NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously structured into two pivotal stages: the high-temperature stage leveraging NH3 as the refrigerant, and the low-temperature stage employing CO2. In this dynamic system, the NH3 evaporates within the high-temperature tier to adeptly condense the CO2 refrigerant gas from the low-temperature tier. Bridging these two stages is a dual-function condensation evaporator, serving as both the low-temperature condenser and the high-temperature evaporator, seamlessly intertwining the cooling process.
In this system, the heat load is skillfully transferred to the CO2 refrigerant via the end evaporator. The absorbed heat by CO2 is then seamlessly relayed to the high-temperature NH3 refrigerant through the condensing evaporator. Subsequently, the NH3 refrigerant conveys this heat to the high-temperature condenser, ultimately releasing it to the environment with the help of a cooling medium. The condensed CO2 is expertly channeled into the CO2 reservoir, then guided through the dryer filter and throttle valve into the CO2 gas-liquid separator. Without the need for an end cooling apparatus, such as a standalone freezer or chiller, the CO2 circulatory pump directs liquid CO2 to the evaporator. Post-evaporation, the two-phase CO2 returns to the gas-liquid separator, where the gaseous CO2 is compressed by the compressor back into the condensing evaporator, perpetuating the cycle of this efficient cascade refrigeration system.
In the NH3/CO2 cascade refrigeration system, both the high and low temperature levels are distinct systems utilizing individual refrigerants. The equipment is strategically divided: the high-temperature NH3 refrigeration system mirrors a conventional setup, featuring not just the refrigeration compressor but also the condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 system, meanwhile, incorporates a CO2 compressor and a suite of components including a condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
The The CO2 gas-liquid separator serves a crucial role in detaching CO2 gas droplets from the evaporator in the CO2 compression refrigeration system. This mechanism prevents compressor wet stroke, sustains a stable liquid level during pump operation, and stores returning equipment and pipeline liquid when the pump ceases operation. If utilized as a CO2 reservoir while inactive, its volume must accommodate the entirety of the system's CO2 liquid. Additionally, an auxiliary evaporator should be positioned at the gas-liquid separator's top to effectively control CO2 pressure post-shutdown. In the NH3/CO2 cascade system, the condensing evaporator doubles as both NH3's evaporator and CO2's condenser, where compound liquid evaporates within the tube, and CO2 gas is converted to liquid within the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety by Reducing NH3 Hazards:
(1.(1)) The NH3/CO2 cascade system remarkably lowers NH3 condensing pressure, curbing the charge to approximately 1/10 of traditional ammonia systems;
(1.(2)) NH3 is confined within dedicated spaces such as machine rooms, akin to a 'tiger in a cage', under the vigilant oversight of skilled professionals;
(1.(3)) Maximizes the excellent heat transfer properties of NH3 in high-temperature zones to efficiently cool CO2.
(2) CO2 enters personnel-dense operations like single-freezing machines and warehouses, safeguarding 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 |
At Qingdao Bingyan Refrigeration Equipment Co., Ltd., we pride ourselves as a premier manufacturer offering tailored solutions to meet your precise needs. If you're uncertain about which model aligns best with your requirements, don't hesitate to reach out to us with your inquiries.Our team boasts several seasoned professional engineers ready to craft a bespoke solution specially for you, ensuring that our Efficient Cold Storage Industrial Refrigeration Equipment with Variable Frequency perfectly meets your unique specifications.
Shandong Binzhou Huiyang Cold Chain Logistics Port
Spanning an impressive 60,542 square meters, this groundbreaking project boasts a total construction area of 72,370.31 square meters. Within this expansive space, the cold storage area itself majestically encompasses 65,538.50 square meters, seamlessly integrating with the production workshop to create a state-of-the-art facility.
Our company's main products are Condensing units,Air Cooler,Evaporative condenser,Freezer,Cold Room Doors,
Cold storage panels, Explore our full product range by clicking on the product name or image to discover more about each of our offerings
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Since its inception in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. has been thriving in the stunning coastal gem of a city, Qingdao. As a leader in the realm of industrial and commercial freezing solutions, this high-tech enterprise excels in the research, development, design, manufacturing, and sales of top-tier refrigeration systems.
From the very beginning, we have proudly embraced 'science and technology' as our guiding light, with 'management' as the cornerstone to assure market adaptability and outstanding customer service. Our unwavering mission is to deliver impeccable refrigeration system solutions, state-of-the-art products, and unparalleled services to our esteemed clientele.
Boasting over ten prestigious national technology patents, our company is dedicated to the ongoing research and development of high-efficiency, energy-saving, and eco-friendly refrigeration innovations. This includes advanced refrigeration system configurations, high-performance refrigeration units, energy-efficient barrel pumps, and cutting-edge PLC intelligent program control boxes.
Our expertise prominently shines in the program design and bespoke equipment customization for diverse projects. We cater to food quick-freezing storage, food cold storage, ultra-low temperature cold storage, pharmaceutical storage, fruit and vegetable air-conditioning storage, workshop air conditioning, quick-freezing and freeze-drying, and state-of-the-art thawing devices.
BINGYAN IS COMMITTED TO PROVIDING CUSTOMERS WITH SCIENTIFIC AND REASONABLE REFRIGERATION SYSTEM SOLUTIONS, AS WELL AS HIGH-QUALITY ENGINEERING AND AFTER-SALES SERVICES.
Bingyan is dedicated to offering a comprehensive suite of services that include expert sales, innovative design, meticulous construction, and unparalleled after-sales service.
1. Our sales department is adept at precisely understanding and capturing customers' needs. We ensure accurate conveyance of customer intentions and maintain an open line of communication to facilitate a seamless customer interaction experience.
2. The design department excels in providing expert and tailored engineering suggestions that are both professional and reasonable. We craft reliable and stable refrigeration plans customized to meet the unique needs of each customer.
3. Our engineering department approaches each construction process with serious dedication and meticulous attention to detail, striving for excellence in every aspect to bring high-quality projects to fruition.
4. Our after-sales department remains vigilant and ever-ready, committed to ensuring our customers' success and satisfaction at every step.
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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