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Recent Developments in the Foam OTEC System.

CONF79063115

Publication Date	1979
Personal Author	Zener, C.; Molini, A.; Fort, T.; Fetkovich, J.; Greenstein, M.
Page Count	7
Abstract	In the foam open cycle OTEC system warm water literally lifts itself several hundred feet. In preliminary experiments the foam behavior seemed to depend in a capricious manner upon the temperature of the incoming water, the pressure of the spray condenser, and the foam mass flow rate. Through a combination of analysis and experiment we have developed an equation which governs the steady state rise of a foam column. This equation correctly predicts the effects upon the foam behavior of all controllable parameters. These parameters include, in addition to these mentioned above, the diameter and height of the foam column. It is shown that foam generated in an appropriate manner flows laminarly rather than turbulently, and has a well defined drag function. This drag function decreases as the inverse square of the column diameter. (ERA citation 05:020358)
Keywords	Ocean thermal power plants Drag Equations Foams Laminar flow Open-cycle systems Operation Surfactants Thermodynamic cycles Vapor condensers ERDA/140800
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	97N - Solar Energy 97I - Electric Power Production
Corporate Authors	Carnegie-Mellon Univ., Pittsburgh, PA.; Department of Energy, Washington, DC.
Supplemental Notes	OTEC conference, Washington, DC, USA, 19 Jun 1979.
Document Type	Technical Report
NTIS Issue Number	198019
Contract Number	EG-77-S-02-4459

Recent Developments in the Foam OTEC System.

Recent Developments in the Foam OTEC System.
CONF79063115

Publication Date	1979
Personal Author	Zener, C.; Molini, A.; Fort, T.; Fetkovich, J.; Greenstein, M.
Page Count	7
Abstract	In the foam open cycle OTEC system warm water literally lifts itself several hundred feet. In preliminary experiments the foam behavior seemed to depend in a capricious manner upon the temperature of the incoming water, the pressure of the spray condenser, and the foam mass flow rate. Through a combination of analysis and experiment we have developed an equation which governs the steady state rise of a foam column. This equation correctly predicts the effects upon the foam behavior of all controllable parameters. These parameters include, in addition to these mentioned above, the diameter and height of the foam column. It is shown that foam generated in an appropriate manner flows laminarly rather than turbulently, and has a well defined drag function. This drag function decreases as the inverse square of the column diameter. (ERA citation 05:020358)
Keywords	Ocean thermal power plants Drag Equations Foams Laminar flow Open-cycle systems Operation Surfactants Thermodynamic cycles Vapor condensers ERDA/140800
Source Agency	Technical Information Center Oak Ridge Tennessee
NTIS Subject Category	97N - Solar Energy 97I - Electric Power Production
Corporate Authors	Carnegie-Mellon Univ., Pittsburgh, PA.; Department of Energy, Washington, DC.
Supplemental Notes	OTEC conference, Washington, DC, USA, 19 Jun 1979.
Document Type	Technical Report
NTIS Issue Number	198019
Contract Number	EG-77-S-02-4459