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- Conference Paper:
Abidin et al.
Ocean Thermal Energy Conversion (OTEC) harnesses thermal energy stored at different seawater depths via power generation from a thermodynamic closed-loop cyclical system. Apart from its consistent energy generation, it could be diversified into other side industries, making OTEC an attractive and sustainable source of renewable energy. However, the process that utilises seawater as its main…
- Conference Paper:
Halimi and Generanta
Nowadays, the energy demand is continuous increasing due to the growing population in the world. However, the major primary energy resources, fossil fuels, are inadequate. Thus, it is required to find another energy resources, especially the renewable ones, to meet the energy demand. One of prospective renewable energy resources is marine energy. In this paper, an ammonia-water zeotropic…
- Journal Article:
Lee et al.
An azeotropic mixture of R32/R290 is proposed for both building air-conditioning and ocean thermal energy conversion (OTEC) applications. R32/R290 is an environmentally safe working fluid mixture with no ozone depletion potential (ODP) and low global warming potential (GWP). This mixture can successfully replace R410A used in many residential air-conditioners and heat pumps since its GWP is…
- Report:
Miller and Ascari
Ocean Thermal Energy Conversion can exploit natural temperature gradients in the oceans to generate usable forms of energy (for example, cost-competitive baseload electricity in tropical regions such as Hawaii) free from fossil fuel consumption and global warming emissions. The No.1 acknowledged challenge of constructing an OTEC plant is the Cold Water Pipe (CWP), which draws cold water from…
- Conference Paper:
Azam et al.
Ocean Thermal Energy Conversion (OTEC) is a renewable energy source in which energy is produced by converting the heat stored in the sea or the ocean thermal energy into valuable work, based on the temperature difference between the warm surface seawater and the cold deep seawater. One of the OTEC system requirements is to have a seawater temperature difference at a minimum of 20 °C within a…
- Journal Article:
Matsuda et al.
Recently, the importance of sustainable energy using renewable resources has been recognized. As one of the sustainable energy resources, ocean thermal energy conversion (OTEC) is important for the development of a next-generation energy source. This paper proposes a method to construct a state-space model for an OTEC plant using the Rankine cycle. The state-space model is constructed based on…
- Presentation:
Yu and Asthagiri
Ocean thermal energy conversion (OTEC) uses large temperature differences between the surface and deep waters in the ocean for dependable renewable energy production. Compared to traditional approaches which use a working fluid, thermoelectric (TE) OTEC utilizes TE materials and has fewer moving parts, therefore promising greater corrosion resistance, biofouling resistance, and more widespread…
- Journal Article:
Straatman and van Sark
Solar thermal electricity (STE) generation offers an excellent opportunity to supply electricity with a non-CO2 emitting technology. However, present costs hamper widespread deployment and therefore research and development efforts are concentrated on accelerated cost reductions and efficiency improvements. Many focus on the latter, but in this paper we rather focus on attaining…
- Journal Article:
Zhang et al.
The practical implementation of ocean thermal energy conversion technology faces constraints due to the low temperature differentials, resulting in limited energy conversion efficiency. This research introduces a novel combined power-refrigeration cycle that utilizes a hybrid liquid-gas-gas ejector to amplify the conversion efficiency. The gas extracted from the turbine is employed as…
- Journal Article:
Uehara et al.
A performance analysis of an OTEC plant using an integrated hybrid cycle (I–H OTEC Cycle) has been conducted. The I–H OTEC cycle is a combination of a closed-cycle OTEC plant and a spray flash desalination plant. In an I–H OTEC cycle, warm sea water evaporates the liquid ammonia in the OTEC evaporator, then enters the flash chamber and evaporates itself. The evaporated steam enters the…
- Journal Article:
Zhang et al.
This study proposes a novel extraction–ejection combined power and refrigeration cycle for ocean thermal energy conversion (OTEC). Ammonia-water is utilized as the working fluid. By introducing a steam-turbine extraction-gas-driven ejector between the evaporator and the absorber, the gas flows into the absorber after it is cooled, thereby enabling the cycle to recover pressure-difference…
- Journal Article:
Dezhdar et al.
Given the limitations of fossil fuels, humans must develop alternate energy sources. Solar energy and ocean thermal energy are known as a safe, secure, promising, and clean instrument for this purpose due to their enormous potential. A hybrid system of solar energy and ocean thermal energy with a thermoelectric generator is examined in this study to generate clean electricity and utilize the…
- Journal Article:
Ahmadi et al.
Hydrogen can be produced in a relatively environmentally benign manner (depending on the source of the input energy) via splitting water by photocatalysis, thermochemical cycles and electrolysis, and hydrogen production by proton exchange membrane (PEM) electrolysis has numerous advantages. Ocean thermal energy conversion (OTEC) usually incorporates a low-temperature Rankine cycle which boils…
- Journal Article:
Panchal and Bell
A systems study for simultaneous production of desalinated water and electric power using the hybrid-cycle OTEC system was carried out. The hybrid cycle is a combination of open and closed-cycle OTEC systems. A 10 MWe shore-based hybrid-cycle OTEC plant was discussed and corresponding operating parameters were presented. Design and plant operating criteria for adjusting the ratio of water…
- Journal Article:
Narayanan
Ocean Thermal Energy Conversion (OTEC) power plants offer a green source of renewable energy. Since India is a tropical country and a peninsula, the prospects of OTEC power generation are extremely bright in India. Among the three modes of operation (open cycle, closed cycle and hybrid cycle) of OTEC system, the hybrid mode is most promising. However, one of the chief technical obstacles in…
- Conference Paper:
Rabas et al.
Hybrid-cycle OTEC power plants are shown to be potentially the most flexible and cost effective in obtaining any specific mix of electrical power and desalinated water. This paper describes two particular hybrid configurations, one achieves maximum power production and the other maximum water production for a given cold sea-water flow rate and pipe size. When power is the desired commodity and…
- Journal Article:
Masutani and Takahashi
The concept of ocean-thermal energy conversion (OTEC) takes advantage of the naturally occurring temperature difference between the surface and deeper waters of the open tropical ocean. This article discusses the basis for OTEC, closed and open cycles for energy generation, and the possibility of freshwater generation as a by-product of a hybrid of the closed and open cycles.
- Conference Paper:
Ramachandran et al.
This paper presents the energy analysis of a theoretical multi-generation plant which utilizes integrated solar thermal energy and ocean thermal energy for hydrogen and desalinated water production. The proposed novel plant consists of Ocean Thermal Energy Conversion (OTEC) unit coupled with a solar boosted Multi-Effect Distillation (MED-TVC) unit. The temperature difference of the seawater…
- Event: …
International Conference on Progressive Research in Industrial & Mechanical Engineering (PRIME 2021)
- Journal Article:
Zhang and Bian
In this study, a combined cooling and power system is constructed based on the Guohai Cycle, and the cooling and power output performance of the cycle is analyzed by numerical simulation. In the scope of this study, it can be clearly seen that the improvement of thermal efficiency and primary energy rate in the combined cooling and power system. In addition, the effects of operating conditions…
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