Buoyancy organic Rankine cycle

In the scope of renewable energy, we draw attention to a little known technique to harness solar and geothermal energy. The design here proposed and analyzed is a conceptual hybrid of several patents. By means of a modified organic Rankine cycle, energy is obtained utilizing buoyancy force of a work...

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Bibliographic Details
Published in:Renewable energy 2011-03, Vol.36 (3), p.999-1002
Main Authors: Schoenmaker, J., Rey, J.F.Q., Pirota, K.R.
Format: Article
Language:English
Subjects:
Applied sciences
Buoyancy
Buoyancy force
Combined cycle
Combined cycle engines
Dichloromethane
Energy
Energy. Thermal use of fuels
Equipments, installations and applications
Exact sciences and technology
Geothermal energy
Installations for energy generation and conversion: thermal and electrical energy
methylene chloride
Natural energy
Organic Rankine cycle
Other installations: mhd power plants, fuel cell plants, incineration plants, etc
pentane
Pentanes
Rankine cycle
Renewable energy
Solar energy
Solar thermal conversion
temperature
thermodynamics
Working fluids
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Description
Summary:In the scope of renewable energy, we draw attention to a little known technique to harness solar and geothermal energy. The design here proposed and analyzed is a conceptual hybrid of several patents. By means of a modified organic Rankine cycle, energy is obtained utilizing buoyancy force of a working fluid. Based on thermodynamic properties we propose and compare the performance of Pentane and Dichloromethane as working fluids. Theoretical efficiencies up to 0.26 are estimated for a 51 m (Pentane) and 71.5 m (Dichloromethane) high column of water in a regime below 100 °C operation temperature. These findings are especially relevant in the scope of distributed energy systems, combined cycle plants, and low-temperature Rankine cycles.
ISSN:0960-1481
1879-0682
DOI:10.1016/j.renene.2010.09.014