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60+ Years of Cryogenic Engineering Experience

You can’t teach experience.

You achieve it by doing.

Emerald Energy NW (EENW) offers six decades of experience in magnetic refrigeration, cryogenic liquefaction and cryocooling, backed by continual technology development. We help organizations avoid costly design choices and move promising cryogenic projects rapidly forward.

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Mount Rainier line art from the Emerald Energy NW identity

Experience across the cryogenic range

Room temperatureCryogenicMillikelvin
Magnetic refrigerationHydrogen liquefactionCryocooling

What EENW offers

Two beneficial ways to work with EENW.

Start with the problem your team needs to solve. EENW brings experience where it matters and keeps proprietary implementation details private.

01 · Technical expertise

Magnetic liquefaction expertise for hydrogen

EENW helps technical teams make better choices in magnetic liquefier development for hydrogen through teaching, technical guidance and decades of hands-on experience.

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02 · Cryocooling

Efficient two-stage cryocooling for superconducting devices

EENW offers efficient two-stage cryocooling for superconducting devices and related low-temperature systems. Contact us to discuss fit, integration and next steps.

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Engage with EENW

From concept to performance.

EENW works alongside technical teams across the development process. We can enable your team to make excellent cryogenic engineering choices in your design.

Conceptualize, analyze and modelClarify the problem, test assumptions and compare practical paths before costly choices are locked in.
Design, build and testMove from design through lab-scale prototypes, testing and disciplined interpretation of results.
Interpret results and improve performanceUse the numbers to refine the design, improve performance and give the team information to make revisions needed to move forward.

“Let the numbers decide.” Experience includes taking technologies from lab-scale prototypes through commercial systems.

Selected credentials

Credentials built over decades.

Dr. Barclay has worked across fundamental low-temperature research, university teaching, national laboratories, and industrial companies for cryogenic technology development.

60+years of cryogenic engineering experience
200+peer-reviewed publications
32+patents as inventor or co-inventor
PATENT OF THE YEARLos Alamos National Laboratory

01 · Education & millikelvin research

Notre Dame and UC Berkeley

B.S. in Chemistry from the University of Notre Dame and a PhD from the University of California, Berkeley. Experimental research included NMR on samples cooled to 2–10 millikelvin.

02 · Tertiary education

University teaching and professorships

Barclay’s career includes university teaching and professorial roles, bringing research experience directly into tertiary education and technical training.

03 · Los Alamos · 1982

Co-inventor of the active magnetic regenerator

At Los Alamos Scientific Laboratory, he co-invented the active magnetic regenerator with William A. Steyert Jr. U.S. Patent 4,332,135 was issued in 1982. His Los Alamos tenure included receiving a Patent of the Year Award.

04 · Government-supported R&D

Multiple SBIR programs and technology development

Experience includes multiple SBIR-supported cryogenic technology efforts and taking concepts from lab-scale prototypes toward industrial systems.

Reference Documentation

Selected publications.

Each summary links to the supporting publication.

WORLD RECORD

100 K temperature span

A 2019 Applied Energy paper co-authored by Barclay reported a 100 K temperature span and described it as the largest reported in the literature at that time.

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FIRST

Propane liquefaction by magnetic refrigeration

A 2019 Cryogenics paper reported the first demonstration of propane liquefaction using an active magnetic regenerative liquefier. The work used a single-stage system with a single magnetic refrigerant.

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FIRST · MULTILAYER

Methane liquefaction after cooling from 295 K to 135 K

A 2022 Cryogenics paper reported the first successful liquefaction of pure methane using an active magnetic regenerative refrigerator with four magnetic refrigerants layered across the temperature span.

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