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Experimental evaluation of a compressive elastocaloric cooling system.

Number: pap. 2385

Author(s) : QIAN S., WANG Y., GENG Y., et al.

Summary

Elastocaloric cooling has been recognized as the most potential technology to compete with the state-of-the-art vapor compression cooling systems. The elastocaloric effect refers to the latent heat associated with the stress-induced martensitic phase transformation process in shape memory alloys (SMA). In this paper, the latest test results of a previously developed elastocaloric cooling system are demonstrated. Since the first generation prototype resulted in the system temperature lift of 1.5 K and cooling capacity of 38 W, the following system design modifications were made to improve system performance. Better alignment of linear actuator to SMA tubes enabled more SMA tubes per bed. Plastic tubing in loading heads reduced the heat loss. In addition, inserting plastic blocks inside SMA tubes reduced heat transfer fluid residing inside each Ni-Ti tube and reduced the cyclic loss associated with periodic heating and cooling of the heat transfer fluid. After applying these modifications to the system, the system temperature lift was improved to 4.7 K. Furthermore, 6.1 K system temperature lift was predicted when assuming no pump’s parasitic heat generation and no heat conduction loss to the supporting frame in each bed.

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Pages: 8 p.

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Details

  • Original title: Experimental evaluation of a compressive elastocaloric cooling system.
  • Record ID : 30018740
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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