Borehole Thermal Energy Storage Systems (BTES)   

Education Type: 
1.5 Hours


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

This webinar discusses Borehole Thermal energy storage (BTES). A BTES System is capable of capturing both a buildings waste heat (for use in winter) and "waste cooling" (for use in summer), delivering significant savings in the Cooling & Heating modes. In this live webinar we will discuss the fundamentals, construction, and performance of BTES HVAC systems in multiple DoD/commercial-office buildings. BTES HVAC systems have significant energy/water/maintenance savings and increase resiliency due to their thermal storage capability and underground placement! This Video is sponsored by the Environmental Security Technology Certification Program (ESTCP) Technology Transfer Project.

This Video is sponsored by ESTCP. ESTCP is an organization within the Department of Defense with the goal to promote and transfer new technologies that have had successful proof of concepts.


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:

  • Overview of Underground Thermal Energy Storage (UTES) and "Geothermal" systems;
  • Differentiation between traditional closed-loop Ground loop Heat Exchangers (GHXs) and Borehole Thermal Energy Storage (BTES) Architectures;
  • Review Important Components of BTES systems like reversing valves, concentric zoning, charging/ discharging modes, adiabatic dry coolers;
  • Overview of the Four DoD BTES projects;
  • Review Distributed Temperature Sensing (DTS); and
  • Explore BTES as a "Thermal Battery" or BTESe.
Federal Agencies and Facility Criteria: