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Title: Characterization of Bypass Fluid Flow in an Active Magnetic Regenerative Liqueer

Journal Article · · International Journal of Refrigeration

Active magnetic regenerators (AMR) with second order magnetocaloric materials operating below the Curie temperature have a unique property where the magnetized specific heat is lower than the demagnetized specific heat. The associated thermal mass unbalance allows a fraction of heat transfer fluid in the cold heat exchanger to bypass the magnetized regenerator. This cold bypassed fluid can precool a process stream as it returns to the hot side, thereby increasing the efficiency of liquefaction and reducing the cost of liquid cryogens. While researchers have been aware of this phenomenon for decades, experimental performance improvements from bypass fluid flow have yet to be reported in open literature. In the present work, the net cooling power of an active magnetic regenerative liquefier is investigated as a function of the bypass ow fraction. Experiments are performed at a fixed temperature span that yield a 25% improvement in net cooling power, affirming the potential of bypass cooling power.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1509859
Report Number(s):
PNNL-SA-130481
Journal Information:
International Journal of Refrigeration, Journal Name: International Journal of Refrigeration
Country of Publication:
United States
Language:
English

References (24)

Development of large-scale hydrogen liquefaction processes from 1898 to 2009 journal May 2010
Large-scale liquid hydrogen production methods and approaches: A review journal February 2018
Simulation on a proposed large-scale liquid hydrogen plant using a multi-component refrigerant refrigeration system journal November 2010
Introducing and energy analysis of a novel cryogenic hydrogen liquefaction process configuration journal March 2017
Analysis and assessment of a novel hydrogen liquefaction process journal April 2017
Magnetic refrigerator for hydrogen liquefaction journal July 2014
Magnetic phase transitions and the magnetothermal properties of gadolinium journal February 1998
Magnetocaloric effect and heat capacity in the phase-transition region journal January 1999
Materials Challenges for High Performance Magnetocaloric Refrigeration Devices journal September 2012
Adapting an active magnetic regenerator to a continuous fluid flow application journal January 2018
Modeling the Active Magnetic Regenerator book January 1992
Design of an Active Magnetic Regenerative Hydrogen Liquefier book January 1992
Active Magnetic Regenerative Liquefier report January 2016
Passive force balancing of an active magnetic regenerative liquefier journal April 2018
Experimental performance investigation of an active magnetic regenerator subject to different fluid flow waveforms journal February 2017
Performance assessment of different porous matrix geometries for active magnetic regenerators journal February 2017
Magnetic refrigeration: Single and multimaterial active magnetic regenerator experiments journal February 2004
Experimental investigation of a three-material layered active magnetic regenerator journal December 2006
Experimental investigation of two-stage active magnetic regenerative refrigerator operating between 77K and 20K journal October 2013
Design method of the layered active magnetic regenerator (AMR) for hydrogen liquefaction by numerical simulation journal September 2015
Development of the active magnetic regenerative refrigerator operating between 77 K and 20 K with the conduction cooled high temperature superconducting magnet journal December 2017
Review on numerical modeling of active magnetic regenerators for room temperature applications journal May 2011
Numerical analysis of active magnetic regenerators for hydrogen magnetic refrigeration between 20 and 77K journal June 2011
Thermal analysis of a multistage active magnetic regenerator cycle for hydrogen liquefaction journal February 2018

Cited By (1)

Energy Applications of Magnetocaloric Materials journal March 2020

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