RAUGEO HelixProbe PE-Xa - Renewable Heatgshp.org.uk/documents/REsearchseminar2010/Ralf... · RAUGEO...
Transcript of RAUGEO HelixProbe PE-Xa - Renewable Heatgshp.org.uk/documents/REsearchseminar2010/Ralf... · RAUGEO...
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THE ALTERNATIVE TO PROBES AND HORIZONTAL COLLECTOR
RAUGEO Helix Probe PE-Xa
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REHAU BUILDING SOLUTIONS
REHAU BUILDING
SOLUTIONS
HOLISTIC APPROACH TO MEET ENERGY EFFICIENCY GOALS
WINDOW AND CURTAIN
WALLING TECHNOLOGY
BUILDING
TECHNOLOGY
CIVIL
ENGINEERING
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GROUND-SOURCE ENERGYVARIOUS SYSTEMS TO EXPLOIT GROUND-SOURCE ENERGY
Energy Piles Horizontal CollectorProbes
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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
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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
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- 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
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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)
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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
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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
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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
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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
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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)
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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
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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
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RAUGEO Helix Probe PE-XaTEST FIELD
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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
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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