NH3/CO2 Cascade Refrigeration System
1. The Principle of NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously designed with two distinct temperature stages: a high-temperature stage using NH3 as the refrigerant and a low-temperature stage utilizing CO2. In this setup, the evaporation of NH3 refrigerant in the high-temperature stage is utilized to condense CO2 refrigerant expelled from the low-temperature stage. A condensation evaporator skillfully bridges these stages, acting simultaneously as the condenser for the low-temperature stage and the evaporator for the high-temperature stage, ensuring seamless operation.
Within this sophisticated system, the heat load is efficiently transferred to the CO2 refrigerant through the end evaporator. Subsequently, the heat absorbed by the CO2 is adeptly transferred to the high-temperature NH3 refrigerant via the condensing evaporator. The NH3 refrigerant then passes this heat to the high-temperature condenser, where it is released to the environment through a cooling medium. Condensed CO2 moves into the CO2 reservoir and proceeds to the CO2 gas-liquid separator through a dryer filter and throttle valve. The liquid CO2 is propelled to the evaporator by the CO2 circulation pump—eliminating the need for terminal cooling devices like standalone freezers or chillers. After passing through the evaporator, the two-phase CO2 cycles back to the gas-liquid separator, as the gaseous CO2 is reclaimed by the compressor, compressed, and returned to the condensing evaporator, perfectly completing the cascade refrigeration cycle.
NH3/CO2 Cascade Refrigeration System: A masterful combination, the high and low temperature stages represent independent refrigeration systems, each utilizing a single refrigerant. The high-temperature NH3 system mirrors conventional refrigeration setups, complete with a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. On the other hand, the low-temperature CO2 system incorporates CO2 compressors, condensing evaporators, reservoirs, gas-liquid separators, filter dryers, pumps, throttling devices, evaporators, and expansion vessels, all contributing to a flawless cooling process.
The The CO2 gas-liquid separator is a vital component—it serves to meticulously segregate CO2 gas droplets from the evaporator, preventing compressor wet strokes and maintaining an unwavering liquid level during pump operation. It also stores the liquid from terminal equipment and pipelines when the pump ceases operation. If used as a CO2 reservoir when inactive, its volume should accommodate the entire CO2 liquid content of the system. Additionally, an auxiliary evaporator is positioned atop the gas-liquid separator to effectively manage CO2 pressure post-shutdown. In the NH3/CO2 cascade system, the condensing evaporator doubles as the NH3 side’s evaporator and the CO2 side’s condenser, where compound liquid vaporizes and absorbs heat inside the tube while CO2 gas is condensed into liquid in the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Reduced NH3 Safety Risks:
(1.(1)) The NH3/CO2 cascade system significantly diminishes the condensing pressure of NH3 refrigerant, reducing it to about 1/10th of traditional ammonia systems, enhancing safety greatly.
(1.(2)) NH3 is strategically confined to machine and equipment rooms, akin to safely containing a "tiger in a cage," with professional technicians ensuring vigilance and control.
(1.(3)) Leveraging NH3's exceptional heat transfer capabilities in high-temperature zones to efficiently cool CO2.
(2) Safety of Personnel and Assets: By using CO2 as the medium in areas densely populated with personnel, like operational rooms and warehouses, this system ensures maximum safety for both individuals 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 |
As an esteemed manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. takes pride in offering bespoke solutions tailored precisely to your unique specifications. If you find yourself uncertain about the perfect model for your needs, don't hesitate to reach out. Our dedicated team is ready to assist you in making the ideal choice.Our team consists of several highly skilled engineers who specialize in crafting personalized solutions just for you. Trust us to deliver a customized plan that suits your requirements perfectly, ensuring top-tier performance and satisfaction.
Shandong Binzhou Huiyang Cold Chain Logistics Port
This impressive project spans a vast area of 60,542 square meters, boasting a remarkable total construction area of 72,370.31 square meters. Within this expansive facility, you'll find specially designed production workshops and a state-of-the-art cold storage area covering 65,538.50 square meters. This setup ensures optimal efficiency and functionality.
