• Ansh Singh
• Amandeep Kushwaha
• Gaurav Jain
• Aditi Ahlawat
• Altaf Hussain, Prateek Yadav

In this paper, thermodynamic performance comparison based on first law of thermodynamics for the following refrigeration cycles: Two Stage with Expander (TSE) and Two Stage with an Expansion Valve (TSEV) using Ethane has been carried out. The effect of operating parameters such as gas cooler exit and evaporator temperatures on optimum values gas cooler and intermediate pressure on the coefficient of performance (COP) has been in-vestigated and comparison is done between both cycles. The TSE cycle had higher COP over the TSEV cycle for all studied conditions. Replacing the expansion valve with an expander resulted in lower gas cooler pressure and intermediate pressure for all studied conditions. The temperature of refriger-ant the exit of high pressure stage compressor is almost similar for both TSE and TSEV cycles. The analysis is performed while simultaneously optimising the gas cooler and intermediate pressures. Temperature of evaporator and gas cooler exit is differed between 0C to -30C and 35 - 50C, respectively. An optimum gas cooler and intermediate pressure can be obtained to maximise the performance of cycle. The TSE cycle yields average 31.73% and highest 38.64% COP improvement over the TSEV cycle when the gas cooler exit temperature varies between 35C to 50C. The gas cooler exit temperature and efficiency of compressor majorly determine the performance of the cy-cle. A performance improving device should minimize the gas cooler outlet temperature and reduce cycle’s operating pressures which would also help ensure safer operation. The results of this analysis are aimed to provide basis for system design and optimization of Ethane based refrigeration system.

Transcritical cycle, Ethane, Expander, Refrigeration, Two stage

"Thermodynamic analysis of two-stage transcritical Ethane refrigeration cycle with an expander", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 11, page no.53-61, November-2024, Available :http://www.jetir.org/papers/JETIRGP06006.pdf

"Thermodynamic analysis of two-stage transcritical Ethane refrigeration cycle with an expander", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 11, page no. pp53-61, November-2024, Available at : http://www.jetir.org/papers/JETIRGP06006.pdf