Screw refrigeration compressor delivers cooling capacity from 320kW to 1800kW. It is widely used in large cold storage, ice plants, chemical process cooling and centralized refrigeration stations.
Screw refrigeration compressor achieves 84% volumetric efficiency at rated evaporation temperature of -10℃. Its rotor swept volume spans 200 m³/h to 950 m³/h at 2960rpm rated operating speed.
The unit can sustain stable continuous operation when ambient temperature fluctuates between 5℃ and 45℃. Crankcase heater power is set at 250W to prevent refrigerant migration and oil dilution during standby.
Rotor bearing overhaul cycle of screw refrigeration compressor is 12000 operating hours. System impurities exceeding 30ppm will shorten usable service life by more than 30%.
xiteliduo screw refrigeration compressor models adopt high-strength cast iron rotor housing. The rotor assembly can withstand continuous maximum discharge pressure up to 2.6MPa.
Compared with large 6-cylinder reciprocating refrigeration compressor at 480kW full load, screw refrigeration compressor has 2.3% lower energy consumption under steady continuous full-load operation.
The floor footprint of screw refrigeration compressor is 2.0㎡ for 480kW model, which is 11% larger than large 6-cylinder reciprocating refrigeration compressor of equal cooling capacity.
Recommended lubricating oil grade for screw refrigeration compressor is ISO VG68. Oil cleanliness must maintain NAS 6 grade or better to protect rotors and bearings.
The starting current of screw refrigeration compressor reaches 1.8 times rated current. The contactor shall be sized at 1.2 times rated current to avoid electrical component burnout.
Liquid receiver volume for screw refrigeration compressor systems shall be 1.2 times total refrigerant charge. This measure suppresses liquid slugging during start-stop cycles.
Oil filter inspection must be conducted every 3000 working hours. Filter blockage over 50% lifts oil pressure drop and reduces actual cooling capacity of screw refrigeration compressor by 12%.
Many procurement engineers compare screw refrigeration compressor with reciprocating piston compressors. It dominates large-capacity stable 24h continuous refrigeration scenarios.
Single-stage reciprocating refrigeration compressor is suitable for capacity below 480kW and fluctuating loads, with better efficiency under partial load.
Screw refrigeration compressor can run 24 hours continuously per day for large cold storage and ice plants. Annual maintenance downtime accounts for roughly 2.8% of total operating time.
Compatible refrigerants include R404A, R507A and R134a. It is not recommended for evaporation temperature below -40℃.
Noise level measured at 1 meter from screw refrigeration compressor is 84dB(A). Fitting an acoustic enclosure reduces noise reading by 12dB(A) to satisfy factory environmental limits.
Long operation above rated discharge temperature cuts total usable life by nearly 30% within two years for screw refrigeration compressor.
Safety relief valve of screw refrigeration compressor activates at 2.7MPa. Annual calibration is mandatory to ensure valve response time stays within 0.3s during sudden pressure spikes.
Condenser matching for screw refrigeration compressor shall hold condensing temperature from 38℃ to 45℃. Each 5℃ rise in condensing temperature reduces cooling capacity by approximately 8%.
Rotor clearance monitoring is required during scheduled overhaul. When clearance exceeds 0.18mm, volumetric efficiency drops below 76% and screw refrigeration compressor cannot maintain design load.
xiteliduo screw refrigeration compressor uses precision twin helical rotors. Slide valve enables stepless continuous capacity regulation from 25% to 100% load.
Oil injection cooling cools rotors during compression process and reduces discharge temperature effectively, which is a core feature of screw refrigeration compressor.
Bearing temperature alarm threshold is set at 88℃. The control system triggers power cut once temperature exceeds 95℃ to prevent rotor seizure and permanent mechanical damage.
Transportation tilt angle of screw refrigeration compressor cannot exceed 10 degrees. Steeper tilt lets lubricating oil flood rotor cavities and trigger liquid hammer at initial startup.
Matched oil separator needs separation efficiency ≥99.8%. Oil carry-over rate higher than 0.2% contaminates heat exchanger surfaces and reduces heat transfer coefficient by 16% within 12 months.
Maintaining stable suction superheat of 5K to 8K prevents liquid return and maximizes cooling capacity of screw refrigeration compressor.
