REVISED_STATEMENT_OF_NEED_PLEASE_USE_THIS_ONE_0001.pdf

NOAA Ship PISCES

August 2025

REVISION-1

NOAA FSV Class Propulsion Motor Heat Exchanger Replacement

1. SCOPE

1.1. Procure two (QTY 2) new propulsion motor coolers for NOAA Ship PISCES.

2. REFERENCES

2.1. Industrial Heat Transfer (IHT) Heat Exchanger Drawing SKT012125 “Coil Assembly”

2.2. Thermofin Heat Exchanger Drawing 11463-1 “Type Electra L/D”

2.3. TECO Motor Heat Exchanger Drawing 14D-0232-C01 “Cooler Outline”

2.4. Technical Manual FRV40-226-058-010 “Motor, Propulsion DC Models: 2795AA, 2x1125

KW (2X1508 HP), 750 VDC, 134 RPM”

3. GOVERNMENT FURNISHED MATERIAL

3.1. None

4. REQUIREMENTS

4.1. Fabricate and ship two new replacement heat exchangers for the main propulsion motors.

The main propulsion motors are manufactured by Teco-Westinghouse Model Number

2795AA (1125 KW, 1508 HP, 750 VDC, 134 RPM each). Reference 2.3 shows the original

OEM furnished heat exchangers. Reference 2.1 shows the currently installed heat exchangers.

4.2. The new replacement heat exchangers shall be compatible with the existing Teco-

Westinghouse motors specified in Reference 2.4 without motor modification, capable of the same cooling capacity, and of similar construction. The heat exchangers shown in

References 2.1, 2.2, and 2.3 may be used for reference for construction of the new heat exchangers. The new heat exchangers shall meet the performance specifications provided in

Reference 2.3 and those provided below:

Fin Side Tube Side

Fluid Circulated: Air Seawater

Total Fluid Entering: 9360 CFM @ 122 °F 120 GPM

Temperature In: 174 °F 89.6 °F

Temperature Out: 122 °F 98.0 °F

Operating Pressure: 14.7 PSI 40 PSI

MinimumTotal Heat Exchanged: 140 KW (477,820 BTU/HR)

Overall Dimensions including

Flanged connections (L x W x H): 82 11/16” long x11” width x 35 1/8” tall

4.2.1. Heat exchangers shall be constructed for a design tube side temperature of 200 °F, design pressure of 100 PSI, and a test pressure of 200 PSI. A double-walled 70/30

Copper-Nickel tube and tubesheet design shall be used. Tubes shall be outfitted with extruded aluminum fins. Inner tubes shall be constructed on 70/30 CuNi; outer tubes of

90/10 CuNi. All tubesheets normally exposed to sea water shall be constructed from

70/30 CuNi; all other tubesheets, the header covers with flanged connections, and material potentially exposed to sea water shall be constructed out of 90/10 CuNi.

4.2.2. Existing Main Sea Water piping connections on the ship to the waterbox are 2.5” 150 lb 316 Stainless Steel flanged connections.

4.2.3. Heat exchangers shall have a condensate drain, tell-tale vent and drain connections

(leak detector), and waterbox vent and drain connections as well as outfitted with a minimum of four (QTY 4) zinc anodes with two (QTY 2) on the header and two (QTY

2) on the return side.

4.2.4. All hardware used on the heat exchanger shall be 316 stainless steel. Zinc coated hardware is not acceptable.

4.2.5. Heat exchanger casing may be hot dipped galvanized carbon steel (ASTM A123).

4.2.6. Provide a spare gasket kit for sealing up the tube bundle after the first tube cleaning.

4.2.7. The new heat exchangers must meet all performance and design criteria of

References 2.1, 2.2, and 2.3. Where differences between References 2.1, 2.2, and 2.3 are recognized, Reference 2.3 prevails.

4.3. Design drawings shall be submitted to and approved by COR prior to construction.

Contractor shall adjudicate all drawing remarks to GOVT satisfaction and provide final as-built drawings after fabrication. Design drawing shall show performance specifications for the new cooler and all dimensions, including the double walled tube design.

4.4. Contractor shall also submit the new heat exchanger design to ABS for approval. Contractor shall complete any FAT testing & verification with ABS and submit ABS approval to the

COR.

4.5. Provide a standard warranty for the heat exchanger and specify warranty conditions and length in contractor’s proposal.

4.6. Contractor’s bid shall provide demonstrated successful past performance for at least one year in relevant similar applications.

4.7. The heat exchanger shall be shipped to the following address.

Attention Stephen Spindler

151Watts Ave

Pascagoula, MS 39567

5. QUALITY ASSURANCE

5.1. The heat exchangers shall be designed, manufactured, testing, and stamped in accordance with ABS Steel Vessel Rules and ASME Section VIII, Division 1.

5.2. Design drawings shall be provided to and approved by COR prior to fabrication.

6. NOTES

6.1. Send shipping information to PISCES Port Engineer Stephen Spindler

(Stephen.spindler@noaa.gov; 251.776.3099) mailto:Stephen.spindler@noaa.gov