NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously crafted with a dual-stage design: a high-temperature stage employing NH3 as the refrigerant, and a low-temperature stage utilizing CO2. In this marvel of engineering, the NH3 refrigerant evaporates at the high-temperature level to condense the CO2 refrigerant gas expelled from the low-temperature level. A condensation evaporator gracefully bridges these two temperature levels, serving simultaneously as the low-temperature condenser and the high-temperature evaporator.
In an exquisite transfer of thermal energy, the heat load is carried to the CO2 refrigerant through the terminal evaporator. This heat is then transferred to the high-temperature NH3 refrigerant via the condensing evaporator. The high-temperature NH3 refrigerant seamlessly diverts this heat to the high-temperature condenser, releasing it to the environment using a cooling medium. The condensed CO2 within the condensing evaporator flows into a CO2 reservoir and proceeds to the CO2 gas-liquid separator via a dryer filter and throttle valve. Liquid CO2 is elegantly propelled to the CO2 evaporator by the CO2 circulation pump. Post-evaporation, two-phase CO2 returns to the gas-liquid separator, while gaseous CO2 is drawn by the compressor and recompressed into the condensing evaporator. This cycle perpetuates the cascade refrigeration process flawlessly.
In the NH3/CO2 cascade refrigeration system, each temperature level operates as a single refrigerant system. The high-temperature NH3 refrigeration system comprises a conventional setup including a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 system is equipped with a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel, working in harmony to ensure optimal refrigeration.
The The CO2 gas-liquid separator plays a pivotal role by delicately separating CO2 gas droplets from the evaporator in the CO2 compression refrigeration system. This prevention of compressor wet stroke ensures a stable liquid level during pump operation, while preserving the liquid return of end equipment and pipelines when the pump ceases operation. Should the gas-liquid separator function as a reservoir during downtime, it must accommodate all CO2 liquid within the system. Moreover, an auxiliary evaporator atop the gas-liquid separator effectively curtails CO2 pressure surges post-shutdown. Within the NH3/CO2 cascade refrigeration system, the condensing evaporator ingeniously acts as the NH3 side evaporator and the CO2 side condenser. It facilitates the evaporation and heat absorption of the compound liquid within the tube, while CO2 gas transitions into liquid form in the shell.
2. Advantages of NH3/CO2 Cascade Refrigeration System
(1) Reduced NH3 Safety Risks:
(1.(1)) The NH3/CO2 cascade refrigeration system significantly minimizes the condensing pressure of the NH3 refrigerant charge to approximately 1/10 of a traditional ammonia system, enhancing safety;
(1.(2)) NH3 is confined to the machine room and equipment room, akin to a 'tiger' safeguarded within a 'cage,' under the vigilant oversight of professionals;
(1.(3)) The system maximizes NH3's exceptional heat transfer capabilities in high-temperature regions to cool CO2.
(2) CO2, as a refrigerant, enters personnel-intensive operational areas (like single-freezing machines) and warehouses, ensuring the safety and security of 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 |
As a dedicated manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. excels in crafting tailored products to meet your specific needs. If you're uncertain about which model will best serve your purposes, feel free to reach out to us.Our team of highly skilled engineers is ready to create a bespoke solution just for you, ensuring optimal performance and satisfaction.
Shandong Binzhou Huiyang Cold Chain Logistics Port
The ambitious project spans a vast area of 60,542 square meters, with an impressive total construction footprint of 72,370.31 square meters. This includes a state-of-the-art production workshop and a dedicated cold storage area that boasts 65,538.50 square meters of cutting-edge, temperature-controlled space.
Our company's main products are: Condensing units,Air Coolers,Evaporative Condensers,Freezers,Cold Room Doors,
Cold Storage Panels, To explore more about our products, please click on either the product name or its image to dive into details.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is nestled in the picturesque coastal city of Qingdao. As a high-tech enterprise, we excel in integrating industrial and commercial freezing and cold storage solutions, advanced refrigeration systems, and cutting-edge refrigeration equipment. Our expertise spans research and development, meticulous design, state-of-the-art manufacturing, and robust sales.
From the very beginning, our company has embraced 'science and technology' as our guiding star, with 'management' as our steadfast guarantor. Our mission is to fulfill market demands and deliver unparalleled customer service. We are dedicated to providing our clients with flawless refrigeration system solutions, superior products, and exemplary services.
Our company proudly holds over ten national technology patents, showcasing our unwavering commitment to innovation. We are dedicated to the research and development of high-efficiency, energy-saving, and environmentally friendly refrigeration system configurations. Our product lineup includes high-performance refrigeration units, energy-efficient barrel pumps, and sophisticated PLC intelligent program control boxes, among others.
We specialize in tailoring program design and equipment customization for diverse projects. Our expertise encompasses food quick-freezing storage, food cold storage, ultra-low temperature cold storage, medicine storage, fruit and vegetable air-conditioning storage, workshop air conditioning, quick-freezing and freeze-drying solutions, and thawing devices.
BINGYAN IS COMMITTED TO DELIVERING CUTTING-EDGE, SCIENTIFICALLY-ENGINEERED REFRIGERATION SYSTEM SOLUTIONS, ALONG WITH UNPARALLELED HIGH-QUALITY ENGINEERING AND DEDICATED AFTER-SALES SERVICES.
Bingyan offers a full spectrum of services, including sales, design, construction, and after-sales support, ensuring a seamless experience for our valued customers.
1. Our sales department thoroughly understands and anticipates customer needs, ensuring precise communication of customer intentions while maintaining robust, ongoing dialogue with clients.
2. The design department crafts professional and insightful engineering recommendations, customizing reliable and stable refrigeration plans tailored meticulously to the unique needs of each customer.
3. Our engineering department approaches every construction process with utmost care and precision, meticulously completing each task to achieve excellence and deliver superior quality projects.
4. The after-sales department remains perpetually on standby, fully prepared to ensure the continued success and satisfaction of our esteemed 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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