Exxonmobil Research and Engineering Company

Behrouz Engheta

Andrew Edmund Taggi

Shuji Luo

Kevin John Kelly

Gary Christensen

Heinrich R Braun

Tobias Klande

This disclosure relates to heat transfer fluids for use in heat transfer systems. The heat transfer fluids comprise at least one non-aqueous dielectric heat transfer fluid. The non-aqueous dielectric heat transfer fluid has density (&#x3c1;), specific heat (c), and dynamic viscosity (&#x3bc;) properties. The heat transfer fluids have a normalized effectiveness factor (NEF) as determined by the following equation: wherein DEFis a dimensional effectiveness factor for the heat transfer fluid that is determined based on an equation designated in Table 1 below for a selected pump and a selected heat transfer circuit dominant flow regime; wherein DEFis a dimensional effectiveness factor for a reference fluid that is determined using the same equation designated in Table 1 for DEFabove for the same selected pump and the same selected heat transfer circuit dominant flow regime; and wherein the heat transfer fluid has a NEFvalue equal to or greater than 1.0. This disclosure also provides a method for improving performance of a heat transfer system, a method for improving performance of an apparatus, and a method for selecting a heat transfer fluid for use in a heat transfer system. The heat transfer fluids and methods of this disclosure are applicable in situations where the heat transfer system is dominated by heat conveyance.

Heat transfer fluids and methods of use

This disclosure relates to heat transfer fluids for use in heat transfer systems. The heat transfer fluids comprise at least one non-aqueous dielectric heat transfer fluid. The non-aqueous dielectric heat transfer fluid has density (&#x3c1;), specific heat (c), and dynamic viscosity (&#x3bc;) properties. The heat transfer fluids have a normalized effectiveness factor (NEF) as determined by the following equation:  wherein DEFis a dimensional effectiveness factor for the heat transfer fluid that is determined based on an equation designated in Table 1 below for a selected pump and a selected heat transfer circuit dominant flow regime; wherein DEFis a dimensional effectiveness factor for a reference fluid that is determined using the same equation designated in Table 1 for DEFabove for the same selected pump and the same selected heat transfer circuit dominant flow regime; and wherein the heat transfer fluid has a NEFvalue equal to or greater than 1.0. This disclosure also provides a method for improving performance of a heat transfer system, a method for improving performance of an apparatus, and a method for selecting a heat transfer fluid for use in a heat transfer system. The heat transfer fluids and methods of this disclosure are applicable in situations where the heat transfer system is dominated by heat conveyance.

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Hamburg, Germany

Behrouz Engheta