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Hellbent Geothermal. Taking A Closer Look at the Value of Geothermal. John Managh Hellbent Geothermal March 3 rd , 2012. HELLBENT GEOTHERMAL. to a sustainable future. Geothermal Defined. Geo refers to earth Thermal refers to heat

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Taking a closer look at the value of geothermal

Taking A Closer Look at the Value of Geothermal

John Managh

Hellbent Geothermal

March 3rd, 2012

Hellbent geothermal1

to a sustainable future

Geothermal defined
Geothermal Defined

  • Geo refers to earth

  • Thermal refers to heat

    Geothermal = the use of the earth’s heat as the energy source for heating our homes

Geothermal technology
Geothermal Technology

Today the technology exists to bring this energy from the earth into our homes. We can harvest this energy from our own backyards.

Hellbent Geothermal can provide this service to help you dramatically reduce your energy consumption while lowering your environmental impact.

Hellbent geothermal

A geothermal system uses the energy of the sun, stored in the ground to keep you comfortable year round.

Even in the winter, when a blanket of snow covers the ground, this valley’s ground temperature is a constant 47degrees F.

This means that you have a steady supply of heat to keep you in comfort, even in the depths of the coldest winter.

Geothermal benefits
Geothermal Benefits the ground to keep you comfortable year round.

Two Reasons

provide an alternative to home heating and cooling using a renewable energy source

Operates on electricity

Uses a fraction of energy compared to a traditional furnace

No carbon emissions thus eliminating carbon output from your home

Great choice
Great Choice the ground to keep you comfortable year round.

Rising energy costs make geothermal a good option

Owners are searching for cheaper solutions to heating and cooling costs – slash utility bills by 66%

Owners want a realistic payback period – between 4 to 6 years in Columbia Valley

Twice the lifespan of conventional systems

Adds serious curb appeal and resale value to your property

Smell the roses
Smell the roses… the ground to keep you comfortable year round.

A little history
A Little History the ground to keep you comfortable year round.

You gotta know where you’ve been to know where you’re going…

We have been bringing heat into our homes for a long time!

The heat pump
The Heat Pump the ground to keep you comfortable year round.

The heat pump was described in 1853 by Lord Kelvin, with the first model built in 1855 by Peter Ritter von Rittinger.

After experimenting with a freezer, Robert Webber built the first ground-source heat pump in 1945.

The first successful commercial project was installed in the Commonwealth Building in Portland, Oregon in 1946 where it is now designated as a National Historic Mechanical Engineering Landmark.

Enabling technology
Enabling technology the ground to keep you comfortable year round.

The technology became popular in Sweden in the 1970’s, and has been growing slowly worldwide in acceptance ever since.

Open well systems dominated the market until development of polyethylene pipe in 1979 made closed loop systems economically viable.

The industry has averaged 30% growth per year.

How geothermal works
How Geothermal Works! the ground to keep you comfortable year round.

First task at hand
First task at hand the ground to keep you comfortable year round.

Heat loss and Cooling Load calculation.

Insures correct sizing. We want to design to 80% of our total heating load.

Determines outside requirements:

the number, length and depth of trenches and boreholes.

Also helps with balancing distribution

system inside

The ground loops
The Ground Loops the ground to keep you comfortable year round.

A variety of choices. Mostly site specific.

Water, antifreeze or refrigerant can be used as the loop medium.

Open-loop or Closed-loop.

Performance of the system will largely depend on the EWT.

Heat transfers from a warm area to a cooler area.

Geology the ground to keep you comfortable year round.

Local site geology will determine the length of the ground–loops.

Test holes will help determine the thermal conductivity.

Make use of water well logs.

Wet, saturated rock is great.

Dry, light soil is not so great.

The ground loops1
The Ground-Loops the ground to keep you comfortable year round.

A series of pipes are buried in the ground. A methanol solution is circulated through the piping to make them highly efficient conductors of heat.

In the winter, the methanol in the piping absorbs the heat from the ground and, now warmed up, the fluid is pumped back through the geothermal unit in the house and the process repeats itself.

In the summer the process is reversed if air conditioning is utilized. This will also preheat the ground for the upcoming winter.

Hellbent geothermal

Drilled boreholes may be the only choice for suburban or densely treed lots.

Best to drill below the house’s footprint with new construction.

Aim for 20’ x 20’ spacings. And angle, if possible.

Use high conductivity grout.

A reverse-return layout is required.

Trench below frostline and insulate all piping within 10’ of foundations.

Dx ground loops
DX Ground-Loops densely treed lots.

Contain R410a refrigerant.

Type K copper tubing.

