Building Solutions

Automotive

Industry

www.rehau.co.uk

THE ALTERNATIVE TO PROBES AND HORIZONTAL COLLECTOR

RAUGEO Helix Probe PE-Xa

Building Solutions

Automotive

Industry

www.rehau.co.uk

REHAU BUILDING SOLUTIONS

REHAU BUILDING

SOLUTIONS

HOLISTIC APPROACH TO MEET ENERGY EFFICIENCY GOALS

WINDOW AND CURTAIN

WALLING TECHNOLOGY

BUILDING

TECHNOLOGY

CIVIL

ENGINEERING

Building Solutions

Automotive

Industry

www.rehau.co.uk

GROUND-SOURCE ENERGYVARIOUS SYSTEMS TO EXPLOIT GROUND-SOURCE ENERGY

Energy Piles Horizontal CollectorProbes

Building Solutions

Automotive

Industry

www.rehau.co.uk

RAUGEO Helix-Sonde PE-Xa

Example: Evaporater output of 8.25 kW

0.7m3m3m6mLaying distance

500m

pipe

21

Helix probes

15

Helix probes

2 probes

at 90mRequirement

415 m²189 m²135 m²72 m²Space

requirement*

20.6

Helix probes

400 W / probe

Helix-

probe (2)

330 m²15

Helix probes

165 probe

metres

Calculated pipe

requirement

25 W/m²550 W /

probe50 W/m

Extracted

output

Horizontal

collectors

Helix-

probe (1)Probes

* 1.5m distance from the building required

COMPARISON OF SPACE REQUIREMENTS

Building Solutions

Automotive

Industry

www.rehau.co.uk

RAUGEO Helix probe PE-XaCOMPARISON OF SPACE REQUIREMENTS

Surface area requirement for 2 probes:

12x6 = 72 m²

3

6 3

1,5

Surface area requirement for 15 Helix:

15x9 = 135 m²

12

6

9

15Surface area requirement for 500m collector:

17,5 x 22,5 = 415 m²

22,5

17,5

0,71,5

0,7

Building Solutions

Automotive

Industry

www.rehau.co.uk

- Designed for new build (particularly low-energy houses)

but also for refurbishments

- Optimal for projects with limited space and where a

standard probe installation is not feasible

- 5m deep borehole with a spiral drill, in which the Helix

probe can be installed and backfilled

- Less approvals required and lower installation costs for

contractors and clients

- Extracted outputs up to 700 W/Helix probe, on average

400 W/Helix

RAUGEO Helix Probe PE-XaTHE ALTERNATIVE TO PROBES AND HORIZONTAL COLLECTORS

Building Solutions

Automotive

Industry

www.rehau.co.uk

Helix Probe Data:

RAUGEO Helix Probe PE-XaTECHNICAL DATA

13 LitresVolume (for water / antifreeze)

7.5 kgWeight

PE-XaPipe material

25 x 2.3Pipe size

40 mPipe length

approx. 38 cmOuter diameter

approx. 3.0 mSpiral height (for installation)

approx. 1.1 mSpiral height (for transport)

Building Solutions

Automotive

Industry

www.rehau.co.uk

Telescopic concept:

- Extendable from 1.1m (transport) to 3m (for installation)

- With that, low transportation and storage costs

- Low installation costs

- Defined pipe spacing in the spiral and a fixed probe diameter

of 38cm due to attached permeable PE membrane

RAUGEO Helix Probe PE-XaSIMPLY UNIQUE – UNIQUELY SIMPLE

Building Solutions

Automotive

Industry

www.rehau.co.uk

High performance material PE-Xa

- Complete system made of PE-Xa for flow and return

� No connections on probe tip

- High resistance against mechanical damage, ensuring

maximum reliability during transport, installation and in

operation:

- No reduction in pipe lifespan even when notches /

grooves travel 20% into pipe wall

- Resitant to stress crack formations (puncture loads)

- Temperature resistance to +95°C, which allows (also

retrospective) combination with solar thermal systems for

ground regeneration and better thermal efficiency

RAUGEO Helix Probe PE-XaSIMPLY UNIQUE – UNIQUELY SIMPLE

Building Solutions

Automotive

Industry

www.rehau.co.uk

Sizing:

