Cooling provisioning for heat generating devices

• US 20060225446A1
• Filed: 04/07/2005
• Published: 10/12/2006
• Est. Priority Date: 04/07/2005
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Bash, Cullen E., Sharma, Ratnesh K., Patel, Chandrakant D.
• Granted Patent: US 7,669,431 B2
• Time in Patent Office: Days
• US Class Current: 62/178
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: F24F 3/048 with temperature control at constant rate of air-flow
• CPC Class Codes: H05K 7/20745 within rooms for removing heat from cabinets, e.g. by air conditioning device
• CPC Class Codes: H05K 7/20836 Thermal management, e.g. server temperature control

Abstract

A method for controlling cooling provisioning for heat generating devices includes correlating the heat generating devices with primary actuators, such that the heat generating devices are associated with primary actuators having at least a predefined level of influence over the respective heat generating devices. The flow rates of air supplied by the primary actuators are set based upon volume flow rate requirements of the heat generating devices, such that the volume flow rate setting for a primary actuator is based upon the volume flow rate requirement for the heat generating devices associated with the primary actuator. In addition, the temperatures of the airflow supplied by the primary actuators are varied to substantially maintain associated heat generating devices within predetermined temperature ranges.

Claims

1. A method for controlling cooling provisioning for heat generating devices, said method comprising:

correlating the heat generating devices with primary actuators, such that the heat generating devices are associated with primary actuators having at least a predefined level of influence over the respective heat generating devices;

setting flow rates of air supplied by the primary actuators based upon volume flow rate requirements of the heat generating devices, wherein the volume flow rate setting for a primary actuator is based upon the volume flow rate requirement for the heat generating devices associated with the primary actuator; and

varying temperatures of the airflow supplied by the primary actuators to substantially maintain associated heat generating devices within predetermined temperature ranges.

2. The method according to claim 1, further comprising:

commissioning sensors with the primary actuators, such that the sensors are each in at least one primary actuator family; and

wherein the step of correlating the heat generating devices with the primary actuators further comprises correlating the heat generating devices with the commissioned sensors to correlate each of the heat generating devices with the primary actuators.

3. The method according to claim 2, further comprising:

for each primary actuator family, choosing a control sensor of the sensors, wherein the step of choosing a control sensor comprises choosing as the control sensor, the sensor having the highest positive temperature difference from a setpoint temperature, and if none of the sensors have positive temperature differences from the setpoint temperature, choosing as the control sensor, either the sensor having the largest negative difference from the setpoint temperature or the sensor having the smallest negative difference from the setpoint temperature.

4. The method according to claim 3, further comprising:

in each control sensor, determining a level of difference between a measured temperature and a predefined temperature and transmitting an error signal corresponding to the difference; and

wherein the step of varying temperatures further comprises manipulating secondary actuators of the primary actuators to vary the temperatures according to the error signals transmitted by the control sensors in respective primary actuator families to thereby substantially maintain the heat generating devices in each primary actuator family within predetermined temperature ranges.

5. The method according to claim 4, further comprising:

repeating the step of choosing a control sensor for each primary actuator family and the step of varying temperatures as error signals are transmitted by the control sensors.

6. The method according to claim 4, wherein the step of correlating further comprises assigning the primary actuator families into at least one zone, and wherein the step of choosing the control sensor further comprises choosing the sensor having the highest positive temperature difference from the setpoint temperature for each zone, and if none of the sensors have positive temperature differences from the setpoint temperature for each zone, choosing as the control sensor, either the sensor having the largest negative difference from the setpoint temperature or the sensor having the smallest negative difference from the setpoint temperature for each zone.

7. The method according to claim 6, wherein the step of varying temperatures further comprises manipulating secondary actuators to vary the temperatures according to the error signals transmitted by the control sensors in respective zones to thereby substantially maintain the heat generating devices in each zone within predetermined temperature ranges.

8. The method according to claim 1, further comprising:

determining recommended airflow volumes for the heat generating devices; and

wherein the step of setting the flow rates of air supplied by the primary actuators further comprises setting the primary actuators to supply air to their respective associated heat generating devices at the recommended airflow volumes.

9. The method according to claim 1, wherein the step of setting flow rates of air supplied by the primary actuators further comprises iteratively setting the flow rates of air supplied by the primary actuators and correlating the heat generating devices with the primary actuators at the iterated flow rates until the primary actuators are operating at levels below a predefined threshold.

10. The method according to claim 9, wherein the step of correlating the heat generating devices with primary actuators further comprises assigning the heat generating devices to associated primary actuator families and wherein the step of iteratively setting the flow rates of air supplied by the primary actuators further comprises:

(a) determining extents to which each primary actuator family is over-provisioned;

(b) reducing flow rates of air supplied by primary actuators in those primary actuator families determined to be over-provisioned beyond a predefined threshold;

(c) re-correlating and re-assigning the heat generating devices with primary actuator families; and

(d) determining whether the primary actuators are operating at levels below the predefined threshold.

11. The method according to claim 10, further comprising:

(e) repeating steps (a)-(d) in response to a determination that at least one of the primary actuators is operating at a level above the predefined threshold; and

(f) repeating steps (a)-(d) until it is determined that the primary actuators are operating at levels below the predefined threshold.

