Geothermal Energy Glossary

I. What is an Intermediate-Temperature Geothermal System? An intermediate-temperature geothermal system is a type of geothermal energy system that harnesses the heat stored beneath the Earth’s surface at temperatures ranging from 150 to 300 degrees Fahrenheit. This temperature range is ideal for a variety of applications, including electricity generation, heating, and cooling. Unlike high-temperature geothermal … Read more

I. What is a Closed Loop Geothermal System? A closed loop geothermal system is a type of heating and cooling system that harnesses the natural heat stored in the earth to regulate the temperature of a building. Unlike traditional heating and cooling systems that rely on burning fossil fuels or electricity to generate heat or … Read more

I. What is a Geothermal Power Purchase Agreement (PPA)? A Geothermal Power Purchase Agreement (PPA) is a contract between a geothermal power producer and a buyer, typically a utility or large commercial entity, that outlines the terms of the sale of electricity generated from a geothermal power plant. The PPA establishes the price, quantity, and … Read more

I. What is Silica Scaling? Silica scaling is a common issue that occurs in geothermal energy production systems. Silica, a compound found in rocks and minerals, can dissolve in geothermal fluids and precipitate out as a solid when the temperature and pressure conditions change. This solid silica can accumulate on the surfaces of pipes, valves, … Read more

I. What is a Geothermal Reservoir? A geothermal reservoir is a natural underground area where hot water and steam are trapped in porous rocks and fractures. These reservoirs are sources of geothermal energy, which can be harnessed to generate electricity and heat buildings. Geothermal reservoirs are typically found near tectonic plate boundaries, where magma heats … Read more

I. What is Groundwater Recharge? Groundwater recharge is the process by which water from precipitation, surface water, or irrigation infiltrates into the ground and replenishes underground aquifers. This natural process is essential for maintaining the water balance in aquifers and ensuring a sustainable supply of groundwater for drinking water, agriculture, and other uses. Groundwater recharge … Read more

I. What is an Open Loop Geothermal System? An open loop geothermal system is a type of geothermal heating and cooling system that uses groundwater as a heat source or sink. Unlike closed loop systems that circulate a refrigerant through a series of underground pipes, open loop systems pump water from a well or other … Read more

I. What is Geothermal Energy Certification? Geothermal energy certification is a process by which individuals or companies in the geothermal industry demonstrate their knowledge, skills, and expertise in the field of geothermal energy. This certification serves as a validation of their competency and proficiency in various aspects of geothermal energy production, utilization, and management. It … Read more

I. What is a Geothermal License? A geothermal license is a permit that allows individuals or companies to explore, develop, and operate geothermal resources for energy production. Geothermal energy is generated from the heat stored beneath the Earth’s surface, which can be harnessed to produce electricity or heat buildings. In order to access and utilize … Read more

I. What is Geothermal Sustainability Assessment? Geothermal sustainability assessment is a process used to evaluate the environmental, social, and economic impacts of geothermal energy projects. It involves analyzing the potential risks and benefits associated with harnessing geothermal resources for energy production. This assessment helps stakeholders make informed decisions about the development and operation of geothermal … Read more