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CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit 1

CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit 2

CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit 3

CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit 4

CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit 5

CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit 6

CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit 7

CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit 8

CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit 9

CO₂ Transcritical Skid-Mounted Unit – R744 Natural Refrigerant Low-Temperature Quick-Freezing Parallel Refrigeration Unit

The CO₂ transcritical skid-mounted unit manufactured by Qingdao Bingyan Refrigeration Equipment Co., Ltd. is an all-in-one pre-integrated refrigeration system that uses natural carbon dioxide (R744) as the sole refrigerant, differentiating it from conventional refrigeration units charged with ammonia, R404A, R507 and other hydrofluorocarbons.

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Core Design Logic

Fully pre-assembled in factory, the system integrates imported piston compressors, self-developed high-pressure pressure vessels, gas coolers, liquid separation assemblies and intelligent PLC electrical control cabinets, delivered as a fully functional standalone unit. Only water, power and pipeline connections are required on-site to put the unit into operation.Specially engineered for industrial quick-freezing processes, it delivers stable evaporating temperature down to -42°C, tailored for seafood, meat and prepared food quick-freezing production lines. Leveraging transcritical cycle technology with ultra-low Global Warming Potential (GWP), the unit fully complies with EU F-Gas Regulation and global refrigerant phase-down policies, serving as a mainstream eco-friendly and high-efficiency refrigeration solution for the cold chain industry.

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Core Advantages of Transcritical CO₂ Systems

Pure natural working fluid CO₂ (R744) with GWP=1 and zero ozone depletion potential, eliminating policy risks arising from phased production cuts and phase-outs of HFC refrigerants.
Non-toxic and non-flammable; free of poisoning and explosion hazards compared with ammonia systems, making it safer for food processing workshops.
Easily accessible carbon dioxide feedstock with low procurement cost, cutting long-term refrigerant operational expenditure.
Low-carbon credentials facilitate customers’ applications for Green Factory certification and environmental compliance for export products.

High volumetric refrigeration capacity, requiring smaller compressor displacement to meet identical cooling loads.
Low compression ratio maintains high volumetric efficiency of compressors over long runtimes with minimal energy losses.
Superior cooling performance under low ambient temperatures, delivering remarkable energy savings during year-round continuous operation of quick-freezing lines.
High fluid density of CO₂ under high operating pressure allows pipeline diameter reduction by 1/2 ~ 1/3, drastically cutting piping material costs and field installation labor expenses.

Core imported semi-hermetic piston compressors designed to withstand transcritical operating pressure up to 130 bar, ensuring stable performance and extended service life.
Proprietary transcritical optimized circulation loop with enhanced gas cooling heat exchange and throttling logic to boost annual energy efficiency ratio (EER).
Reinforced self-developed high-pressure pressure vessel structure for drastically improved overall unit operational stability.
Customizable intelligent control system with automatic pressure & temperature regulation, real-time fault alarming and optional remote online monitoring.
All components engineered for CO₂ high-pressure service; valves, piping and vessels selected to meet 130 bar pressure rating standards to eliminate leakage risks.

Integrated skid-mounted construction with complete factory pre-assembly, shortening on-site installation duration for fast commissioning and production launch.
Compatible with quick-freezing tunnels, plate freezers and ultra-low temperature cold storage, delivering steady -42°C ultra-low temperature freezing performance.
Low maintenance overhead; no frequent replenishment of costly synthetic refrigerants, delivering significant long-term operational cost savings

Unique Characteristics & Objective Pros & Cons of Transcritical Systems

Exclusive System Characteristics

Extremely high operating pressure: maximum system design pressure rated at 130 bar, all pressure-bearing components undergo high-pressure reinforcement treatment.
High refrigerant fluid density enables compact, lightweight piping layout with reduced pipe sizes.
High fluid volumetric torque requires oversized compressor drive motors matched for supercritical CO₂ operating conditions.

