scholarly journals OTEC modular experiment plant cold water pipe system design study. Executive Summary

1979 ◽  
Author(s):  
Keyword(s):  
System Design ◽  
Cold Water ◽  
Water Pipe ◽  
Design Study ◽  
Executive Summary ◽  
Pipe System

Dynamic Analysis Of Coupled OTEC Platform-Cold Water Pipe System

1978 ◽  
Author(s):  
D.Y. Chou ◽  
W.F. Minner ◽  
L.Y. Ragusa ◽  
R.T. Ho
Keyword(s):  
Dynamic Analysis ◽  
Cold Water ◽  
Water Pipe ◽  
Pipe System

Coupled Analysis Approach in OTEC System Design

2012 ◽  
Author(s):  
Shan Shi ◽  
John Halkyard ◽  
Nishu Kurup ◽  
Lei Jiang
Keyword(s):  
System Design ◽  
Temperature Difference ◽  
Heat Exchangers ◽  
Cold Water ◽  
Large Diameter ◽  
Working Fluid ◽  
Coupled Analysis ◽  
Ammonia Vapor ◽  
Water Pipe ◽  
Floating Platform

Ocean Thermal Energy Conversion (OTEC) technologies based on floating platforms generate electrical energy by utilizing the temperature difference between the deep ocean water and the surface water. One typical offshore floating OTEC system uses the temperature difference to drive a heat engine, utilizing a closed-loop Rankine cycle with a working fluid such as ammonia (NH3). Cold water is pumped through a large flexible pipe from approximately 1000m depth to heat exchangers which condense the ammonia vapor. Warm water from the surface is pumped through heat exchangers to evaporate the liquid ammonia to drive the turbine. An OTEC floating platform could be a semisubmersible, a spar, or other typical offshore hull form with a taut or a catenary mooring system. As opposed to oil and gas production platforms, the OTEC system consists of a large diameter cold water pipe (CWP) which will participate in the global performance of the floating platform. Its unique behavior also includes the contribution of CWP entrained water which behaves differently in lateral and vertical directions due to its open bottom design. The hydrodynamic behavior of the large scale cold water pipe is an important consideration in the system design and analysis. The study presented in this work includes the application of a fully coupled analysis program with an accurate cold water pipe dynamic model in OTEC floating system analysis. The study could be useful for future guidance and reference on OTEC floating platform designs.

Analysis and Design of the Cold-Water Pipe (CWP) for the OTEC System with Application to OTEC-1

1980 ◽  
Vol 17 (03) ◽  
pp. 281-289
Author(s):  
Allan T. Maris ◽  
J. Randolph Paulling
Keyword(s):  
Cold Water ◽  
Large Diameter ◽  
Deep Ocean ◽  
Water Pipe ◽  
Floating Platform ◽  
Pipe System ◽  
Analysis And Design ◽  
Thermal Energy Conversion ◽  
Diameter Pipe ◽  
Ocean Thermal Energy

OTEC--Ocean Thermal Energy Conversion--currently requires a large floating platform and a 1000-metre-long, large-diameter pipe to supply deep ocean cold water. The design of the pipe in this system requires the development and application of analysis procedures to determine the response of the coupled platform pipe system to sea loadings. This paper discusses the development of the analysis procedures and the results of the application of these procedures to several pipe designs which appear feasible for an OTEC-1 MW power plant system.

scholarly journals OTEC elastomer cold water pipe preliminary design study. Final report

1979 ◽  
Author(s):  
R D Mehring
Keyword(s):  
Cold Water ◽  
Final Report ◽  
Preliminary Design ◽  
Water Pipe ◽  
Design Study

scholarly journals Linear vs non-linear analysis on self-induced vibration of OTEC cold water pipe due to internal flow

2021 ◽  
Vol 110 ◽  
pp. 102610
Author(s):  
Ristiyanto Adiputra ◽  
Tomoaki Utsunomiya
Keyword(s):  
Cold Water ◽  
Internal Flow ◽  
Linear Analysis ◽  
Water Pipe ◽  
Non Linear

Dynamic Response of Cold Water Pipe (CWP) for OTEC Systems

1984 ◽  
Author(s):  
G. Bhuyan ◽  
C. Vendham
Keyword(s):  
Dynamic Response ◽  
Cold Water ◽  
Water Pipe

Preliminary Design of a 1-MWe OTEC Test Plant

1982 ◽  
Vol 104 (1) ◽  
pp. 3-8 ◽  
Author(s):  
T. Kajikawa
Keyword(s):  
Cold Water ◽  
Working Fluid ◽  
Test Plant ◽  
Mooring System ◽  
Preliminary Design ◽  
Closed Cycle ◽  
Water Pipe ◽  
Thermal Energy Conversion ◽  
Design Value ◽  
Ocean Thermal Energy

An ocean-based, 1-MWe (gross) test plant has been planned to establish the feasibility of OTEC (ocean thermal energy conversion) power generation in the revised Sunshine Project. The preliminary design of the proposed test plant employs a closed-cycle power system using ammonia as the working fluid on a barge-type platform with a rigid-arm-type, detachable, single-buoy mooring system. Two types each of titanium evaporators and condensers are to be included. The steel, cold-water pipe is suspended from the buoy. The design value of the ocean temperature difference is 20 K. The paper presents an overview of the preliminary design of the test plant and the tests to be conducted.

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