Our company, Qingdao Bingyan Refrigeration Equipment Co., Ltd., proudly offers a comprehensive product range including State-of-the-Art Condensing Units,High-Performance Air Coolers,Efficient Evaporative Condensers,Advanced Freezers,Durable Cold Room Doors,
Innovative Cold Storage Panels, For an in-depth view of our offerings, please click on the product name or image to discover more.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Established in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is nestled in the picturesque coastal city of Qingdao. We pride ourselves as a pioneering high-tech enterprise, seamlessly integrating industrial and commercial freezing and cold storage solutions with advanced refrigeration systems. Our expertise spans from meticulous research and development to design, manufacturing, and comprehensive sales of state-of-the-art refrigeration equipment.
From the very beginning, we have steadfastly embraced 'science and technology' as our beacon, with 'management' as our steadfast anchor to ensure we not only meet but exceed market demands. Our unwavering commitment to customer service drives us to deliver impeccable refrigeration system solutions, top-grade products, and unparalleled services, setting new benchmarks in customer satisfaction.
With a proud portfolio of over ten national technology patents, we are devoted to the continuous research and development of high-efficiency, energy-saving, and environmentally friendly refrigeration solutions. Our innovative lineup includes high-performance refrigeration units, energy-efficient barrel pumps, and cutting-edge PLC intelligent program control boxes, each crafted to meet the diverse needs of our clientele.
Our expertise encompasses tailor-made program design and equipment customization for a variety of projects. Whether it's food quick-freezing storage, food cold storage, ultra-low temperature facilities, or medicine storage solutions, our proficiency extends to fruit and vegetable air-conditioning storage, workshop air conditioning, quick-freezing and freeze-drying systems, and thawing devices. Each solution is designed for optimal performance and efficiency.
BINGYAN IS DEDICATED TO DELIVERING CUTTING-EDGE, SCIENTIFIC, AND INNOVATIVE REFRIGERATION SYSTEM SOLUTIONS ALONG WITH EXEMPLARY ENGINEERING EXPERTISE AND EXEMPLARY AFTER-SALES SUPPORT.
At Bingyan, we offer a seamless suite of services encompassing sales, precise design, meticulous construction, and attentive after-sales care.
1. Our sales department excels at astutely understanding and capturing customer needs, ensuring crystal-clear conveyance of customer intentions, and fostering ongoing, close-knit communication with our valued clientele.
2. The design department offers clients expert, tailored engineering advice, crafting reliable and resilient refrigeration plans meticulously aligned with each customer's unique requirements.
3. The engineering department approaches every construction phase with dedication and precision, meticulously executing each task with a commitment to excellence to deliver projects of the highest caliber.
4. Our after-sales department remains perpetually prepared, ensuring unwavering support to guarantee customer success at every turn.
Q:What's your advantage?
A: Through our professional designers according to your needs for your professional design, and select the appropriate refrigeration equipment. Ultimately, we achieve the purpose of high cooling efficiency, energy saving and power saving.
Q:How strong is your company?
A:Our company was established in 2011 and has a professional cold storage design team, installation team, and experienced after-sales maintenance personnel. We can provide a complete set of cold storage design, installation guidance, and after-sales maintenance services.
Q:Where are you?Can I visit you?
A: Sure,welcome to you visit our factory at any time.
Q:How about the delivery time?
A: Within 60 days after we confirm you requirement.
Q:what kind of payment does your company support?
A:Usually, a 30% down payment is made through T/T after confirming the Proforma Invoice (PI), and the balance will be paid after inspection and before shipment. We accept telegraphic transfer and sight letter of credit.
Q: When can I get the price?
A: Usually we quote within 24 hours after we get your inquiry.
Q: Which shipping way can you provide?
A: We can provide shipping by sea, by air and by express.
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