Open Loop Geothermal System
An open loop geothermal system uses groundwater that can be discharged back into the aquifer or as surface flow into a lake or stream. This type of system involves the withdrawal and discharge of water from a natural source, so it is important to consult a hydrologist to ensure that this process is done correctly. Triterra’s team of geothermal energy consulting specialists and expert hydrologists can make sure that this type of energy saving heating and cooling system is properly designed to conform to environmental regulation and cause minimal impact.
Requirements for an open loop geothermal system:
- An aquifer that can supply the required water volume and quality.
- Disposal method for discharge water (injection, surface discharge to lake, storm sewer or infiltration beds).
Regulatory considerations for an open loop geothermal system:
- Depending on discharge volume, permits from MDEQ for disposal of water may be required.
- If over 70 gpm, MDEQ Groundwater Assessment Model approval is required. (reviews impact on fish)
Advantages of an open loop geothermal system:
- Open system installation can cost 50% less than the closed loop geothermal system.
- Open system can cost 75% less than the closed vertical system.
- Open system requires space for just one well, closed horizontal requires many acres or the vertical closed will require many borings.
Download Open Loop Geothermal Systems (.ppt)
Learn more about our geothermal heat services:
- Geothermal Heat System
- Geothermal Energy Consulting
- Closed Loop Geothermal System
- Geothermal Heating Cost
We would like to hear from you— contact us for more information on our service areas and what we can do for you.
