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Institute of National Colleges of Technology

Hiroyuki Shiraiwa

Kenichi Yasuda

Hidetoshi Kaneo

Koji Satou

Kenjiro Narita

Yoshio Takakura

Yukio Hirama

[Problem to be Solved] A technical object is to develop a novel cooling mechanism for a data center that can be operated at low running costs, can eliminate dust penetration, water droplet occurrence, and water leakage, can reduce temperature unevenness in the indoor space, and can achieve prompt fire extinction with little damage even in the case where a fire breaks out. [Solution] Provided is a cooling mechanism for a data center, including: an evaporative condenser and a liquid receiver arranged outside of the data center; and an evaporator arranged in an indoor space of the data center. The indoor space is cooled by evaporating a refrigerant in the evaporator, and the refrigerant is condensed by the evaporative condenser.

Cooling mechanism for data center

To eliminate a vertically asymmetrical deflection, a rolling mill comprises a device for measuring horizontal deflections of upper and lower work rolls 2, 3 during rolling, a device for comparing values measured on the upper and lower sides and calculating the difference therebetween, and a horizontal deflection controller four determining whether the difference exceeds a predetermined range or not and imparting a horizontal bending to at least one of the work rolls. To eliminate a transversely asymmetrical deflection, a rolling mill comprises a device for measuring horizontal deflections of at least one of the work rolls at axially spaced positions during rolling, a device for comparing values measured on at the axially spaced positions and calculating the difference therebetween, and a horizontal deflection controller for determining whether the difference exceeds a predetermined range or not and imparting a horizontal bending to the one work roll at least one of the axially spaced positions. This prevents an adverse effect by the work rolls being horizontally deflected in a vertically or transversely asymmetrical way, reduces the diameter of the work rolls, and increases the allowable rolling load. Stable rolling of high-quality strips with good shape or flatness is thus achieved.

Rolling mill and method

Growing community of inventors

Miyakonojo, Japan

Hiroyuki Shiraiwa