Chemical base for fuel cell engine heat exchange coolant/antifreeze comprising 1,3-propanediol
AssigneeShell Oil Company
InventorsEdward Raynes Eaton, Wyndham Henry Boon, Christopher John Smith
Life of this patent
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Abstract
A nontoxic fuel cell engine coolant which has an electrical resistivity of greater than 250 kOhm-cm, a boiling point of greater than 90° C., a freezing point of less than −40° C., a thermal conductivity of greater than 0.4 W/m-k, a viscosity of less than 1 cPs at 80° C., a viscosity of less than 6 cPs at 0°C., a heat capacity of greater than 3 kJ/kg-K, and which is compatible with current cooling system materials.
Claims4
A nontoxic fuel cell engine coolant which is comprised of an aqueous 1,3-propanediol and which has an electrical resistivity of greater than 250 Kohm-cm, a boiling point of greater than 90° C., a thermal conductivity of greater than 0.4 W/m-k, a viscosity of less than 1 cPs at 80° C. and less than 6 cPs at 0° C., a heat capacity of greater than 3 kJ/kg-K, and having a corrosion of aluminum heat rejecting surface capacity as measured by ASTM D-4340 of less than 0.1 mg/cm2/week.
Dependencies are inferred from the claim text.