GS Enviro HMMH Geothermal

GS Environmental and Groundwater Associates

GSEGAHARRIS MILLER MILLER & HANSON INC.

Why Geothermal?

Clean, renewable, efficient energy obtained from

beneath the earth’s surface.



Why Geothermal?

Cost Benefits:•30-70% annual energy savings•Lower operating cost•Re-use of waste heat•Reduced cost of emissions control•Rebates, grants, tax incentives

Environmental Benefits:•Use of renewable energy source•One of the most efficient heating and cooling solutions available•No reliance on fossil fuels•Eliminates CO health threats•Reduced CO2 emissions



Types of geothermal well systems

Closed LoopOpen Loop / Standing Column WellDirect Exchange / Open Diffusion



Closed Loop

• Most common system• Wells typically installed 400’ to 500’ deep• Average tonnage = 150ft/ton•Contains environmentally safe water-antifreeze mix•Very little maintenance once installed•Well system not affected by environmental conditions, i.e. contamination•Wells not generally affected local geological conditions.•State & federal tax credits and/or grants typically apply.

•Examples of Closed Loop Systems:

•King Point Maritime Academy, NY•Internal Revenue Service buildings, Andover, MA•Many military bases through the U.S.



Open Loop / Standing Column Well

•Usually installed where space is limited•Not applicable at all sites due to geological conditions (need bedrock)•Average tonnage = 100ft/ton (greater with bleed, approx. 10% gain)•More maintenance concerns – submersible pumps, water quality in wells, etc.•State & federal tax credits and/or grants typically apply.

•Examples:

•Harvard University, MA•Yale University, CT•Trinity Church, Boston, MA



Direct Exchange / Open Diffusion



Direct Exchange / Open Diffusion

1) A deep production well is drilled to an underground heat source

2) The pressurized steam or hot water is released and piped to a power plant, where its force turns a turbine

• Some advantages of geothermal energy are no fossil fuel emissions and no nitrogen oxide emissions on the property.

•Examples:

•Nesjevellir Geothermal Plant, Iceland•Geysers Geothermal Plant, Sonoma and Lake Counties, CA•Steamboat Spring, Reno, NV



Conceptual Closed Loop Geothermal Design



Benefits of using geothermal at airports

•Reduce / eliminate emissions•Carbon Monoxide•Nitrogen Oxides•Sulfuric Oxides•Volatile organic compounds and hydrocarbons

•Quick return on investment•Airports typically operate 24/7•Large open areas help reduce number of heat pump units•Typical R.O.I. = 5-10 years

•Heat runways / taxiways•Hydronic radiant heating – hot water circulates through a series of pipes within the ground, pavement, concrete, etc.

•Airports have large open areas that can support buried geothermal systems



Sample airport projects



Paris, FranceCharles de Gaulle AirportOpen Diffusion Geothermal Well System

New YorkJFK International AirportClosed Loop Geothermal Well System

Portland, MainePortland International JetportClosed Loop Geothermal Well System

Nantucket, MassachusettsNantucket Memorial AirportClosed Loop Geothermal Well System

Juneau, AlaskaJuneau International AirportClosed Loop Geothermal Well System

Hydrogeologic investigationsTest well & bedrock drilling explorationGroundwater and soil sample collectionFracture trace analysisGroundwater withdrawal permitsPump test design, implementation, and analysisGroundwater computer modelingCapture zone and time-of-travel studiesGeophysical explorationsGeophysical explorationsNitrate loading analysesGroundwater mounding analysesContamination remediationEnvironmental site assessmentPump systems design and constructionExpert witness testimony / litigation support

GSEGA Capabilities



Geothermal Experience• Senior Hydrogeologist, Gene Schrager, has over 25 years experience in

groundwater exploration, well construction, aquifer testing, and preparation of reports and documents. GSEGA can provide turnkey services from site feasibility analyses to final geothermal well field installations. Services provided include:

• Feasibility Analyses: Close loop, standing column, direct exchange and/or open diffusion geothermal systems

• Geothermal Well Field Design;• Hydrogeological Reports and Estimated Drilling Cost;• Well Permitting;• Health and Safety Plan Preparations;• Thermal Conductivity Testing;• Regulatory Compliance and Reporting;• Geothermal Wellfield Construction Management• Wellfield Troubleshooting.



Geothermal Project Experience #1

• Internal Revenue Service (IRS) Property, Andover, Massachusetts

• Closed-Loop Geothermal Project- Proposed 500-Ton System ($40,000 feasibility study)

• Project management engineering /

hydrogeological services• Developed drill bid documents• Obtained city & state permits• Conducted test well drilling over site

and quality control• Conducted thermal conductivity

testing• Developed geothermal test well

report for future design



Geothermal Project Experience #2

• Bradley Air Force National Guard, Bradley, Connecticut

• Closed Loop Geothermal Project• 50 Ton System ($500,000)• 25 closed look wells – 400’ in

depth

• Project management engineering / hydrogeological services

• Thermal conductivity testing• Preparation of drill bid

documentation• Installation and management of

geothermal well field• Removal of existing HVAC system• Installation of ceiling mounted

geothermal heat pumps• Start-up commissioning



Geothermal Project Experience #3• Veterans Affairs Medical Center, Reno,

Nevada• Direct Exchange Geothermal Project

($950,000)

• Responsible for winning a federally funded direct-exchange geothermal test well project and for soliciting, reviewing, and negotiating drilling proposal with sub-contractors

• Conducted environmental assessment (EA) under federal guidelines

• Prepared all permits and approvals under Nevada state and city regulations

• Supervised construction of 9 2,200’ geothermal test wells

• Conducted geothermal pump testing• Conducted geothermal injection testing• Prepared a geothermal feasibility report with a

preliminary design assessment



Geothermal Project Experience #4• Rockport Elementary School, Rockport, Maine

• Open Diffusion Geothermal Project-150 Ton System ($500,000)

• Responsible for analyzing pumping and diffusion rates for an existing six-well bedrock system consisting geothermal supply wells and diffusion wells.

• Performed aquifer testing• Reviewed well field construction details• Collected and analyzed water quality samples• Trouble shoot existing well pumping system,

i.e. poor grounds and/or leaking pitless adaptors

• Conducted injection / diffusion test at selected wells

• Prepared report with recommendations



Contact

GS Environmental & Groundwater Associates, Inc.P.O. Box 4247Portsmouth, NH 03802T: 603-433-6120 www.gsega.com

Gene Schrager, C.G.Senior Hydrogeologist, PrincipalM: [email protected]

Jim BarrettManaging Partner / Project ManagerM: [email protected]

www.gsega.com GS Environmental and Groundwater Associates


Harris Miller Miller & Hanson Inc.77 South Bedford StreetBurlington, MA 01803T: 781.852.3125 | F: 781.229.7939www.hmmh.com

Stephen B. BarrettDirector of Clean EnergyM: [email protected]

GS Enviro HMMH Geothermal

Documents

loop open loop

types of geothermal

nesjevellir geothermal

close loop

system juneau

system nantucket

system portland

large open areas