NH3/CO2 Cascade Refrigeration System
1. The Principle of NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system ingeniously integrates two distinct cooling stages: a high temperature stage and a low temperature stage. In this sophisticated setup, NH3 serves as the refrigerant at the high temperature level, while CO2 takes the role at the low temperature level. The process unfolds as NH3 evaporates within the high temperature system, skillfully condensing the CO2 refrigerant gas from the low temperature system. The magic happens at the condensation evaporator, a pivotal component bridging the two systems. This dual-purpose device functions as the condenser for the low temperature level and the evaporator for the high temperature level, seamlessly facilitating the refrigeration process.
Within this advanced system, the heat load is adeptly transferred to the CO2 refrigerant via the end evaporator. The absorbed heat is then channeled to the high-temperature NH3 refrigerant through the condensing evaporator. With finesse, the high-temperature NH3 refrigerant transfers the heat to the high-temperature condenser, eventually releasing it to the environment through a cooling medium. As a result, condensed CO2 from the condensing evaporator flows into the CO2 reservoir before entering the CO2 gas-liquid separator through a dryer filter and throttle valve. The liquid CO2 is pumped to the CO2 evaporator, commencing its journey through the system. Post-evaporation, the two-phase CO2 returns to the gas-liquid separator, where the gaseous CO2 is drawn by the compressor and compressed once again into the condensing evaporator. This ingenious cycle perpetuates the cascade refrigeration process.
In the NH3/CO2 cascade refrigeration system, each temperature level functions as a standalone refrigeration system using a single refrigerant. The system's structure is divided into two comprehensive segments: the high-temperature NH3 refrigeration system mirrors the conventional setup, equipped with a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. Meanwhile, the low temperature CO2 refrigeration system includes a CO2 compressor alongside a condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel. Together, these components create a seamless and efficient cooling operation.
The The CO2 gas-liquid separator plays a crucial role in the CO2 compression refrigeration system by efficiently separating CO2 gas droplets from the evaporator, preventing wet strokes in the compressor, and maintaining a stable liquid level during pump operation. When the pump halts, it adeptly stores equipment and pipeline liquid return. If utilized as a CO2 reservoir when inactive, its volume is designed to accommodate the entire system's CO2 liquid. Additionally, an auxiliary evaporator atop the gas-liquid separator ensures that CO2 pressure remains optimal post-shutdown. In the NH3/CO2 cascade refrigeration system, the condensing evaporator serves as a dual-function marvel—acting both as the NH3 side evaporator and the CO2 side condenser, where compound liquid evaporates and absorbs heat inside the tube, while carbon dioxide gas is efficiently condensed into liquid within the shell.
2. Advantages of NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety by Reducing NH3 Factors:
(1.(1)) The NH3/CO2 cascade refrigeration system dramatically minimizes the condensing pressure of the NH3 refrigerant, using merely about 1/10 of the charge required by traditional ammonia refrigeration systems.
(1.(2)) NH3 is safely confined to the machine room or equipment room, akin to a 'tiger' securely enclosed within a 'cage', with vigilant oversight by skilled professionals.
(1.(3)) This system maximizes the excellent heat transfer properties of NH3, particularly in the high-temperature region, for effectively cooling CO2.
(2) CO2, as a refrigerant medium, is strategically introduced into personnel-intensive operation rooms, such as single-freezing machines and warehouse spaces, ensuring the utmost 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 |
As a pioneering manufacturer in the industry, Qingdao Bingyan Refrigeration Equipment Co., Ltd. proudly offers bespoke solutions tailored precisely to your needs. Unsure about the right model for your operations? Don't hesitate to reach out to us with your requirements.Our team boasts several highly skilled engineers dedicated to crafting the perfect customized solution just for you, ensuring optimal performance and satisfaction.
Shandong Binzhou Huiyang Cold Chain Logistics Port
The project is an expansive development, sprawling across an impressive 60,542 square meters. This stunning facility boasts a total construction area of 72,370.31 square meters, which includes a sophisticated production workshop and an extensive cold storage space covering 65,538.50 square meters.
At Qingdao Bingyan Refrigeration Equipment Co., Ltd., we proudly specialize in offering a comprehensive selection of premium products, including: High-Performance Condensing Units,Efficient Air Coolers,Advanced Evaporative Condensers,State-of-the-Art Freezers,Durable Cold Room Doors,
Innovative Cold Storage Panels, To explore more about our cutting-edge products, simply click on the product name or image.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Established in 2011, this innovative company is nestled in the picturesque coastal city of Qingdao. Qingdao Bingyan Refrigeration Equipment Co., Ltd. is a distinguished high-tech enterprise that masterfully integrates industrial and commercial freezing, cold storage, refrigeration system R&D, design, manufacturing, and sales into a seamless operation.
From its inception, the company has steadfastly embraced 'science and technology' as a beacon of innovation and 'management' as the cornerstone of excellence, all to address market demand and deliver impeccable customer service. The company steadfastly aims to provide clients with flawless refrigeration system solutions, exceptional products, and unparalleled services.
Qingdao Bingyan is proud to hold over ten national technology patents, continuously dedicating itself to the research and development of cutting-edge, energy-efficient, and environmentally friendly refrigeration systems. Our repertoire includes advanced high-efficiency refrigeration units, energy-saving barrel pumps, and state-of-the-art PLC intelligent program control boxes, among others.
Our expertise shines in the program design and equipment customization for a diverse array of projects, including food quick-freezing storage, food cold storage, ultra-low temperature cold storage, medicine storage, and fruit and vegetable air-conditioning storage. We also specialize in workshop air conditioning, quick-freezing and freeze-drying systems, and sophisticated thawing devices.
BINGYAN IS DEDICATED TO DELIVERING ITS CLIENTS CUTTING-EDGE, SCIENTIFICALLY SOUND REFRIGERATION SYSTEM SOLUTIONS, ALONG WITH EXEMPLARY ENGINEERING AND AFTER-SALES SERVICES OF THE HIGHEST QUALITY.
Bingyan offers an all-inclusive suite of services encompassing sales, design, meticulous construction, and unparalleled after-sales support.
1. Our sales department excels in precisely understanding and capturing customer requirements, ensuring clear and effective communication of customer objectives while maintaining a dynamic and continuous dialogue with them.
2. In our design department, we furnish clients with expert and practical engineering insights, devising robust and dependable refrigeration plans meticulously tailored to meet their distinct needs.
3. The engineering department is committed to excellence, executing each construction process with care and precision, diligently completing every task to deliver outstanding, high-quality projects.
4. Our after-sales department remains poised and ready at all times, providing unwavering support to guarantee our clients' success.
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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