|
Savings using the GeoClip™
The following information presents the material
and drilling cost breakdown for three types of geothermal
installations:
- Standard u-bend using standard
20% bentonite grout
- Standard u-bend using thermally
enhanced bentonite grout
- GeoClip™ u-bend using a standard
20% bentonite grout
Vertical Heat Exchanger Material Costs
The table below shows the cost per linear
foot of bore for each material that can be used in a vertical
heat exchanger using a 3/4" u-bend pipe.
|
Material Cost Per Linear
Foot of Bore
|
|
Material
|
Material Cost
|
4.5" Bore
|
5" Bore
|
6" Bore
|
|
3/4" U-bend Pipe
(Pre-manufactured)
|
$0.19 per ft
|
$0.38
|
$0.38
|
$0.38
|
|
Propylene Glycol (20% Antifreeze
Solution)
|
$10.00 per gal
|
$0.12
|
$0.12
|
$0.12
|
|
Bentonite Grout
(20% Solids)
|
$6.00 per 27 gal
|
$0.16
|
$0.21
|
$0.30
|
|
T.C. Enhanced Grout
(K=.85 btu/hr-ft-F)
|
$25.00 per 30 gal
|
$0.61
|
$0.78
|
$1.15
|
|
GeoClips™
(Spaced @ 10' Intervals)
|
$2.50 per clip
|
$0.25
|
$0.25
|
$0.25
|
The table below shows the combined material
costs for a standard, thermally enhanced grout, and GeoClip™
installation per linear foot of bore.
|
Total material cost per linear foot
of bore
|
|
Installation Type
|
Material Required
|
4.5" Bore
|
5" Bore
|
6" Bore
|
|
Standard
|
Pipe, Antifreeze, Bentonite Grout
|
$0.66
|
$0.71
|
$0.80
|
|
T.C. Enhanced Grout
|
Pipe, Antifreeze, T.C. Enhanced Grout
|
$1.11
|
$1.28
|
$1.65
|
|
GeoClip™
|
Pipe, Antifreeze, Bentonite Grout, GeoClips
|
$0.91
|
$0.96
|
$1.05
|
| GeoClip™ & T.C. Grout |
Pipe, Antifreeze, T.C. Enhanced Grout,
GeoClips |
$1.36
|
$1.53
|
$1.90
|
Combined drilling and materials
cost
The table below shows the total
material and drilling cost per linear foot of bore.
|
Drilling costs per foot
|
|
Installation Type
|
Bore Dia.
|
$2
|
$3
|
$4
|
$5
|
$6
|
$7
|
$8
|
$9
|
|
Standard
|
4.5"
5"
6"
|
$2.66
$2.71
$2.80
|
$3.66
$3.71
$3.80
|
$4.66
$4.71
$4.80
|
$5.66
$5.71
$5.80
|
$6.66
$6.71
$6.80
|
$7.66
$7.71
$7.80
|
$8.66
$8.71
$8.80
|
$9.66
$9.71
$9.80
|
|
T.C. Enhanced Grout
|
4.5"
5"
6"
|
$3.11
$3.28
$3.65
|
$4.11
$4.28
$4.65
|
$5.11
$5.28
$5.65
|
$6.11
$6.28
$6.65
|
$7.11
$7.28
$7.65
|
$8.11
$8.28
$8.65
|
$9.11
$9.28
$9.65
|
$10.11
$10.28
$10.65
|
|
GeoClip™
|
4.5"
5"
6"
|
$2.91
$2.96
$3.05
|
$3.91
$3.96
$4.05
|
$4.91
$4.96
$5.05
|
$5.91
$5.96
$6.05
|
$6.91
$6.96
$7.05
|
$7.91
$7.96
$8.05
|
$8.91
$8.96
$9.05
|
$9.91
$9.96
$10.05
|
|
GeoClip™ & T.C. Grout
|
4.5"
5"
6"
|
$3.36
$3.53
$3.90
|
$4.36
$4.53
$4.90
|
$5.36
$5.53
$5.90
|
$6.36
$6.53
$6.90
|
$7.36
$7.53
$7.90
|
$8.36
$8.53
$8.90
|
$9.36
$9.53
$9.90
|
$10.36
$10.53
$10.90
|
Savings using the GeoClip™
Example: Cost of a single
vertical heat exchanger bore
Situation: 3/4" u-bend, 20%
glycol, 5" bore, $5 per ft. drilling cost
|
Installation Type
|
Bore Design Lengths (Ft)
|
Percent Reduced
|
Vertical Heat Exchanger Cost
|
Percent Savings
|
| Standard |
200
|
0.00%
|
$1,142.00 |
0
% |
| T.C. Enhanced Grout |
160 |
20.00% |
$1,004.40
|
12% |
| GeoClip™
|
160 |
20.00% |
$953.60 |
16.5% |
| GeoClip™ & T.C.
Enhanced Grout |
140 |
30.00% |
$914.20 |
20% |
GeoClip™ reduces vertical
heat exchange bore cost by 24 percent!
As shown in the table above,
using the GeoClip™ will reduce the required vertical
heat exchanger lengths which can significantly lower your
geothermal loopfield installation costs.
|
