NH3/CO2 Cascade Refrigeration System
1. Understanding the NH3/CO2 Cascade Refrigeration System Principle
NH3/CO2 cascade refrigeration systems elegantly bridge two distinct temperature stages. The high-temperature stage operates with NH3 as its refrigerant, while the low-temperature stage employs CO2. The magic happens when NH3's evaporation in the high-temperature stage cools and condenses CO2 gas from the low-temperature stage. A sophisticated condensing evaporator seamlessly connects these stages, serving as both condenser for the low-temperature side and evaporator for the high-temperature side, creating a harmonious refrigeration cycle.
In this ingenious system, heat transfer is a choreographed dance: the CO2 refrigerant absorbs heat via the end evaporator, then transfers it to the high-temperature NH3 refrigerant through the condensing evaporator. The NH3, in turn, releases this heat to the environment via the high-temperature condenser. Once condensed, CO2 enters the reservoir, then flows through a dryer filter and a throttle valve into the CO2 gas-liquid separator. Here, a CO2 circulation pump directs the liquid CO2 to the evaporator. After the evaporator, two-phase CO2 returns to the separator, while gaseous CO2 is compressed by the compressor back into the condensing evaporator. This elegant cycle completes the sophisticated cascade refrigeration process.
NH3/CO2 cascade system divides into high and low-temperature segments, each utilizing a single refrigerant. The high-temperature NH3 system mirrors conventional setups, equipped with a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. Meanwhile, the low-temperature CO2 system includes a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel, showcasing a comprehensive array of components.
The The CO2 gas-liquid separator stands as a pivotal element, efficiently separating CO2 gas droplets post-evaporation in the CO2 compression refrigeration system. This crucial function prevents compressor wet stroke, stabilizes liquid levels during pump operation, and stores pipeline liquid return when the pump halts. With potential reservoir use when inactive, its volume must accommodate all system CO2 liquid. An auxiliary evaporator is strategically placed atop the separator to curb excessive CO2 pressure post-shutdown. In the NH3/CO2 cascade, the condensing evaporator plays dual roles: NH3 side evaporator and CO2 side condenser, with compound liquid evaporation absorbing heat in the tube while CO2 gas condenses into a liquid in the shell.
2. Unveiling the Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Mitigating NH3-associated Risks:
(1.(1)) The NH3/CO2 cascade system significantly lowers NH3 condensing pressure, reducing NH3 refrigerant charge to about 1/10th of traditional ammonia systems, enhancing safety.
(1.(2)) NH3 containment is strictly within machine and equipment rooms, akin to a 'tiger in a cage,' under the vigilant care of skilled professionals.
(1.(3)) Optimal NH3 use in high-temperature zones leverages its excellent heat transfer capabilities to effectively cool CO2.
(2) CO2, as a medium, seamlessly integrates into personnel-dense operation areas like single freezing machines and warehouses, prioritizing the safety of personnel 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. possesses the unique capability to tailor products precisely to your specifications. Unsure of which model best suits your needs? Reach out to us, and we'll guide you in selecting the ideal solution.Our team of seasoned engineers stands ready to craft bespoke solutions, ensuring your requirements are fully met with unparalleled expertise.
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Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is nestled in the serene coastal city of Qingdao. This innovative high-tech enterprise seamlessly integrates industrial and commercial freezing and cold storage solutions, cutting-edge refrigeration systems, and advanced refrigeration equipment. From research and development to design, manufacturing, and sales, our company embodies a comprehensive approach to deliver excellence in every facet of refrigeration technology.
Since our inception, Qingdao Bingyan has been unwaveringly guided by the pillars of 'science and technology', ensuring robust management practices to meet evolving market demands. Our principal objective is to offer unmatched customer service while delivering impeccable refrigeration system solutions, products, and services, all catered to perfection.
Boasting more than ten national technology patents, we are steadfast in our commitment to pioneering research and development. Our focus is crafting high-efficiency, energy-saving, and environmentally friendly refrigeration systems. This includes high-performance refrigeration units, energy-efficient barrel pumps, and sophisticated PLC intelligent program control boxes, setting new benchmarks in refrigeration innovation.
Our expertise primarily extends to the program design and equipment customization for a variety of projects such as food quick-freezing storage, food cold storage, ultra-low temperature cold storage, medicine storage, and fruit and vegetable air-conditioning storage. Moreover, we excel in workshop air conditioning, quick-freezing, freeze-drying, and thawing devices, providing tailored solutions to meet diverse and specialized client needs.
At BINGYAN, we are passionately dedicated to offering our esteemed customers scientifically-backed and thoughtfully-crafted refrigeration system solutions. Our commitment extends beyond to encompass premium-quality engineering and unparalleled after-sales services.
Bingyan offers an all-encompassing array of services that include meticulous sales, innovative design, expert construction, and unwavering after-sales support.
1. Our sales department is adept at precisely understanding and capturing customer aspirations, effectively conveying their intentions, and ensuring seamless, interactive communication to foster strong customer relations.
2. The design department excels in delivering expert engineering advice, crafting customized and resilient refrigeration plans tailored to meet unique customer requirements.
3. In the engineering department, we meticulously approach every construction process with seriousness and strive for unparalleled excellence to deliver outstanding, high-quality projects.
4. Our after-sales department is perpetually prepared, ever-alert, and committed to guaranteeing the absolute 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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