Request for Information - TPS-75 Heat Exchanger_for Review1.pdf

CUI

AFMC AFLCMC/

C3BYC CRC AN/TPS-75 Radar System RFI-HX-JUL25

Hill AFB, UT Substitute Radar Heat Exchanger/Chiller For Review 1 PMO Request For Information (RFI) 23 JUL 2025

Controlled By: AFLCMC/C3BYC CUI Category: CTI Distribution/ Dissemination Controls: D POC: Dane Feher 801-586-4730

AN/TPS-75 3D Radar Sustainment Support for Control and Reporting Center (CRC) Program Office (AFLCMC/HBZI) at Hill AFB, Utah

REQUEST FOR INFORMATION (RFI)

1. Description

1.1. The Control and Reporting Center (CRC) Program Office is seeking information on a suitable substitute for TPS-75 radar system heat exchanger, which functions as a chiller for the transmitter compartment equipment. This heat exchanger would cool a pulse forming network, focus coil, twystron body, twystron collector, and SF6 tank within the TPS-75 radar. The PMO is seeking heat exchangers for initial use to support depot maintenance operations, then CONUS unit locations, and eventually distributed for mission operational use once reliability and performance are proven. Manufacturer maintenance support of field level repair of the provided equipment would be sought separately. The potential duration of the effort would encompass a period of 5 years.

1.2. A fully integrated solution will incorporate filtration and purification of the cooling loop. If the proposed solution does not incorporate adequate coolant purification equipment, the PMO will install legacy filtration and purification equipment in-line to cover the need.

1.3. Requirements

1.3.1. Objective requirements are sought but not a essential feature of a solution

1.3.2. Threshold requirements are critical to a solution being considered viable

Solution Requirements List

# Requirement Objective

Threshold

Detailed Description

1. Ethylene Glycol used as coolant Threshold 60% Ethylene Glycol 40% H20

2. Capable of using distilled H20 as coolant Objective

3. Forklift transportable Threshold

4. Employed extended from radar Objective Capable of meeting design requirements with a 30ft hose extension for supply and return

5. Operable without supervision Objective Must not require operator intervention for up to 4 hours

6. Coolant reservoir must be contained within skid perimeter Objective

7. Heat rejection must be to atmosphere Threshold

8. Capable of outdoor operation without overhead cover Threshold

9.

Possess monitoring gauges:

Supply pressure, supply temperature, return pressure, return temperature

Objective

AFMC AFLCMC/

C3BYC CRC AN/TPS-75 Radar System RFI-HX-JUL25

Distribution/ Dissemination Controls: D

1.4. Key Performance Characteristics:

Description Value Unit 1 Primary Fluid Ethylene Glycol - 2 Mixture Concentration 60 % 3 Alternate Fluid Distilled H20 - 4 Legacy Maximum Flow 9.5 gpm 5 Legacy Minimum Flow 7.75 gpm 6 Available Primary Power, Voltage 120V/208V 3 Phase WYE 60 Hz - 7 Available Alternate Power, Voltage 208/120V 3 Phase WYE 400 Hz -

8 Legacy Minimum Measured Pressure * 85 psig

9 Legacy Nominal Supply Pressure* 120 psig

10 Legacy Maximum Measured Pressure* 135 psig

11 Minimum Required Inlet Temperature 10 °C

12 Maximum Permissible Inlet Temperature 40 °C

13 Maximum Operating Pressure 150 psig 14 Total Heat Dissipation Required** 24.5 kW 15 Heat Capacity Requirement** 83597.47 Btu/hr 16 Heat Capacity Requirement** 6.966 ton of refrigeration 17 Minimum Ambient Temperature -40 °F 18 Maximum Ambient Temperature 125 °F 19 Minimum Reservoir Size*** 5 gal

*Measured inside radar shelter. Pressure losses following supply pump are unknown. Pump must be capable of achieving this range when installed.

**Equipment close to this capacity will be evaluated for adequacy by the PMO.

***reservoir size assumes the system is filled and all normally wetted parts are wetted.

Solution Requirements List

# Requirement Objective

Threshold

Detailed Description

10. Operable without nearby crew requiring hearing protection Objective

11. Variable frequency drive pump Objective

AFMC AFLCMC/

C3BYC CRC AN/TPS-75 Radar System RFI-HX-JUL25

Distribution/ Dissemination Controls: D

1.5. Applicable Legacy TPS-75 System Standards (for information only)

1.5.1. Intended application is less severe than indicated by below standards and thresholds.

1.5.2. Not all required for RFI responses

1.5.3. Substitutions would be considered

1.5.4. Omissions will be considered

1.5.5. Design parameters outside of desired thresholds will be considered at risk by the

PMO

Applicable Legacy TPS-75 System Standards (for information only) Item Service Condition

