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Changsha (No DIMM) Liquid Cooling Project Report

2024-10-12

Customer Requirements Input

Design Parameters

Requirement

CPU Specification

EGS, 385W*2

Ambient Temperature (°C)

35

Cooling Fluid

PG25 or Deionized Water

Inlet Water Temperature (°C)

40

Flow Rate (LPM)

2.4Parallel + Series.

Tcase(℃)

<  ℃(2.4LPM)

Thermal Resistance (°C/W)

≤   (2.4LPM,At 2.4 LPM, with Thermal Grease - Momentive 4090, Thickness 0.1mm)

Flow Resistance (kPa)

≤ KPa (At 2.4 LPM, including cold plates and pipelines, excluding quick connectors)

Cold Plate Pressure (bar)

≥10

Material

Cu

Detailed design model and simulation model of the cold plate.

Detailed design model and simulation model of the cold plateDetailed design model and simulation model of the cold plate a

Simulated Boundary Conditions (Set According to Working Conditions)

Simulated Boundary Condition

Working Condition Parameters
CPU Power 385 W*2
Ambient Temperature (°C) 35
Cooling Fluid PG25
Cold Plate. Inlet Temperature (°C) 40
Flow Rate (LPM) 2.4(Series Connection)
Material Cu
Heat Source Type EGS
Skived Fin Density Thickness:0.2mm ;Gap:0.3mm & 0.5mm
Switch CPU Power Consumption No
Switch CPU Power Consumption No
VR Power Consumption No

Simulation Results and Analysis 

- Working Condition 1 (2.4 LPM PG25 Inlet Water Temperature 40°C) Power 385W * 2
- Front View Temperature Cloud Diagram

Changsha (No DIMM) Liquid Cooling Project Report

(Bottom  Temperature Cloud Diagram)
The maximum internal temperature of the CPU chip is 64.66°C
The temperature difference between the inlet and outlet is 9.39°C.

Changsha (No DIMM) Liquid Cooling Project Report (2)Changsha (No DIMM) Liquid Cooling Project Report (7)

Simulation Results and Analysis 

-CPU Surface Temperature Cloud Diagram

Changsha (No DIMM) Liquid Cooling Project Report (3)

The Upper CPU chip surface temperature Tc has a temperature difference of 2.2°C

Changsha (No DIMM) Liquid Cooling Project Report (4)

The lower CPU chip surface temperature Tc has a temperature difference of 2.5°C.

Simulation Results and Analysis 

-The temperature difference between the inlet and outlet is 9.39°C.
-Water Flow Temperature Cloud Diagram

Changsha (No DIMM) Liquid Cooling Project Report (5)Changsha (No DIMM) Liquid Cooling Project Report (7)

Simulation Results and Analysis 

- Working Condition 1 (2.4 LPM PG25 Inlet Water Temperature 40°C) Power 385W * 2
- The pressure drop between the inlet and outlet of the upper cold plate on CPU1 is 4.9 KPa.
- The pressure drop between the inlet and outlet of the lower cold plate on CPU1 is 4.2 KPa.
- The pressure drop between the inlet and outlet of the upper cold plate on CPU0 is 6.4 KPa.
- The pressure drop between the inlet and outlet of the lower cold plate on CPU0 is 5.7 KPa.
- The pressure drop between the inlet and outlet is 22.2 KPa. The actual pressure drop may be higher, requiring experimental verification.

Changsha (No DIMM) Liquid Cooling Project Report (6)

Water Flow Pressure Cloud Diagram 

Water Flow Pressure Cloud Diagram