Installation foundation concrete grade must be C30 or higher. Foundation settlement exceeding 0.2mm per year causes rotor misalignment and abnormal vibration.
Full-load motor power factor of screw refrigeration compressor reaches 0.86. Installing reactive power compensation capacitors can reduce electricity cost by 5% to 7%.
A well-maintained refrigeration system with screw refrigeration compressor shall keep annual refrigerant leakage below 0.5%. Leakage over 3% requires full pressure test and seal replacement.
For shutdown periods longer than 6 months, oil change and nitrogen sealing are required. Without preservation work, internal rotor rust risk increases by 50%.
Annual maintenance cost of screw refrigeration compressor accounts for roughly 3.4% of equipment purchase price. Large 6-cylinder reciprocating refrigeration compressor annual maintenance cost stays around 3.3%.
Motor insulation class of xiteliduo screw refrigeration compressor model is Class F, with maximum allowable winding temperature of 155℃. It withstands 110% rated current overload for up to 30 minutes.
Evaporation pressure sensor requires annual calibration. Sensor deviation exceeding 0.05MPa disturbs control logic and destabilizes screw refrigeration compressor working condition.
During system retrofitting, verify pipe diameter before connecting screw refrigeration compressor. Suction pipe flow velocity shall remain 10 m/s to 16 m/s to guarantee reliable oil return.
Reciprocating piston compressors (small/medium/large 4-cylinder, large 6-cylinder) cover cooling loads from 35kW to 480kW, best for fluctuating partial loads.
Single-unit two-stage refrigeration compressor operates at evaporation temperature range of -40℃ to -70℃, which is outside the preferred working range of screw refrigeration compressor.
Cascade refrigeration unit achieves temperatures below -70℃ with dual independent refrigerant circuits, but it is a completely separate cryogenic solution.
Screw refrigeration compressor gains energy-saving advantage when running continuously at full load above 320kW. Piston compressors perform better under variable partial load.
Twin rotors of xiteliduo screw refrigeration compressor adopt nitrided steel for high wear resistance and stable performance under long continuous operation.
Suction manifold pressure drop of screw refrigeration compressor must stay below 0.02MPa. Excessive pressure drop reduces rotor filling ratio and volumetric efficiency.
Continuous monitoring of oil pressure differential is necessary. Normal oil pressure difference ranges from 0.25MPa to 0.45MPa. Pressure difference below 0.18MPa indicates potential oil pump failure.
Minimum continuous running time after startup is 2 minutes. Shutdown before this threshold leads to poor oil return and accelerates rotor and bearing wear.
Explosion-proof customized screw refrigeration compressor motor reaches Ex d II BT4 grade. Explosion-proof modification increases equipment cost by roughly 25%.
Condenser fouling factor shall stay under 0.00017 m²·K/W. Fouling factor reaching 0.0003 raises condensing temperature and reduces cooling capacity of screw refrigeration compressor by 10%.
Allowable power supply voltage fluctuation for screw refrigeration compressor is ±10% rated voltage. Voltage drop exceeding 12% triggers frequent motor overload protection.
FAQ
Q: What cooling capacity range does screw refrigeration compressor cover?
A: Standard cooling capacity ranges from 320kW to 1800kW under rated refrigeration compressor working condition.
Q: What lubricant is recommended for xiteliduo screw refrigeration compressor?
A: ISO VG68 refrigeration oil, oil cleanliness must reach NAS 6 grade or higher.
Q: Can screw refrigeration compressor work at evaporation temperature of -40℃?
A: Not recommended. Its optimal working evaporation temperature is above -25℃. Choose single-unit two-stage for -40℃ and below.
Q: What is the bearing overhaul cycle for screw refrigeration compressor?
A: Continuous inspection every 3000 hours; bearing overhaul after 12000 normal operating hours.
Q: What is the unique capacity adjustment feature of screw refrigeration compressor?
A: Slide valve for stepless capacity regulation from 25% to 100%, smoother than cylinder unloading on piston compressors.
Q: Can screw refrigeration compressor replace large 6-cylinder reciprocating refrigeration compressor?
A: Yes for stable 24h full load above 480kW; piston is better if cooling load fluctuates frequently.
Q: What foundation concrete grade is required for screw refrigeration compressor?
A: C30 or higher concrete foundation to handle rotor dynamic vibration and prevent settlement.
