| dc.description.abstract | The research purpose of this thesis is to accelerate the promotion of Low-GWP environmentally friendly refrigerant product R454B refrigerant, replace the original R410A refrigerant with the highest usage rate, and significantly reduce the greenhouse gas produced by the manufacture of R410a refrigerant.
The research purpose of this thesis is to accelerate the promotion of Low-GWP environmentally friendly refrigerant product R454B refrigerant, replace the original R410A refrigerant with the highest usage rate, and significantly reduce the greenhouse gas produced by the manufacture of R410a refrigerant.
The experimental product selection is the rotary single-cylinder refrigerant compressor, a major product in the air-conditioning industry, and the product orientation is the American light commercial, small and medium-sized outdoor air-cooled separate air-cooled air-cooled unitary for domestic use.
R454B refrigerant is one of the refrigerant with the lowest GWP value among the refrigerants that can replace R410A refrigerant products (GWP value 466, 78% lower than R410A refrigerant, and 31% lower than R32 refrigerant).
The biggest advantage of R454B refrigerant is that there is no need to change the product originally designed with R410A refrigerant, and it has only minimal impact on product performance. It means that the existing R410A product can be used directly after replacing the refrigerant with R454B refrigerant.
After the switching the R410A refrigerant with R454B of the compressor in this experiment, the cooling capacity is slightly reduced and the energy efficiency is improved. It can be used in positive displacement and direct expansion air conditioning compressor, heat pump compressors and cooling compressor.
Therefore, the experiment of this thesis chooses R454B refrigerant as the experimental target, explores the feasibility of directly replacing R410A refrigerant and the data of R454B refrigerant compressor after replacement.
The experimental equipment in this thesis uses the calorimeter to record the data changes of the compressor unit′s refrigeration capacity, EER, mass flow, suction pressure, discharge pressure, suction temperature, and discharge temperature after R410A refrigerant is switched to R454B refrigerant.
The life test equipment was then used to verify the reliability of the compressor after replacing the R454B refrigerant, thereby proving the product reliability of the R454B refrigerant used in rotary single-cylinder compressors.
The experimental results prove that R454B refrigerant can directly replace the existing R410 refrigerant rotary compressor products, and has good compatibility with the RB68EP refrigerant oil used in R410A refrigerant, so there is no need to re-select new refrigerant oil to redesign the end product.
The experimental results of this thesis prove that the existing products designed and developed with R410A refrigerant can be directly replaced with R454B refrigerant, which not only reduces 78% of greenhouse gas emissions, but also saves a lot of development costs and avoids waste of resources. | en_US |