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Dynamic performance of a compression thermoelastic cooling air conditioner under cyclic operation mode.

Number: pap. 2244

Author(s) : QIAN S., LING J., HWANG Y., et al.

Summary

Traditional vapor compression cooling refrigerants are considered to have high global-warming-potential (GWP), which face more and more legislation pressure nowadays. As an alternative option other than using low GWP refrigerants and natural refrigerants, solid-state cooling technologies show their advantages of zero GWP, and therefore recently attract more attentions. Apart from those well-studied solid-state cooling technologies, such as thermoelectric cooling, thermoacoustic cooling and magnetic cooling, thermoelastic cooling, a.k.a. elastocaloric cooling, is still under development and shows potential of better thermal performance compared with its competitors. In fact, from material perspective, it was estimated by literatures that the COPs for elastocaloric materials are 20% - 120% higher than other solid-state cooling materials under the same operating conditions. This study introduces the thermoelastic cooling concept at the beginning, and then demonstrates one method to operate the compression thermoelastic cooling cycle for air-conditioning application based on the reverse Martensitic phase transition principle. A dynamic model is developed to measure the temperature within the cycle under cyclic operation mode. The cyclic operation is a reversed Brayton cycle consisting of an adiabatic Martensite-Austenite phase transition process, a constant strain heat transfer process between the solid-state refrigerant and the heat sink/source, and a heat recovery process aiming to improve the overall performance. The model uses experimental curve-fitted data to predict the work required to drive the cycle. Based on the model, cooling COP of 4 is achievable under a 10K temperature lift case.

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Pages: 9 p.

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Details

  • Original title: Dynamic performance of a compression thermoelastic cooling air conditioner under cyclic operation mode.
  • Record ID : 30013237
  • Languages: English
  • Source: 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2014/07/14

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