- Fundamentals:

- Heat load of building

- Heat pump type (COP)

>> Necessary evaporator loads

- Influencing factors:

- Soil type

- Groundwater levels

- Operating hours

RAUGEO Helix Probe PE-XaSYSTEM DESIGN

Building Solutions

Automotive

Industry

www.rehau.co.uk

Estimated outputs:

Helix probe performance based on 1800h operation for different soil / grounwater conditions

Orientation value: Ø 400 W/ Helix probe

RAUGEO Helix Probe PE-XaESTIMATED OUTPUTS PER PROBE

450 – 700 WSandy clay (wet)

300 – 400 WSandy clay (dry)

250 – 350 WClay (dry)

400 – 650 WSilt (wet)

250 – 350 WSilt (dry)

400 – 700 WSand (wet)

200 – 300 WSand (dry)

Specific heat extraction in W / Helix probeSoil type

Building Solutions

Automotive

Industry

www.rehau.co.uk

RAUGEO Helix probe PE-XaINSTALLATION PROCESS

1. Drilling

- Min. diameter of borehole: 400 mm- Laying depth ca. 4-5m from ground level(drilling ca. 3m)

- Carried out with a JCB digger (ca. 8-16t), on which a spiral drill bit is attached

- If required, use borehole casing

2. Preparation of Helix probe

- Extend probes to installation length of ca. 3 m

- Fix in extended position e.g. with a timber batten

(as an installation aid)

Building Solutions

Automotive

Industry

www.rehau.co.uk

RAUGEO Helix probe PE-XaINSTALLATION PROCESS

3. Insertion of Helix probe

- Insert the completely extended Helix probe, withinsertion aid, into the borehole

- Securing Helix probe in the borehole, e.g. withsand at base of borehole

4. Backfilling of borehole

- Backfill by hand, so that no voids exist between thepipe and the borehole wall

- Due to the properties PE-Xa, it is possible to use theexcavated material as a backfill, although it isrecommended to mix with sand

- After successful insertion of the probe, it must be flow-and pressure tested

Building Solutions

Automotive

Industry

www.rehau.co.uk

RAUGEO Helix Probe PE-XaINSTALLATION

Pipe connections:

- Connection options:- Parallel to manifold- Up to 3 Helix probes in series

- Connection of PE-Xa pipes possible with:- Compression sleeve and protective tape- Electrofusion joints

- Connect to manifold at highest point

- Pressure test at end of installation

Building Solutions

Automotive

Industry

www.rehau.co.uk

RAUGEO Helix Probe PE-XaTEST FIELD

Building Solutions

Automotive

Industry

www.rehau.co.uk

RAUGEO Helix Probe PE-XaTEST FIELD

14

16

18

20

22

24

26

28

30

32

14:1

1

15:1

116

:11

17:1

118

:11

19:1

120

:11

21:1

122

:11

23:1

100

:11

01:1

102

:11

03:1

1

04:1

105

:11

06:1

1

07:1

108

:11

09:1

1

10:1

111

:11

12:1

113

:11

14:1

1

Time

Tem

pera

tur

[°C

]

Vorlauf

Rücklauf

Erdreich 1,6m

Erdreich 2,8m

Erdreich 4,0m

Erdreich 5,2m

Time

Flow

Return

Ground 1.6 m

Ground 2.8 m

Ground 4.0 m

Ground 5.2 m

Building Solutions

Automotive

Industry

www.rehau.co.uk

RAUGEO Helix Probe PE-XaTEST FIELD

Leistungsvergleich über 24 Stunden

-300

-200

-100

0

100

200

300

400

500

600

10:00 12:00 14:00 16:00 18:00 20:00 22:00 00:00 02:00 04:00 06:00 08:00 10:00

Uhrzeit

Wärm

estr

om

[W

]

Kollektor 5 Kollektor 2 Kollektor 3 Kollektor 1

Performance Comparison 24 h

Ene

rgy Transfer [W

]

Time