nouvelle mthode de placement MSc Jacques VERCRUYSSE GEO-GREEN - - PowerPoint PPT Presentation

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nouvelle mthode de placement MSc Jacques VERCRUYSSE GEO-GREEN - - PowerPoint PPT Presentation

Mar 25, 2024 285 likes •524 views

Cheap and efficient application of reliable Ground Source Heat exchangers and Pumps Training Workshop Nouveau type de sondes gothermiques et nouvelle mthode de placement MSc Jacques VERCRUYSSE GEO-GREEN sprl-bvba Cheap-GSHPs (Cheap and

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SLIDE 1

Training Workshop

Nouveau type de sondes géothermiques et nouvelle méthode de placement

Cheap and efficient application of reliable Ground Source Heat exchangers and Pumps MSc Jacques VERCRUYSSE GEO-GREEN sprl-bvba

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SLIDE 2

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

1. New BHE devopped :

  • Helix BHE:
  • State of art
  • New developments: probes and machines
  • Case study
  • Areas of application
  • Coax BHE:
  • State of art
  • New developments: probes and machines
  • Case study
  • Advantages and disadvantages
  • Prospects for the future
  • 2. Case study: Ecohouse in Putte
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SLIDE 3

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

State of art

 BSHE IN HDPE WITH DIAM = 500 mm  METHOD OF INSTALLATION TO DEPTH = 3-5 m  EXTRACTION POTENTIAL = 40 – 80 W/m  AMBITIOUS APPLICATION :

  • buildings class A - A+ with low

requirements

  • Stable soils
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SLIDE 4

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE é

New developments

 CONCEPT:

  • Reduce the diameter allowing to reach greater depths with the 'Dry

Auger' method

 BHE DEVELOPMENTS:

  • Al/PEX continuous tube
  • Diameter = 300-340 mm
  • Pitch = 600-650 mm
  • Total length = 25 m
  • Prototypes tested at Molinella (Italy, near Bologna)
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SLIDE 5

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

New developments

 CONCEPT:

  • Reduce the diameter allowing to reach greater depths with the 'Dry

Auger' method

 DEVELOPMENTS OF THE DRILLING MACHINE AND COMPONENTS :

  • High torque rotary head machine
  • Dry Auger with outside diameter = 400 mm and inside diameter =

350 mm

  • Point to lose
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SLIDE 6

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

Case studies

PIKERMI (Greece) ERLANGEN (Deutchland) VALENCIA (Spain) Borehole resistance 0.108 (mK)/W 0.18 (mK)/W 0.222 (mK)/W Power

  • utput /m

70 W/m 62 – 88 W/m 80 W/m

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SLIDE 7

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

 CAN BE REACHED IN DEPTHS OF 8-14 METRES:

  • In loose soils
  • The maximum depth depends on the type of soil

 INSTALLATION TAKES ABOUT A DAY  HIGH YIELD PER METER:

  • Up to 88 W/m
  • 500 - 1200 W per heat exchanger

 AREAS OF APPLICATION:

  • Buildings with low energy requirements
  • Unconsolidated soils (sand, clay even if not stable)
  • Depth limited by authorities (drinking water aquifers close to

the surface)

  • Insufficient surface area for traditional solutions with

horizontal systems

Results

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SLIDE 8

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

State of art

 At the beginning in 2006:

  • Coaxial probe diameter = 50 mm SS304-SS304L
  • Depth up to 20 m
  • Penetrometer
  • Automatic TIG welding
  • Patents Tecnopenta srl (Soc. Soc. Socia RED srl)
  • Four installations performed

 CONFRONT WITH BHE Dubble U (Vigonza-Italy):

  • Extraction of thermal energy in transient mode +30%
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SLIDE 9

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

State of art

 EVOLUTION in 2008 :

  • Coaxial probe diameter = 50 mm SS304-SS316
  • Used Hydra Vibrasond 500 Machine
  • Depth = 50-100 m
  • Automatic TIG welding
  • Patent Hydra-Tecnopenta srl (RED srl)
  • Various installations and drilling machines
  • Installation with cathodic protection in Piazza San

Marco (Venice)

 in 2011 :

  • Coaxial probe diameter = 50 mm SS304
  • Hydra Vibrasond Machine
  • Award of Innovation :
  • 2012 Mons (Belgium)
  • 2014 Batibouw (Belgium)
  • Meters of probes installed to date : > 30.000 m
  • In soft soils and rocks
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SLIDE 10

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

New development of probe

 STUDIED PROBE :

  • Diameters 60-70mm
  • Insulated inner tube
  • Helical inner tube
  • Conductive fluid injection

ENERGY YIELD SIMULATIONS :

