What question did this study set out to answer?

The aim is to evaluate the cooling capacity and thermal performance of a cascade refrigeration system using R513A and R744.

April 7, 2026Open Access

Evaluation on the Cooling capacity of a Cascade Cold Storage Refrigeration System Using Refrigerant Pair R513A/R744

Key Points

The aim is to evaluate the cooling capacity and thermal performance of a cascade refrigeration system using R513A and R744.
Experimental setup to assess thermodynamic properties
Comparison of low and high temperature cycles
Data collection at an ambient temperature of 32°C
Cold room temperature decreased from 32°C to -20°C in 35 minutes
Cooling capacity measured at 1.35 kW
Overall coefficient of performance (COP) reached 2.0
Experimental data aligned with theoretical results, with a differential error of less than 10%

Abstract

This paper presented in a cascade cold storage refrigeration system using a R513A/R744 pair by the experimental method.The R744 refrigerant was used for the low temperature cycle (LTC) and R513A was used for the high temperature cycle (HTC).The experimental data on the thermodynamic properties were collected at an ambient temperature of 32 o C. Following this study, the thermal parameters of those refrigerants in CRS were indicated detailly, the temperature of cold room was gone from 32 o C down to -20 o C in 35 minutes.The R744 refrigerant in LTC has a condensing temperature of 5.9 o C and an evaporating temperature of -25 o C, experimenting with the cooling capacity reached 1.35 kW and the overall COP reached 2.0.Moreover, those theory results are suitable with experimental data, the differential error is less than 10%.

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Cite This Study

Le et al. (Sun,) studied this question.

synapsesocial.com/papers/69d49ecbb33cc4c35a227834 https://doi.org/https://doi.org/10.5109/7411075

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