Introduction Due to energy needs, all countries in the world are studying and developing new types of energy and energy saving techniques [1]. Cooling is the largest demand for electricity consumption in the world, and the synthetic refrigerants used by most cooling appliances contribute significantly to climate change and ozone depletion [2]. Ozone depletion and global warming (or, more precisely, climate change) represent major environmental concerns with serious implications for the future development of refrigeration-based industries. The need to reduce greenhouse gas emissions is not yet fully understood [3]. Growing international concern about refrigerants with relatively high global warming has motivated the investigation of low global warming alternatives for HFCs in a household refrigerator [4]. Halogenated refrigerants used in vapor compression refrigeration, air conditioning and heat pump systems cause greenhouse gas emissions which, in turn, contribute significantly to global warming. An effective solution to reduce this type of greenhouse gas emissions is the use of environmentally friendly and energy-efficient refrigerants [5]. LPG is an alternative substance that is acceptable from an environmental and economic point of view, its use as a refrigerant in domestic refrigerators is very interesting [6]. Although HC refrigerants have highly flammable (A3) characteristics according to ASHRAE standards as a negative specification, they not only have several preferable specifications such as zero ODP, very low global warming, non-toxicity and higher performance than other types of refrigerant, but also feature high miscibility with mineral oils and good compatibility with existing refrigeration systems. They are us...... half of the sheet...... s (3m, 3.5m, 4m, 4.5m and 5m) are used. A series of five manual shut-off valves were attached before the five capillary tubes to direct the flow from the dryer to the required capillary type. The ends of the capillary tubes were connected by a distributed arrangement by brazing on a common tube in leading the arrangement onto the evaporator. Temperatures at the salient points were measured by calibrated RTD sensors (PT-100). The total energy consumption of the system and the compressor is measured by a digital energy meter. The COP of the domestic refrigerator was estimated with the help of an insulated calorimeter consisting of a steel drum having exactly the same length as the evaporator used in a domestic refrigerator. The calorimeter is filled with a salt solution as a secondary coolant. The experimental setup is shown in the figure 1