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Analysis of Cost Reduction Potential of Vertical Bore Ground Heat Exchanger (Final)

Technical Report ·
DOI:https://doi.org/10.2172/1474649· OSTI ID:1474649
 [1];  [1];  [2];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Alabama, Tuscaloosa, AL (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
+ Show Author Affiliations
The geothermal heat pump (GHP), also referred to as a ground source heat pump, is a proven technology that can provide space conditioning and water heating with efficiencies higher than conventional heating, ventilation, and air-conditioning (HVAC) systems. This technology possesses great potential to become a mainstream technology for satisfying the thermal demands in the built environment. Analysis from the ongoing Geothermal Vision Study indicates that 100% retrofitting of commercial and residential markets with GHPs has the potential to save on the order of 6 quadrillion Btu per year (Liu et al. 2017). However, the current high installation costs and long payback periods limit the attractiveness of GHP installation in the United States. The cost of installing ground heat exchangers (GHXs) used for GHPs accounts for more than 30% of the total cost of a GHP system (NYSERDA 2017), and it is the biggest contributor to the cost premium of GHPs compared with conventional HVAC systems.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1474649
Report Number(s):
ORNL/TM-2018/756
Country of Publication:
United States
Language:
English

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32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION