This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Exergy Analysis of Aquifer Thermal Energy Storages
Annotation ability available
Sector:
Language:
English
Abstract
The application of exergy analysis (Second-Law analysis) to aquifer thermal energy storage (ATES) systems is investigated in order to facilitate proper assessments of overall system performances. The investigation involves the creation of an elementary ATES model, and the development of the corresponding expressions for efficiencies and for the quantities of energy and exergy that are injected and recovered. It is demonstrated that ATES performance measures based on exergy often are more useful and meaningful than those based on energy. Exergy efficiencies account for the temperatures associated with energy transfers to and from an ATES, as well as the quantities of energy transferred, and consequently provide a measure of how nearly ATES systems approach ideal thermodynamic performance. Energy efficiencies only account for energy transfer quantities, and thus do not provide a measure of approach to ideal performance. In fact, energy efficiencies are often misleadingly high because some of the energy recovered can be at too low a temperature to be available for a useful purpose. However, it is shown that the use of an appropriate threshold recovery temperature can partially eliminate the inherent misleadingness in ATES energy efficiencies.
Authors
Topic
Citation
Rosen, M. and Hooper, F., "Exergy Analysis of Aquifer Thermal Energy Storages," SAE Technical Paper 929196, 1992, https://doi.org/10.4271/929196.Also In
References
- Proc. 5th int. Conf. on Thermal Energy Storage (Thermastock 91) Scheveningen, The Netherlands 13-16 May 1991
- Proc. Bienniel Congr. int. Solar Energy Soc. Denver 17-24 Aug. 1991
- Proc. 3rd Int. Conf. on Energy Storage for Building Heating and Cooling (Enerstock 85) Toronto 22-26 Sept. 1985
- Rosen, M.A. Appropriate Thermodynamic Performance Measures for Closed Systems for Thermal Energy Storage Trans. ASME J. Solar Energy Engineering 1992
- Rosen, M.A. Hooper, F.C. Barbaris, L.N. Exergy Analysis for the Evaluation of the Performance of Closed Thermal Energy Storage Systems Trans. ASME J. Solar Energy Engineering 110 255 261 1988
- Rosen, M.A. Nguyen, S. Hooper, F.C. Evaluating the Energy and Exergy Contents of Vertically Stratified Thermal Storages 7.4.1 7.4.6
- Rosen, M. A. On the Importance of Temperature in Performance Evaluations for Sensible Thermal Energy Storage Systems 1931 1936
- Hoyer, M.C. et al. Short-term Aquifer Thermal Energy Storage (ATES) Test Cycles St. Paul, Minnesota, U.S.A 75 79