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Title: Descriptive analysis of aquifer thermal energy storage systems

Abstract

The technical and economic feasibility of large-scale aquifer thermal energy storage (ATES) was examined. A key to ATESs attractiveness is its simplicity of design and construction. The storage device consists of two ordinary water wells drilled into an aquifer, connected at the surface by piping and a heat exchanger. During the storage cycle water is pumped out of the aquifer, through the heat exchanger to absorb thermal energy, and then back down into the aquifer through the second well. The thermal storage remains in the aquifer storage bubble until required for use, when it is recovered by reversing the storage operation. For many applications the installation can probably be designed and constructed using existing site-specific information and modern well-drilling techniques. The potential for cost-effective implementation of ATES was investigated in the Twin Cities District Heating-Cogeneration Study in Minnesota. In the study, ATES demonstrated a net energy saving of 32% over the nonstorage scenario, with an annual energy cost saving of $31 million. Discounting these savings over the life of the project, the authors found that the break-even capital cost for ATES construction was $76/kW thermal, far above the estimated ATES development cost of $23 to 50/kW thermal. It appears thtmore » ATES can be highly cost effective as well as achieve substantial fuel savings. ATES would be environmentally beneficial and could be used in many parts of the USA. The existing body of information on ATES indicates that it is a cost-effective, fuel-conserving technique for providing thermal energy for residential, commercial, and industrial users. The negative aspects are minor and highly site-specific, and do not seem to pose a threat to widespread commercialization. With a suitable institutional framework, ATES promises to supply a substantial portion of the nation's future energy needs. (LCL)« less

Authors:
Publication Date:
Research Org.:
Battelle Pacific Northwest Labs., Richland, WA (United States)
OSTI Identifier:
5352580
Report Number(s):
PNL-3298
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; AQUIFERS; HEAT STORAGE; THERMAL ENERGY STORAGE EQUIPMENT; ECONOMICS; FEASIBILITY STUDIES; TECHNOLOGY ASSESSMENT; ENVIRONMENTAL IMPACTS; MINNESOTA; ENERGY STORAGE; EQUIPMENT; GREAT LAKES REGION; NORTH AMERICA; STORAGE; USA; 250600* - Energy Storage- Thermal

Citation Formats

Reilly, R W. Descriptive analysis of aquifer thermal energy storage systems. United States: N. p., 1980. Web. doi:10.2172/5352580.
Reilly, R W. Descriptive analysis of aquifer thermal energy storage systems. United States. https://doi.org/10.2172/5352580
Reilly, R W. 1980. "Descriptive analysis of aquifer thermal energy storage systems". United States. https://doi.org/10.2172/5352580. https://www.osti.gov/servlets/purl/5352580.
@article{osti_5352580,
title = {Descriptive analysis of aquifer thermal energy storage systems},
author = {Reilly, R W},
abstractNote = {The technical and economic feasibility of large-scale aquifer thermal energy storage (ATES) was examined. A key to ATESs attractiveness is its simplicity of design and construction. The storage device consists of two ordinary water wells drilled into an aquifer, connected at the surface by piping and a heat exchanger. During the storage cycle water is pumped out of the aquifer, through the heat exchanger to absorb thermal energy, and then back down into the aquifer through the second well. The thermal storage remains in the aquifer storage bubble until required for use, when it is recovered by reversing the storage operation. For many applications the installation can probably be designed and constructed using existing site-specific information and modern well-drilling techniques. The potential for cost-effective implementation of ATES was investigated in the Twin Cities District Heating-Cogeneration Study in Minnesota. In the study, ATES demonstrated a net energy saving of 32% over the nonstorage scenario, with an annual energy cost saving of $31 million. Discounting these savings over the life of the project, the authors found that the break-even capital cost for ATES construction was $76/kW thermal, far above the estimated ATES development cost of $23 to 50/kW thermal. It appears tht ATES can be highly cost effective as well as achieve substantial fuel savings. ATES would be environmentally beneficial and could be used in many parts of the USA. The existing body of information on ATES indicates that it is a cost-effective, fuel-conserving technique for providing thermal energy for residential, commercial, and industrial users. The negative aspects are minor and highly site-specific, and do not seem to pose a threat to widespread commercialization. With a suitable institutional framework, ATES promises to supply a substantial portion of the nation's future energy needs. (LCL)},
doi = {10.2172/5352580},
url = {https://www.osti.gov/biblio/5352580}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 1980},
month = {Sun Jun 01 00:00:00 EDT 1980}
}