Heat accounts for nearly half of the world’s total energy usage, and today most of that heat still comes from fossil fuels. At Green Therma, we have developed an innovative solution to harvest Earth’s heat, helping businesses, communities, and cities realize their sustainability and energy goals.
At Green Therma, we have developed the Heat4Ever™ solution to tackle today’s heat challenges reliably, efficiently, and with long-term impact. Our solution sets a new standard for harnessing renewable heat from the Earth’s crust, combining a high-performance solution with low operational complexity and eliminating most geological risks.
Once installed, Heat4Ever™ generates heat with no fuels, no power, and no emissions. Delivering the heat requires a simple circulation pump, which can be powered by renewable sources and as a closed-loop system, it operates without polluting air, water, or soil, and does not consume water making it an environmentally sound heat technology.
Being independent of fuels from foreign states and by hiding plants below ground in decentralized systems, the Heat4Ever™ solution brings resilience and security to the heat infrastructure. Users benefit from certainty, security, as well as long-term visibility and stability of their supply and cost, which is crucial for planning and resilience in today’s uncertain and energy dependent world.
Heat4Ever™ ensures local heat wherever it is needed, in the quantities needed. Unlike many geothermal systems, the solution does not depend on specific geological conditions and can supply anything from small campuses, industrial parks, to entire city grids. Heat4Ever™ is designed with flexibility in mind and can be scaled to meet specific local heat requirements in areas that have previously been off-limits for geothermal development. The system can range from a few Heat4Ever™ wells to large projects with dozens of wells, ensuring that heat production aligns with the demand.
Heat4Ever™ is a long-term investment for the benefit of current and future generations. Although the initial installation cost of the solution may be higher than that of traditional heating systems, its lifespan is significantly longer, and operational costs are much lower. With minimal maintenance requirements, low dependency on external resources, and the capability to provide consistent heat year-round, Heat4Ever™ installations offer substantial value to communities, asset owners, and off takers for generations.
Relying solely on the continuous energy from the Earth’s crust, Heat4Ever™ is a weather-independent source of renewable energy that produces heat every second of every day throughout the entire year, ensuring a stable supply of heat and reducing reliance on intermittent sources. Unlike many other renewable sources, Heat4Ever™ offers flexible heat production and is fully controllable, allowing production to be ramped up, down or even paused, depending entirely on needs. Altogether, this makes Heat4Ever™ an ideal source for baseload heat.
No noise. No smoke. No eyesore. Once installed, Heat4Ever™ operates silently blending seamlessly into the background while providing entire neighborhoods or industrial parks with renewable and reliable heat. Being designed to fit into a small container, the need for acres of land on the surface is eliminated and the solution can be fully integrated into the natural environment or even placed below ground, freeing up space for people and nature in today’s crowded societies.
The Heat4Ever™ solution is engineered to last for decades using conventional components tested for decades in the toughest environments. With no oxygen in the well, corrosion risks are virtually eliminated, and our closed-loop design avoids output degradation and dependency on the surrounding subsurface. Just steady heat, year after year.
Heat4Ever™ works by capturing the constantly emitted energy from the Earth’s core and turning it into clean, usable heat at surface level. Safely, reliably, and without interfering with subsurface environments.
The system works by circulating water in a completely closed pipe solution, where the working fluid runs inside the pipes deep underground without entering the underground. As the working fluid moves within the pipe installed in deep hot rock, it absorbs natural heat from the surrounding rock. This energy is brought back to the surface with the innovative DualVac™ technology and can then be utilized for heating homes, buildings, or industrial processes such as horticulture, breweries, campuses, and medical centers.
Being a fully closed-loop system, cold fluid is pumped through a vertical pipe section and into a deep horizontal pipe section surrounded by hot rock.
·As the water travels underground within the pipe, it absorbs natural heat from the surrounding rock, which will typically be 90-150°C (194-302°F) hot.
The heated water is then moved up to the surface facility, where the energy is extracted in a heat exchanger and used by the people as pure, renewable heat.
The same water is continuously reused, circulating through the closed-loop system, again and again.
A key feature of Heat4Ever™ is our patented DualVac™ insulation pipe technology. This innovation creates a continuous vacuum over the entire pipe-string that insulates the hot and cold sections of the pipe. Working with the same principles as a thermos, the DualVac™ technology minimizes fluid heat loss on its way to the surface and maximizes temperature preservation and energy output from the solution. The ability to maintain the temperature allows direct use of the heat into district heating networks and a variety of industrial processes.
The Heat4Ever™ solution builds on decades of proven engineering expertise from the oil and gas industry. From drilling methods to pipe materials, the system utilizes components that have been tested many thousands of times in some of the world’s most demanding environments, ensuring the use of readily available and well-understood technology.
Geothermal energy has long been regarded as a promising source of clean energy. However, traditional geothermal systems often face significant challenges. They require specific underground conditions, such as hot water reservoirs, porous and permeable rock, as well as the right pressure and flow. These systems can be complex to construct, risky to operate and may require fracking. Therefore, they are limited in terms of where they can be installed and have uncertain lifetimes.
Our closed-loop Heat4Ever™ system does not depend on the presence of an underground water reservoir or any specific rock, making it work in most geological conditions, giving it true global potential. Because it is a completely sealed system, it eliminates contact with the subsurface, thereby avoiding risks of subsurface pollution, drinking water contamination and fracking dependency. Low risk is integral to our design.
Unlike traditional systems that may experience performance degradation over time, Heat4Ever™ consistently delivers reliable output for decades, and with a single-well design, installation is simpler, faster, and involves less risk.
Consequently, Heat4Ever™ provides an affordable, renewable, and resilient geothermal solution that is safe, flexible, and ready to scale anywhere in the world with low risk.
At the heart of our offering is the Heat4Ever™ solution, an engineered system that includes our DualVac™ insulated piping, topside units, and digital interfaces. It is designed for performance, safety, and long-term operational stability.
Beyond solutions, we offer continuous geothermal monitoring and optimization services that help operators maximize output and ensure efficient long-term performance. Through data and insights, we help our customers get the most out of every installation.
In every project, our role is clear: we are the key technology partner helping geothermal developments succeed. We work closely with project developers, utilities, investors, asset owners and our strategic business network of well companies and rig operators to deliver Heat4Ever™ solutions to businesses, towns, governments, and communities worldwide.
For our full-scale demonstration plant in Aalborg, we will be responsible for the construction, ownership, and operation of the plant. This approach differs from future projects where we will concentrate on becoming the preferred technology provider to the geothermal ecosystem with our Heat4Ever™ solution.
Automatikvej 1
2860 Søborg
Denmark
CVR: 43858076
