• K.Madhusudhana Reddy
• Prof K Prahlada Rao

Vapour compression (VC) is by far the most dominant technology for meeting all cooling and refrigeration needs around the world. It is a mature technology with the efficiency of modern compressors approaching the theoretical limit, but its environmental foot prints remains a global problem as VC cooling refrigerants are considered to have high global warming potential (GWP). As an alternate option other than using low GWP refrigerants and natural refrigerants, Solid-state cooling technologies show their advantage of zero GWP. Elastocaloric cooling technology uses shape memory alloys (SMA), these are a group of metal alloys with significant elastocaloric effect. They can be used for power cycles, or applied reversely for themoelastic cooling/heat pump cycles. Elastocaloric (Thermoelastic ) cooling shows better thermal potential compared with other Solid-state cooling technologies such as Thermoelectric cooling, Thermoacoustic cooling and Magnetic cooling. In this dissertation work Elastocaloric single-stage cooling cycle design options are introduced first. Then analytical coefficient of performance equation is derived for reverse Brayton cycle design. Effects of heat transfer Effectiveness, heat recovery Efficiency and Temperature lift on system COP are investigated under constant cycle duration. A Numerical model is developed to evaluate the Brayton cycle (used NiTi alloy tube as the material for SMA beds) performance under cyclic operation mode. Simple parametric study is conducted to study the role of various operating parameters such as cycle duration, Heat transfer velocity , Heat recovery velocity and geometric parameter such as Wall thickness on system COP and Cooling capacity using MATLAB .

Nitinol,Solid-state Cooling,Shape memory alloy, Elastocaloric cooling

"Analytical And Numerical Model Analysis Of Elastocaloric Cooling Systems", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 10, page no.350-360, October-2017, Available :http://www.jetir.org/papers/JETIR1710058.pdf

"Analytical And Numerical Model Analysis Of Elastocaloric Cooling Systems", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 10, page no. pp350-360, October-2017, Available at : http://www.jetir.org/papers/JETIR1710058.pdf