GeoExchange Geothermal Energy Ground Source Heat Pumps

1
GeoExchangeGeothermal Energy Ground Source Heat
Pumps

• By Steve Best
• 2008

2
How it works
Applications

• The Advantages of GeoExchange
• Reduces Energy Costs
• Reduces Maintenance Costs
• Best Life cycle Costs
• Removes Fossil Fuel Need Emissions
• Most Versatile For All Heating Cooling
  Applications including Radiant and Pool
• Safer Environment with No Fossil Fuel Needs
• Forced Air and Hydronic Hybrids Systems
• Recycle BTUs From Cooling To Heating Loads
• Most Compatible W/ Photovoltaic with HVAC
  Systems On or Off Grid
• Becomes an Onsite Utility Infrastructure

Types of Loops
Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
3
How it works
How it works
Applications
Types of Loops

• Geothermal systems (also known as GeoExchange
  or ground source heat pumps) use the natural
  temperature of the earth to provide heating and
  cooing and hot water of homes and businesses at a
  lower cost.
• Ground Loop Heat Exchanger is made of HDPE
  Piping installed in bore holes or trenches filled
  with water.
• The water circulating through the piping in the
  earth becomes a conveyer of BTUs to and/or from
  the building of heating of cooling needs.

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
How it works continued gtgtgt
4
How it works
How it works continued
Applications
Types of Loops

• In winter, the water solution circulating through
  piping buried in the ground absorbs heat from the
  earth and carries it into the home. The heat pump
  in the building extracts heat from the water and
  then discharges the heat into the air or water
  per load demands.
• In summer, the process is reversed. To cool the
  building, heat is extracted from the air, then
  via the heat pump the BTUs are discharged to the
  water circulating through ground loop where it is
  cooled by the earth.

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
5
How it works
Types of Loops
Applications
Types of Loops

• Vertical
• Horizontal
• Mat Loop
• Slinky
• Pond
• Hybrids Open
• Radiant Floors

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
6
How it works
Vertical
Applications
Types of Loops

• Advantages
• Stable Temperature in Ground
• Good Thermal Conductivity
• Small Footprint
• Most effect for Cooling Loads
• Most Likely to have High Moisture Levels
• Most dependable
• Disadvantages
• Highest first cost
• Permitting required
• Drilling Spoils and Waste Handling

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
7
How it works
Horizontal
Applications
Types of Loops

• Advantages
• Lower Cost
• No drilling permits required
• No on containments such as bentonite to be
  contained.
• Easily installed on new sites
• Heating Load Dominant Applications
• Disadvantages
• May not be suitable w/ Cooling Load applications
• Requires substantial land area (approx. 2000ft
  per ton
• Good Moisture content of soil is key factor
• Excavation can be disruptive to existing
  landscaping

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
8
How it works
Mat Loop
Applications

• Advantages
• Lower Cost Similar to Trenched Loops
• No drilling and waste control issues
• Large Projects Easily Served
• Easily installed on new sites
• OK for Heating Cooling Loads with consideration
  to good moisture levels
• Disadvantages
• May not be suitable w/ Cooling Load applications
  in Dry Soils
• Requires substantial land area (approx. 1000ft
  per ton
• Flushing Purging is more complex
• Soil Types can be limiting e.i. Clay, Dry Sandy
  Soils, Gravels and Cobble Soils

Types of Loops
Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
9
How it works
Slinky
Applications

• Advantages
• Similar to Horizontal Trench
• Shorter Trench Lengths
• Can be installed Flat or Vertically
• Can be install with trenching equipment
• Suitable for single home projects
• Disadvantages
• May not be suitable w/ Cooling Load applications
• Shorter trenches More Pipe Labor
• Good Moisture content of soil is key factor
• Difficult to Flush Purge
• Can be easily installed or back filled improperly

Types of Loops
Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
10
How it works
Pond
Applications
Types of Loops

• Stainless Steal Plates provide good thermal
  transference and easy installation
• Tubing Coils are traditional applications
• Good thermal transference
• Good for commercial and manufacturing loads
• Requires 1 acre plus water surface for average
  home.
• 10ft-15ft water depth
• Needs to have stable annual water levels

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
11
How it works
Hybrids Open Loops
Applications
Types of Loops

