NH3/CO2 Cascade Refrigeration System: An Advanced Cooling Solution
1. NH3/CO2: The Underlying Principle of Cascade Refrigeration
The NH3/CO2 cascade refrigeration system ingeniously integrates a high and low temperature stage. At the high-temperature stage, ammonia (NH3) serves as the refrigerant, while the low-temperature stage employs carbon dioxide (CO2). The NH3 refrigerant in the high-temperature system evaporates, effectively condensing the CO2 gas from the low-temperature stage. A condensation evaporator ingeniously connects these two realms, functioning as the condenser for the low-temperature stage and the evaporator for the high-temperature stage, ensuring seamless operation.
The cooling process is a marvel of efficiency: heat load travels to the CO2 refrigerant via the end evaporator, transferring its absorbed heat to the high-temperature NH3 refrigerant through the condensing evaporator. This NH3 refrigerant then offloads the heat to a high-temperature condenser, releasing it into the environment via a cooling medium. Once condensed in the evaporator, CO2 enters a reservoir, transitioning through a dryer filter and throttle valve to a gas-liquid separator. The CO2 circulation pump propels the liquid CO2 to an evaporator. Post-evaporation, two-phase CO2 cycles back to the separator, where gaseous CO2 is compressed and sent to the condensing evaporator, perpetuating the cascade refrigeration cycle.
NH3/CO2 systems distinctly separate high and low temperatures, each using a unique refrigerant. The high-temperature NH3 system mirrors conventional systems, featuring a compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 system comprises a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel, together creating an efficient dual-cooling setup.
The CO2 gas-liquid separators are pivotal in isolating CO2 gas droplets from the evaporator in CO2 compression refrigeration systems. This prevents compressor wet strokes, stabilizes liquid levels during pump operation, and stores returning liquid when pumps halt. As a reservoir, it must accommodate the entire CO2 liquid system volume. Additionally, an auxiliary evaporator on top protects against excessive CO2 pressure post-shutdown. In NH3/CO2 systems, the dual-function condensing evaporator acts as an NH3-side evaporator and a CO2-side condenser, where compound liquid absorbs heat and CO2 gas converts to liquid.
2. Key Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety by Reducing NH3 Hazards:
(1.(1)) The NH3/CO2 system remarkably diminishes NH3 condensing pressure to nearly 1/10 of traditional ammonia systems.
(1.(2)) NH3 is securely confined to machine and equipment rooms, akin to a 'tiger in a cage,' under the vigilant watch of experts.
(1.(3)) It maximizes NH3's superior heat transfer properties in high-temperature regions, efficiently cooling CO2.
(2) The use of CO2 in populous operational settings, like single-freezing units and warehouses, ensures personnel and property safety.
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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, we pride ourselves on our ability to tailor our offerings to precisely meet your unique needs. Unsure of which model suits your requirements best? Simply reach out to us, and we will guide you!Our team boasts several expert engineers who are dedicated to crafting a personalized solution just for you, ensuring maximum performance and satisfaction.
Shandong Binzhou Huiyang Cold Chain Logistics Port
This ambitious project spans an impressive 60,542 square meters, with a total construction area of 72,370.31 square meters. It features an advanced production workshop and a cutting-edge cold storage area, which alone occupies 65,538.50 square meters.
At Qingdao Bingyan Refrigeration Equipment Co., Ltd., our flagship products include: State-of-the-art Condensing Units,Innovative Air Coolers,High-efficiency Evaporative Condensers,Durable Freezers,Robust Cold Room Doors,
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Qingdao Bingyan Refrigeration Equipment Co., Ltd. Established in the vibrant coastal metropolis of Qingdao in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. stands as a beacon of innovation in the industrial and commercial refrigeration sector. We seamlessly integrate cutting-edge research, development, and design in refrigeration systems with the manufacturing prowess and sales acumen of a high-tech enterprise.
From its very inception, our company has steadfastly embraced 'science and technology' as its guiding force, with 'management' as a robust backbone. Our unwavering mission is to fulfill market needs and exceed customer expectations by delivering impeccable refrigeration system solutions and unmatched services.
With a treasure trove of over ten national technology patents, we are committed to advancing high-efficiency, energy-saving, and environmentally conscious refrigeration systems. Our portfolio boasts highly efficient refrigeration units, energy-saving barrel pumps, and cutting-edge PLC intelligent program control boxes, each crafted with precision and innovation.
Our expertise lies in the bespoke design and customization of refrigeration solutions for a diverse array of projects. From food quick-freezing and cold storage to ultra-low temperature and medicinal storage, we excel in creating the ideal environments for preserving quality. We also specialize in air-conditioning for workshops, quick-freezing, freeze-drying, and advanced thawing devices.
At BINGYAN, our unwavering commitment is to offer our esteemed customers scientific and intelligently designed refrigeration system solutions. Our promise extends to delivering high-quality engineering services and exceptional after-sales support.
Bingyan takes pride in offering a full spectrum of services encompassing sales, meticulous design, expert construction, and dedicated after-sales support, ensuring a seamless and satisfying customer journey.
1. Our sales department excels in understanding and pinpointing the precise needs of our customers. With exceptional communication skills, we ensure that your intentions are conveyed with utmost accuracy and maintain transparent, ongoing dialogue for unparalleled service.
2. Our design department is equipped with professionals who deliver expert engineering advice. We craft reliable and stable refrigeration plans meticulously tailored to meet the unique needs of each customer, ensuring optimal performance and satisfaction.
3. Our engineering team approaches every construction process with meticulous attention to detail, consistently striving for excellence at every step to deliver high-quality projects that stand the test of time.
4. Our dedicated after-sales department remains on constant standby, ready to provide unwavering support and ensure your ongoing success, demonstrating our commitment to customer satisfaction.
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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