FLUID-COOLED HEAT SHIELD AND SYSTEM
A fluid-cooled heat shield and closed loop system is provided to continuously transfer heat away from an object or area to be cooled. The system utilizes a coolant fluid that is pumped through the system by a circulating pump. Heat from a heat source is conveyed to a heat conductor shield and then to a heat sink and transferred by convection to the coolant fluid. The coolant fluid is pumped to a radiator where a fan is used to help transfer heat from the fluid and into the ambient air. The cooled water is then recirculated to the heat sink. The shields may be configured as mats and may be used flat or wrapped around an object to be cooled.
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This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/569,539, filed May 10, 2004, herein incorporated by reference.
FIELD OF THE INVENTIONThe present invention relates to specialized heat exchangers and, more particularly, to a fluid-cooled heat shield and system used to transfer heat from a first location to a second location and having applications particularly suited to vehicles and, in particular, endurance race cars.
BACKGROUND OF THE INVENTIONA serious problem for race car drivers is the heat that enters the cockpit through the footwell of the vehicle. The vehicle's exhaust collectors are typically located directly below the driver's footwell or floor pan such that the heat travels directly into the driver's cockpit. The elevated temperatures are such that many drivers have burned portions of their feet and especially their heels during the course of the race. In addition, the temperature of the cockpit increases to an intolerable and, possibly dangerous, level if it can distract the driver from the race.
Many prior art attempts have been made to try to lower the cockpit/footwell temperature, however, a suitable light-weight, effective, and low cost solution has yet to be found. One problem with the prior art has been that the hot areas or heat sources are merely shielded. Over a prolonged race, the heat merely builds up and overcomes or lessens the effectiveness of the shielding. One prior art shielding product boasts that their product has the ability to lower the floor pan temperature from 750° F. to 380° F. This lower temperature is still too hot and will burn the driver's feet over an extended race.
Accordingly, there is a need for a heat shield that is able to constantly remove the heat to the ambient environment without allowing a constant unrelieved heat build-up on the shield.
BRIEF SUMMARY OF THE INVENTIONThe present invention provides a fluid-cooled heat shield comprising a conductive sheet layer, a facing sheet layer positioned on a first side of the conductive sheet and adapted to protect the conductive sheet layer while allowing heat transfer through the facing sheet, an insulating sheet layer positioned on a second side of the conductive sheet and adapted to prevent heat transfer from the second side of the conductive sheet to the insulating sheet layer, a heat sink conductively attached to the conductive sheet layer and positioned between the facing sheet layer and the insulating sheet layer, wherein the heat sink comprises a fluid inlet, a fluid outlet, and a fluid passageway, wherein heat from the conductive sheet layer and the heat sink is transferred to a fluid traveling through the fluid passageway.
Another embodiment of the present invention provides a closed-loop heat removal system for an automotive vehicle comprising a fluid-cooled heat shield comprising a heat sink conductively attached to a conductive sheet layer positioned between an insulating sheet layer and a facing sheet layer, a radiator, and a fluid pump adapted to move a heated fluid from the fluid-cooled heat shield to the radiator where the fluid is cooled.
The present invention provides a method of removing heat from a portion of a vehicle comprising the steps of providing a fluid-cooled heat shield comprising a heat sink conductively attached to a conductive sheet layer positioned between an insulating sheet layer and a facing sheet layer; positioning the facing sheet layer of the fluid-cooled heat shield toward a source of heat of the vehicle; pumping a fluid through the heat sink wherein heat from the conductive sheet layer and the heat sink is transferred to the fluid; and pumping the fluid through a radiator wherein the heat is transferred from the fluid to an ambient air.
These and other advantages will be apparent by reviewing the following specification and drawings.
BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS
Referring now to
A series of different sized, fluid-cooled heat shields 10 are shown in
A second embodiment of the heat sink 20′ of the present invention is shown in
It is contemplated that the fluid-cooled heat shield 10 is used as part of a closed loop cooling system 110 as shown in
It is contemplated that innumerable changes could be made to the configuration of the embodiments shown without departing from the intended scope of the invention. For example, different fluid passageways could be provided, multiple conductive shields could be employed with the heat sink, etc. The copper foil heat shield could be used with a conventional type of metal of any other prior art material that might increase the performance of the shield. Although the present invention has been described above in detail, the same is by way of illustration and example only and is not to be taken as a limitation on the present invention.