Screw Refrigeration Compressor: Large-Capacity Rotary Compressor for Stable 24h Continuous Cold Storage & Ice Making
Screw refrigeration compressor delivers cooling capacity from 320kW to 1800kW. It is widely used in large cold storage, ice plants, chemical process cooling and centralized refrigeration stations. Screw refrigeration compressor achieves 84% volumetric efficiency at rated evaporation temperature of -10℃. Its rotor swept volume spans 200 m³/h to 950 m³/h at 2960rpm rated operating speed. The unit can sustain stable continuous operation when ambient temperature fluctuates between 5℃ and 45℃. Crankcase heater power is set at 250W to prevent refrigerant migration and oil dilution during standby. Rotor bearing overhaul cycle of screw refrigeration compressor is 12000 operating hours. System impurities exceeding 30ppm will shorten usable service life by more than 30%. xiteliduo screw refrigeration compressor models adopt high-strength cast iron rotor housing. The rotor assembly can withstand continuous maximum discharge pressure up to 2.6MPa. Compared with large 6-cylinder reciprocating refrigeration compressor at 480kW full load, screw refrigeration compressor has 2.3% lower energy consumption under steady continuous full-load operation. The floor footprint of screw refrigeration compressor is 2.0㎡ for 480kW model, which is 11% larger than large 6-cylinder reciprocating refrigeration compressor of equal cooling capacity. Recommended lubricating oil grade for screw refrigeration compressor is ISO VG68. Oil cleanliness must maintain NAS 6 grade or better to protect rotors and bearings. The starting current of screw refrigeration compressor reaches 1.8 times rated current. The contactor shall be sized at 1.2 times rated current to avoid electrical component burnout. Liquid receiver volume for screw refrigeration compressor systems shall be 1.2 times total refrigerant charge. This measure suppresses liquid slugging during start-stop cycles. Oil filter inspection must be conducted every 3000 working hours. Filter blockage over 50% lifts oil pressure drop and reduces actual cooling capacity of screw refrigeration compressor by 12%. Many procurement engineers compare screw refrigeration compressor with reciprocating piston compressors. It dominates large-capacity stable 24h continuous refrigeration scenarios. Single-stage reciprocating refrigeration compressor is suitable for capacity below 480kW and fluctuating loads, with better efficiency under partial load. Screw refrigeration compressor can run 24 hours continuously per day for large cold storage and ice plants. Annual maintenance downtime accounts for roughly 2.8% of total operating time. Compatible refrigerants include R404A, R507A and R134a. It is not recommended for evaporation temperature below -40℃. Noise level measured at 1 meter from screw refrigeration compressor is 84dB(A). Fitting an acoustic enclosure reduces noise reading by 12dB(A) to satisfy factory environmental limits. Long operation above rated discharge temperature cuts total usable life by nearly 30% within two years for screw refrigeration compressor. Safety relief valve of screw refrigeration compressor activates at 2.7MPa. Annual calibration is mandatory to ensure valve response time stays within 0.3s during sudden pressure spikes. Condenser matching for screw refrigeration compressor shall hold condensing temperature from 38℃ to 45℃. Each 5℃ rise in condensing temperature reduces cooling capacity by approximately 8%. Rotor clearance monitoring is required during scheduled overhaul. When clearance exceeds 0.18mm, volumetric efficiency drops below 76% and screw refrigeration compressor cannot maintain design load. xiteliduo screw refrigeration compressor uses precision twin helical rotors. Slide valve enables stepless continuous capacity regulation from 25% to 100% load. Oil injection cooling cools rotors during compression process and reduces discharge temperature effectively, which is a core feature of screw refrigeration compressor. Bearing temperature alarm threshold is set at 88℃. The control system triggers power cut once temperature exceeds 95℃ to prevent rotor seizure and permanent mechanical damage. Transportation tilt angle of screw refrigeration compressor cannot exceed 10 degrees. Steeper tilt lets lubricating oil flood rotor cavities and trigger liquid hammer at initial startup. Matched oil separator needs separation efficiency ≥99.8%. Oil carry-over rate higher than 0.2% contaminates heat exchanger surfaces and reduces heat transfer coefficient by 16% within 12 months. Maintaining stable suction superheat of 5K to 8K prevents liquid return and maximizes cooling capacity