Parameter Relevant Standard

Standard Test Method

Test Parameter Objective

Test Parameter Threshold

1. High Temperature, Operating

MIL-STD-810H

w/CHANGE 1

METHOD

501.7

120 °F (49 °C) TBD by PMO

2. High Temperature, Non-Operating

MIL-STD-810H

w/CHANGE 1

METHOD

501.7

160 °F (71 °C) TBD by PMO

3. Low Temperature, Operating

MIL-STD-810H

w/CHANGE 1

METHOD

501.7

-40 °F (-40 °C) TBD by PMO

4. Low Temperature, Non-Operating

MIL-STD-810H

w/CHANGE 1

METHOD

501.7

-80 °F (-62 °C) TBD by PMO

5. Humidity, Operating

MIL-STD-810H

w/CHANGE 1

METHOD

507.6

High: 95% RH @ 80°F Low: 5% RH @ 80°F TBD by PMO

6. Humidity, Non-Operating

MIL-STD-810H

w/CHANGE 1

METHOD

507.6

High: 100% RH @ 80°F Low: 5% RH @ 80°F TBD by PMO

7.

Low Pressure

(High Altitude), Operating

MIL-STD-810H

w/CHANGE 1

METHOD

500.6

10.12 psia (simulating 10,000ft) TBD by PMO

8.

Low Pressure

(High Altitude), Non-Operating

MIL-STD-810H

w/CHANGE 1

METHOD

500.6

1.69 psia (simulating 50,000ft) TBD by PMO

9. Shock MIL-STD-810H w/CHANGE 1

METHOD

516.8

Characteristic shock from transport by truck, aircraft, & helicopter and exposure to transit drop to extent of package size & weight

TBD by PMO

10. Vibration MIL-STD-810H w/CHANGE 1

METHOD

514.8

Characteristic vibration from transport by truck, aircraft, rail, & helicopter

TBD by PMO

AFMC AFLCMC/

C3BYC CRC AN/TPS-75 Radar System RFI-HX-JUL25

Distribution/ Dissemination Controls: D

Applicable Legacy TPS-75 System Standards (for information only) Item Service Condition

Parameter Relevant Standard

Standard Test Method

Test Parameter Objective

Test Parameter Threshold

11. Temperature Shock

MIL-STD-810H

w/CHANGE 1

METHOD

503.7

Non-Operating:

-40°C to +24°C

And +18°C to +71°C

Storage/Transport:

-40°C to +71°C

TBD by PMO

12. Sand & Dust MIL-STD-810H w/CHANGE 1

METHOD

510.7

Blowing Sand Concentration:

2.2 g/m3, -0.0/+0.2 g/m3

Particle Size:

150 to 850 µm

Air Velocity:

18 m/s

Blowing Dust

Concentration:

10.6 ±7 g/m3 Particle Size:

<149 µm Air Velocity:

8.9 ± 1.3 m/s

TBD by PMO

13. EMI/EMC MIL-STD-461G

CE101, CS114,

CS115, CS116,

CS118, RS103

TBD by PMO

14. Rain

MIL-STD-810H

w/CHANGE 1 METHOD

506.6

4 in rain/hr and 2 in windblown snow/hr without leakage or moisture penetration

TBD by PMO

15. Wind Exposure to 90 knots wind speed TBD by PMO

16. Salt Atmosphere

MIL-STD-810H

w/CHANGE 1 METHOD

509.8

Exposure to a salt fog atmosphere with a salt concentration of at least 5%

TBD by PMO

17. Ice Load

MIL-STD-810H

w/CHANGE 1 METHOD

521.4

2 inch ice accumulation on any exposed surface N/A

18. Fungus

MIL-STD-810H

w/CHANGE 1 METHOD

508.8

Show no signs of fungal growth after prolonged exposure to

AFMC AFLCMC/

C3BYC CRC AN/TPS-75 Radar System RFI-HX-JUL25

Distribution/ Dissemination Controls: D

1.6. Request For Information (RFI) Only. This RFI is issued solely for information and planning purposes; it does not constitute as a Request for Proposal (RFP) or a promise to issue an RFP in the future. This RFI does not commit the Government to contract for any supply or service whatsoever. Further, the Government is not at this time seeking proposals. The RFI respondents are advised that the Government will not pay for any information or administrative costs incurred in response to this RFI; all costs associated with responding to this RFI will be solely at the interested party’s expense. Not responding to this RFI does not preclude participation in any future RFP, if any is issued. If a solicitation is released, it will be synopsized on the Contract Opportunities website (https://sam.gov/content/opportunities). It is the responsibility of the potential offerors to monitor these sites for additional information pertaining to this requirement.

Applicable Legacy TPS-75 System Standards (for information only) Item Service Condition

Parameter Relevant Standard

Standard Test Method

Test Parameter Objective

Test Parameter Threshold fungus growth as encountered in tropical climates

19. Sunshine, Operating

MIL-STD-810H

w/CHANGE 1 METHOD 505.7

Operating: -40°C to +49°C plus solar load of

1120 W/m2 TBD by PMO

20. Sunshine, Non-operating

MIL-STD-810H

w/CHANGE 1

METHOD 505.7

survive exposure to sunshine for 10 years with regular preventative maintenance

TBD by PMO

21. Noise

MIL-STD-740-

OSHA 1910.95

Sound levels under 90 dBA for work day exposure (<8hr)

