Design, Construction & Refrigeration Test of Refrigeration System Using Different Refrigerant.

Abstract

A refrigeration cycle system utilizing two types of gas can be conceptualized as a thermodynamic setup designed to optimize cooling efficiency across varying temperature ranges. This can either be a cascade system, where two distinct refrigeration loops operate in tandem, each using a refrigerant suited to its respective temperature range, or a mixed refrigerant cycle, which uses a blend of gases to achieve efficient cooling over a broad spectrum within a single loop. This system using R-134a for high-temperature applications and R-600a for low-temperature operations enhances efficiency by optimizing performance across different temperature ranges. R-134a, known for its low global warming potential, performs effectively in moderate to high-temperature conditions, while R-600a, designed as a drop-in replacement for R-22, excels in low-temperature applications due to its favorable thermodynamic properties. The efficiency of such a cascade system is measured by the Coefficient of Performance (COP), which improves by reducing the temperature glide and minimizing compressor work. The combination of these refrigerants ensures energy-efficient operation, particularly in industrial refrigeration, cryogenics, and LNG applications, while adhering to environmental regulations. These systems are particularly advantageous in applications requiring ultra-low temperatures, such as cryogenics, industrial freezers, and liquefied natural gas (LNG) plants.