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Title: Capture of Geothermal Heat as Chemical Energy

In this paper, fluids that undergo endothermic reactions were evaluated as potential chemical energy carriers of heat from geothermal reservoirs for power generation. Their performance was compared with that of H 2O and CO 2. The results show that (a) chemical energy carriers can produce more power from geothermal reservoirs than water and CO 2 and (b) working fluids should not be selected solely on the basis of their specific thermo-physical properties but rather on the basis of the rate of exergy (ideal power) they can deliver. Finally, this article discusses the results of the evaluation of two chemical energy carrier systems: ammonia and methanol/water mixtures.
Authors:
 [1] ;  [1] ;  [1] ;  [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Energy Systems
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Energy Sources. Part A, Recovery, Utilization, and Environmental Effects
Additional Journal Information:
Journal Volume: 37; Journal Issue: 24; Journal ID: ISSN 1556-7036
Publisher:
Taylor & Francis
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Office (EE-4G)
Country of Publication:
United States
Language:
English
Subject:
15 GEOTHERMAL ENERGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; chemical reactions; fluids; geothermal energy; power generation; thermodynamic analysis
OSTI Identifier:
1339155