NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously designed with two distinct stages: the high-temperature stage utilizing NH3 as the refrigerant, and the low-temperature stage employing CO2. The high-temperature NH3 system condenses CO2 gas from the low-temperature stage via an advanced condensation evaporator, which serves as both the condenser for the CO2 and the evaporator for the NH3. This unified design ensures efficient heat transfer and seamless operation across temperature levels.
In this system, heat absorbed by the CO2 refrigerant at the end evaporator is efficiently transferred to the high-temperature NH3 refrigerant through the condensation evaporator. The NH3 refrigerant then releases the heat to the external environment via a high-temperature condenser and cooling medium. The condensed CO2 moves into a CO2 reservoir and then a gas-liquid separator after passing through a dryer filter and throttle valve. Liquid CO2 is pumped to the CO2 evaporator, where it returns as two-phase CO2 and is compressed by the compressor, repeating the cycle for a continuous cascade refrigeration process.
The NH3/CO2 cascade refrigeration system leverages separate single refrigerant systems for both high and low temperature levels. The high-temperature NH3 system, similar to conventional setups, includes a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. Meanwhile, the low-temperature CO2 system encompasses a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
The CO2 gas-liquid separator is crucial for efficiently separating CO2 gas droplets from the evaporator within the CO2 compression refrigeration system. This component prevents compressor wet strokes, maintains stable liquid levels during pump operation, and stores end equipment and pipeline liquid returns when the pump stops. When used as a CO2 reservoir during non-operation periods, its volume must accommodate all system CO2 liquid. Additionally, an auxiliary evaporator is installed to prevent excessive CO2 pressure post-shutdown. The NH3/CO2 condensing evaporator functions dually as the NH3 side evaporator and CO2 side condenser, facilitating effective heat absorption and CO2 condensation.
2. Advantages of NH3/CO2 Cascade Refrigeration System
(1) Enhanced NH3 Safety Measures:
(1.(1)) The NH3/CO2 cascade refrigeration system significantly reduces NH3 condensation pressure, requiring only about 1/10th of the traditional ammonia refrigeration system charge.
(1.(2)) NH3 is confined to designated areas such as machine rooms and equipment rooms, akin to a 'tiger in a cage,' monitored by skilled personnel.
(1.(3)) Optimal use of NH3's superior heat transfer properties in high-temperature regions to effectively cool CO2.
(2) Utilizing CO2 as a Refrigerant: CO2 can safely enter personnel-dense operational areas and storage facilities, ensuring the safety of both personnel and property.
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| Compressor type |
Piston, screw |
| Condensor |
enough condenser heat exchanger surface |
| Fan type |
Axial fan:High degree of protection, large Air flow, low noise |
| Unit kinds |
Open type, box type, side discharge type |
| Cooled type |
Air cooled |
| Refrigeration type |
R717;R507;R22;CO2 |
| Copper tube connector |
fitting reducer |
| Place to assemble |
Indoor/out door(concrete construction building/steel
construction building). |
| Voltage |
220V/50HZ, 220V/60HZ, 380V/50HZ etc |
| Controller |
Automatic electric controller, PLC |
| Warranty |
1 Year |
| Case material |
The galvanized sheet is coated with plastic powdered painted |
| Quality Assurance |
2.6Mpa leak-proof stress test |
| Package |
Plywood box and pallet |
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, nestled in the picturesque coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is a pioneering high-tech enterprise that seamlessly integrates industrial and commercial freezing, cold storage, refrigeration systems, and refrigeration equipment. We specialize in the research, development, design, manufacturing, and sales of top-tier refrigeration solutions.
From its inception, our company has steadfastly adhered to a philosophy where 'science and technology' lead the way, and 'management' ensures excellence. Our unwavering goal is to meet market demands and deliver unparalleled customer service, offering flawless refrigeration system solutions, premium products, and unmatched services.
Boasting over ten national technology patents, we are perpetually committed to the research and development of high-efficiency, energy-saving, and environmentally friendly refrigeration systems. Our product lineup includes high-efficiency refrigeration units, energy-saving barrel pumps, and advanced PLC intelligent program control boxes, all designed to meet the highest standards.
Our expertise extends to the program design and customization of equipment for a variety of projects including food quick-freezing storage, food cold storage, ultra-low temperature cold storage, medical storage, fruit and vegetable air-conditioning storage, workshop air conditioning, quick-freezing and freeze-drying, and thawing devices.
BINGYAN IS PASSIONATELY DEDICATED TO DELIVERING SCIENTIFICALLY ADVANCED AND REASONABLY PRICED REFRIGERATION SYSTEM SOLUTIONS. WE OFFER NOT ONLY TOP-NOTCH ENGINEERING BUT ALSO EXCEPTIONAL AFTER-SALES SERVICES.
Bingyan delivers a holistic suite of services encompassing sales, meticulous design, precise construction, and exemplary after-sales support.
1. Our sales department is adept at accurately discerning and comprehending customer needs. We ensure that customer intentions are conveyed with precision and maintain smooth, ongoing communication.
2. The design department provides customers with expert, well-reasoned engineering recommendations. We create customized, reliable, and stable refrigeration plans tailored to each customer's specific requirements.
3. Our engineering department approaches every construction process with utmost seriousness and attention to detail. We meticulously complete each task, striving for excellence to deliver projects of the highest quality.
4. The after-sales department remains ever-ready and on standby to guarantee customer success at every stage.
Q:What's your advantage?
A: Our professional designers tailor solutions to your specific needs, ensuring the selection of optimal refrigeration equipment. This results in high cooling efficiency, significant energy savings, and lower power consumption.
Q: How strong is your company?
A: Established in 2011, our company boasts a skilled cold storage design team, an expert installation crew, and experienced after-sales maintenance personnel. We offer comprehensive services including cold storage design, installation guidance, and top-tier after-sales maintenance.
Q:Where are you located? Can I visit you?
A: Absolutely, you are always welcome to visit our factory at your convenience.
Q:How about the delivery time?
A: Delivery is typically within 60 days after your requirements are confirmed.
Q:What kind of payment does your company support?
A: We generally require a 30% down payment via T/T after the Proforma Invoice (PI) is confirmed. The remaining balance is due after inspection and prior to shipment. We accept telegraphic transfer and sight letters of credit.
Q: When can I get the price?
A: We usually provide a quote within 24 hours of receiving your inquiry.
Q: Which shipping methods can you provide?
A: We offer shipping by sea, air, and express courier services.
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