Davey Joe Vadder

US Patent:

8049522, Nov 1, 2011

Filed:

Aug 26, 2008

Appl. No.:

12/198504

Inventors:

Davey Joe Vadder - Manchester MD, US
Jeffrey Michael Kane - Biglerville PA, US
Arthur James Marshall - Thomasville PA, US

Assignee:

Evapco, Inc. - Westminster MD

International Classification:

G01R 27/08

US Classification:

324699, 62139, 62 59, 62130, 248 741

Abstract:

An ice thickness probe includes a longitudinally-extending probe rod, an insulator casing and a sleeve. The probe rod is fabricated from an electrically-conductive material. The insulator casing is fabricated from an electrically-insulative material and is wrapped around, is in contact with and extends along the probe rod. The sleeve is fabricated from a stiff yet resilient material and is wrapped around, is in contact with and extends along the insulator casing. The insulator casing and the sleeve are concentrically disposed about the probe rod as viewed in cross-section. An ice thickness probe assembly includes a frame structure, a reference bar and at least one ice thickness probe. An ice thickness monitoring apparatus is used in a thermal storage coil having a tank containing water and a tube disposed in the water so that, when the thermal ice storage coil is energized, ice is produced and accumulates on the tube.

US Patent:

20070221365, Sep 27, 2007

Filed:

Mar 24, 2006

Appl. No.:

11/387786

Inventors:

Dennis Martin - East Berlin PA, US
Davey Vadder - Westminster MD, US

International Classification:

F28D 1/047

US Classification:

165150000, 029890053

Abstract:

A heat exchanger tube includes a tube body that forms a hollow passageway and has a U-shaped tube section defining a return bend and a pair of straight tube sections. Respective ones of the straight tube sections are connected to the U-shaped section at respective connection locations and extend generally parallel to one another to define an internal space disposed between and among the U-shaped tube section and the straight tube sections connected to the U-shaped tube section. The U-shaped tube section has a concavity formed thereinto with the concavity defining a portion of the internal space. A heat exchanger serpentine tube includes a plurality of straight tube sections arranged in a plurality of generally parallel rows and disposed in a common plane and a plurality of U-shaped tube sections connected to the plurality of straight tube sections to form a serpentine configuration.

US Patent:

20110100593, May 5, 2011

Filed:

Oct 19, 2010

Appl. No.:

12/907162

Inventors:

Steven M. BENZ - Laurel MD, US
Trevor H. HEGG - Westminster MD, US
Davey Joe VADDER - Manchester MD, US

Assignee:

EVAPCO, INC. - Taneytown MD

International Classification:

F24F 7/007
F24F 3/14

US Classification:

165 59, 165 60

Abstract:

A hybrid heat exchange apparatus for indirectly transferring heat between a process fluid and ambient air includes an evaporative heat transfer cell operative in a wet mode or a dry mode, a dry heat transfer cell and a fan. The air may bypass the dry heat transfer cell to flow through a first air passage or may flow through a second air passage through the dry heat transfer cell and in either event, then through the evaporative heat transfer cell. The air may partially flow through and partially bypass the dry heat transfer cell, and then through the evaporative heat transfer cell. The evaporative heat transfer cell optionally may include a direct contact evaporative heat exchanger. Manually or automatically controlling air flow based on ambient conditions provides efficient and economical control of the hybrid heat exchange apparatus, while avoiding problems in freezing conditions.

US Patent:

20120012292, Jan 19, 2012

Filed:

Jul 16, 2010

Appl. No.:

12/838003

Inventors:

Davey Joe VADDER - Manchester MD, US

Assignee:

EVAPCO, INC. - Taneytown MD

International Classification:

F28F 9/02

US Classification:

165174

Abstract:

An improved finned coil tube assembly enhances evaporative heat exchanger performance, and includes tubes, preferably serpentine tubes, in the coil assembly. The tubes have a generally elliptical cross-section with external fins formed on an outer surface of the tubes. The fins are spaced substantially 1.5 to substantially 3.5 fins per inch (2.54 cm) along the longitudinal axis of the tubes, extend substantially 23.8% to substantially 36% of the nominal tube outside diameter in height from the tubes outer surface and have a thickness of substantially 0.007 inch (0.018 cm) to substantially 0.020 inch (0.051 cm). The tubes have a center-to-center spacing generally horizontally and normal to the longitudinal axis of the tubes of substantially 109% to substantially 125% of the nominal tube outside diameter, and a generally vertical center-to-center spacing of substantially 100% to about 131% of the nominal tube outside diameter.

