Invention Reference Number
This technology transforms existing underground boreholes into dynamic diurnal thermal storage systems. By actively managing heat or cold transfer during non-peak hours, the approach improves heat pump performance, reduces peak electrical demand, and lowers system installation requirements. The result is a more cost-effective and energy-efficient ground-source heat pump solution, expanding accessibility for broader adoption.
Description
This innovation enables underground boreholes to function as daily thermal storage systems, complementing conventional seasonal storage in ground-source heat pump applications. Through active charging during off-peak hours, thermal energy—either heat or cold—is stored in the ground for later use during peak demand periods. This process reduces the size and depth of borehole heat exchangers required for effective system operation, lowering both initial installation and long-term operating costs. The method also supports integration into demand response programs, allowing users to shift energy usage patterns for reduced utility bills. By enhancing efficiency, decreasing infrastructure needs, and promoting cost savings, this technology presents a scalable solution for more sustainable building heating and cooling.
Benefits
- Reduces installation depth and length requirements for borehole heat exchangers
- Decreases peak electricity demand and improves heat pump efficiency
- Lowers capital and lifecycle costs for ground-source heat pump systems
Applications and Industries
- Commercial and residential heating and cooling systems
- Utility demand response and energy efficiency programs
Contact
To learn more about this technology, email partnerships@ornl.gov or call 865-574-1051.
