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Updated: Jan 2, 2026
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Experimental Methods for Investigation of Shape Memory Based Elastocaloric Cooling Processes and Model Validation
Published on: May 2, 2016
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A multistage elastocaloric refrigerator and heat pump with 28 K temperature span
Ryan Snodgrass1, David Erickson2
1Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA.
Scientific Reports
|December 8, 2019
Summary
Staged elastocaloric refrigerators offer a greener cooling alternative. A three-stage system achieved a record 28.3°C temperature span, significantly improving upon single-stage designs for enhanced cooling performance.
Area of Science:
- Thermodynamics
- Materials Science
- Sustainable Energy
Background:
- Elastocaloric (eC) refrigerators present a refrigerant-free alternative to traditional vapor compression systems.
- Current eC devices lack the necessary temperature span for widespread applications like household refrigeration.
- The global warming potential of conventional refrigerants necessitates the development of eco-friendly cooling technologies.
Purpose of the Study:
- To investigate the potential of staging the elastocaloric effect to expand the achievable temperature span in cooling systems.
- To compare the performance of one-stage, two-stage, and three-stage eC cooling systems.
- To establish a new record for the maximum temperature span achieved by an elastocaloric device.
Main Methods:
- Construction and testing of one-stage, two-stage, and three-stage elastocaloric cooling systems.
- Systematic measurement of temperature span under controlled conditions.
- Comparative analysis of performance metrics, including temperature span and coefficient of performance.
Main Results:
- The three-stage elastocaloric system demonstrated a 1.5 times greater maximum temperature span compared to the single-stage system.
- A record temperature span of 28.3°C was achieved with the three-stage system, surpassing the previous record of 19.9°C.
- Multistage systems exhibited comparable temperature spans to single-stage systems but with improved coefficients of performance.
Conclusions:
- Staging the elastocaloric effect is an effective strategy for significantly expanding the temperature span of cooling devices.
- The developed three-stage system represents a substantial advancement in elastocaloric cooling technology.
- Multistage elastocaloric refrigerators offer a promising pathway towards efficient and sustainable cooling solutions with enhanced performance.
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