NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of Cascade Refrigeration System
NH3/CO2, the cascade refrigeration system marvel, consists of two distinct stages: a high-temperature stage utilizing NH3 as the refrigerant, and a low-temperature stage employing CO2. In this ingenious system, the evaporation of NH3 refrigerant in the high-temperature stage condenses CO2 gas from the low-temperature stage. A pivotal condensation evaporator bridges these stages, acting simultaneously as the condenser for the low stage and the evaporator for the high stage.
The heat load is efficiently transferred to the CO2 refrigerant through the end evaporator. Subsequently, CO2 refrigerant's absorbed heat moves to the high-temperature NH3 refrigerant via the condensing evaporator. The high-temperature NH3 refrigerant then transmits this heat to the high-temperature condenser, dispersing it to the environment through a cooling medium. Condensed CO2 in the condensing evaporator navigates into the CO2 reservoir, progressing into the CO2 gas-liquid separator through a dryer filter and throttle valve. Here, liquid CO2 is propelled to the CO2 evaporator by the CO2 circulation pump, avoiding an end cooling device like a single freezer or chiller. Post-evaporation, two-phase CO2 returns to the gas-liquid separator, where the gaseous CO2 is drawn by the compressor and compressed back into the condensing evaporator. This seamless cycle perpetuates the entire cascade refrigeration process.
NH3/CO2, within this cascade refrigeration system, high and low temperature stages are distinct refrigeration systems, each employing a singular refrigerant. The equipment composition divides accordingly: the high-temperature NH3 refrigeration system mirrors a conventional setup, comprising a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. Conversely, the low-temperature CO2 refrigeration system encompasses a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
The The CO2 gas-liquid separator is crafted to meticulously separate CO2 gas droplets from the evaporator in the CO2 compression refrigeration system, preventing compressor wet stroke, maintaining a stable liquid level during pump operation, and accommodating liquid return from end equipment and pipelines when the pump halts. If employed as a CO2 reservoir during non-operation, its volume must accommodate all system CO2 liquid. Additionally, an auxiliary evaporator atop the gas-liquid separator effectively curtails CO2 pressure elevation post-shutdown. In the NH3/CO2 cascade system, the condensing evaporator adeptly serves as the NH3 side's evaporator and the CO2 side's condenser, where compound liquid evaporation and heat absorption occur in the tube, and carbon dioxide gas converts to liquid within the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Minimized NH3 Safety Concerns:
(1.(1)) The NH3/CO2 cascade system drastically reduces NH3 refrigerant charge condensing pressure, approximately 1/10 compared to conventional ammonia systems;
(1.(2)) NH3 is confined to the machinery and equipment room, akin to a 'tiger' in a 'cage,' overseen by skilled professionals;
(1.(3)) Optimizes NH3's superior heat transfer properties in high-temperature zones to effectively cool CO2.
(2) Utilizing CO2 as a medium within personnel-intensive operation areas, like single-freezing machines and warehouses, ensures the safety 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 leading manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is dedicated to tailoring our products to meet your exact specifications. Unsure about the ideal model for your needs? Reach out to us, and we will guide you every step of the way.Our team of expert engineers is ready to craft a bespoke solution just for you.
Shandong Binzhou Huiyang Cold Chain Logistics Port
Spanning a vast 60,542 square meters, this exceptional project boasts a total construction area of 72,370.31 square meters. It encompasses a state-of-the-art production workshop and a cold storage area measuring an impressive 65,538.50 square meters.
At Qingdao Bingyan Refrigeration Equipment Co., Ltd., the cornerstone of our product lineup includes: State-of-the-art Condensing Units,Innovative Air Coolers,Efficient Evaporative Condensers,High-performance Freezers,Durable Cold Room Doors,
Reliable Cold Storage Panels, To explore our full suite of products, simply click on the product name or image for detailed insights.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, nestled in the picturesque coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. stands as a beacon of innovation in the realm of industrial and commercial refrigeration. We specialize in the comprehensive blend of freezing and cold storage systems, refrigeration system design, and the crafting and distribution of cutting-edge refrigeration equipment, earning our reputation as a high-tech enterprise.
From the very beginning, we have embraced 'science and technology' as our guiding star, with 'management' as our steadfast guarantee, to satisfy market demands and deliver unparalleled customer service. Our mission is to arm customers with flawless refrigeration system solutions, superior products, and exceptional services.
We proudly hold over ten national technology patents, a testament to our dedication to the continual research and development of high-efficiency, energy-saving, and environmentally friendly refrigeration systems. Our product lineup includes high-efficiency refrigeration units, energy-conserving barrel pumps, and advanced PLC intelligent program control boxes, each a cornerstone of innovation.
Our expertise primarily extends to the design and equipment customization for a diverse range of projects. These include food quick-freezing storage, food cold storage, ultra-low temperature cold storage, pharmaceutical storage, and fruit and vegetable air-conditioning storage. We also excel in delivering solutions for workshop air conditioning, quick-freezing, freeze-drying, and thawing devices, ensuring comprehensive coverage of your refrigeration needs.
BINGYAN IS DEDICATED TO DELIVERING CUSTOMERS WITH INNOVATIVE AND WELL-PLANNED REFRIGERATION SYSTEM SOLUTIONS, ENHANCED BY TOP-TIER ENGINEERING AND EXEMPLARY AFTER-SALES SERVICES.
At Bingyan, we offer a holistic suite of services encompassing sales, design, construction, and after-sales assistance, ensuring a seamless experience.
1. Our sales department excels in understanding and interpreting customer needs, seamlessly conveying their intentions while maintaining open and effective communication to foster strong relationships.
2. The design department offers expert advice and crafts bespoke, stable refrigeration plans tailored to meet the unique needs of each customer, ensuring professional and reasonable recommendations.
3. Our engineering department approaches every construction phase with meticulous attention to detail, diligently completing each task and striving for excellence to deliver superior quality projects.
4. The after-sales department is perpetually prepared and vigilant, ensuring ongoing success and satisfaction for our valued 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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