US Patent:

20120061055, Mar 15, 2012

Filed:

Oct 18, 2010

Appl. No.:

12/906674

Inventors:

Davey J. Vadder - Westminster MD, US

Assignee:

EVAPCO, INC. - Taneytown MD

International Classification:

F28D 15/00

US Classification:

16510413

Abstract:

A hybrid heat exchanger apparatus includes a direct heat exchanger device and an indirect heat exchanger device and a method of operating the same encompasses conveying a hot fluid to be cooled from a hot fluid source through the indirect heat exchanger device to a cooling fluid distribution system. The hot fluid to be cooled is distributed from the cooling fluid distribution system onto the direct heat exchanger device. In a hybrid wet/dry mode, ambient air flows across both the indirect heat exchanger device and the direct heat exchanger device to generate hot humid air from the ambient air flowing across the direct heat exchanger device and hot dry air from the ambient air flowing across the indirect heat exchanger device.

US Patent:

20120067546, Mar 22, 2012

Filed:

Sep 17, 2010

Appl. No.:

12/885083

Inventors:

Davey J. Vadder - Westminster MD, US

Assignee:

EVAPCO, INC. - Taneytown MD

International Classification:

F24F 7/00
F28F 9/24
F28F 1/20
F24F 3/14
F28F 9/02

US Classification:

165 59, 165 60, 165158, 165181, 165159

Abstract:

A hybrid heat exchanger apparatus having a heat exchanger device with a hot fluid flowing therethrough includes a cooling water distribution system and an air flow mechanism for causing ambient air to flow across the heat exchanger device. The cooling water distribution system distributes evaporative cooling water onto the heat exchanger device to wet only a portion of the heat exchanger device while allowing a remaining portion of the heat exchanger device to be dry. The air flow mechanism causes ambient air to flow across the heat exchanger device to generate hot humid air from the ambient air flowing across the wet portion of the heat exchanger device and hot dry air from the ambient air flowing across the remaining dry portion of the heat exchanger device. Methods are also described.

US Patent:

6357681, Mar 19, 2002

Filed:

Jul 18, 2000

Appl. No.:

09/618313

Inventors:

Timothy J. Bowser - Stillwater OK
Davey Joe Vadder - Springfield VA

Assignee:

The Board of Regents for Oklahoma State University - Stillwater OK

International Classification:

B02C 1900

US Classification:

241 823, 241 94, 241283

Abstract:

A cutter-separator. Product is fluidized under pressure, forced through the bore of a spring and thence through the gaps between the coils of the spring while in its extended condition. When the spring returns to its compressed, or relaxed, condition the product which has been forced through the coils is reduced in size (i. e. , cut, partially cut, or mashed, as desired) by the spring. Contaminants which are too large to pass between the coils are ultimately carried to the end of the spring, downstream from the product flow, where they are discharged.

US Patent:

20220325957, Oct 13, 2022

Filed:

Mar 29, 2022

Appl. No.:

17/706746

Inventors:

- Taneytown MD, US
Davey Joe Vadder - Westminster MD, US

International Classification:

F28D 3/02
F28D 1/047
F28C 1/14
F28F 1/02
F28D 3/04
F28F 1/06

Abstract:

An air-over evaporative heat exchanger with multi-lobed or “peanut” shaped tubes replacing conventional round or elliptical tubes. The tubes have a narrow horizontal cross section and tall vertical cross section to allow the multiplication of surface area in the same coil volume while maintaining or increasing the open-air passage area. This configuration allows the coil to have an overall external heat transfer coefficient much higher than a conventional coil, while the tube shape allows the use of thinner material, reducing the weight and cost of the heat exchanger.