Zobrazeno 1 - 10
of 161
pro vyhledávání: '"Shuichi UMEZAWA"'
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 90, Iss 933, Pp 23-00311-23-00311 (2024)
Dry storage of adsorbent reactors after contaminated water treatment in decommissioning contributes to reducing the risk of contamination spread. In general, the drying process of wet particles involves the simultaneous heat and mass transfers in the
Externí odkaz:
https://doaj.org/article/4a9cf4d6a04d426fa63b579e177a9391
Autor:
Kazushi MIYATA, Shuichi UMEZAWA
Publikováno v:
Mechanical Engineering Journal, Vol 11, Iss 2, Pp 23-00402-23-00402 (2024)
The heater method is a clamp-on type flow measurement method that can be applied to metal pipes in high-temperature environments and is useful for determining the adequate flow rate in existing pipes for the stable operation of thermal power plants.
Externí odkaz:
https://doaj.org/article/4e2dac355a9c42dba647efbee1fc1909
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 89, Iss 921, Pp 22-00267-22-00267 (2023)
High efficiency coal fired power plants are expected to operate at a certain rate due to low generated electricity costs. In coal fired power plants, coal mills are important machinery that pulverize the coal and supplies the coal powder to the boile
Externí odkaz:
https://doaj.org/article/ad70dff5bbe540b28f1ef60d9aa64d2d
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 89, Iss 921, Pp 22-00261-22-00261 (2023)
Superheaters are essential components in a coal-fired power plant because they keep the highest tube wall temperature points in the radiant boiler. The pressurized steam flowing in the superheater tubes is heated via the thermal radiation and convect
Externí odkaz:
https://doaj.org/article/008fcd38845b48c5a5b3807dc775e8f5
Publikováno v:
Mechanical Engineering Journal, Vol 9, Iss 4, Pp 22-00053-22-00053 (2022)
The operation of gas turbines under off-design conditions is becoming more frequent to absorb the power supply fluctuations from renewable power. By operating gas turbines at the off-design point, the flow rates of cooling air through the nozzle guid
Externí odkaz:
https://doaj.org/article/f874ff5ad6c24c68960985d7eb1970c7
Autor:
Shuichi UMEZAWA, Shuichi OHMORI
Publikováno v:
Mechanical Engineering Journal, Vol 9, Iss 4, Pp 22-00030-22-00030 (2022)
At a combined cycle power plant, gas turbine cooling air flowrate data is required for operation and maintenance because it is an important for analyzing not only the temperature of both stators and blades but also plant efficiency. However, it is ve
Externí odkaz:
https://doaj.org/article/700480a93d984681aa6163bef623a01e
Publikováno v:
Mechanical Engineering Journal, Vol 9, Iss 4, Pp 22-00040-22-00040 (2022)
Superheaters are critical components in a coal-fired power plant because they sustain the highest tube wall (metal) temperature point in the boiler. The pressurized steam flowing in superheater tubes is mainly heated via the thermal radiation and con
Externí odkaz:
https://doaj.org/article/dd586a116e6c44c5b0fd7512c8affc60
Autor:
Katsuhiko SUGITA, Takahiro MIYAOKA, Shuichi UMEZAWA, Shuichi OHMORI, Hisanobu KAWASHIMA, Tsuneaki ISHIMA
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 87, Iss 902, Pp 21-00035-21-00035 (2021)
Water spray is used for cooling intake air of gas turbine in thermal power plant. It is necessary to reduce the amount of residual droplets by optimizing the spray amount to keep the plant in good condition. In the actual thermal power plants, a phas
Externí odkaz:
https://doaj.org/article/aaf29b7922bc476ab1badb9198558047
Autor:
Akihiro UEMURA, Hironori MIYAZAWA, Takashi FURUSAWA, Satoru YAMAMOTO, Koichi YONEZAWA, Shuichi UMEZAWA, Shuichi OHMORI
Publikováno v:
Mechanical Engineering Journal, Vol 7, Iss 4, Pp 20-00068-20-00068 (2020)
The purpose of this study is to simulate unsteady steam flows through three-stage stator and rotor blade passages in a middle-pressure steam turbine operated in a power plant while considering manufactured and secular-changed blade shapes. The shapes
Externí odkaz:
https://doaj.org/article/770a9fdda7764a8da3834281e52f7dc8
Autor:
Koichi YONEZAWA, Masahiro TAKAYASU, Kazuyasu SUGIYAMA, Katsuhiko SUGITA, Shuichi UMEZAWA, Shuichi OMORI
Publikováno v:
Mechanical Engineering Journal, Vol 7, Iss 4, Pp 20-00122-20-00122 (2020)
A numerical study of aerodynamics in a deteriorated gas turbine was carried out. In the present study, a hybrid method of CFD simulation and heat balance analysis were used to estimate entire performance of the gas turbine cycle and local flow charac
Externí odkaz:
https://doaj.org/article/c061a76bb1804179b80183084226941b