Stability based approach to design cold-water pipe (CWP) for ocean thermal energy conversion (OTEC)

Adiputra, Ristiyanto; Utsunomiya, Tomoaki

doi:10.1016/j.apor.2019.101921

Cited by 49 publications

(19 citation statements)

References 15 publications

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“…In the world, OTEC power plants have been installed in several locations, e.g., Saga and Kumejima in Japan, with respective energy outputs of 30 kW and 100 kW. OTEC is still in the pilot project stage for several reasons, one of which is the problem with the cold water pipe (CWP) component (Adiputra & Utsunomiya, 2019). Indonesia had also made several plans for the development and research of OTEC.…”

Section: B Ocean Thermal Energy Conversion (Otec)mentioning

confidence: 99%

“…In the endeavor to develop OTEC in Indonesia, setting the site in Mentawai Island, Adiputra et al (2020) proposed a preliminary design of OTEC to convert oil tanker ships into OTEC floating structures to reduce the capital cost of OTEC installation. Considering the problem in the CWP component, Adiputra and Utsunomiya (2019) also conducted research on the design of CWP components with a stability-based approach based on internal flow effect (IFE). Adiputra draws the conclusion that, in light of the findings, installing clump weights is important to limit motion displacement, FRP is the most suitable material, and the pinned joint at the top is preferred to lessen applied stress.…”

Section: B Ocean Thermal Energy Conversion (Otec)mentioning

confidence: 99%

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Renewable Energy: Policy and Strategy

Ristiyanto Adiputra,

Muhammad Iqbal Habib,

Erwandi

et al. 2023

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Renewable energy is generally referred to energy that may be renewed. Recently, attention to the use of renewable energy has been increasing, including in Indonesia. Since renewable energy comes from nature and uses natural resources, Indonesia has considerable resources that can potentially be used to produce renewable energy. Responding to this, it is essential to see how renewable energy is utilized, which is discussed in this book. This book conveys the discussion of renewable energy from the perspective of Indonesia's condition. Chapters in the book address many aspects of new and renewable energy discourse, including technology, policy and regulation, financial strategy, and social aspects. Written by various qualified authors in each field, this book shows how collaboration is much needed in implementing the strategy and policy for the use of new and renewable energy in Indonesia. Renewable Energy: Policy and Strategy is hoped to be a valuable source of knowledge concerning new and renewable energy solutions. Several recommendations can be implemented, and this book is here to become a reference for policymakers in achieving the target of net zero emissions.

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Section: B Ocean Thermal Energy Conversion (Otec)mentioning

confidence: 99%

Section: B Ocean Thermal Energy Conversion (Otec)mentioning

confidence: 99%

Renewable Energy: Policy and Strategy

Ristiyanto Adiputra,

Muhammad Iqbal Habib,

Erwandi

et al. 2023

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“…Figure 1 illustrates potential locations for ocean thermal power plant or ocean thermal energy conversion (OTEC) in Indonesia [5]. Moreover, Mentawai Islands Regency with its chain of around seventy islands in West Sumatera Province is another prospective site for OTEC [6,7].…”

Section: Power Generations In Indonesiamentioning

confidence: 99%

Working Fluid Candidates Selection for 100kW Ocean Thermal Power Generation Based on Environmental, Safety, and Thermodynamic Constrains

Halimi

Atolah²,

Julianti

et al. 2020

TELKA

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Due to its equatorial location, Indonesia has a huge amount of ocean thermal energy resource. However, this alternative renewable energy resource is still not well developed yet. In this paper, a selection procedure of working fluid for a 100 kW ocean thermal power generation is presented. The screening process was based on environmental, safety and thermodynamic constrains to obtain the best working fluid for this application. Five working fluid candidates are analyzed i.e. ammonia, butane, butene, isobutane, and isobutene. In term of environmental and safety aspects, ammonia is the best solution. But in thermodynamic point of view, isobutane shows the highest power conversion efficiency of 6.13%, whereas ammonia's efficiency is only 1.87% for the same power output.

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“…With the widespread application of fluid energy [1], such as oil and natural gas [2], pipeline transportation has become an increasingly important energy transportation method [3]. In addition, pipelines also play an important role in urban water transport [4]. With the large-scale development of pipeline engineering [5], the service lives of pipelines have been prolonged [6], and accidents caused by human damage, media corrosion, and other factors leading to pipeline leakage have increased annually [7].…”

Section: Introductionmentioning

confidence: 99%

Research on Passing Ability and Climbing Performance of Pipeline Plugging Robots in Curved Pipelines

Yan

Wang

et al. 2020

IEEE Access

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To repair leaking pipelines for oil, natural gas and other dangerous media, a kind of pipeline sealing robot is proposed. The device is mainly divided into a robot drive unit, connection unit, and blocking unit. The robot drive unit is used to pull the blocking unit, allowing it to move in the pipeline. The connection unit is used to connect the robot drive unit and the blocking unit. The blocking unit is used to complete the repair at the leakage point. When the robot operates, the drive unit drags the blocking device to the pipeline leakage location, and the front camera can detect the size and shape of the leakage hole. The sealing unit is located at the leakage point, an airbag is inflated, and the adhesive in it is used to seal and repair the leak. Two performance indices (climbing performance and curve passing performance) are evaluated when the robot drive unit is walking. A 3D model of the robot is established, and the performance index of the robot is simulated and analyzed using virtual prototype technology. An experimental platform is built for verification. The conclusions are as follows: (1) A spring with a 13 N/mm rigidity yielded the best performance, and the robot could crawl up a 37° slope. (2) When the deflection angle of the driving wheel was set to 30°, the robot could smoothly pass a bend with a radius of curvature of 500 mm. Thus, the robot performance met the design requirements.

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Stability based approach to design cold-water pipe (CWP) for ocean thermal energy conversion (OTEC)

Cited by 49 publications

References 15 publications

Renewable Energy: Policy and Strategy

Renewable Energy: Policy and Strategy

Working Fluid Candidates Selection for 100kW Ocean Thermal Power Generation Based on Environmental, Safety, and Thermodynamic Constrains

Research on Passing Ability and Climbing Performance of Pipeline Plugging Robots in Curved Pipelines

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