Compact heat exchanger with high volumetric air-flow

• US 7,255,156 B2
• Filed: 07/20/2004
• Issued: 08/14/2007
• Est. Priority Date: 08/02/2002
• Status: Expired due to Fees

• Current Assignee: Powercold Corporation
• Original Assignee: Powercold Corporation
• Inventors: Calton, Dean, Mark, Henry
• Primary Examiner(s): Flanigan; Allen J.
• Application Number:
  US10/894,715
• Publication Number:
  US 20050039892A1
• Time in Patent Office: 1,120 Days
• Field of Search: 165/67, 165/115, 165/117, 165/162, 165/163
• US Class Current: 165/115
• CPC Class Codes: F25B 2339/041 of evaporative condensers
• CPC Class Codes: F25B 39/04 Condensers
• CPC Class Codes: F28D 1/0472 the conduits being helically or spirally coiled
• CPC Class Codes: F28D 5/02 in which the evaporating medium flows in a continuous film or trickles freely over the conduits
• CPC Class Codes: F28F 9/0132 formed by slats, tie-rods, articulated or expandable rods

Abstract

A heat exchanger including a housing having a base and defining an interior. A plurality of coils are located in the interior of the housing and are arranged to extend upwardly from the base to define a coil depth. A blower is adapted to move air through the plurality of coils in a direction of the coil depth. A water distribution system is preferably located around a circumferential periphery of the plurality of coils to spray water on an outer surface of the plurality of coils along substantially the entire coil depth thereof. At least one air inlet opening is located in the housing to allow airflow across the plurality of coils. Additional embodiments of improved heat exchangers are disclosed herein.

Claims

1. A heat exchanger comprising:

a housing having a base and defining an interior;

a plurality of coils located in the interior of the housing and arranged to extend upwardly from the base to define a coil depth;

a blower adapted to move air through the plurality of coils in a direction of the coil depth;

a water distribution system to spray water onto the plurality of coils, wherein the water distribution system is located around a circumferential periphery of the plurality of coils to spray water on an outer surface of the plurality of coils along the entire coil depth thereof;

at least one air inlet opening located in the housing to allow airflow across the plurality of coils;

a coil alignment mechanism located on the base for positioning the plurality of coils thereon, the number of the plurality of coils being adjustable so that a desired amount of cooling is provided by the heat exchanger; and

the coil alignment mechanism comprises a plurality of posts which extend generally upwardly from the base, and each of the plurality of coils is connected to the plurality of posts using a sliding engagement.

2. The heat exchanger of claim 1, wherein the plurality of coils comprise stacked spiral coils.

3. The heat exchanger of claim 1, wherein the number of the plurality of coils can be adjusted retroactively after the heat exchanger has been assembled without changing a size of the housing.

4. The heat exchanger of claim 3, wherein the number of plurality of coils is increased due to the addition of coils forming an additional cooling circuit.

5. The heat exchanger of claim 2, wherein the plurality of coils comprises at least two cooling circuits.

6. The heat exchanger of claim 1, wherein the base comprises fork lift support rails.

9. The heat exchanger of claim 1, wherein the housing includes a moisture recovery device which generally prevents water from being blown out of the housing.

7. A heat exchanger comprising:

a housing having a base and defining an interior;

a plurality of coils located in the interior of the housing and arranged to extend upwardly from the base to define a coil depth;

a blower adapted to move air through the plurality of coils in a direction of the coil depth;

a water distribution system to spray water onto the plurality of coils, wherein the water distribution system is located around a circumferential neither of the plurality of coils to spray water on an outer surface of the plurality of coils along the entire coil depth thereof;

at least one air inlet opening located in the housing to allow airflow across the plurality of coils;

a coil alignment mechanism located on the base for positioning the plurality of coils thereon, the number of the plurality of coils being adjustable so that a desired amount of cooling is provided by the heat exchanger; and

the plurality of coils include at least one coil having a different diameter and/or a different spacing between vertically adjacent coils than the remaining coils.

8. A heat exchanger comprising:

a housing having a base and defining an interior;

a plurality of coils located in the interior of the housing and arranged to extend upwardly from the base to define a coil depth;

a blower adapted to move air through the plurality of coils in a direction of the coil depth;

a water distribution system to spray water onto the plurality of coils, wherein the water distribution system is located around a circumferential periphery of the plurality of coils to spray water on an outer surface of the plurality of coils along the entire coil depth thereof;

at least one air inlet opening located in the housing to allow airflow across the plurality of coils;

a coil alignment mechanism located on the base for positioning the plurality of coils thereon, the number of the plurality of coils being adjustable so that a desired amount of cooling is provided by the heat exchanger; and

the housing comprises inner and outer sidewalls that define a passage therebetween.

10. A heat exchanger comprising:

a housing having a base and defining an interior;

a plurality of coils located in the interior of the housing and arranged to extend upwardly from the base to define a coil depth;

a blower adapted to move air through the plurality of coils in a direction of the coil depth;

a water distribution system to spray water onto the plurality of coils, wherein the water distribution system is located around a circumferential periphery of the plurality of coils to spray water on an outer surface of the plurality of coils along the entire coil depth thereof; and

a plurality of air inlet openings located in the housing at various locations to allow ambient air to contact the plurality of coils generally along the entire coil depth to reduce an airflow pressure drop of the heat exchanger; and

the plurality of coils include at least one coil having a different diameter and/or a different spacing between vertically adjacent coils than the remaining coils.

11. The heat exchanger of claim 10, wherein the plurality of coils comprise stacked spiral coils.

12. The heat exchanger of claim 10, wherein each of the plurality of coils is positioned within the housing by a plurality of posts which extend generally upwardly from the base such that a weight of the plurality of coils is supported by the substantially entirely by the base of the housing.

13. The heat exchanger of claim 12, wherein each of the plurality of coils is located on a framework that engages at least one of the plurality of posts.

14. The heat exchanger of claim 10, wherein the plurality of coils comprises at least two cooling circuits.

15. The heat exchanger of claim 10, wherein the base comprises fork lift support rails.

16. The heat exchanger of claim 14, wherein the housing comprises inner and outer sidewalls that define a passage therebetween.

17. The heat exchanger of claim 10, wherein the housing includes a moisture recovery device which generally prevents water from being blown out of the housing.