HP DL320 hp ProLiant DL320 generation 2 server high-density deployment - Page 5

input current and thermal dissipation calculations - proliant dl320s server

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hp ProLiant DL320 generation 2 server high-density deployment technical white paper 5 Item @ Maximum Power Supply Rated Input Current 100 VAC 200 VAC Maximum System Measured Input Current Specification 2.77A 1.38A Maximum System Thermal Dissipation (per hour) Relative Humidity (noncondensing) Operating Nonoperating 944BTUs 10 to 90% 10 to 95% Note: The SA5302 option is a PCI card available from HP. Any third-party PCI cards used in the server must comply with the industry-standard PCI specifications for dimension, weight, power, and thermal requirements. input current and thermal dissipation calculations Input power is the key in deriving input current and thermal dissipation. For a given input power, the input current will vary depending on the input voltage level. The relationship among the current, the voltage, and the power for the power supply input is as follows: Input Current = Input Power/Input Voltage For example, Input Current = 100 W/110 V = 0.91 A Input Current = 100 W/208 V = 0.48 A The input power of a server depends on the operational state of the system. For example, during the initial power up, a server consumes more power due to the hard drives' spin-ups. It should be noted that in the ProLiant DL320 Generation 2 server, the two hard drives spin-up one after the other. Therefore, the peak input power requirement changes significantly when the first drive is added, but not as much when the second drive is added. After the initial power up, the input power varies depending on the operating system and the application software running on the server. During standby, only the auxiliary portion of the power supply is consuming power to support operations of a very limited part of the system, for example, the Remote Insight Lights-Out Edition (RILOE) option, NICs, and so on. Thermal dissipation can be calculated from the input power as follows: Thermal Dissipation = Input Power * 3.41 For example, Thermal Dissipation = 100 W * 3.41 = 341 BTUs/hour Thermal Dissipation = 292 W * 3.41 = 996 BTUs/hour

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hp ProLiant DL320 generation 2 server high-density deployment technical white paper
5
Item
@
Specification
Maximum Power Supply Rated Input Current
100 VAC
2.77A
200 VAC
1.38A
Maximum System Measured Input Current
Maximum System Thermal Dissipation (per hour)
944BTUs
Relative Humidity (noncondensing)
Operating
10 to 90%
Nonoperating
10 to 95%
Note:
The SA5302 option is a PCI card available from HP. Any third-party PCI cards used in the
server must comply with the industry-standard PCI specifications for dimension, weight, power,
and thermal requirements.
input current and thermal dissipation calculations
Input power is the key in deriving input current and thermal dissipation. For a given input power,
the input current will vary depending on the input voltage level.
The relationship among the current, the voltage, and the power for the power supply input is as
follows:
Input Current = Input Power/Input Voltage
For example,
Input Current = 100 W/110 V = 0.91 A
Input Current = 100 W/208 V = 0.48 A
The input power of a server depends on the operational state of the system. For example, during
the initial power up, a server consumes more power due to the hard drives’ spin-ups. It should be
noted that in the ProLiant DL320 Generation 2 server, the two hard drives spin-up one after the
other. Therefore, the peak input power requirement changes significantly when the first drive is
added, but not as much when the second drive is added. After the initial power up, the input
power varies depending on the operating system and the application software running on the
server. During standby, only the auxiliary portion of the power supply is consuming power to
support operations of a very limited part of the system, for example, the Remote Insight
Lights-Out Edition
(RILOE) option, NICs, and so on.
Thermal dissipation can be calculated from the input power as follows:
Thermal Dissipation = Input Power * 3.41
For example,
Thermal Dissipation = 100 W * 3.41 = 341 BTUs/hour
Thermal Dissipation = 292 W * 3.41 = 996 BTUs/hour