Characterization of Bypass Fluid Flow in an Active Magnetic Regenerative Liqueer
- BATTELLE (PACIFIC NW LAB)
- Iowa State University
- MULTIPLE CONTRACTORS
- Emerald Energy NW, LLC
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
Energy Applications of Magnetocaloric Materials
|
journal | March 2020 |
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