Attachement 1- Technical Specifications_RFQ 20240104_01.04.2024.pdf
PDF 130 KB Posted
- Attached to
- Multi-MW Electrolyzer Power Supply Unit
- Solicitation number
- RFQ_20240104
- Issued by
-
Department of Energy Office of Science
About this file
This technical specification document outlines requirements for a multi-megawatt electrolyzer power supply unit sought by the National Renewable Energy Laboratory on behalf of the Department of Energy. The power supply unit must provide a minimum combined output of 6 megawatts from AC to DC conversion to independently power and test multiple hydrogen electrolyzer stacks totaling up to 6 megawatts. Key requirements include an input voltage of 13.2 kilovolts AC at 60 Hz, an isolated and floating DC output of 500 volts or greater, voltage and current regulation capabilities, ambient temperature ratings of -30 to +40 degrees Celsius for operation and -30 to +40 for survival, and protection features such as overvoltage, overcurrent and overtemperature. The specification also describes preferred capabilities including low current and voltage turndown ranges, fast response times, outdoor enclosure, air cooling, and ability to parallelize or serialize units. Quotes must include detailed descriptions of technical experience and capabilities, equipment specifications, control features, efficiency ratings, dimensions and interface requirements.
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Attachment 1: Technical Specifications
Multi-MW Electrolyzer Power Supply Unit
01/04/2024
Objective:
NREL intends to provide DOE and industry with critical RD&D capabilities to accelerate and scale aggressive decarbonization goals for various sector such as steel, cement, transportation (on- and off-road) etc. The procured rectifier will be an integral part of hydrogen research infrastructure and provide a testbed to demonstrate system integration, energy storage, grid services, and renewable hydrogen production. The goal here is to provide testbed to test electrolyzer stacks of up to 6 MW single stack, up to six stacks of 1 MW each, or various combinations in between.
Environmental Conditions:
The system will be primarily used outdoors and is expected to be located at NREL’s Flatirons Campus. The campus is at high altitude and incurs extreme weather. Unique specifications are included below.
Operations may be limited to specified environmental conditions; however, the unit(s) should be environmentally protected for outdoor installation and operation. Other exposures may include high winds and dusty conditions. The unit will need to be protected from lightning strikes.
Environmental conditions
Ambient temperatures: -300C to +400C
Humidity: full-range, outdoor conditions, Arvada, Colorado
Elevation: 6040 ft above sea level
Winds: 155 mph ultimate wind speed
Required Specifications:
• Input voltage: 3ph, 13200V AC
• Input frequency: 60 Hz +/- 5%
• Supplier will provide the requisite transformer to integrate with site medium voltage grid
• Total output power: minimum 6 MW
• Ability to independently control voltage and current for three or more hydrogen electrolyzer stacks remotely
• Output rated voltage greater than or equal to 500V DC
• Isolated, floating DC output
• DC voltage regulation: <1%
• Target power factor: > 0.95
• Survival ambient temperature: -300C to +400C
• Operating ambient temperature: -100C to +400C
• Protections: Remote interlock, overvoltage, overcurrent (DC output and AC input), overtemperature, short circuit
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• OSHA approved Nationally Recognized Testing Laboratory (NRTL) approval
• Remote data acquisition and control capability
Preferred Capabilities:
• Low current turndown –able to maintain high voltage output at low currents down to 5-10% of rated operating current
• Low voltage turndown – able to maintain high rated current at low voltages down to 250 VDC
• High slew rate/response time 100ms or better
• Outdoor rated, preferably NEMA 4 or NEMA 4X enclosure
• Air cooling system
• Ability to parallelize and/or serialize the units to achieve broader voltage and current range
Quotes must include:
• Description of company’s experience in AC/DC conversion system
• Description of technical capabilities of company’s AC/DC conversion system
• Provide one-line electrical drawing of equipment
• Thermal management system attributes and maintenance requirements for storage mode during cold conditions
• Specifications or design approach supporting installation and use of the unit in outdoor testing environment
• Efficiency rating at full load and part load operation
• Auxiliary/support power requirements (heaters, fans, telecom gear, etc.); specify if these components require an independent power feed(s).
• Control and power module standby power consumption
• Physical dimensions, weights, and connection methods of the complete system that aids with installation planning. Please address, o Interface drawings and requirements o Mounting and foundational requirements o Electrical and thermal clearance requirements
Quotes should assume:
• Physical installation at NREL site will be responsibility of NREL
• Shipment method and costs should be included in cost and delivery timing o NREL’s Flatirons Campus Laboratories and Offices, National Renewable Energy Laboratory 19001 W 119th Ave, Arvada, CO 80007
Quotes should include:
• Description of company’s past performance and proof of demonstration
• Description of any required persistent or temporary remote connections required for maintenance, operations, or telemetry
• Description of standard operating modes and unique capabilities
• Overload ratings and durations
• Factory checkout testing procedures
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• Standards and certifications to which units and system comply
• Production and delivery lead times
• Safety guidelines and unique features
• warranty options, ongoing support, license, or other fees
• On-site and remote technical support plan, response times, service, and maintenance contract options
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