公开(公告)号：US11092393B1

公开(公告)日：2021-08-17

申请号：US16892897

申请日：2020-06-04

Applicant: ExxonMobil Research and Engineering Company

Inventor： Gary Christensen ,  Kevin J. Kelly ,  Shuji Luo ,  Heinrich R. Braun ,  Tobias Klande ,  Behrouz Engheta ,  Jorg F. W. Weber ,  Andrew E. Taggi

IPC: C09K5/10 ,  F28F23/00

Abstract: 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 (ρ), specific heat (cp), and dynamic viscosity (μ) properties. The heat transfer fluids have a normalized effectiveness factor (NEFfluid) as determined by the following equation: N ⁢ E ⁢ F fluid = D ⁢ E ⁢ F fluid D ⁢ E ⁢ F reference ; wherein DEFfluid is 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 DEFreference is a dimensional effectiveness factor for a reference fluid that is determined using the same equation designated in Table 1 for DEFfluid above for the same selected pump and the same selected heat transfer circuit dominant flow regime; and TABLE 1 (Heat Transfer Fluid and Reference Fluid) Selected Heat Transfer Circuit Flow Regime Selected Pump
Laminar
Transition (Blasius) Positive Displacement Pump
ρ1 cp1 μ−1
ρ0.25 cp1 μ−0.25 Centrifugal Pump
ρ0.19 cp1 μ−0.19
ρ0.04 cp1 μ−0.04 wherein the heat transfer fluid has a NEFfluid value 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.

公开(公告)号：US10712105B1

公开(公告)日：2020-07-14

申请号：US16447398

申请日：2019-06-20

Applicant: ExxonMobil Research and Engineering Company

Inventor： Gary Christensen ,  Kevin J. Kelly ,  Shuji Luo ,  Heinrich R. Braun ,  Tobias Klande ,  Behrouz Engheta ,  Jorg F. W. Weber ,  Andrew E. Taggi

IPC: C09K5/10 ,  F28F23/00

Abstract: 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 (ρ), specific heat (cp), and dynamic viscosity (μ) properties. The heat transfer fluids have a normalized effectiveness factor (NEFfluid) as determined by the following equation: N ⁢ E ⁢ F fluid = DEF fluid DEF reference ; wherein DEFfluid is 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 DEFreference is a dimensional effectiveness factor for a reference fluid that is determined using the same equation designated in Table 1 for DEFfluid above for the same selected pump and the same selected heat transfer circuit dominant flow regime; and TABLE 1 (Heat Transfer Fluid and Reference Fluid) Selected Heat Transfer Circuit Flow Regime Transition Selected PumpLaminar(Blasius) Positive Displacement Pumpρ1 cp1 μ−1ρ0.25 cp1 μ−0.25 Centrifugal Pumpρ0.19 cp1 μ−0.19ρ0.04 cp1 μ−0.04 wherein the heat transfer fluid has a NEFfluid value 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.