEO DEEP GROUND-SOURCE PROBE Technical requirements of depth exploitation Today s ground-source probe types PN 16 are nominally pressure resistant by their own capacity up to an installation depth of approx. 130 m. Beyond this depth, the grouting material and, respectively, the water in the bore hole equalize the pressure. This cannot be ensured with increasing depth or in the presence of fissured rock. This is confirmed by current research projects as well as damages occured in depths between 250 and 300 m. Consequently, depth probes have to be able to withstand the hydrostatic pressure and the operating pressure by their own capacity, regardless of the grouting. e.g. in a depth of 800 m, a hydrostatic pressure of 80 bar and an operating pressure of 3 bar. REHAU - PCDxxx Seite 5

6 RAUGEO DEEP GROUND-SOURCE PROBE Technical requirements of depth exploitation Geothermal probes for greater depths, especially in geothermal anomalies are required to have a high temperature resistance. REHAU - PCDxxx Seite 6

7 RAUGEO DEEP GROUND-SOURCE PROBE Technical solution of the depth exploitation 3-layer pipe structure The inner pipes consists of high-pressure crosslinked and therefore temperature- and stress cracking resistant PE-Xa. In order to withstand the inside pressure, this inner pipe is provided with a reinforcement made of of V4A stainless steel wire In order to protect this reinforcement, the probe pipe is provided with an outer layer made of impact resistant polyethylene PE 100. REHAU - PCDxxx Seite 7

8 RAUGEO DEEP GROUND-SOURCE PROBE Technical solution of the depth exploitation The probe tip as well as all connecting elements are made of corrosion-resistant V4A stainless steel. Compression, welding and pressure test of all joints are carried out in the factory REHAU - PCDxxx Seite 8

9 PILOT PROJEKT - DOUBLE U-BEND 300 m IN ZURICH, AUGUST 2009 Lowering a double-u-probe 40 x 3.7 Length 300 m for energy-efficient renovation of a multi-family dwelling in Zurich with limited installation space for ground-source probes. REHAU - PCDxxx Seite 9

10 PILOT PROJEKT - DOUBLE U-BEND 300 m in Zürich, August 2009 Lowering the probe REHAU - PCDxxx Seite 10

11 PILOT PROJECT KOAXIAL PROBE 450 m IN ZUMIKON (CH), DECEMBER 2012 Installation of 2 koaxial-probes, diameter 90 mm each 450 m for energetic renovation of the historic building House Gisel in collaboration with ETH Zurich. REHAU - PCDxxx Seite 11

12 PILOT PROJECT KOAXIAL PROBE 450 m IN ZUMIKON Preparing and filling the probe REHAU - PCDxxx Seite 12

13 PILOT PROJECT KOAXIAL PROBE 450 m IN ZUMIKON Lowering the probe Experimental use of backfill-hoses vs. backfill-pipe for optimal utilization of the drill diameter REHAU - PCDxxx Seite 13

14 PILOT PROJECT KOAXIAL PROBE 450 m IN ZUMIKON Installation Time 10 m/min. REHAU - PCDxxx Seite 14

15 PILOT PROJECT KOAXIAL PROBE 450 m IN ZUMIKON Installation of partly insulated return pipe and installation of the probe head REHAU - PCDxxx Seite 15

16 BV MUSIKHAUS JECKELIN, RÄMISSTRASSE 42, ZURICH Deepest geothermal probe Zurich, March 2013 Energy renovation of an urban building with 3 deep-probes 450 m and one probe-probe 550 m REHAU - PCDxxx Seite 16

17 BV MUSIKHAUS JECKELIN, RÄMISSTRASSE 42, ZURICH 1x 550 m, 3x 450 m 324 m REHAU - PCDxxx Seite 17

18 SERIES APPLICATION Since 2013 successful installations of 9 further deep ground-source probes in the depth range from 350 m to 550 m (CH, HU) REHAU - PCDxxx Seite 18

19 RAUGEO HPR > 800 m Project Landau using a disused borehole with a coaxial probe 800 m for the direct heating of a car dealership without heat pump Burj Khalifa 830 m Project Lausanne 2015 double U probe HPR 50 depth 820 m 820 m REHAU - PCDxxx Seite 19