Fundamentals of Underground Thermal Energy Storage (UTES) Systems  

Education Type: 
1.5 Hours


AIA Learning Units: 
1.0 LU
Professional Development Hours: 
1.5 PDH

This on-demand webinar discusses Underground Thermal energy storage (UTES). UTES is storing thermal energy in the ground to use later. The two main types of UTES systems are Aquifer Thermal Energy Storage (ATES) and Borehole thermal energy Storage (BTES). UTES systems are Fairly rare in the United States and the purpose of this webinar is to expand interest and knowledge of UTES systems. This webinar will explain the Advantages of UTES systems, and show the benefits of ATES and BTES systems. The webinar will also explain possible future applications of UTES systems like electricity and space.

This Video is sponsored by the Environmental Security Technology Certification Program (ESTCP) Technology Transfer Project.


Charles Hammock, PE, LEED AP BD+C, CGD of Andrews, Hammock, and Powel, Inc.   

This webinar is presented by Mr. Hammock as part of ESTCP/DoD UTES Technology Transfer Project. During the past 35 years, Mr. Hammock has been exclusively involved in the engineering of Heating, Ventilating and Air Conditioning (HVAC) systems for governmental, industrial, commercial and institutional clients at facilities throughout the United States and Internationally. His specialty and passions in this arena are centered on innovative deployments of advanced Geothermal Heat Pumps (GHPs) systems for governmental, institutional, and commercial clients. He served as the Principal Investigator (PI) for the Department of Defense's ESTCP Energy & Water 2017 Project of the Year where fiber optic based DTS and the integration of UTES with GHPs were demonstrated at two DoD Locations. He is a licensed Professional Engineer (PE) in multiple states and is one of the three founders of Andrews, Hammock and Powell, Inc., a US-based Consulting Engineering firm established in 1988 and located in Macon, Georgia.

Learning Objectives

This course will cover:

  • Why Consider Geothermal Systems?
  • Overview of Direct Use Geothermal Heat pump architecture vs. GHP systems designed for true thermal Storage
  • Underground Thermal Energy Storage (UTES)
  • Review of the DoD UTES Demonstrations Projects
  • Utilizing Distributed Temperature Sensing
Federal Agencies and Facility Criteria: