NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of the Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is an innovative two-stage process comprising high and low temperature phases. In the high temperature phase, ammonia (NH3) serves as the refrigerant, while the low temperature phase utilizes carbon dioxide (CO2). The brilliance of this system lies in the evaporation of NH3 at the high temperature phase, which efficiently condenses the refrigerant CO2 from the low temperature phase. A condensation evaporator ingeniously connects these phases, functioning dually as the low temperature condenser and the high temperature evaporator.
Heat transfer within the system is methodical and efficient. Initially, the heat load is conveyed to the CO2 refrigerant via the end evaporator. Subsequently, this absorbed heat is transferred to the high-temperature NH3 refrigerant through the condensing evaporator. The high-temperature NH3 refrigerant then dissipates this heat to the environment through the high-temperature condenser using a cooling medium. Post-condensation in the evaporator, the CO2 migrates to a reservoir, processed further through a dryer filter and throttle valve, before being propelled by the CO2 circulation pump to the evaporator. Here, the two-phase CO2 returns to the gas-liquid separator, and gaseous CO2 is compressed into the condensing evaporator by the compressor, perpetuating the entire cascade cycle seamlessly.
In the NH3/CO2 cascade refrigeration system, single refrigerant systems define both the high and low temperature phases. Equipment is meticulously divided: the high-temperature NH3 system, akin to conventional systems, encompasses the refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. Conversely, the low-temperature CO2 system, beyond the CO2 compressor, integrates the condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
The The CO2 gas-liquid separator plays a crucial role, efficiently segregating CO2 gas droplets from the evaporator in the CO2 compression system. This prevents compressor wet strokes and ensures stable liquid levels during pump operations, safeguarding equipment and pipelines upon pump halts. When inactive, the separator can store all system CO2 as a reservoir. Its design includes an auxiliary evaporator to prevent excessive CO2 pressure post-shutdown. The condensing evaporator, in our NH3/CO2 system, is multifunctional, acting as both the NH3 side evaporator and CO2 side condenser, where the compound liquid evaporates, absorbing heat within, while CO2 condenses into liquid.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Reduced NH3 Unsafe Factors:
(1.(1)) The NH3/CO2 cascade refrigeration system significantly diminishes NH3’s condensing pressure, requiring only about a tenth of traditional ammonia charges.
(1.(2)) NH3 containment is exclusive to the machine room, akin to a 'tiger in a cage,' vigilantly monitored by skilled technicians.
(1.(3)) Full utilization of NH3 in high-temperature regions maximizes its excellent heat transfer properties to effectively cool CO2.
(2) CO2’s role as a medium allows safe integration into high-traffic operation rooms and warehouses, ensuring maximum safety for 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. offers bespoke product customization tailored precisely to your requirements. Unsure which model best suits your needs? Simply reach out to us, and our team will assist you in finding the perfect fit.Our team comprises several expert engineers committed to crafting a personalized solution just for you. With their expertise, you can rest assured that your needs for Variable Frequency Refrigeration Equipment for Efficient Cold Storage Solutions will be met with precision and excellence.
Introducing the Shandong Binzhou Huiyang Cold Chain Logistics Port
This state-of-the-art project spans an impressive 60,542 square meters and boasts a total construction area of 72,370.31 square meters. It features a dedicated production workshop and a vast cold storage area of 65,538.50 square meters, designed to meet the highest standards of efficiency and capacity.
At Qingdao Bingyan Refrigeration Equipment Co., Ltd., our flagship offerings include: High-Efficiency Condensing Units,Innovative Air Coolers,State-of-the-Art Evaporative Condensers,Premium Freezers,Durable Cold Room Doors,
Insulated Cold Storage Panels, To explore our full range of products, simply click on any product name or image. Experience unparalleled quality and performance.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, nestled in the picturesque coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. emerges as a beacon of innovation in the realm of industrial and commercial freezing and cold storage. Our forte lies in pioneering the research, development, design, manufacturing, and sales of cutting-edge refrigeration systems and equipment, embodying the spirit of a high-tech enterprise.
From its very inception, the company has been unwaveringly guided by the principles of 'science and technology,' fortified by robust 'management' strategies. Our unwavering commitment is to fulfill market demands and provide exceptional customer service, thereby delivering comprehensive and impeccable refrigeration system solutions, products, and services that exceed client expectations.
Proudly holding over ten prestigious national technology patents, our company is steadfastly devoted to the relentless pursuit of innovation in high-efficiency, energy-saving, and environmentally sustainable refrigeration systems. Our portfolio boasts high-efficiency refrigeration units, energy-conserving barrel pumps, and state-of-the-art PLC intelligent program control boxes, each a testament to our dedication to excellence.
We specialize in the meticulous program design and equipment customization for a diverse array of projects, including food quick-freezing storage, food cold storage, ultra-low temperature cold storage, pharmaceutical storage, and fruit and vegetable air-conditioning storage. Additionally, we excel in workshop air conditioning, quick-freezing, freeze-drying, and innovative thawing devices, tailored to meet the unique needs of each client.
At Qingdao Bingyan Refrigeration Equipment Co., Ltd., we are passionately dedicated to delivering scientifically advanced and meticulously crafted refrigeration system solutions. Our promise encompasses not only the highest quality engineering but also unparalleled after-sales services aimed at ensuring customer satisfaction and enduring relationships.
Bingyan offers an all-encompassing suite of services including sales, bespoke design, precise construction, and diligent after-sales support, creating a seamless experience for our valued customers.
1. Our proficient sales department excels at deeply understanding and capturing customer needs, ensuring that customer intentions are conveyed with precision. We maintain close, clear, and effective communication with our clients throughout the process.
2. The design department is committed to delivering expert and well-considered engineering advice, crafting refrigeration plans that are both reliable and stable, all tailored to the unique requirements of each customer.
3. Our engineering department approaches each construction task with an unwavering commitment to thoroughness and precision, striving for excellence with every project to deliver superior quality outcomes.
4. Always prepared and vigilant, our after-sales department is dedicated to ensuring customer success, offering support and solutions whenever needed to uphold our high standards of service.
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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