• Combinations of different loop Types
• Addition of Boiler and/or Cooling Tower can be
  used to offset peak loads needs to reduce ground
  loop size
• Water storage tanks buried in ground
• Open Loops
• Provide good efficiency at low first cost
• Not permittable in California due to Water
  Resource Regulations

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
12
How it works
Radiant Floors
Applications
Types of Loops
Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
13
How it works
Mechanics of Design
Applications
Types of Loops

• Most important Design Requirement
• Air Removal, Air Removal, Air Removal!!!
• Basic Principals to Loop Design
• Heating Cooling Dominated Load
• Weather and Climate Zone
• Ground Condition Soil Type
• Moisture Content of soil annual
• Space or Installation Limitations
• Cost Factors
• Contributing Factors
• Size, Number Run Time of Units
• Location of Equipment
• Pump Station configuration
• Pump Size Distribution Design
• Most Important Flush Purge

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
14
How it works
Software
Software used by EER Wright Soft
Applications
Types of Loops
Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs

• Other Good Software Available
• GLHE Pro IGSHPA
• GeoLink
• OEMs Water Furnace Climate Master

15
How it works
Applications where would we best use this
technology?
Applications
Types of Loops

• Residential Single Family Home
• Mini-Castle (Mega Home)
• Multi-Family
• Senior Housing
• Housing Communities
• Commercial Offices
• Service Stations, Malls, TI Structures
• Government, New, Retro, Historic
• Educational, Schools, Colleges
• Winery, Food Processing
• Solar Compatibility
• Radiant Floors

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
These pools bathroom operate with a GeoExchange
system!
16
How it works
Residential Single Family Homes
Applications
Types of Loops
Radiant Floors
Mech. of Design
Software
Mini- Castles
Multi-family
Installations
Examples
Costs
Commercial
17
How it works
Applications
Applications
Types of Loops
Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
18
How it works
Installation Solutions
Applications
Types of Loops

• Vertical
• Horizontal
• Down Flow
• Attic
• Rooftop
• Soffits
• Closets
• ¾ Ton
• 7-25 Ton
• Zoned

Radiant Floors
Mech. of Design
Software
Installations
Examples
Costs
19
How it works
Costs
Applications
Types of Loops
For every 1-BTU of Electricity to operate
Compressor and Pumps 4 to 5 BTUs are Extracted
for the Earth
Radiant Floors
Mech. of Design
Heating COPs range from 4.0 to 5.0
Cooling EERs range from 20 to 30.0
Software
Installations
Drilling Cost can range from 4000 to 5000 per
Bore depending on design
Examples
Costs
Other Loop Types and reduce Loop Costs by 30 to
50
Geo Equipment Costs are Equivalent to mid range
efficiency Conventional Equipment
Lowest Life Cycle Cost of all HVAC Applications
20
(No Transcript)
21
(No Transcript)
22
(No Transcript)
23
(No Transcript)
24
(No Transcript)
25
(No Transcript)
26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
(No Transcript)
33
(No Transcript)
34
(No Transcript)
35
(No Transcript)
36
(No Transcript)
37
(No Transcript)
38
(No Transcript)
39
(No Transcript)
40
(No Transcript)
41
(No Transcript)
42
(No Transcript)
43
(No Transcript)
44
(No Transcript)
45
GEO LOOP CALCS
46
(No Transcript)
47
(No Transcript)
48
(No Transcript)
49
(No Transcript)
50
(No Transcript)
51
(No Transcript)
52
(No Transcript)
53
(No Transcript)
54
(No Transcript)
55
(No Transcript)
56
(No Transcript)
57
(No Transcript)
58
(No Transcript)
59
(No Transcript)
60
(No Transcript)
61
(No Transcript)
62
(No Transcript)
63
(No Transcript)
64
(No Transcript)
65
(No Transcript)
66
(No Transcript)
67
(No Transcript)
68
(No Transcript)
69
(No Transcript)
70
(No Transcript)
71
(No Transcript)
72
BTU PER HOUR PER GALS OF WATER
73
Energy Cost Comparison
74
Energy Cost Comparison Space
75
Energy Cost Comparison water
76
Sulse Pool
77
Variable Speed Cost Comparison
78
WaterFurnace Install Specification