Tab 04 SOW.pdf

Recirculating Process Chiller Specification

GRC B401

GRC Building 402 Portable Recirculating Process Chiller Requirements Specification

October 22, 2024 Rev 3

SCOPE of SUPPLY

The scope of this procurement covers the manufacture and delivery of a portable recirculating process chiller unit to be installed and operated at the NASA Glenn Research Center (GRC). The closed-loop, portable chiller system with integral air-cooled condenser shall provide minimum of 3 gpm (12 liter/min) of cooling water during normal operations at a nominal inlet temperature that can be controlled between 14 - 86 oF. The equipment to be cooled includes multiple gas compressors with an in-series oil after-cooler. The baseline chiller capacity shall have a nominal operating cooling load of minimum 2.9 kW at 3 gpm of water flow at a 20 psid pump discharge pressure. The government has in essence incorporated the required design margins into this specification for both unanticipated coolant flow rate demands and increased chiller capacity needs. The chiller unit will be located at GRC facility that is indoors but does not have conditioned air in an unclassified electrical area. The detailed requirements and vendor proposal response guidelines for the process chiller unit requested by the government, are defined in this procurement specification and are herein outlined below numerically by items 1 thru 27 for those interested and qualified vendor/suppliers to respond to.

1) Equipment: Portable Recirculating Chiller Unit

2) Order Qty: 1

3) Process Description: Chiller for closed loop cooling for a flight like cryocooler using three helium compressors. The chiller unit will provide cooling water/glycol mixture for compressor system. All plumbing between the chiller and the loads will be the responsibility of

NASA.

4) Chiller Heat Rejection: An air-cooled condenser that is operable in an indoor facility without conditioned air.

5) Fluid to be cooled: 50/50 water/propylene glycol mixture (Actual mixture percentage shall be appropriate for outdoor use in Cleveland, Ohio both during full operation and when idle or off.)

7) Chiller discharge adjustable design temperature, range: -10 to 30 oC 14 to 86 oF

8) Nominal chiller discharge operating temperature range: -3 to 25 oC 27 to 78 oF

9) Flow rate of coolant fluid through chiller: 12 LPM (3 GPM)

10) Pump discharge Pressure to circulate coolant through the loop: min 138 kPa (min 20 psid @ min flow = 3 gpm)

11) Chiller Design Capacity:

Outlet Temp oC (oF) kW Btu/hr

20 (68) 2.9 10,200 0 (32) 1.9 6,500

(chiller capacity requirement shown here includes margin)

12) Power Supply: 208 V / 60 Hz

13) Current 30 Amps maximum

14) Electrical Certification: UL or engineering equivalent

15) Chiller Configuration: Closed-Loop Recirculating Packaged Chiller

16) Condenser Type: Air Cooled, Self-Contained

17) Installation Location: Indoors (but not conditioned air), portable

18) Ambient Temperature Range: 0 – 35 oC (32 – 95 oF) (outdoors – dry bulb)

19) Chiller coolant plumbing connections: 0.5” MNPT (In / Out)

20) System Design Pressure: 90 psig max

Chiller Instrumentation & Controls to be Supplied by Vendor:

21) Temperature Control: Solid state temperature controller ± 2 oC (± 3.5 oF) of set-point w/analog I/O for local or remote temperature control & monitoring.

Include high/low temp alarm w/warning signals signifying a condenser fan or compressor failure. Adjustable temperature control range of -10 to 30 oC (14 to 86 oF).

22) Level Gauge: Local Sight-glass level gauge for coolant tank level

23) Pressure Gauge: Pump discharge water coolant pressure

24) Thermometer: Pump discharge water coolant temperature

General Notes:

(1) The above specifications are minimum requirements. The chiller vendor shall supply other as-necessary mechanical or electrical design features including instrumentation & controls for proper and safe equipment operation.

25) Warranty and Servicing:

The vendor shall provide a minimum one year warranty including parts and labor with provisions for extended storage prior to actual installation and startup.

26) Delivery Destination:

The vendor/supplier shall include in their firm-fixed price cost proposal to the Government, FOB shipping costs of the packaged chiller to the following location:

NASA Glenn Research Center 21000 Brookpark Rd.

Cleveland, OH 44135

27) Documentation Deliverables:

The vendor/supplier shall provide at a minimum three (3) copies of the following documentation at time of equipment delivery:

Installation, Operation and Maintenance Manuals (as applicable) Chiller Fluid System Schematic including design temperature and pressure Electrical Wiring Diagram Mechanical Drawing w/dimensions

28) Vendor/Supplier Proposal:

The vendor/supplier shall include in their firm-fixed price response to this solicitation at a minimum the following information:

Technical description of proposed Chiller Specifications of proposed Chiller to be furnished Chiller operation and controls description Delivery schedule Shipping/transportation costs Listing of Vendor supplied Deliverables Any exceptions to the above government requirements as listed above in this procurement document (see items 1 – 27)

29) Government Technical Point of Contact:

NASA Glenn Research Center 21000 Brookpark Rd. MS 86-12 Cleveland, OH 44135