  • Up to +13%
  • Not relevant
  • +4%
  • Wide potential but different problems

 TEST ON A MOLINELLA SITE (near Bologna, Italy) :

  • Field installation with all types of probes
  • TRT on all types of probes
  • In the long term, the soil characteristics and the diameter of the

probe are decisive

  • Borehole resistance (RB) lower for metal probes
  • Metal probes are more reactive in transient mode
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SLIDE 11

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

New developments in machines and methods

 EVOLUTION METHODS:

  • New head of insertion
  • Rotation
  • High pressure water injection
  • Vibration
  • Drilling tip
  • Trilame-Tricone
  • With non-return valve
  • Pipes connection
  • Welded
  • Screwed

 TEST ON MOLINELLA SITE (near Bologna, Italy):

  • BHE of 100 m installed in 3 hours !

 PATENT APPLICATION FILED IN ITALY IN DECEMBER 2018

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Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

Bioclimatic office building of CRES (Greece)

BHE

Depth m Main geology Water depth m Thermal conductivity, W/mK Thermal resistance, mK/W

Helix

15 clay 15 4.129

0.115

Coax

50 clay 8 2.643

0.050

Single U

119 clay, sand 8 3.196

0.130

Dubble U

121 clay, sand 8 2.965

0.073

Coax

Lower borehole resistance

Lower RB Compared to a double U probe, coaxial probes show a yield of more than 30%

(80-100 W/m compared to 50 W/m) during the

  • perating phase
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SLIDE 13

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

Ecohouse in Belgium (1/3)

BHE of 78 m :

  • 2 dubbel U
  • 2 coax diam 50 mm (48,6 mm)
  • 2 coax diam 76 mm (one with

isolated inner pipe) On all borehole heat exchangers thermal energy meters have been installed to evaluate their performance in normal operating conditions of the heat pump

Feasability of the piling method in the hard clay layers has been demonstrated: a rate of

penetration of 2 meters per minute was reached.

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SLIDE 14

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

Ecohouse in Belgium(2/3)

Lower Rb Compared to the double U, coaxial probes achieve a yield

  • f 10-20% in addition

under normal

  • perating conditions

BHE Borehole resistance (K/Wm) Conductivity (W/mK) Coax 76 mm w/insulated

0,036 2,06

Coax 76 mm w/o insulated

0,061 2,27

Double U

0,076 2,16

Coax 50 mm

0,048 2,31

  • 0,005

0,005 0,01 0,015 0,02 0,025 0,03

Confrontation W/m

W/m doppia U W/m coax REHAU W/m coax 50 1 W/m coax large PE

New Coax Old coax

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SLIDE 15

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

Ecohouse in Belgium(3/3)

Monitoring BHE of 78 m : data to 24/04/2019 Heat extraction power in W/m (on total time !)

  • 2 dubbel U : +/- 6 W/m
  • coax diam 50 mm : +/- 6-7 W/m
  • coax diam 76 mm : +/- 9 W/m

In transient flow ! => short cycle of HP (> 30 min)

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Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

ADVANTAGES

 Less invasive  No need of casing  High thermal conductivity

  • Low Rb
  • Metal outer tube
  • Direct contact with the ground

 Energy extraction up to +30% compared to Double U in transient mode  Faster installation in soils that need casing  Lower expansion of the inox => STORAGE of energy

Type Diam borehole (mm) Rb °K/(W/m) Expansion (mm/m/°) Yield Double U (PE) 125 – 160 0,08 – 0,12 0,020 standard Double U (PE-Xa) 125 - 160 0,08 – 0,12 0,015 standard Coax PE 100 0,06 – 0,12 0,020 + 5% Coax Inox 0 - 90 0,03 – 0,06 0,0015 + 5 à 30 %

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SLIDE 17

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

ADVANTAGES

 Oblique BHE

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SLIDE 18

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

ADVANTAGES

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SLIDE 19

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

ADVANTAGES

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SLIDE 20

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

ADVANTAGES

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SLIDE 21

Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

DISADVANTAGES

 Probe in inox

  • Risk of corrosion (cathodic protection)
  • Costs (Minimize thickness, economies of scale)

 Seal well tip and junctions

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Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE

Prospects for the future

 COST REDUCTION OF UP TO 30% IN LOOSE SOILS THAT REQUIRE CASING  IMPROVEMENTS IN SEALING IN PROGRESS  SEARCH FOR NEW MATERIALS  FIELD TEST WITH INTERNAL HELICAL TUBE  GEO4CIVHIC RESEARCH PROJECT

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Cheap-GSHPs (Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps)

Thanks for your attention

MSc Jacques VERCRUYSSE GEO-GREEN sprl

http://cheap-gshp.eu/

Training workshop BRUSSELS – BE 26 april 2019 Jacques VERCRUYSSE