12. The method according to claim 11, further comprising:

periodically performing steps (a)-(f) in response to at least one of a passage of a predetermined period of time, manual instructions, and a change in equipment location or configuration.

13. The method according to claim 1, wherein the step of correlating the heat generating devices with primary actuators further comprises employing at least one of extrapolation and modeling techniques to correlate the heat generating devices with the primary actuators.

14. A system for controlling cooling provisioning for heat generating devices, said system comprising:

primary actuators configured to vary cooling provisioning for the heat generating devices; and

a controller configured to implement at least one algorithm configured to;

assign each of the heat generating devices to at least one primary actuator family according to correlations between the heat generating devices and the primary actuators;

set the primary actuators to supply air at volumes based upon the heat generating devices respectively contained in the primary actuator families; and

manipulate the primary actuators to vary the temperatures of the airflow supplied by the primary actuators to substantially maintain heat generating devices in respective primary actuator families within predetermined temperature ranges.

15. The system according to claim 14, further comprising:

sensors positioned with respect to at least one of the heat generating devices and the primary actuators; and

wherein the controller is further configured to assign each of the sensors to at least one primary actuator family according to correlations between the sensors and the primary actuators.

16. The system according to claim 14, wherein the controller is further configured to choose a control sensor for each of the primary actuator families, wherein the control sensor for each of the primary actuator families comprises the sensor having the highest positive temperature difference from a setpoint temperature, and if none of the sensors have positive temperature differences from the setpoint temperature, the controller is configured to choose as the control sensor, either the sensor having the largest negative difference from the setpoint temperature or the sensor having the smallest negative difference from the setpoint temperature.

17. The system according to claim 16, wherein the controller is further configured to implement algorithms for assigning the primary actuators into at least one zone and for choosing as a control sensor for each zone, the sensor having the highest positive temperature difference from the setpoint temperature, and if none of the sensors have positive temperature differences from the setpoint temperature, choosing as the control sensor, either the sensor having the largest negative difference from the setpoint temperature or the sensor having the smallest negative difference from the setpoint temperature.

18. The system according to claim 14, wherein each of the primary actuators comprises secondary actuators, said secondary actuators comprising:

a device for controlling supply airflow volume, wherein the controller is configured to control the device for controlling supply airflow volume to set the primary actuators to supply air at volumes based upon the heat generating devices contained in the primary actuator families; and

a device for controlling supply airflow temperature, wherein the controller is configured to control the device for controlling supply airflow temperature to vary the temperatures of the airflow supplied by the primary actuators.

19. The system according to claim 14, wherein the controller is further configured to set the flow rates of air supplied by the primary actuators based upon recommended airflow volumes for the heat generating devices.

20. The system according to claim 19, wherein the recommended airflow volumes comprise at least one of airflow volumes recommended by manufacturers of components housed in the heat generating devices and acceptable airflow volumes determined through testing.

21. The system according to claim 14, wherein the controller is further configured to implement algorithms to iteratively set the flow rates of the air supplied by the primary actuators and to reassign the heat generating devices to the primary actuator families at the iterated flow rates until the primary actuators are operating at levels below a predefined threshold.

22. The system according to claim 21, wherein the controller is further configured to implement algorithms for:

(a) determining extents to which each primary actuator family is over-provisioned;

(b) reducing flow rates of air supplied by primary actuators in those primary actuator families determined to be over-provisioned beyond a predefined threshold;

(c) re-correlating and re-assigning the heat generating devices with primary actuator families;

(d) determining whether the primary actuators are operating at levels below the predefined threshold;

(e) repeating steps (a)-(d) in response to a determination that at least one of the primary actuators is operating at a level above the predefined threshold; and

(f) repeating steps (a)-(e) until it is determined that the primary actuators are operating at levels below the predefined threshold.

23. A system comprising:

means for assigning heat generating devices to at least one primary actuator family, each primary actuator family having a primary actuator;

means for setting flow rates of air supplied by the primary actuators based upon volume flow rate requirements of the heat generating devices, wherein the volume flow rate setting for a primary actuator is based upon the volume flow rate requirement for the heat generating devices associated with the primary actuator; and

means for varying temperatures of the airflow supplied by the primary actuators to substantially maintain heat generating devices in each of the at least one primary actuator family within predetermined temperature ranges.

24. A computer readable storage medium on which is embedded one or more computer programs, said one or more computer programs implementing a method for controlling cooling provisioning for heat generating devices, said one or more computer programs comprising a set of instructions for:

assigning the heat generating devices to primary actuator families, such that each of the heat generating devices is assigned to a primary actuator family including a primary actuator having at least a predefined level of influence over the respective heat generating devices;

setting flow rates of air supplied by the primary actuators based upon volume flow rate requirements of the heat generating devices, wherein the volume flow rate setting for a primary actuator is based upon the volume flow rate requirement for the heat generating devices associated with the primary actuator; and

varying temperatures of the airflow supplied by the primary actuators to substantially maintain associated heat generating devices within predetermined temperature ranges.