NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of the Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system ingeniously combines two distinct stages: high-temperature and low-temperature. In this innovative system, NH3 is utilized as the refrigerant in the high-temperature stage, while CO2 takes the spotlight in the low-temperature stage. The brilliance of this design lies in the way it harnesses the evaporation of NH3 in the high-temperature level to effectively condense the CO2 refrigerant gas from the low-temperature level. This is achieved through a sophisticated condensation evaporator, which seamlessly connects the two stages, functioning as both the condenser for the low-temperature level and the evaporator for the high-temperature level.
The thermal load gracefully transfers to the CO2 refrigerant via the end evaporator. Subsequently, the absorbed heat is adeptly conveyed to the high-temperature NH3 refrigerant through the condensing evaporator. The high-temperature NH3 refrigerant then completes the cycle by transferring this heat to the high-temperature condenser, where it is gracefully released into the environment through a cooling medium. Further enhancing the system's efficiency, the condensed CO2 within the condensing evaporator is directed into the CO2 reservoir. From there, it seamlessly moves to the CO2 gas-liquid separator, via the dryer filter and throttle valve. The liquid CO2 is then expertly dispatched to the CO2 evaporator by the CO2 circulation pump, sans any end cooling device, such as a freezer or chiller. Post-evaporation, the two-phase CO2 returns to the gas-liquid separator, and the gaseous CO2 is elegantly drawn by the compressor and compressed back into the condensing evaporator. This cycle, which epitomizes efficiency, is consistently repeated to complete the entire cascade refrigeration cycle.
In the NH3/CO2 cascade refrigeration system, both high and low-temperature levels are characterized by individual refrigerant systems. The equipment composition is meticulously divided into two segments: the high-temperature NH3 refrigeration system mirrors traditional refrigeration setups, encompassing not only the refrigeration compressor but also the condenser, liquid storage, gas-liquid separator, and throttling device. Conversely, the low-temperature CO2 refrigeration system, in harmony with its NH3 counterpart, includes a CO2 compressor along with a condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
The The CO2 gas-liquid separator plays a pivotal role in efficiently dividing CO2 gas droplets from the evaporator within the CO2 compression refrigeration system. This ensures the prevention of wet stroke in the compressor, maintains a steady liquid level during pump operation, and safely stores the liquid return from end equipment and pipelines when the pump is idle. If utilized as a CO2 reservoir during non-operation, its capacity must accommodate all the CO2 liquid within the system. Additionally, to effectively prevent excessive pressure post-shutdown, an auxiliary evaporator should be strategically positioned atop the gas-liquid separator. Within the NH3/CO2 cascade refrigeration system, the condensing evaporator serves dual roles: it is both the NH3 side's evaporator and the CO2 side's condenser, where the compound liquid elegantly evaporates and absorbs heat within the tube, and the CO2 gas masterfully condenses into 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 refrigeration system significantly lowers the condensing pressure of the NH3 refrigerant charge, achieving approximately 1/10th of the traditional ammonia refrigeration system's charge.
(1.(2)) By confining NH3 to the machine room and equipment room, it becomes akin to a 'tiger in a cage,' diligently monitored by skilled professionals.
(1.(3)) Fully optimizes NH3's excellent heat transfer properties in the high-temperature region, efficiently utilized to cool CO2.
(2) CO2 Integration for Personnel Safety: CO2, as a medium, is introduced into areas with high personnel density, such as operational rooms or warehouses, ensuring the utmost safety for both personnel and property.
9dc970e0
| 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 leading manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. offers the flexibility to tailor our products precisely to your specifications, ensuring they meet your unique needs. If you're uncertain about which model best suits your requirements, we invite you to reach out to us directly. Our dedicated team is ready to assist you in making the ideal choice..Our expert team of professional engineers will craft a bespoke solution tailored specifically for you, ensuring unparalleled performance and satisfaction.
Shandong Binzhou Huiyang Cold Chain Logistics Port
The extensive project spans an impressive area of 60,542 square meters, with a total construction area reaching 72,370.31 square meters. It magnificently comprises a state-of-the-art production workshop and a vast cold storage space covering 65,538.50 square meters, designed to seamlessly support and enhance logistics operations.
Our company's main products are crafted with precision and designed to meet the highest standards, including: Condensing Units,Air Coolers,Evaporative Condensers,Freezers,Cold Room Doors,
Cold Storage Panels, For a comprehensive understanding and to explore more of our exceptional products, please click on the product name or product picture.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Established in 2011, nestled in the picturesque coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. stands as an epitome of innovation and excellence. This high-tech enterprise seamlessly integrates industrial and commercial freezing and cold storage solutions, as well as cutting-edge refrigeration systems and equipment, all under one roof, from research and development to manufacturing and sales.
From its very inception, the company has passionately embraced 'science and technology' as its beacon, with 'management' as its cornerstone. Driven by the mission to satisfy market demands and exceed customer service expectations, Qingdao Bingyan is dedicated to providing impeccable refrigeration system solutions, products, and services.
The company prides itself on holding over ten national technology patents, reflecting a steadfast commitment to the research and development of high-efficiency, energy-saving, and environmentally friendly refrigeration system configurations. Our offerings include state-of-the-art refrigeration units, energy-efficient barrel pumps, and advanced PLC intelligent program control boxes, among others.
Our expertise primarily lies in designing programs and customizing equipment for a wide array of projects. These include food quick-freezing storage, food cold storage, ultra-low temperature cold storage, medicine storage, fruit and vegetable air-conditioning storage, workshop air conditioning, as well as quick-freezing and freeze-drying, and thawing devices.
At BINGYAN, we are devoted to delivering scientific and tailored refrigeration system solutions that meet the highest standards. Coupled with our commitment to unparalleled engineering and comprehensive after-sales services, we ensure that our customers receive only the best.
Bingyan extends an all-encompassing suite of services that include precise sales, innovative design, expert construction, and dedicated after-sales support, ensuring a seamless experience from start to finish.
1. Our sales department excels at thoroughly understanding and interpreting customer needs, ensuring that every intention is clearly communicated. We pride ourselves on maintaining seamless and efficient communication with our valued clients.
2. The design department offers expert and bespoke engineering advice, crafting refrigeration plans that are both reliable and tailored to the unique needs of each customer, ensuring stability and efficiency.
3. Our engineering department is committed to excellence, approaching every construction process with precision and attention to detail. We meticulously complete each task to produce high-quality projects that stand out.
4. The after-sales department remains vigilant and ready to support, ensuring that our customers' success is always a priority, providing prompt assistance whenever needed.
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.
Audited Supplier 
){kind=link}