Sun Microsystems Sun Fire B1600 Administration, Руководство по установке

Страница: 25 / 98

Chapter 1 Preparing for the Installation 1-11
1.5.1.2 Airflow Requirements
The Sun Fire B1600 blade system chassis has been designed to function in a natural
convection airflow when mounted in a rack or cabinet and uses front-to-back forced
air cooling. To meet the declared environmental specification follow these
guidelines:
■
The Sun Fire B1600 blade system chassis uses PSU fans that can achieve a
maximum airflow of 160 cfm in free air. Ensure that there is sufficient airflow
through the rack or cabinet.
■
The rack or cabinet in which the system chassis is mounted must provide inlet air
at the front of the system chassis. The airflow exhausts horizontally from the PSU
and SSC modules located at the back of the system chassis and must be able to
leave the cabinet.
■
Inlet and exhaust ventilation must both have a minimum open area of
22 in
2
(142 cm
2
) for each system chassis.
■
The use of perforated or solid door panels must allow adequate airflow to the
system chassis when the cabinet doors are closed.
1.5.1.3 Estimating the Heat Dissipation
To estimate the heat generated by a Sun Fire B1600 blade system chassis convert the
figure for the system’s power consumption from watts to BTU/hr.
The formula to convert from watts to BTU/hr is to multiply the power in watts by
3.415. For example:
total power consumption of blades + total power consumption of SSCs + total power
consumption of PSUs x 3.415 = xxxxx BTU/hr
For power consumption figures for the SSC, the PSU and blades, see “Estimating
Power Consumption” on page 1-12
Note – Do not install multiple Sun Fire B1600 blade system chassis in a four-post
rack or cabinet unless your cooling system is capable of dissipating in excess of the
total thermal load. For example:
(5 x 700W each system) x 3.415 = 11952.5 BTU/hr