Maximum 100’ drilling depth for a significant cost advantage

Ideal for restricted land area.

More efficient heat transfer with one less heat exchanger.

Fewer moving parts, including circ pump elimination. More reliable.

Cathodic protection added.

The house
The House densely treed lots.

Heating in the Winter

After the pipes have transferred their heat and the heat pump has done its work maximizing the heat value of the circulated fluid, the heat is then drawn off the heat exchanger and circulated throughout the house using the existing distribution system.

The house1
The House densely treed lots.

Cooling in the Summer

In the summer, the process is reversed. The hot air in the house is essentially absorbed by the geothermal unit which now circulates much cooler pipe fluid.

The heat is transferred first to the pipes then to the ground outside before returning, cooled, to the house.

The geothermal heat pump
The Geothermal Heat Pump densely treed lots.

The underground loops connect to the main geothermal unit installed in your house, and is connected to your home’s heating and cooling system.

Geothermal systems are compatible with your home’s distribution system:

Forced air


Domestic hotwater

Inside a heat pump
Inside a Heat pump densely treed lots.

Simply stated: A mechanical device that absorbs heat energy at one location and transfers it to another.

A heat pump can move 3.5 to 4.5 times more heat to or from a building than the energy required to operate it.

The energy efficiency of heating equipment is rated by their COP.

A heat pump's capacity is rated in “tons”.

Eg: 4-tons equals 48000Btus

Forced air
Forced-air densely treed lots.

Designed to match the capacity of the heatpump and needs of each room.

Increased airflow due to lower air temperatures will necessitate larger ductwork and/or additional registers.

Ductwork may have to be upgraded in retrofits to avoid excessive noise.

Use isolation collars and turning radii on the corners of the plenums.

A well designed geo forced-air system will eliminate hot and cold spots.

Radiant floors
Radiant Floors densely treed lots.

Perfect match for lower temp geo hotwater. Quiet, comfortable warmth.

Need a hotwater storage tank to avoid short cycling.

Adequately sized circ pump.

Insulate under slab.

Preferred choice for high ceilings and dust free environments.

Snow and ice melt option.

Domestic hot water
Domestic Hot Water densely treed lots.

You will benefit from free or reduced- cost hot water. A geothermal system will heat your water 2 to 3 times more efficiently than a regular hot water tank.

A separate desuperheater circuit isolates the potable hot water from the main hydronic circuit.

Backup systems
Backup Systems densely treed lots.

Plenum heater

Hydronic storage tank

Your house
Your House densely treed lots.

Ultimate Benefits

Low maintenance

Quiet Operation


Long System Life


High Reliability

Low purchased energy


Regulation densely treed lots.

Check for bylaws within in your municipality or regional district.

Obtain permits if necessary.

Check before you dig! Locate all other services on the property.

Ensure all work is to CSA 448 standards.

Especially for Grant applications.

The Canadian GeoExchange Coalition is Canada’s watchdog.

WorkSafeBC protocol

The environment
The Environment densely treed lots.

Geothermal systems use a renewable resource, the earth, which is efficient and non-polluting.

From NRC:

“There is unlikely to be a potentially larger mitigating effect on greenhouse gas emissions and the resulting global warming impact of buildings from any other current, market-available single technology, than from ground-source heat pumps”.

Federal and provincial governments recognize the important role that geothermal plays in reducing home energy use, and have created rebate programs that facilitate installation.

Incentives densely treed lots.

Livesmart BC : $2500

Eco-Energy Program

Low interest loans

Upcoming PAYS program.

Hellbent geothermal

Canada has a young industry. densely treed lots.

30000 residential and 6000 commercial installations.

Huge potential.

Could help Canada meet GHG reduction targets.

From the Pembina Institute: “Increasing residential geoexchange installations from 0.5% to 1.5% and commercial from 1.5% to 25 % is a realistic and cost-effective way to help Canada meet GHG reduction targets of 25% below 1990 levels by 2020.”

Local sustainability
Local Sustainability densely treed lots.

Know your Municipal Official Community Plan!

Seek local groups, programs, actions that demonstrate support for alternative energy consumption

Support and encourage changes in policy and by-laws to facilitate the process of utilizing progressive alternative energies – keep it moving!

Mentor and educate!

A final word
A Final Word densely treed lots.

“Do not wait for extraordinary circumstances to do good action;

try to use ordinary situations.”

Jean Paul Richter, Novelist and Humorist

Slide acknowledgement
Slide Acknowledgement densely treed lots.

  • New to the Powerpoint Presentation protocol, my apologies for not recognizing slides borrowed from Google images, friends, and family.

  • Many Thanks!

  • Available upon Request