Garrett Office Buildings Edmond, Oklahoma · Short header location 3/4” PE bore 2” PE Zone...
Transcript of Garrett Office Buildings Edmond, Oklahoma · Short header location 3/4” PE bore 2” PE Zone...
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Garrett Office BuildingsEdmond, Oklahoma
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Geothermal Building20,000 Sq. Ft.
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VAV Building15,000 Sq. Ft.
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Floor 2Conference
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Floor 2 Private Office
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Floor 2 Open Office Space
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Typical Heat Pump
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Geothermal BuildingFloor 2 Heat Pump Supply Ducts
141512x16
12x20
8
9 10
11
12
13
16
12x16 10” Typical ofAll BranchDuctsAll Heat Pumps
12x16
12x20
12x20
12x16
12x16
12x20
12x14
12x10
15x20
12x10
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Loop Field Overview
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Geothermal BuildingLoop Field Site Plan
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LoopField
Details
Short headerlocation
2” PE Zone Supply Header - Return Similar3/4” PE borepiping back toheader
Notes:- 40 bores on 20 foot centers each with 3/4” PE pipe- Short header manifold in center of each loop zone of 10 bores- Each bore must have the same overall pipe length for balanced flow
(Coil excess piping in the header trench)
- Loop zone supply and returns done in same fashion- Bores must be grouted when completed
Typical bore
250 ft deep
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GeothermalMechanical
Room
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GeothermalMechanical
Room
2” PE typical
Heat Pump
Supply
Heat PumpReturn
Expansion
Air
Separator
CWS
Bypass
Pressure Reducer/Relief
Backflow Preventor
3/4”Air Vent
3” Copper
2” PE typical
125 GPM @ 70’
Pumps
Primary/Standby
Ground LoopSupply
Ground Loop
Return
Charging
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Floor 1 Heat Pump Piping
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Garrett Office BuildingsHighway View
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Geothermal BuildingRoof View
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VAV BuildingRoof View
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VAV BuildingCentral Air Handler
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VAV BuildingAir-Cooled Condensing Unit
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VAV BuildingBoiler Room
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1.50
2.00
2.50
$p
er
Sq
uare
Fo
ot
Garrett Buildings
Annual Energy and HVAC Maintenance Costs 2006-2007
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0.50
1.00
$p
er
Sq
uare
Fo
ot
VAV System Geothermal
Total Electricity Gas Maintenance
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50
60
70
80
90
kB
tup
er
Sq
uare
Fo
ot
Garrett Buildings
Annual Energy Use 2006-2007
-
10
20
30
40
50
kB
tup
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Sq
uare
Fo
ot
VAV System Geothermal
Total Electricity Gas
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40
45
50
Eq
uiv
ale
nt
per
Sq
uare
Fo
ot
Garrett Buildings
Annual CO2 Emissions 2006-2007
20
25
30
35
Lb
s.C
O2
Eq
uiv
ale
nt
per
Sq
uare
Fo
ot
VAV System Geothermal
Electricity Gas
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Garrett Buildings
Monthly Energy Use
4
5
6
7
8
9
10
kB
tup
er
Sq
ua
reF
oo
t
0
1
2
3
4
Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07
kB
tup
er
Sq
ua
reF
oo
t
VAV System Geothermal
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Garrett Buildings
Monthly Peak Demand
4.0
4.5
5.0
5.5
6.0
Watt
sp
er
Sq
uare
Fo
ot
2.0
2.5
3.0
3.5
Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07
Watt
sp
er
Sq
uare
Fo
ot
VAV System Geothermal
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Garrett Buildings
Monthly Electricity Supply Load Factor
40
50
60
70
Lo
ad
Facto
r
20
30
Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07
VAV System Geothermal
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Garrett Office BuildingsInstallation Costs
• Geothermal System circa 1998– Complete exterior loop, mechanical room,
interior PE piping, flushing and unit startup,heat pumps, duct work, exhausts, MUAsystem, timeclock-based controlssystem, timeclock-based controls
– $128,700 ($2,574 per ton)
• VAV System circa 1987– air-cooled condenser, VAV air handler,
boiler, VAV boxes with reheat coils,economizer, electronic controls
– $100,000 ($2000 per ton)
– costs per building owner do not includestructural or architectural