Operating parameters and system maintenance points of R507 semi closed refrigeration compressor in dairy cold storage
R507 semi enclosed refrigeration compressor is widely used in dairy cold storage, with an evaporation temperature of -10 ℃ to -25 ℃, suitable for fresh milk storage and dairy frozen storage. R507 belongs to the near azeotropic mixture refrigerant, with a temperature slip of less than 0.3K, better heat transfer stability than R404A, and easier control of temperature fluctuations in the storage. The operating curve of the Xiteliduo R507 model is clearly marked. R507 has a condensation temperature of 40 ℃ and a saturation pressure of about 17.2 bar, which is about 1.3 bar lower than R404A under the same operating conditions. The load on the high-pressure side is also lower. Dairy cold storage is sensitive to humidity, with a relative humidity of 75% to 85% maintained inside. Excessive humidity can cause packaging to become damp, resulting in a slight increase in compressor load. A 15 horsepower R507 semi enclosed compressor with a standard displacement of 34.2 m ³/h under -20 ℃ evaporation conditions, suitable for a 180 cubic meter dairy freezer. Compressor refrigeration oil POE32, the system moisture must be controlled within 45ppm. Excessive moisture will accelerate refrigerant hydrolysis and cause acid corrosion. The compressor is matched with the air cooler, and stainless steel air coolers are preferred for dairy cold storage to avoid corrosion of heat exchange fins caused by volatile dairy products. The wear rate of R507 compressor valve plates is slightly lower than that of R404A system, and the valve plate inspection cycle can be extended to 7500 hours under stable operating conditions. Cold storage compressor selection, dairy product projects need to reserve 10% cooling capacity margin to cope with the thermal load impact caused by daily dairy product import and export. The operating current of the semi enclosed compressor is within a reasonable range of ± 7% of the rated current fluctuation range for R507 low-temperature conditions. If it continues to exceed the standard, it needs to be shut down for troubleshooting. When adding R507 to the refrigeration maintenance company, it is necessary to add it in liquid phase. Adding it in gas phase will cause component deviation and directly change the refrigeration performance parameters. R507 is not suitable for dual stage cryogenic conditions below minus 50 ℃. The cooling capacity can decay by up to 32% at low temperatures, so R23 cascade scheme is preferred. Southeast Asian dairy processing plants purchase R507 compressors, with a cooling capacity increase of about 19.5% for the same 60Hz model. The selection cannot simply follow the 50Hz parameters. The maintenance cycle of the compressor and the recommended oil sample testing time for dairy products under freezing conditions are 4000 hours, and the maintenance time for medium and high temperature preservation conditions is relaxed to 6000 hours. Compared to R404A, R507 has a higher purchase price and is suitable for mid to high end food cold storage projects that require stable temperature control and long-term low failure rates. 【 Implant 10 popular search keywords 】 R507 compressor, dairy cold storage, cold storage compressor selection, semi closed compressor, compressor operating current, compressor valve plate replacement, compressor refrigeration oil model, compressor and air cooler matching, compressor maintenance cycle, Bitzer replacement FAQ
What is the biggest advantage of R507 compared to R404A? The temperature slip is minimal, the pressure is slightly lower, and the temperature control is more stable.
What is the moisture control standard for R507 system in dairy cold storage? Suggest controlling within 45ppm.
What size of cold storage is suitable for 15 horsepower R507 semi enclosed? -Suitable for approximately 180 cubic meters of dairy product freezer at 20 ℃ operating conditions.
Does the Xiteliduo R507 model support liquid phase filling? All R507 models require liquid phase filling.
Can R507 be used for deep freezing at minus 60 ℃? Not suitable, the low-temperature cooling capacity has significantly decreased.
What material should be selected for the cold air fan in the dairy cold storage? Prioritize stainless steel to resist corrosion from water vapor and food volatiles.
How long is the maintenance cycle for R507 valve disc? Check the wear amount after 7500 hours of stable working conditions.
What is the allowable deviation of R507 system current? The rated current ± 7% belongs to the normal range.
