WELL TO WELL OPEN LOOP GEOTHERMAL SYSTEM

  • ITEM 1

WELL TO WELL OPEN LOOP GEOTHERMAL SYSTEM

OVERVIEW

The ground side of the geothermal system pumps water drawn from the underground Arapahoe aquifer, piping it up through a heat exchanger, and then returning it back to the aquifer. Hydro Resources drilled one of two multi-completion wells and equipped both. Providing design of controls, pumping equipment along with ongoing system support and service.

MAIN CHALLENGE

Design and implementation of a high pressure pneumatic water column control valve used to regulate pressure through the heat exchanger while varying flow through the system to match air-conditioning loads.

HYDRO’S SOLUTION

  • Drill 1 well
  • Design and implementation of plumbing, valves and regulators.
  • Pumps, Motors and VFDs for both wells.
  • High-pressure compressor and storage system.
  • Geothermal system controller design, construct and program.
  • Ongoing service and support.

ADVANTAGE

Since coming online during the summer of 2013, the geothermal heat-pump system has generated substantial savings. During the first year of operation, $95,000 in utility-bill savings was achieved. Savings are estimated to increase by about 3 percent annually, reaching $165,000 by 2029. Payback on the geothermal system is estimated to be 10 years.

CUSTOMER:
State of Colorado

KEY SERVICE(S) DELIVERED:
Geothermal Wells and Controls

LOCATION:
Colorado State Capitol

VITAL  STATISTICS

WELL DEPTH: N/A
TIME TO COMPLETION: 2.5 years