通过浊度和电导率测量确定乙二醇基流体的质量.pdf

1、Lauren Huffman,Dow Inc.Turbidity and Electrical Conductivity Measurements to Determine PG25 Fluid Quality Turbidity and Electrical Conductivity Measurements to Determine PG25 Fluid Quality Lauren Huffman,Dow,Inc.COOLING ENVIRONMENTS&LIQUID COOLINGOverview of existing OCP standard for PG based fluids

2、Turbidity basics and concernsElectrical conductivity basics and concernsCall to ActionIntroductionComparison of common cooling fluids1 Assuming there are corrosion inhibitors in the fluid and proper maintenance is followed.2Depends on the type of fluid.Cold Plate Cooling Loop Requirements Rev.2,Tabl

3、e 1https:/www.opencompute.org/documents/cold-plate-cooling-loop-requirements-rev-2-pdfaccessed 8/18/2025ParameterTreated WaterPropylene Glycol WaterDielectric Fluid(Single Phase)Dielectric Fluid (two-phase)Thermal PerformanceHighMedLowHigh(when at saturation)Mainenance ScheduleHighMedLowLowRisk of C

4、orrosionLow1Low1NoneNoneRisk of BiofoulingMed1Low1NoneNoneElectrical ConductivityHighHighVery LowVery LowEnvironmental ConcernsLowGlycol DischargePotential for PFAS,ODP,GWPPFAS,ODP,GWPOperating PressureLowLowLowLow or High2Relative Cost scale$Key fluid parameters for PG25-based fluid qualityCharacte

5、ristic PerformanceTest MethodAppearanceClear and Particulate FreeVisualPropylene glycol,vol%PG 25:24.5-29.5ASTM D3321PG 55:53.0-57.5%ASTM D3321Freeze PointPG 25:9 to 15 F(-13 to-9 C)ASTM D3321PG 55:-37 to-51 F(-38 to-46 C)ASTM D3321pH8.0-10.5ASTM D1287Reserve Alkalinity4mL,based on fluid as-isASTM D

6、1121Copper2 ppmASTM D6130Iron2 ppmASTM D6130Total Hardness100 ppmASTM D6130Chloride25 ppmASTM D5827Sulfate25 ppmASTM D5827Neither turbidity nor electrical conductivity are a part of the current key fluid parameters.Test fluid on bi-annual or quarterly basis,fluid conditions should not change signifi