Claims
1. A fluid-cooled heat shield comprising:
- a conductive sheet layer;
- a facing sheet layer positioned on a first side of the conductive sheet and adapted to protect the conductive sheet layer while allowing heat transfer through the facing sheet;
- an insulating sheet layer positioned on a second side of the conductive sheet and adapted to prevent heat transfer from the second side of the conductive sheet to the insulating sheet layer;
- a heat sink conductively attached to the conductive sheet layer and positioned between the facing sheet layer and the insulating sheet layer;
- wherein the heat sink comprises a fluid inlet, a fluid outlet, and a fluid passageway, wherein heat from the conductive sheet layer and the heat sink is transferred to a fluid traveling through the fluid passageway.
2. The fluid-cooled heat shield of claim 1 further comprising an outer protective sheet layer positioned on a side of the insulating layer opposite the conductive sheet layer.
3. The fluid-cooled heat shield of claim 1, wherein the conductive sheet layer is a thin foil made of a conductive metallic material.
4. The fluid-cooled heat shield of claim 1, wherein the conductive sheet layer is at least partially copper or aluminum.
5. The fluid-cooled heat shield of claim 1, wherein the heat sink is made of a conductive metallic material.
6. The fluid-cooled heat shield of claim 1, wherein the insulating sheet layer is a high temperature silica or fiberglass felt.
7. The fluid-cooled heat shield of claim 2, wherein the outer protective sheet layer is made of an aluminum foil fiberglass lamination.
8. The fluid-cooled heat shield of claim 1, wherein the protective facing is a Mylar fiberglass laminate.
9. The fluid-cooled heat shield of claim 1, wherein the fluid passageway of the heat sink is “U” shaped or in the form of a grid.
10. The fluid-cooled heat shield of claim 1 further comprising at least one fastening aperture through at least the facing sheet layer and the insulating layer.
11. A closed-loop heat removal system for an automotive vehicle comprising:
- a fluid-cooled heat shield comprising a heat sink conductively attached to a conductive sheet layer positioned between an insulating sheet layer and a facing sheet layer;
- a radiator; and
- a fluid pump adapted to move a heated fluid from the fluid-cooled heat shield to the radiator where the fluid is cooled.
12. The closed-loop heat removal system of claim 11 further comprising an expansion tank for allowing the thermal expansion of the heated fluid.
13. The closed-loop heat removal system of claim 11, wherein the radiator further comprises a fan.
14. The closed-loop heat removal system of claim 11 wherein the fluid-cooled heat shield is positioned in a footwell of the automotive vehicle.
15. The closed-loop heat removal system of claim 11, wherein the radiator is positioned in the vehicle at a location open to ambient air.
16. The closed-loop heat removal system of claim 11, wherein the fluid-cooled heat shield further comprises an outer protective sheet layer positioned on a side of the insulating layer opposite the conductive sheet layer.
17. The closed-loop heat removal system of claim 11, wherein the fluid is water.
18. A method of removing heat from a portion of a vehicle comprising the steps of:
- providing a fluid-cooled heat shield comprising a heat sink conductively attached to a conductive sheet layer positioned between an insulating sheet layer and a facing sheet layer;
- positioning the facing sheet layer of the fluid-cooled heat shield toward a source of heat of the vehicle;
- pumping a fluid through the heat sink wherein heat from the conductive sheet layer and the heat sink is transferred to the fluid; and
- pumping the fluid through a radiator wherein the heat is transferred from the fluid to an ambient air.
19. The method of claim 18, further comprising the steps of:
- providing a fluid thermal expansion tank; and
- allowing the fluid to expand in the thermal expansion tank as needed.
20. The method of claim 18, further comprising the steps of:
- providing a fan associated with the radiator; and
- activating the fan to cause air flow through the radiator to transfer heat from the fluid to the air.
Type: Application
Filed: May 10, 2005
Publication Date: Nov 24, 2005
Applicant: THERMO-TEC HIGH PERFORMANCE AUTOMOTIVE, INC. (Greenwich, OH)
Inventor: James White (Greenwich, OH)
Application Number: 10/908,381