Elastomer bed

• US 5,465,781 A
• Filed: 04/12/1994
• Issued: 11/14/1995
• Est. Priority Date: 10/29/1992
• Status: Expired due to Fees

• Current Assignee: Elastek Incorporated
• Original Assignee: Elastek Incorporated
• Inventors: DeGregoria, Anthony J.
• Primary Examiner(s): Rivell, John
• Assistant Examiner(s): ATKINSON, CHRISTOPHER MARK
• Application Number:
  US08/226,479
• Time in Patent Office: 581 Days
• Field of Search: 165/4, 165/8, 165/10, 165/54, 165/909, 62/56, 62/467
• US Class Current: 165/8
• CPC Class Codes: A62B 9/003 Means for influencing the temperature or humidity of the breathing gas
• CPC Class Codes: F24F 12/00 Use of energy recovery systems in air conditioning, ventilation or screening with both heat and humidity transfer between supplied and exhausted air F24F3/147
• CPC Class Codes: F24F 2003/1458 using regenerators
• CPC Class Codes: F24F 2203/1036 Details
• CPC Class Codes: F24F 2203/104 Heat exchanger wheel
• CPC Class Codes: F24F 2203/1048 Geometric details
• CPC Class Codes: F24F 2203/1068 comprising one rotor
• CPC Class Codes: F24F 2203/1084 comprising two flow rotor segments
• CPC Class Codes: F24F 3/1423 with a moving bed of solid desiccants, e.g. a rotary wheel supporting solid desiccants
• CPC Class Codes: F25B 23/00 Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
• CPC Class Codes: F28D 17/00 Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
• CPC Class Codes: F28D 19/00 Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium F28D15/02 takes precedence
• CPC Class Codes: F28F 21/065 the heat-exchange apparatus employing plate-like or laminated conduits

Abstract

A high performance, low cost, regenerator/heat exchanger matrix or bed. The bed consists of numerous stretched elastomer sheets separated by spacers and stacked. The resulting matrix is of the parallel plate type with high porosity, and narrow, uniform, unobstructed channels. The bed is ideal for near room temperature regenerator applications. The bed may also be used to pump heat or refrigerate, when fitted with a mechanism which allows the stretch of the elastomer sheets to be rapidly increased and decreased periodically.

Claims

1. A method of refrigeration of the type employing a elastomeric element, a regenerator and a single-phase heat transfer fluid at temperatures T_C and T_H, respectively, the method comprising:

(a) stretching the elastomeric element to increase the average temperature of the element by Δ

T;

(b) flowing the fluid at a temperature substantially T_C through the element so that the fluid flows out of the element at about T_H +Δ

T,

(c) contracting the element to decrease the average temperature of the element by Δ

T,

(d) flowing the fluid through the element in the reverse direction at T_H so that the fluid flows out of the element at about T_C -Δ

T, and

(e) transferring heat from the emerging fluid during steps (b) and transferring heat to the emerging fluid during step (d) to objects to be temperature affected thereby.

2. A method of refrigeration of the type employing a elastomeric element, a regenerator and a single-phase heat transfer fluid at temperatures T_C and T_H, respectively, the method comprising:

(a) stretching the elastomeric element to increase the average temperature of the element by Δ

T;

(b) flowing the fluid at a temperature substantially T_C through the element so that the fluid flows out of the element at about T_H +Δ

T;

(c) contracting the element to decrease the average temperature of the element by Δ

T;

(d) flowing the fluid through the element in the reverse direction at T_H so that the fluid flows out of the element at about T_C -Δ

T; and

.

(e) transferring heat from the emerging fluid during steps (b) and transferring heat to the emerging fluid during step (d) to objects to be temperature affected thereby,

wherein said elastomeric element comprises (i) parallel layers of stretched thermoelastic sheets, each said layer being generally rectangular and having a layer length dimension, each said sheet having an unstretched sheet length less than said layer length dimension;

(ii) spacers between said sheets defining substantially parallel fluid flow channels therebetween, each said channel having a first rectangular face adjacent a first layer and a second rectangular face adjacent a second opposite layer;

(iii) locking means for locking said sheets and spacers together;

wherein step (b) includes directing said fluid through said flow channels and over said sheets, said fluid having a first temperature when incident upon said flow channels and sheets, and a second temperature upon exiting from said flow channels; and

wherein step (c) includes changing in stretch said sheets between a higher state of stretch and a lower state of stretch whereby said fluid first temperature is changed to said second temperature by forcing said fluid over said sheets.

3. A refrigeration apparatus, comprising:

(a) a porous matrix including an elastomer element;

(b) means for changing the temperature of said porous matrix by stretching or contracting said elastomer element;

(c) a circulator for passing a heat transfer fluid through said porous matrix in a first direction when said porous matrix is at one temperature and in a reverse direction through said porous matrix when said porous matrix is at another temperature; and

(d) heat exchanger means for receiving said fluid from both directions from said porous matrix and for circulating the fluid through an object to be temperature affected thereby.

4. The apparatus of claim 3, wherein said elastomer element comprises (i) parallel layers of stretched thermoelastic sheets, each said layer being generally rectangular and having a layer length dimension, each said sheet having an unstretched sheet length less than said layer length dimension;

(ii) spacers between said sheets defining substantially parallel fluid flow channels therebetween, each said channel having a first rectangular face adjacent a first layer and a second rectangular face adjacent a second opposite layer; and

(iii) locking means for locking said sheets and spacers together;

wherein said fluid is directable through said flow channels and over said sheets, said fluid having a first temperature when incident upon said flow channels and sheets, and a second temperature upon exiting from said flow channels; and

wherein said sheets exhibit a change in stretch between a state of higher stretch and a state of lower stretch and said fluid first temperature is changed to said second temperature by forcing said fluid over said sheets.

