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SAND Report: SAND77-8264, December 1977.
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ABSTRACT:
Heat treated samples of three candidate fluids for sensible heat storage were analyzed using gel-permeation chromatography (GPC) and infrared spectrophotometry (IR). Comparison of this data with previous work done at the Rocketdyne Division of Rockwell International reveals that:
a. The oil
b. The oil is possibly experiencing some amount of dehydrogenation.
c. There is a very small amount of bulk polymerization taking place.
d. There is little reason to suspect that the oils suffered any significant amount of oxidation.
e. The approximate molecular weight range of fresh Caloria HT 43 is from 170 to 550.
Sufficient information is now available to enable design of a processor (fractional distillation column) to ostensibly prolong the usable lifetime of the oil.
Based upon the results of a fairly simplistic test run at Sandia, mechanical shear degradation due to pumping and fluid flow in general should not contribute significantly to fluid decomposition.
Heat treated samples of three candidate fluids for sensible heat storage were analyzed using gel-permeation chromatography (GPC) and infrared spectrophotometry (IR). Comparison of this data with previous work done at the Rocketdyne Division of Rockwell International reveals that:
a. The oil
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is undergoing large-scale thermal cracking that is probably catalyzed by the presence of degradation products.b. The oil is possibly experiencing some amount of dehydrogenation.
c. There is a very small amount of bulk polymerization taking place.
d. There is little reason to suspect that the oils suffered any significant amount of oxidation.
e. The approximate molecular weight range of fresh Caloria HT 43 is from 170 to 550.
Sufficient information is now available to enable design of a processor (fractional distillation column) to ostensibly prolong the usable lifetime of the oil.
Based upon the results of a fairly simplistic test run at Sandia, mechanical shear degradation due to pumping and fluid flow in general should not contribute significantly to fluid decomposition.
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