Heat transfer mediums

Patent metadata

Field	Value
Publication number	US-10330394-B2
Application number	US-201715625301-A
Country	US
Kind code	B2
Filing date	Jun 16, 2017
Priority date	Jun 16, 2017
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

The disclosure generally relates to compositions, methods, and systems for heat transfer and methods of preparing heat transfer mediums. In various embodiments are described heat transfer mediums comprising a plurality of microparticles suspended in a bulk material with each microparticle containing a phase change material. In other embodiments are described fluids comprising of a slurry of microparticles containing phase change fluid in a carrier liquid for a fast charger system.

First claim

What is claimed is:

1. A heat transfer system comprising:
a plurality of microparticles within a bulk material, where each microparticle has a shell enclosing a cavity having a pressure (P Internal ) independent of pressure outside the shell and including a phase change material having a boiling point temperature (T BP ) at P Internal ; and
first (HE 1 ) and second (HE 2 ) heat exchangers thermally connected to the plurality of microparticles;
wherein HE 1 is configured to heat the plurality of microparticles to at least T BP at P Internal to cause the microparticles to rise within the bulk material;
wherein HE 2 is configured to cool the plurality of microparticles to below T BP at P Internal to cause the microparticles to fall within the bulk material.

2. The heat transfer system of claim 1 , wherein the bulk material has a boiling point temperature that is greater than T BP .

3. The heat transfer system of claim 1 , wherein the microparticles within the bulk material is a non-settling slurry.

4. The heat transfer system of claim 1 , wherein the microparticles are at least 0.1 percent by weight of the microparticles within the bulk material.

5. The heat transfer system of claim 1 , wherein the cavity has a volume (V Cavity )and the phase change material as a liquid is about 0.1 percent to about 50 percent of V Cavity .

6. The heat transfer system of claim 1 , wherein the shell has a tensile strength or a Young's modulus of at least about 10 MPa (1450.38psi).

7. The heat transfer system of claim 1 , wherein the shell has a percent elongation of at least about 0.1.

8. The heat transfer system of claim 1 , wherein each microparticle has a density (D Gas ) when the phase change material is a gas and a density (D Liquid ) when the phase change material is a liquid and D Liquid is greater than D Gas .

9. The heat transfer system of claim 1 , wherein the microparticles have a mean diameter (MD( Gas ) when the phase change material is a gas and a mean diameter (MD Liquid ) when the phase change material is a liquid and MD Gas is greater than MD Liquid .

10. The heat transfer system of claim 1 , wherein the shell has a volume (V Shell ), the cavity has a volume (V Cavity ), and each microparticle have a V Cavity :V Shell ratio ranging from about 3:1 to about 200:1.

11. The heat transfer system of claim 1 , wherein the phase change material has a vapor pressure of about at least about 0.03169 Bar at about 25° C. (77° F.).

12. The heat transfer system of claim 1 , wherein the cavity has an internal pressure independent of pressure outside the shell.

13. The heat transfer system of claim 12 , wherein the internal pressure is different from the pressure outside of the shell.

14. The heat transfer system of claim 1 , wherein the bulk material has a melting point temperature (T MP1 ), the phase change material has a melting temperature (T MP2 ), and T MP1 is less than T MP2 .

Assignees

• Ford Global Tech Llc

Inventors

• Elie Larry Dean
• Gale Allan Roy

Classifications

• F28F23/02

  Arrangements for obtaining or maintaining same in a liquid state · CPC title

• C09K5/00

  Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion · CPC title

• F28D2021/008

  for vehicles · CPC title

• F28D20/026

  with different heat storage materials not coming into direct contact · CPC title

• F28F23/00

  Features relating to the use of intermediate heat-exchange materials, e.g. selection of compositions (heat-transfer, heat-exchange or heat-storage materials C09K5/00) · CPC title