Attachment No. 1 - Technical Specifications_MMW Chiller System.pdf
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- Attached to
- MMW Chiller For Balance of Plant
- Solicitation number
- RFQ-2026030648
- Issued by
-
Department of Energy Office of Science
About this file
This is a Technical Specifications document for an outdoor air-cooled chiller system designed to support a MultiMegawatt (MMW) electrolyzer hydrogen production project. The chiller will cool a 50/50 propylene glycol and water mixture to condense water from saturated hydrogen gas produced by a proton exchange membrane (PEM) electrolyzer, enabling the production of dry gaseous hydrogen for use in fuel cells and related equipment.
The required chiller system must deliver a minimum of 15 tons of cooling capacity at 35°F process temperature with 95°F ambient air, with a stated design goal of 20 tons at 44°F. The system must accommodate variable cooling demand with coolant flow rates between 60–90 gallons per minute and supply pressures between 40–100 psi. The entire unit must be a single, self-contained outdoor-rated package with process fluid inlet and outlet connections. All electrical components must be OSHA-approved NRTL listed (UL, CSA, or equivalent), with any component above 50 volts individually listed if the entire unit is not certified. The system requires 480 VAC 3-phase power, remote on/off control capability, and NEMA 3R rated enclosure protection. Operating conditions include ambient temperatures of 0–95°F and wind speeds up to 80 mph; the system must survive (while shut down) ambient temperatures of –20–104°F and wind speeds up to 155 mph at the 6,000-foot elevation site. Delivery is required by Friday, September 11, 2026. The National Laboratory of the Rockies (NLR) will be responsible for process piping connections and heat exchangers.
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Text version
Attachment No. 1
Technical Specifications
MMW Chiller for Balance of Plant
6/29/2026
BACKGROUND
Chiller to cool glycol process fluid for the function of cooling and drying the hydrogen that is produced by the MultiMegawatt (MMW) electrolyzer project
OBJECTIVE
This chiller is part of the process of creating dry gaseous hydrogen with a proton exchange membrane (PEM) electrolyzer. As part of the PEM process, hydrogen is created saturated with water. In order to use this hydrogen in fuel cells and other equipment the hydrogen must be dried. This chiller will provide cooled glycol to condense the water out of the hydrogen stream as the bulk reduction of water step of the process. National Laboratory of the Rockies (NLR) will be responsible for process piping to connect the chiller to the drying equipment and heat exchanges. This purchase request is for chiller, glycol pump, and glycol buffer tank system with process port connections for glycol.
SPECIFICATIONS:
REQUIRED CAPABILITIES
• Outdoor air-cooled chiller system to reach a total cooling capacity of 20 tons of cooling at 44°F with 95°F ambient air temperature (actual process requirement is a minimum of 15 tons of cooling at 35°F process temperature with 95 F ambient).
o Request is for single self-contained unit with and process fluid inlet and outlet. Process connection and process heat exchangers will be NLR’s scope.
o Required process cooling will be variable. Chiller will need to be able to accommodate variable cooling demand
• Process side (cooled fluid) specifications o 50%/50% propylene glycol and water by volume o Flow rate 60-90 gpm total coolant process flow o Fluid set temperature 35°F o Supply pressures between 40 psi and 100 psi are acceptable
• Ambient operating conditions o Entire unit must be outdoor rated o NEMA 3R rated enclosure minimum (rain/snow/blown dust) o Elevation 6,000 feet above sea level o Operation in following conditions
0 – 95 F ambient temperature Wind speeds up to 80 mph o Survivability (system operation will be paused (chiller/pumps off) and then manually restarted at above ambient operation conditions) -20 – 104 F ambient temperature Wind speeds up to 155 mph (wind breaks can be installed by NREL if necessary)
• Utilities and Controls o 480 VAC 3 phase o Remote control input for on/off o Remote temperature setpoint control is not necessary if local settings remain through power cycles o Entire unit should be an OSHA approved NRTL listed (UL, CSA, etc.) for the electrical components. If entire unit is not listed, any electrical component above 50 volts must be individually NRTL listed.
TECHNICAL OR SAFETY REQUIREMENTS
• Entire unit should be as OSHA approved NRTL listed (UL, CSA, etc.) for the electrical components. If entire unit is not listed, any electrical component above 50 volts must be individually NRTL listed.
TIMELINE
• Delivery needed by Friday, September 11, 2026.
| Attachment No. 1 |
| Technical Specifications |
| MMW Chiller for Balance of Plant |
| 6/29/2026 |
| BACKGROUND |
| OBJECTIVE |
| SPECIFICATIONS: |
| REQUIRED CAPABILITIES |
| TECHNICAL OR SAFETY REQUIREMENTS |
| TIMELINE |
File details come from the government source that posted it. Updated .