Method and apparatus for thermally protecting and/or transporting temperature sensitive products
Method and apparatus for thermally protecting a product, when storing and/or shipping a product, to control temperatures products are exposed to. Embodiments increase the amount of time portions of the product experience a desired temperature range and/or reduce the amount of time portions of the product experience temperatures outside a desired temperature range and/or experience an undesirable temperature range. Embodiments incorporate thermally conductive materials, referred to as conductive equalizers, positioned around and/or near the product positioned inside a packaging container, where the conductive materials conduct heat from locations in the package interior to other locations in the package interior. The conductive equalizers conductively transfer heat from hotter portions of the interior of the container to cooler portions of the interior of the container and/or from portions of the interior desired to be cooled to the cold bank, resulting in a more uniform temperature distribution around the product.
1. An apparatus for thermally protecting a load, comprising:
a container, wherein the container is configured to position the load within an interior of the container;
a thermal bank, wherein the thermal bank is configured to absorb heat from a source above an operating temperature of the thermal bank;
a conductive equalizer, wherein at least a portion of the conductive equalizer has a thermal conductivity of at least 10 W/m-K;
direct thermal conductively connecting the conductive equalizer to the thermal bank, wherein the thermal bank is configured to absorb heat from the conductive equalizer or provide heat to the conductive equalizer, wherein when the load is positioned within the container and the conductive equalizer is positioned proximate the load, the period of time the load is maintained in a desired temperature range is extended,
wherein the conductive equalizer comprises a sheet of material having a thermal conductivity, TC, wherein the sheet of material has a length, L, from a proximal end of the sheet directly thermally conductively connected to the conductive equalizer to a distal end of the sheet, a thickness T, and a width w, wherein L is in the range 0.05 m and 2 m, wherein T is greater than or equal to 0.000001 m, wherein T/L is in the range 0.0002 and 0.000005, wherein the sheet has an effective thermal conductance from the distal end to the proximal end equal to TC×w×T/L.
2. The apparatus according to claim 1 , wherein the conductive equalizer comprises a material or multiple materials that allow heat to move from a first position in an interior of the container that has a high temperature to a second position in the interior of the container that has a lower temperature.
3. The apparatus according to claim 1 , wherein the conductive equalizer extends the period of time the payload is maintained in a desired temperature range by conducting heat from the location the conductive equalizer is positioned to the thermal bank.
4. The apparatus according to claim 1 , wherein the conductive equalizer comprises at least one part comprising one or more materials having a thermal conductivity in a range from 10 to 500 W/m-K.
5. The apparatus according to claim 1 , wherein the conductive equalizer covers at least 10% of a load exposed surface.
6. The apparatus according to claim 1 , wherein the conductive equalizer increases a surface area that is in direct thermal conductive contact with the thermal bank.
7. The apparatus according to claim 1 , wherein the conductive equalizer extends the period of time the load is maintained in a desired temperature range by conducting heat from the thermal bank toward the location the conductive equalizer is positioned.
8. The apparatus according to claim 1 , wherein the conductive equalizer extremities are away from the thermal bank from 50 mm to 2000 mm.
9. The apparatus according to claim 1 , wherein the conductive equalizer is flexible.
10. The apparatus according to claim 1 , wherein the conductive equalizer is semi-rigid.
11. The apparatus according to claim 1 , wherein the conductive equalizer is rigid.
12. The apparatus according to claim 1 , wherein the conductive equalizer has a thickness greater than or equal to 0.01 mm.
13. The apparatus according to claim 1 , wherein the conductive equalizer comprises an insulation material on one or both surfaces of the conductive equalizer.
14. The apparatus according to claim 1 , wherein the conductive equalizer comprises a plurality of thermal conductive materials.
15. The apparatus according to claim 1 , wherein positioning the conductive equalizer around at least a portion of the load comprises positioning the conductive equalizer on one side of the load.
16. The apparatus according to claim 1 , wherein positioning the conductive equalizer around at least a portion of the load comprises positioning the conductive equalizer on all sides of the payload.
17. The apparatus according to claim 1 , further comprising positioning at least one additional conductive equalizer around a corresponding at least one additional portion of the load, wherein at least a portion of each at least one additional conductive equalizer has a thermal conductivity of at least 10 W/m-K.
18. The apparatus according to claim 1 ,
wherein the effective thermal conductance is at least 0.003 W/K, where W is watts and K is degrees Kelvin.
19. An apparatus for thermally protecting a load, comprising:
a container, wherein the container is configured to position the load within an interior of the container;
a thermal bank, wherein the thermal bank is configured to absorb heat from a source above an operating temperature of the thermal bank;
a conductive equalizer, wherein at least a portion of the conductive equalizer has a thermal conductivity of at least 10 W/m-K;
direct thermal conductively connecting the conductive equalizer to the thermal bank, wherein the thermal bank is configured to absorb heat from the conductive equalizer or provide heat to the conductive equalizer, wherein when the load is positioned within the container and the conductive equalizer is positioned proximate the load, the period of time the load is maintained in a desired temperature range is extended,
wherein the conductive equalizer comprises a sheet of material having a thermal conductivity, TC, wherein the sheet of material has a length, L, from a proximal end of the sheet directly thermally conductively connected to the conductive equalizer to a distal end of the sheet, a thickness T, and a width w,
wherein the sheet has an effective thermal conductance from the distal end to the proximal end equal to TC×w×T/L,
wherein the effective thermal conductance is at least 0.003 W/K, where W is watts and K is degrees Kelvin.
20. A method of thermally protecting a load, comprising:
positioning the load within an interior of a container;
positioning a conductive equalizer proximate to at least a portion of the load, wherein at least a portion of the conductive equalizer has a thermal conductivity of at least 10 W/m-K, wherein positioning the conductive equalizer proximate the at least a portion of the load comprises positioning the conductive equalizer inside the container,
direct thermal conductively connecting the conductive equalizer to a thermal bank, wherein the thermal bank is positioned within the interior of the container, wherein the thermal bank can absorb heat from the conductive equalizer or provide heat to the conductive equalizer, wherein the conductive equalizer extends the period of time the load is maintained in a desired temperature range,
wherein the conductive equalizer comprises a sheet of material having a thermal conductivity, TC, wherein the sheet of material has a length, L, from a proximal end of the sheet directly thermally conductively connected to the conductive equalizer to a distal end of the sheet, a thickness T, and a width w, wherein L is in the range 0.05 m and 2 m, wherein T is greater than or equal to 0.000001 m, wherein T/L is in the range 0.0002 and 0.000005, wherein the sheet has an effective thermal conductance from the distal end to the proximal end equal to TC×w×T/L.