AFMC AFLCMC/

C3BYC CRC AN/TPS-75 Radar System RFI-HX-JUL25

Distribution/ Dissemination Controls: D

2. Background

2.1. The AN/TPS-75 radar system is an “S” band, mobile, tactical, transportable ground radar system capable of rapidly detecting and identifying airborne targets within a 240-nautical-mile area. The system is hardened against ECM and has ECCM capabilities as well as the ability to “burn through” most types of jamming. It provides a "real-time" radar airspace picture and data in support of the Joint Force Air Component Commander (JFACC). This decades old Radar system can be and is now deployed in support of worldwide wartime operations and national security missions. The AN/TPS- 75 radar system must endure movement by truck, air or rail. This system serves as the AF’s primary deployable, long range surveillance radar providing tactical Battle Management Command and Control (BMC2) data supporting the JFACC in all manner of operational situations. System Operational Availability (Ao) has declined since the mid ‘90’s due to aging system components based upon 1960’s technology (TPS-43 fielded in the 1950’s, with the only major tech-refresh being an upgraded antenna and solid state receiver group in the ‘80’s which then re-designated the system “TPS-75”) and DMSMS (obsolescence) issues.

2.2. System Example Clarification

2.2.1.

2.2.1.1. Legacy heat exchanger employed standalone on right side of picture

2.3. Legacy heat exchanger clarification

AFMC AFLCMC/

C3BYC CRC AN/TPS-75 Radar System RFI-HX-JUL25

Distribution/ Dissemination Controls: D

2.3.1.

2.3.1.1. Use incorporated in support equipment pallet (not required for proposed solutions)

2.3.2.

2.3.2.1. Legacy Heat Exchanger shown for reference

AFMC AFLCMC/

C3BYC CRC AN/TPS-75 Radar System RFI-HX-JUL25

Hill AFB, UT Substitute Radar Heat Exchanger/Chiller For Review 1 PMO Request For Information (RFI) 23 JUL 2025

Controlled By: AFLCMC/C3BYC CUI Category: CTI Distribution/ Dissemination Controls: D POC: Dane Feher 801-586-4730

3. Requested Information

3.1. The CRC is requesting the following information to evaluate potential equipment options.

4. Delivery Date

4.1. Delivery would occur during USAF FY26 (starting October 2025). Initial purchase would occur during FY25.

5. Limitations

5.1. None specified at this time.

6. Security Requirements

6.1. None specified at this time.

7. Responses

7.1. It is suggested interested parties respond to this RFI with the table listed above along with product data sheets that represent a potential product solution.

7.1.1. Responses can be in either Microsoft 365 word or excel compatible format for the request list and pdf format for datasheets and due NLT13 AUG 2025, 1600 MST.

# Requested Item Detailed Description

1. Company Name

2. Company CAGE Code

3. Point of Contact (POC) Name

4. POC Email

5. Telephone Number

6. Fax Number

7. Company Website Link

8. Company Location

9. Experience with military systems

If applicable, identify military systems using the provided equipment

10. Contract Vehicles Available

If applicable, what contract vehicles/avenues are available to your company?

11. Equipment data sheet

Equipment Data sheet for potential solution equipment

12. Cost estimate Rough estimate for cost to purchase 1 unit of potential solution equipment

13. Lead time Rough estimate for procurement lead time for 1 unit of solution equipment

1152325793C Highlight

1152325793C Highlight

1152325793C Highlight

AFMC AFLCMC/

C3BYC CRC AN/TPS-75 Radar System RFI-HX-JUL25

Distribution/ Dissemination Controls: D

Any response is limited to 5 single-sided pages, excluding product data sheets, and submitted via e-mail only to the Government Point of Contract (POC): Wendy Farley, Contracting Officer, wendy.farley@us.af.mil.

7.1.2. Proprietary information, if any, should be kept to minimum and MUST BE CLEARLY MARKED. To aid the Government, segregate proprietary information.

Please be advised that all submissions become Government property and will not be returned. If any respondent does not currently have a Proprietary Data Protection Agreement (PDPA) that would permit the Government’s personnel to review and evaluate the submitted response to this RFI, the respondent should request to sign PDPAs with the Government.

7.1.3. Please note that all CRC Program Office government or contractor personnel have executed Non Disclosure Agreements (NDA) for all related project information.

8. Meetings and Discussions

8.1. The Government representatives may or may not choose to meet with potential RFI respondent. Such meetings and discussions would only be intended to get further clarification of potential capability and risks.

9. Questions

9.1. Questions and responses regarding this RFI should be submitted in writing by e-mail to the CRC Program Office Contracting Officer, Wendy Farley, wendy.farley@us.af.mil.

10. Summary

10.1. This RFI is only intended for the Government to identify sources that can provide

AN/TPS-75 heat exchanger solutions. The information provided in this RFI is subject to change and is not binding to the Government. The Government has not made a commitment to procure any of the RFI requirements discussed, and release of this RFI should not be construed as such a commitment or as authorization to incur cost for which reimbursement would be required or sought. All submissions become Government property and will not be returned.

mailto:wendy.farley@us.af.mil mailto:wendy.farley@us.af.mil