NH3/CO2 Cascade Refrigeration System
1. The Principle of NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system ingeniously combines two distinct stages: a high-temperature stage employing NH3 as the refrigerant, and a low-temperature stage utilizing CO2. This dual-stage system operates with NH3 evaporation in the high-temperature stage to condense the discharged CO2 gas from the low-temperature stage. A pivotal component, the condensation evaporator, serves as the bridge between these stages, acting concurrently as the low-temperature condenser and the high-temperature evaporator.
In this sophisticated system, the heat load is first transferred to the CO2 refrigerant through the end evaporator. The absorbed heat is then seamlessly passed to the high-temperature NH3 refrigerant via the condensing evaporator. From there, the NH3 refrigerant dispatches the heat to a high-temperature condenser, whereupon it's released into the environment with the help of a cooling medium. The CO2, once condensed in the evaporator, is directed into the CO2 reservoir, ushered through a dryer filter and throttle valve into the CO2 gas-liquid separator. A CO2 circulation pump propels the liquid CO2 to the evaporator, sans any end cooling device like a single freezer or chiller. Following its journey through the evaporator, two-phase CO2 returns to the gas-liquid separator. The gaseous CO2 is then drawn by the compressor, compressed, and reintroduced into the condensing evaporator, continuing this elegant refrigeration cycle.
In the NH3/CO2 cascade refrigeration system, each stage functions as a standalone system using a single refrigerant. The system's architecture is bifurcated: the high-temperature NH3 refrigeration system mirrors conventional setups, comprising a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and a throttling device. Conversely, the low-temperature CO2 system features a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
The In the CO2 compression refrigeration system, the CO2 gas-liquid separator plays a crucial role, effectively segregating CO2 gas droplets from the evaporator, mitigating the risk of compressor wet stroke, and ensuring a steady liquid level during pump operation. It also accommodates returning liquid from end equipment and pipelines when the pump ceases operation. If employed as a CO2 reservoir during downtime, its capacity should suffice to store all system CO2 liquid. An auxiliary evaporator atop the separator is advisable to thwart excessive CO2 pressure post-shutdown. The condensing evaporator in an NH3/CO2 cascade system functions dually: as an NH3-side evaporator and a CO2-side condenser, facilitating compound liquid evaporation and heat absorption within the tube while CO2 condenses into a liquid in the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety with Reduced NH3 Factors:
(1.(1)) The NH3/CO2 cascade system significantly minimizes NH3's condensing pressure, reducing it to roughly one-tenth of traditional ammonia systems;
(1.(2)) NH3 is confined to the machine and equipment rooms, akin to a 'tiger in a cage,' diligently monitored by skilled personnel;
(1.(3)) This system capitalizes on NH3's commendable high-temperature heat transfer properties to effectively cool CO2.
(2) CO2 Utilization in Personnel-Dense Environments: CO2, a safer alternative, is used in areas with high personnel presence, like operation rooms or warehouses, ensuring the utmost safety for both individuals and assets.
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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 leading manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. offers tailor-made solutions crafted specifically for your needs. Unsure of the perfect model for your requirements? Simply reach out to us, and we will guide you with precision and expertise.Our team boasts a cadre of expert engineers ready to devise a bespoke solution that aligns perfectly with your unique demands.
Shandong Binzhou Huiyang Cold Chain Logistics Port
This expansive project spans an impressive area of 60,542 square meters, with a remarkable total construction area of 72,370.31 square meters. It features state-of-the-art production workshops and a vast cold storage area covering 65,538.50 square meters, all designed to meet the highest standards of efficiency and quality.
Our company's main products are: Condensing units - expertly crafted to ensure efficient and reliable performance in various settings,Air Cooler - designed to deliver superior cooling power and optimum energy efficiency,Evaporative condenser - offering state-of-the-art technology for enhanced heat exchange capabilities,Freezer - engineered for precision and durability, ideal for preserving your goods at perfect temperatures,Cold Room Doors - robust and secure, ensuring maximum insulation and energy savings,
Cold storage panels - crafted with top-quality materials to maintain optimal temperature control, If you want to discover more about our exceptional product range, please click on the product name or product picture
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is located in the enchanting coastal city of Qingdao. We are a pioneering high-tech enterprise that seamlessly integrates industrial and commercial freezing, cold storage, and advanced refrigeration systems. Our expertise covers research and development, innovative design, manufacturing, and sales of cutting-edge refrigeration equipment.
Since our inception, we have steadfastly embraced 'science and technology' as our guiding star, with 'management' as our cornerstone to fulfill market demands and deliver exceptional customer service. Our mission is to offer impeccable refrigeration system solutions and top-tier products and services.
With over ten national technology patents under our belt, we are dedicated to the continuous research and development of highly efficient, energy-saving, and environmentally-friendly refrigeration systems. Our portfolio includes state-of-the-art high-efficiency refrigeration units, energy-saving barrel pumps, and sophisticated PLC intelligent program control boxes.
We specialize in program design and bespoke equipment customization for a diverse array of projects. Our expertise encompasses 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, freeze-drying, and thawing devices.
At BINGYAN, we pride ourselves on delivering meticulously crafted, scientifically advanced, and well-engineered refrigeration system solutions. We promise to provide not only high-quality products but also exceptional engineering expertise and outstanding after-sales support.
Bingyan offers an all-encompassing suite of services, expertly covering every aspect from initial sales and innovative design to precise construction and dedicated after-sales service.
1. Our sales department excels at keenly understanding and accurately interpreting customer needs. We ensure clear communication by consistently conveying customer intentions and maintaining active engagement with our valued clientele.
2. Our design department is dedicated to offering professional and insightful engineering recommendations. We meticulously craft custom-tailored, reliable, and stable refrigeration plans to perfectly suit the specific needs of our customers.
3. The engineering department approaches each construction process with meticulous attention to detail, executing every task with precision. Our commitment to excellence ensures the delivery of high-quality, superior projects.
4. Our after-sales department is perpetually at the ready, prepared to provide unwavering support and guarantee the success and satisfaction of our customers.
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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