NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously designed with two distinct stages: high temperature and low temperature. The high temperature stage employs NH3 as the refrigerant, while the low temperature stage utilizes CO2. In a remarkable process, the evaporation of NH3 in the high temperature system condenses the CO2 gas discharged from the low temperature system. These two stages are seamlessly interconnected by a condensation evaporator, which acts as both the condenser for the low temperature stage and the evaporator for the high temperature stage, ensuring efficient thermal exchange.
Through the end evaporator, heat is efficiently transferred to the CO2 refrigerant, which subsequently passes the absorbed heat to the high-temperature NH3 refrigerant via the condensing evaporator. This high-temperature NH3 refrigerant then channels the heat to the high-temperature condenser, releasing it into the environment using a cooling medium. The CO2, now condensed in the evaporator, is stored in the CO2 reservoir before making its journey through the dryer filter and throttle valve to the CO2 gas-liquid separator. The liquid CO2 is propelled by the CO2 circulation pump to the CO2 evaporator, bypassing any terminal cooling devices like single freezers or chillers. Post-evaporation, the two-phase CO2 makes its return to the gas-liquid separator, where gaseous CO2 is drawn in by the compressor, compressed, and sent back into the condensing evaporator, perpetuating this efficient cascade refrigeration cycle.
In the NH3/CO2 cascade refrigeration system, each stage operates as a standalone refrigeration system using a distinct refrigerant. The high-temperature NH3 system mirrors conventional systems, equipped with a compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 system includes a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel, ensuring comprehensive and efficient operation.
The The CO2 gas-liquid separator plays a pivotal role in the CO2 compression refrigeration system by efficiently separating CO2 gas droplets from the evaporator, thus protecting the compressor from wet strokes, maintaining a steady liquid level during pump operation, and storing pipeline liquid return when the pump is stationary. Functioning as a CO2 reservoir during inactivity, it’s designed to accommodate all system CO2 liquid. An auxiliary evaporator atop the gas-liquid separator mitigates excessive CO2 pressure post-shutdown. Within the NH3/CO2 cascade system, the condensing evaporator serves dual roles: as the NH3 side evaporator and CO2 side condenser. It facilitates compound liquid evaporation and heat absorption within the tube, while concurrently condensing CO2 gas into liquid in the shell, showcasing the system's versatile thermal management.
2. Benefits of the NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety with Reduced NH3 Concerns:
(1.(1)) The NH3/CO2 cascade system significantly lowers the condensing pressure of NH3 refrigerant, reducing it to about one-tenth of traditional ammonia systems, thereby enhancing safety and reliability.
(1.(2)) NH3 is confined to controlled environments like the machine room and equipment room, akin to a 'tiger in a cage,' diligently monitored by skilled technicians.
(1.(3)) This system fully leverages NH3's excellent heat transfer properties in the high-temperature zone, optimizing it for CO2 cooling.
(2) CO2 Integration in High-Traffic Areas: CO2, as a medium, is safely introduced into operational areas with high personnel activity, like single-freezing machines and warehouses, ensuring utmost safety for both 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 premier manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. offers bespoke product customization tailored specifically to your unique requirements. Unsure of the ideal model for your needs? Simply reach out to us with your inquiry and let our expertise guide you to the perfect solution.Our team comprises several highly skilled and professional engineers dedicated to crafting personalized, cutting-edge solutions just for you. Experience the pinnacle of customized engineering excellence with our unrivaled support.
Shandong Binzhou Huiyang Cold Chain Logistics Port
This expansive project boasts a sprawling coverage of 60,542 square meters and features a substantial total construction area of 72,370.31 square meters. Seamlessly integrating state-of-the-art production workshops, it also includes an impressive cold storage space measuring 65,538.50 square meters, designed to meet diverse cold storage and processing needs.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. proudly presents our core product offerings, meticulously crafted to meet your refrigeration and cold storage requirements: 1. Condensing Units - Engineered for superb efficiency and performance.,2. Air Coolers - Designed to deliver optimal cooling and reliability.,3. Evaporative Condensers - Combining innovation with sustainability for superior heat exchange.,4. Freezers - Ensuring your goods remain perfectly preserved.,5. Cold Room Doors - Built with precision for enhanced insulation and security.,
6. Cold Storage Panels - Constructed for maximum durability and insulation efficiency., For a deeper insight into our diverse product range, kindly click on the product name or image to explore further.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in the picturesque coastal city of Qingdao in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. stands as a beacon of innovation in the realm of industrial and commercial refrigeration. We seamlessly integrate freezing and cold storage solutions with cutting-edge research, development, design, manufacturing, and sales, positioning ourselves as a foremost high-tech enterprise in the industry.
From the very beginning, our company has passionately embraced 'science and technology' as our guiding light. Paired with robust 'management', we strive to anticipate and fulfill market demands, delivering unmatched customer service. Our ultimate ambition is to provide flawless refrigeration system solutions, crafted to perfection, alongside unparalleled products and services.
Boasting over ten national technology patents, our company is relentless in its pursuit of excellence. We are dedicated to the research and development of high-efficiency, energy-saving, and environmentally friendly refrigeration systems. Our expertise spans the creation of high-performance refrigeration units, energy-conserving barrel pumps, and sophisticated PLC intelligent program control boxes, among others.
Our primary focus is the meticulous design and customization of equipment for a wide array of projects. These include food quick-freezing storage, food cold storage, ultra-low temperature cold storage, and medicine storage. Additionally, we cater to fruit and vegetable air-conditioning storage, workshop air conditioning, quick-freezing and freeze-drying processes, as well as thawing devices, ensuring comprehensive solutions for our clients.
BINGYAN IS DEDICATED TO DELIVERING CUTTING-EDGE REFRIGERATION SYSTEM SOLUTIONS, ALONG WITH EXEMPLARY ENGINEERING AND UNMATCHED AFTER-SALES SERVICES.
Bingyan offers a full spectrum of services, encompassing sales, design, construction, and unparalleled after-sales support.
1. Our sales department expertly identifies and fully comprehends customer requirements, ensuring that every client intention is conveyed with precision, while maintaining seamless and proactive communication.
2. The design department crafts bespoke and innovative engineering recommendations, skillfully developing robust and dependable refrigeration plans tailored to the unique specifications of each customer.
3. In the engineering department, we approach every phase of construction with diligence and meticulous attention to detail, striving for perfection to deliver exceptional, high-caliber projects.
4. The after-sales department remains ever-vigilant and prepared at all times, providing steadfast support to guarantee our customers' ongoing success.
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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