5. The apparatus of claim 4, wherein a plurality of said porous are disposed radially about a wheel hub forming a wheel.

6. The apparatus of claim 4, wherein each said layer is rectangular.

7. The apparatus of claim 4, wherein each said layer is trapezoidal.

8. The apparatus of claim 5, wherein said wheel includes eccentricity means for stretching and contracting the elements of said porous.

9. The apparatus of claim 5, wherein said heat exchanger means includes a hot heat exchanger proximate one side of said wheel and a cold heat exchanger proximate the other side of said wheel.

10. A refrigeration apparatus, comprising:

a reciprocating elastomer bed, a reciprocating bed drive, a circulator and a heat exchanger;

said reciprocating elastomer bed including a first and a second elastomeric element, each said elastomeric element including (i) parallel layers of stretched thermoelastic sheets, (ii) spacers between said sheets defining substantially parallel fluid flow channels therebetween, (iii) locking means for locking said sheets and spacers together, and (iv) a heat transfer fluid directable through said flow channels and over said sheets;

each said layer being generally rectangular and having a layer length dimension;

said sheets changeable in stretch between a state of higher stretch and a state of lower stretch, each said sheet having an unstretched sheet length less than said layer length dimension;

each said channel having a first rectangular face adjacent a first layer and a second rectangular face adjacent a second opposite layer;

said heat transfer fluid having a first temperature when incident upon said flow channels and sheets, and a second temperature upon exiting from said flow channels;

said first elastomeric element having a common locking means between said first elastomeric element and said second elastomeric element, and said first and second elastomeric elements each having a noncommon locking means;

said reciprocating bed drive attached to said noncommon locking means of said first elastomeric element and to said noncommon locking means of said second elastomeric element, and reciprocatable in a first direction to stretch said first elastomeric element and to relax said second elastomeric element and in an opposite direction to relax said first elastomeric element and to stretch said second elastomeric element, each elastomeric element being cooled as it is relaxed and warmed as it is stretched;

said circulator for passing a heat transfer fluid through said bed in a first direction when said bed is at one temperature and in an opposite direction through said bed when said bed is at a different temperature;

said heat exchanger means for receiving said fluid from both directions from said bed and for circulating the fluid through an object to be temperature affected thereby.

11. The apparatus of claim 10 wherein a said relaxing and stretching of said first and second elastomeric elements creates a temperature span of about two to three times an adiabatic temperature span of a sheet material of said thermoelastic sheets.

12. The apparatus of claim 11 wherein said sheet material is rubber.

13. The apparatus of claim 10 wherein said relaxing and stretching of said first and second elastometric elements creates a temperature span of at least 10 times an adiabatic temperature span of a sheet material of said thermoelastic sheets.

14. A method of pumping heat of the type employing a elastomeric element and a single-phase heat transfer fluid at temperatures T_C and T_H, respectively, the method comprising:

(a) stretching the elastomeric element to increase the average temperature of the element by Δ

T;

(b) flowing the fluid at a temperature substantially T_C through the element so that the fluid flows out of the element at about T_H +Δ

T;

(c) contracting the element to decrease the average temperature of the element by Δ

T; and

(d) flowing the fluid through the element in the reverse direction at T_H so that the fluid flows out of the element at about T_C -Δ

T;

wherein said elastomeric element comprises (i) parallel layers of stretched thermoelastic sheets, each said layer being generally rectangular and having a layer length dimension, each said sheet having an unstretched sheet length less than said layer length dimension;

(ii) spacers between said sheets defining substantially parallel fluid flow channels therebetween, each said channel having a first rectangular face adjacent a first layer and a second rectangular face adjacent a second opposite layer;

(iii) locking means for locking said sheets and spacers together;

wherein step (b) includes directing said fluid through said flow channels and over said sheets, said fluid having a first temperature when incident upon said flow channels and sheets, and a second temperature upon exiting from said flow channels; and

wherein step (c) includes changing in stretch said sheets between a higher state of stretch and a lower state of stretch whereby said fluid first temperature is changed to said second temperature by forcing said fluid over said sheets.

15. A heat pump apparatus, comprising:

(a) a porous matrix including an elastomer element;

(b) means for changing the temperature of said porous matrix by stretching or contracting said elastomer element;

(c) a circulator for passing a heat transfer fluid through said porous matrix in a first direction when said porous matrix is at one temperature and in a reverse direction through said porous matrix when said porous matrix is at another temperature;

wherein said elastomer element comprises (i) parallel layers of stretched thermoelastic sheets, each said layer being generally rectangular and having a layer length dimension, each said sheet having an unstretched sheet length less than said layer length dimension;

(ii) spacers between said sheets defining substantially parallel fluid flow channels therebetween, each said channel having a first rectangular face adjacent a first layer and a second rectangular face adjacent a second opposite layer; and

(iii) locking means for locking said sheets and spacers together;

wherein said fluid is directable through said flow channels and over said sheets, said fluid having a first temperature when incident upon said flow channels and sheets, and a second temperature upon exiting from said flow channels; and

wherein said sheets exhibit a change in stretch between a state of higher stretch and a state of lower stretch and said fluid first temperature is changed to said second temperature by forcing said fluid over said sheets.

16. The apparatus of claim 15, wherein a plurality of said porous matrices are disposed radially about a wheel hub forming a wheel.

17. The apparatus of claim 15, wherein each said layer is rectangular.

18. The apparatus of claim 16, wherein said wheel includes eccentricity means for stretching and contracting the elements of said porous matrices.