Výsledky vyhledávání - "Tetsuya WAKUI"

Akademický článek

An effective approach for deriving and evaluating approximate optimal design solutions of energy supply systems by time series aggregation

Autor: Ryohei Yokoyama, Yuji Shinano, Tetsuya Wakui

Publikováno v: Frontiers in Energy Research, Vol 11 (2023)

It is important to design multi-energy supply systems optimally in consideration of their operations for variations in energy demands. An approach for efficiently solving such an optimal design problem with a large number of periods for variations in

Externí odkaz: https://doaj.org/article/f78d072796ac41caaa3647eaae3ddde3

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Akademický článek

Reduction in platform motion and dynamic loads of a floating offshore wind turbine-generator system by feedforward control using wind speed preview

Autor: Tetsuya WAKUI, Kouki TANAKA, Ryohei YOKOYAMA

Publikováno v: Mechanical Engineering Journal, Vol 9, Iss 4, Pp 22-00066-22-00066 (2022)

To reduce both the platform motion and dynamic loads of floating offshore wind turbine-generator systems, feedforward control for high wind speed regions is developed by combining with the wind speed previewed by a nacelle-mounted lidar. First, the w

Externí odkaz: https://doaj.org/article/5094b119c0f4436c8d92a514be61212e

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Akademický článek

Numerical Analysis for Performance Evaluation of a Multi-Functional CO2 Heat Pump Water Heating System

Autor: Ryohei Yokoyama, Masashi Ohkura, Takuya Nakamata, Tetsuya Wakui

Publikováno v: Applied Sciences, Vol 8, Iss 10, p 1829 (2018)

In recent years, CO2 heat pump water heating systems have been developed, and their performances have been enhanced while their functions have been expanded. In a multi-functional system, used for both hot water supply and bath heating, hot water ret

Externí odkaz: https://doaj.org/article/c1a81c45b17b4034a914316263a9fbb3

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Stabilization of power output and platform motion of a floating offshore wind turbine-generator system using model predictive control based on previewed disturbances

Autor: Ryohei Yokoyama, Tetsuya Wakui, Atsushi Nagamura

Publikováno v: Renewable Energy. 173:105-127

Model predictive control of a floating offshore wind turbine-generator system, in which wave height as well as inflow wind speed is regarded as the previewed disturbances, is developed to stabilize power output and platform motion and reduce dynamic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3a8ec8f6ff9de00e3810cecc770a5569
https://doi.org/10.1016/j.renene.2021.03.112

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Predictive management for energy supply networks using photovoltaics, heat pumps, and battery by two-stage stochastic programming and rule-based control

Autor: Kento Sawada, Hirohisa Aki, Tetsuya Wakui, Ryohei Yokoyama

Publikováno v: Energy. 179:1302-1319

Predictive management for energy supply networks using photovoltaics generation (PV) units, heat pump water-heating units (HPUs), and battery units is developed by uniquely combining two-stage stochastic schedule programming and rule-based control to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4edc277326d5b3e8c0ff302215db190c
https://doi.org/10.1016/j.energy.2019.04.148

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