“Double-Space Urban Data Center” Developed, Contributing to Improvement of the Environment and Business Income

Air-conditioning running costs reduced by 60%, and server rack space increased by 30%

May 6, 2010Takenaka Corporation

Takenaka Corporation (President: Toichi Takenaka) has developed a green IT-type “Double-Space Urban Data Center,” which reduces air-conditioning running costs and CO2 emissions by more than 60 percent, and has 30 percent more server rack space compared to the ordinary double-layered floor-type used widely by data centers.
(Currently patent pending)
With the increase in cloud computing, and with the implementation of the Energy Saving Law, there is a rising demand for data centers, as well as calls for improvements in the efficient use of data center space and energy-saving performance.
The “Double-Space Urban Data Center” newly developed by Takenaka realizes an increase in server installation space and a great reduction in air-conditioning running costs.
The “Double-Space Urban Data Center” uses a large-span truss structure with a second-level server room installed above a two-meter height first-level floor. The air-conditioning system fans and coils can be separately installed above and below each of the floors. Because the air-conditioning system is built-in between the two levels, the data center building system could be called an amalgamation of “structure and air conditioning.”

photo:External view of the electrolytic cell、Residual chlorine measurement、Control panel

“Ordinary room”

photo:External view of the electrolytic cell、Residual chlorine measurement、Control panel
photo:External view of the electrolytic cell、Residual chlorine measurement、Control panel

“Double-Space Urban Data Center”

photo:External view of the electrolytic cell、Residual chlorine measurement、Control panel

“Diagram of the “Double-Space Urban Data Center”


An increase in server racks of 30 percent, which is directly connected to business income

By increasing structural strength through using truss beams, the number of columns in the server room has been reduced. Also, part of the air-conditioning system can be installed separately between the two floor levels, thereby reducing the air-conditioning system machine room by one half. This means the server rack space becomes 30 percent larger than an ordinary double-layered floor type.

Air-conditioning running costs and CO2 emissions reduced by 60 percent.

By building a large two-meter high space under the second-level of the server room there is no longer a problem of wiring becoming confused as there is with the ordinary double-layered floor type, and there is a dramatic improvement in ventilation. By improving the air-conditioning efficiency, as well as being able to reduce the number of air conditioners, adequate cooling effect can be achieved using medium temperature cold water between nine to 19 degrees, which is between two to five degrees warmer than ordinary cooling water. This means that air-conditioning running costs are reduced by over 60 percent.

Dramatic improvement in security because there is no need to enter the server room during maintenance.

Because there is an adequate space of two meters under the second-level server room floor, there is no need for maintenance workers to enter the server room during wiring maintenance. Thus, there is increased security in the server room. With ordinary double-layered floor type data centers, there has always been a security risk during maintenance because workers had to get to the floor areas inside the server rooms.

Less risk of water leaking through the ceiling, which is a natural enemy to servers.

Because of the improved floor rigidity and weight load-resistance of the server rooms, the server racks can be directly fixed to the floors. With ordinary double-layered floor type data centers, the racks have to be fixed to a structural floor under the free accessfloor, so there is a risk of damage to the waterproof paint film where the holes have been made for installation.

【Market movements and Takenaka’s approach】

With the growing trend to outsource, the service which entails the supervision and operation of data center information systems is growing at the annual rate of over 12 percent and is expected to become a 1.3 trillion yen market by 2013 (according to a report by IDC Japan, a company specializing in IT intelligence and advisory services).
Takenaka established the “Data Center Promotion Group” with experts in January 2010. The “Double-Space Urban Data Center” has been developed through the mobilization of the company’s architectural technologies to meet increased demand due to the rapid expansion of data centers because of cloud computing. The company will continue to vigorously develop this data center technology which will contribute to the environment as well as business.