green efficient anywhere

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1 SWISS TERM d.o.o. green efficient anywhere Efficient Geothermal Climate-Management Heating and Cooling with geokoax Volume Probes - Also in areas with limited drilling-depths -

2 geokoax for Cooling and Heating The free of charge renewable and innovative energy of the future. Utilization of the natural and constant earth heat (ca C) for an all year round heating and cooling. 2

3 geokoax: Innovations and Benefits Traditional System geokoax Supply Flow Return Flow d bh = 120 to 150 mm d bh 200 mm 3

4 geokoax: Innovations and Benefits > Collecting Surface < Borehole-Resistance Traditional System geokoax Borehole-Resistance 0,09 0,12 W/mK 0,05 0,055 W/mK 30mm Annulus d bh = 120 to 150 mm d bh 200 mm 4

5 geokoax Innovations and Benefits 5

6 geokoax Turbulence Technology Increase of Heat Transfer Coefficient (HTC) Testrun at Univesity RWTH Aachen: HTC with 3m probe with 20 % increase HTC with 10 m probes: 100 % increase possible Permanent shift from laminar to turbulent flows 6

7 geokoax: Technical and Environmental Advantages 1. Technical Advantages: Fast, uniform and more efficient heating or cooling due to: 1. Large collecting surface 2. Minimization of the borehole-resistance 3. Permanent shift from laminar - to turbulent flows 2. Environmental Advantages: 1. Geothermal solutions are also possible in areas with limited drilling permissions (f.x. limitation of drilling depths in Water protection areas) 2. Limited drilling risk (no danger to groundwater, interferring layers of gypsum etc.) 3. Drilling is also possible when land plots are small. 7

8 geokoax Project-Examples 8

geokoax Example Hospital Düren General Conditions Heated area in sqm 7.

9 geokoax Example Hospital Düren General Conditions Heated area in sqm Heat Output in kw: 243 Cooling Performance in kw: 155 Parameter geokoax Traditional System Total Length of Probes in m # Boreholes x Length of Probe 78 x x 53 Volume of Bryne in Liter Approximate Cost in

10 geokoax Example Apartment-building Troisdorf Ground-plan with Drilling-field 10

geokoax Example Apartment-building Troisdorf General Conditions Limitation Drilling Depth in m 24 Heated area in sqm 4.200 Heat Output in kw: 140 Cooling Performance in kw:./.

11 geokoax Example Apartment-building Troisdorf General Conditions Limitation Drilling Depth in m 24 Heated area in sqm Heat Output in kw: 140 Cooling Performance in kw:./. Parameter geokoax Traditional System Total Length of Probes in m # Boreholes x Length of Probe 60 x x 23 Volume of Bryne in Liter Approximate Cost in monovalent bivalent 11

120 11.900 # Boreholes x Length of Probe 89 x 80 149 x 80 Volume of Bryne in Liter 100.000 23.

12 geokoax Example Large Scale Project, The Netherlands General Conditions Limitation in Drilling Depth./. Heated area in sqm Heat Output in kw: 550 Cooling Performance in kw:./. Parameter geokoax Traditional System Total Length of Probes in m # Boreholes x Length of Probe 89 x x 80 Volume of Bryne in Liter Approximate Cost in monovalent bivalent 12

Parameter geokoax Traditional System Total Length of Probes in m 1.260./.

13 geokoax Example Investment, residential area Hattingen General Conditions Drilling Depth in m 30 Heated Area in sqm Units x 145 qm Heat Output in kw: Units x 6 kw Cooling Performance in kw:./. Parameter geokoax Traditional System Total Length of Probes in m /. # Boreholes x Length of Probe 42 x 30./. Volume of Bryne in Liter /. Approximate Cost in /. monovalent./. Gesamt Paket GC-Gruppe - Geokoax GmbH 13

geokoax Example Industrial Building, Salching General Conditions Limitation in Drilling Depth, m 25 Size of Borefield in sqm 900 Heated Area in sqm 2.

14 geokoax Example Industrial Building, Salching General Conditions Limitation in Drilling Depth, m 25 Size of Borefield in sqm 900 Heated Area in sqm Heat Output in kw: 60 Cooling Performance in kw:./. Parameter geokoax Traditional System Total Length of Probes in m # Boreholes x Length of Probe 23 x x 42 Volumen Bryne in Liter Approximate cost in monovalent bivalent 14

protection area (deep drilling prohibited) The very

15 geokoax Example Water Protection Area Chiemsee (Island) Milestone-Project on an island in a water protection area (deep drilling prohibited) The very first house on Fraueninsel (island) without fossil energy 15

16 geokoax Example Railway Switch Heaters Farchant Station (Zugspitze) Trial -Project of German Railway Company DB AG: successfully passed. Since 2014: General Approval by DB AG. 16

17 SWISS TERM d.o.o. green efficient anywhere Gojko Kovačević CEO Swiss Term d.o.o. Surčinsca 5, Ledine, Novi Beograd T M E. Swissterm.bg@gmail.com geokoax GmbH Am Kirchenhölzl Gräfelfing Deutschland

The performance benefits of Coaxial ground heat exchangers vs. Single U bend and Double U bends

Christopher Steins, Dipl.-Ing. Institute of Heat and Mass Transfer, RWTH Aachen University steins@wsa.rwth-aachen.de The performance benefits of Coaxial ground heat exchangers vs. Single U bend and Double