of screw refrigeration compressor. Installation foundation concrete grade must be C30 or higher. Foundation settlement exceeding 0.2mm per year causes rotor misalignment and abnormal vibration. Full-load motor power factor of screw refrigeration compressor reaches 0.86. Installing reactive power compensation capacitors can reduce electricity cost by 5% to 7%. A well-maintained refrigeration system with screw refrigeration compressor shall keep annual refrigerant leakage below 0.5%. Leakage over 3% requires full pressure test and seal replacement. For shutdown periods longer than 6 months, oil change and nitrogen sealing are required. Without preservation work, internal rotor rust risk increases by 50%. Annual maintenance cost of screw refrigeration compressor accounts for roughly 3.4% of equipment purchase price. Large 6-cylinder reciprocating refrigeration compressor annual maintenance cost stays around 3.3%. Motor insulation class of xiteliduo screw refrigeration compressor model is Class F, with maximum allowable winding temperature of 155℃. It withstands 110% rated current overload for up to 30 minutes. Evaporation pressure sensor requires annual calibration. Sensor deviation exceeding 0.05MPa disturbs control logic and destabilizes screw refrigeration compressor working condition. During system retrofitting, verify pipe diameter before connecting screw refrigeration compressor. Suction pipe flow velocity shall remain 10 m/s to 16 m/s to guarantee reliable oil return. Reciprocating piston compressors (small/medium/large 4-cylinder, large 6-cylinder) cover cooling loads from 35kW to 480kW, best for fluctuating partial loads. Single-unit two-stage refrigeration compressor operates at evaporation temperature range of -40℃ to -70℃, which is outside the preferred working range of screw refrigeration compressor. Cascade refrigeration unit achieves temperatures below -70℃ with dual independent refrigerant circuits, but it is a completely separate cryogenic solution. Screw refrigeration compressor gains energy-saving advantage when running continuously at full load above 320kW. Piston compressors perform better under variable partial load. Twin rotors of xiteliduo screw refrigeration compressor adopt nitrided steel for high wear resistance and stable performance under long continuous operation. Suction manifold pressure drop of screw refrigeration compressor must stay below 0.02MPa. Excessive pressure drop reduces rotor filling ratio and volumetric efficiency. Continuous monitoring of oil pressure differential is necessary. Normal oil pressure difference ranges from 0.25MPa to 0.45MPa. Pressure difference below 0.18MPa indicates potential oil pump failure. Minimum continuous running time after startup is 2 minutes. Shutdown before this threshold leads to poor oil return and accelerates rotor and bearing wear. Explosion-proof customized screw refrigeration compressor motor reaches Ex d II BT4 grade. Explosion-proof modification increases equipment cost by roughly 25%. Condenser fouling factor shall stay under 0.00017 m²·K/W. Fouling factor reaching 0.0003 raises condensing temperature and reduces cooling capacity of screw refrigeration compressor by 10%. Allowable power supply voltage fluctuation for screw refrigeration compressor is ±10% rated voltage. Voltage drop exceeding 12% triggers frequent motor overload protection.
FAQ Q: What cooling capacity range does screw refrigeration compressor cover? A: Standard cooling capacity ranges from 320kW to 1800kW under rated refrigeration compressor working condition. Q: What lubricant is recommended for xiteliduo screw refrigeration compressor? A: ISO VG68 refrigeration oil, oil cleanliness must reach NAS 6 grade or higher. Q: Can screw refrigeration compressor work at evaporation temperature of -40℃? A: Not recommended. Its optimal working evaporation temperature is above -25℃. Choose single-unit two-stage for -40℃ and below. Q: What is the bearing overhaul cycle for screw refrigeration compressor? A: Continuous inspection every 3000 hours; bearing overhaul after 12000 normal operating hours. Q: What is the unique capacity adjustment feature of screw refrigeration compressor? A: Slide valve for stepless capacity regulation from 25% to 100%, smoother than cylinder unloading on piston compressors. Q: Can screw refrigeration compressor replace large 6-cylinder reciprocating refrigeration compressor? A: Yes for stable 24h full load above 480kW; piston is better if cooling load fluctuates frequently. Q: What foundation concrete grade is required for screw refrigeration compressor? A: C30 or higher concrete foundation to handle rotor dynamic vibration and prevent settlement.
