scholarly journals Availability of a high polymer resin coating aluminum to the plate heat exchanger for ocean thermal energy conversion plant using ammonia as working fluid

2013 ◽  
Vol 63 (4) ◽  
pp. 141-146 ◽  
Author(s):  
Hirofumi Arima ◽  
Kohei Koyama
Keyword(s):  
Heat Exchanger ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Plate Heat Exchanger ◽  
Working Fluid ◽  
High Polymer ◽  
Plate Heat ◽  
Polymer Resin ◽  
Thermal Energy Conversion ◽  
Ocean Thermal Energy

scholarly journals Analysis of Ocean Thermal Energy Conversion Power Plant using Isobutane as the Working Fluid

2018 ◽  
Vol 7 (1) ◽  
Keyword(s):  
Heat Exchanger ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Working Fluid ◽  
Ocean Thermal Energy Conversion ◽  
Thermal Energy Conversion ◽  
Useful Power ◽  
Design Characteristics ◽  
Process Energy ◽  
Ocean Thermal Energy

The use of organic isobutane will be investigated for a closed-cycle Ocean Thermal Energy Conversion (OTEC) onshore plant that delivers 110 MW electric powers. This paper will cover concept, process, energy calculations, cost factoids and environmental aspects. In isobutane cycle, hot ocean surface water is used to vaporize and to superheat isobutane in a heat exchanger. Isobutane vapor then expands through a turbine to generate useful power. The exhaust vapor is condensed afterwards, using the cold deeper ocean water, and pumped to a heat exchanger to complete a cycle. Results show the major design characteristics and equipment's of the OTEC plant along with cycle efficiency and cycle improvement techniques.

Performance Characteristics of 20kW Ocean Thermal Energy Conversion Pilot Plant

2015 ◽  
Author(s):  
Ho-Saeng Lee ◽  
Seung-Won Lee ◽  
Hyeon-Ju Kim ◽  
Young-Kwon Jung
Keyword(s):  
Heat Exchanger ◽  
Heat Source ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Temperature Difference ◽  
Heat Sink ◽  
Pilot Plant ◽  
Working Fluid ◽  
Thermal Energy Conversion ◽  
Ocean Thermal Energy

To experiment 20kW OTEC, the closed-cycle type of OTEC (Ocean Thermal Energy Conversion) was designed and manufactured. R32 (Difluoromethane, CH2F2) was used as the working fluid and a temperature of heat source and heat sink is 26°C, 5°C, respectively. The semi-welded type heat exchanger is applied for the evaporator and condenser and the cycle was designed for the gross power of 20kW. In the plate arrangement of the semi-welded type heat exchanger, one channel for working fluid is welded, and another channel for seawater is sealed by gasket. In this paper, various performance evaluations and experiments were carried out as constructing subminiature pilot plant of the OTEC and compared with the results of cycle analysis. In results, gross power of the turbine shows 20.1kW and cycle efficiency is 1.91% when heat source and heat sink is 26°C, 5°C. For the variation of temperature difference between the heat source and heat sink, when the temperature difference was 21°C, the gross power increased by about 33.3% from that when the temperature difference was 19 °C.

Experimental Studies on the Seawater Desalination System Based on Ocean Thermal Energy Conversion

2013 ◽  
Vol 448-453 ◽  
pp. 3254-3258
Author(s):  
Feng Yun Chen ◽  
Wei Min Liu ◽  
Liang Zhang
Keyword(s):  
Heat Exchanger ◽  
Energy Conversion ◽  
Thermal Energy ◽  
Sea Water ◽  
Economic Benefits ◽  
Seawater Desalination ◽  
Tube Heat Exchanger ◽  
Ocean Thermal Energy Conversion ◽  
Thermal Energy Conversion ◽  
Ocean Thermal Energy

Seawater desalination system has been established based on the ocean thermal energy conversion in this paper. Through compared finned tube heat exchanger with round tube heat exchanger obtained the fresh water output at different temperature and flow velocity of the warm and cold sea water. In this system the energy of the warm and cold sea water has been fully utilized, and so improved the economic benefits of the ocean thermal energy conversion.

scholarly journals Determine the best location for Ocean Thermal Energy Conversion (OTEC) in Iranian Seas

2016 ◽  
Vol 10 (5) ◽  
pp. 32 ◽  
Author(s):  
Ashrafoalsadat Shekarbaghani
Keyword(s):  
Energy Conversion ◽  
Thermal Energy ◽  
Caspian Sea ◽  
Power Plants ◽  
Sea Water ◽  
Working Fluid ◽  
The South ◽  
Ocean Thermal Energy Conversion ◽  
Thermal Energy Conversion ◽  
Ocean Thermal Energy

Two-thirds of the earth's surface is covered by oceans. These bodies of water are vast reservoirs of renewable energy.<strong> </strong>Ocean Thermal Energy Conversion technology, known as OTEC, uses the ocean’s natural thermal gradient to generate power. In geographical areas with warm surface water and cold deep water, the temperature difference can be leveraged to drive a steam cycle that turns a turbine and produces power. Warm surface sea water passes through a heat exchanger, vaporizing a low boiling point working fluid to drive a turbine generator, producing electricity. OTEC power plants exploit the difference in temperature between warm surface waters heated by the sun and colder waters found at ocean depths to generate electricity. This process can serve as a base load power generation system that produces a significant amount of renewable, non-polluting power, available 24 hours a day, seven days a week. In this paper investigated the potential of capturing electricity from water thermal energy in Iranian seas (Caspian Sea, Persian Gulf and Oman Sea). According to the investigated parameters of OTEC in case study areas, the most suitable point in Caspian Sea for capturing the heat energy of water is the south part of it which is in the neighborhood of Iran and the most suitable point in the south water of Iran, is the Chahbahar port.

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