Complete Technical Parameter Sheet

(Calibrated Condition: Gas Cooler Discharge Temperature = 35°C)

Parameter Item	Standard Configuration Specification
Refrigerant	R744 Carbon Dioxide (natural refrigerant, GWP=1)
Compressor Type	Imported semi-hermetic piston compressor
Power Supply	380V/50Hz three-phase (customizable 220V/60Hz for export markets)
Applicable Evaporating Temperature Range	-42°C ~ -10°C, optimized for -42°C quick-freezing duty
Compressor Combination	Multi-parallel unit design; compressors start/stop flexibly per load demand for precise temperature control and energy conservation. Equipped with high-efficiency microchannel condensers with superior high-pressure resistance and heat transfer efficiency; electronic expansion valves for fast response and precise capacity regulation. Integrated intelligent control system supports remote monitoring and automatic fault diagnosis to guarantee stable and reliable system operation. This solution addresses stringent ultra-low temperature freezing requirements while enabling green manufacturing via eco-friendly refrigerants and high EER, making it an ideal option for modern cold chain infrastructure.
Nominal Cooling Capacity Range	216kW ~ 504kW
Max Unit Operating Power	256kW ~ 354.5kW
Maximum System Design Pressure	130 bar
Matching Quick-Freezing Line Throughput	1 t/h, 2 t/h, 2.5 t/h quick-freezing tunnels
Reference Overall Unit Dimension (L × W × H)	6300×2600×1850mm ~ 8250×2700×2000mm
Heat Rejection Method	Air-cooled gas cooler / Water-cooled gas cooler (optional)
Control System	Fully automatic PLC intelligent control, remote monitoring module optional
Safety Protection	Interlock protection against overpressure, overcurrent, overheating and low oil pressure
Supported Certifications	CE, ISO9001, ISO14001, Pressure Vessel Inspection Certificate
Warranty Period	1-year full unit warranty

Wide Application Scenarios

Food Quick-Freezing Industry: Seafood quick-freezing lines, beef & mutton low-temperature freezing, fruit & vegetable IQF production, dumpling & prepared food freezing plants
Cold Chain Logistics: Large-scale ultra-low temperature cold storage, central refrigeration stations, deep-freeze warehouses
Special Industrial Low-Temperature Cooling: Low-temperature storage of pharmaceutical raw materials, cooling for chemical low-temperature reaction kettles
Global Cold Chain Environmental Retrofit Projects: Replacement of legacy high-GWP HFC units (R404A, R507) to meet international refrigerant emission control standards

Why Choose Qingdao Bingyan CO₂ Transcritical Skid-Mounted Units

Specialized R&D and manufacturer of CO₂ transcritical refrigeration systems with independent production qualification for pressure vessels.
One-stop full-service solution: customized cooling capacity design, free system drawing design, full-load factory testing, overseas installation guidance and full lifecycle technical after-sales support.
Every unit undergoes full-load pressure and cooling performance testing prior to shipment to eliminate pipeline leakage and unstable operation issues.
Delivers 20%~35% electricity savings versus conventional HFC parallel piston units under continuous quick-freezing production cycles.
Flexible OEM/ODM customization: adjustable compressor quantity, cooling capacity, overall unit dimensions and electrical control functions to fit customer workshop layouts.
Complete global spare parts supply chain for fast component delivery, minimizing production downtime losses.

Frequently Asked Customer Questions

What are the core differences between a CO₂ transcritical unit and a conventional R404A parallel piston unit?

Conventional R404A is a high-GWP hydrofluorocarbon subject to global phase-down and phase-out regulations, with high long-term refrigerant operational costs. CO₂ transcritical systems adopt natural refrigerant free of environmental policy risks, stably achieve -42°C ultra-low temperatures, deliver prominent energy savings for continuous quick-freezing processes, and feature non-toxic, non-flammable refrigerant for enhanced operational safety.

Is carbon dioxide refrigerant safe for food processing workshops?

Fully compliant and safe. CO₂ is widely adopted across the food manufacturing industry, non-toxic and odorless. Minor refrigerant leaks will not contaminate food materials, with zero risk of combustion or explosion, enabling full regulatory compliance for food factories.

How to resolve insufficient heat rejection for operation in hot tropical regions?

For high-temperature regions including Southeast Asia and the Middle East, we provide customized oversized air-cooled gas coolers or auxiliary water cooling systems to guarantee stable delivery of nominal cooling capacity.

Do you offer installation training for export orders?

English-language operation manuals are supplied with each shipment; 7×24-hour remote video technical support is available. For bulk orders, on-site installation and operational training by field engineers can be arranged.

What certification documents can be provided for export customs clearance?

Complete documentation package including CE certification, ISO9001/14001 system certificates, pressure vessel inspection reports, original manufacturer certificate of origin and full commercial customs declaration paperwork.

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