skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Investigation of bypass fluid flow in an active magnetic regenerative liquefier

Abstract

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 imbalance 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. In the present work, the net cooling power of an active magnetic regenerative liquefier is investigated as a function of the bypass flow fraction. In conclusion, experiments are performed at a fixed temperature span yielding a 30% improvement in net cooling power, affirming the potential of bypass flow in active magnetic regenerative liquefiers.

Authors:
 [1]; ORCiD logo [2];  [1];  [1];  [1];  [3];  [4];  [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Victoria, Victoria, BC (Canada)
  3. Emerald Energy NW LLC (EENW), Bothell, WA (United States)
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1439092
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Cryogenics
Additional Journal Information:
Journal Volume: 93; Journal Issue: C; Journal ID: ISSN 0011-2275
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; Magnetocaloric effect; Active magnetic regenerator; Gadolinium; Liquefaction; Bypass flow

Citation Formats

Holladay, Jamelyn, Teyber, Reed, Meinhardt, Kerry, Polikarpov, Evgueni, Thomsen, Edwin, Archipley, Corey, Cui, Jun, and Barclay, John. Investigation of bypass fluid flow in an active magnetic regenerative liquefier. United States: N. p., 2018. Web. doi:10.1016/j.cryogenics.2018.05.010.
Holladay, Jamelyn, Teyber, Reed, Meinhardt, Kerry, Polikarpov, Evgueni, Thomsen, Edwin, Archipley, Corey, Cui, Jun, & Barclay, John. Investigation of bypass fluid flow in an active magnetic regenerative liquefier. United States. doi:10.1016/j.cryogenics.2018.05.010.
Holladay, Jamelyn, Teyber, Reed, Meinhardt, Kerry, Polikarpov, Evgueni, Thomsen, Edwin, Archipley, Corey, Cui, Jun, and Barclay, John. Sat . "Investigation of bypass fluid flow in an active magnetic regenerative liquefier". United States. doi:10.1016/j.cryogenics.2018.05.010.
@article{osti_1439092,
title = {Investigation of bypass fluid flow in an active magnetic regenerative liquefier},
author = {Holladay, Jamelyn and Teyber, Reed and Meinhardt, Kerry and Polikarpov, Evgueni and Thomsen, Edwin and Archipley, Corey and Cui, Jun and Barclay, John},
abstractNote = {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 imbalance 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. In the present work, the net cooling power of an active magnetic regenerative liquefier is investigated as a function of the bypass flow fraction. In conclusion, experiments are performed at a fixed temperature span yielding a 30% improvement in net cooling power, affirming the potential of bypass flow in active magnetic regenerative liquefiers.},
doi = {10.1016/j.cryogenics.2018.05.010},
journal = {Cryogenics},
number = C,
volume = 93,
place = {United States},
year = {Sat May 19 00:00:00 EDT 2018},
month = {Sat May 19 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 19, 2019
Publisher's Version of Record

Save / Share: