NH3/CO2 Cascade Refrigeration System
1. Principle of NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously crafted into two segments: the high-temperature and low-temperature stages. Here, NH3 operates as the refrigerant in the high-temperature domain, while CO2 takes charge in the low-temperature realm. The high-temperature level employs NH3 evaporation to facilitate the condensation of CO2 refrigerant gas, which is expelled from the low-temperature stage. This seamless transition is achieved through a dual-function condensation evaporator, serving as the condenser for the low-temperature level and as an evaporator for the high-temperature level.
In this sophisticated system, the CO2 refrigerant absorbs heat via an end evaporator, which is then efficiently transferred to the high-temperature NH3 refrigerant through the condensing evaporator. The NH3 refrigerant releases this heat to the environment via a high-temperature condenser, aided by a cooling medium. Once condensed, CO2 enters a reservoir, proceeds through a dryer filter and throttle valve, reaching the CO2 gas-liquid separator. Here, liquid CO2 is propelled by a circulation pump to the CO2 evaporator—absent of end cooling devices like single freezers or chillers. Post-evaporation, CO2 returns to the gas-liquid separator in a two-phase state, with gaseous CO2 drawn by the compressor, compressed back into the condensing evaporator. This cyclical process perpetuates the cascade refrigeration cycle.
In the NH3/CO2 cascade system, the refrigeration mechanism is distinctly divided into two single-refrigerant stages: the high-temperature NH3 system mirrors conventional refrigeration, encompassing a compressor, condenser, liquid storage, gas-liquid separator, and throttling device. Meanwhile, the low-temperature CO2 system includes a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and an expansion vessel, collectively forming a robust and efficient cooling system.
The CO2 Gas-Liquid Separator serves a critical role in the CO2 compression refrigeration system by efficiently separating droplet-laden CO2 gas from the evaporator. This process prevents undesirable compressor wet strokes, maintains a stable liquid level during pump operation, and ensures safe liquid return storage when the pump halts. If employed as a CO2 reservoir during inactive states, the separator's volume must accommodate all system CO2 liquid. Moreover, an auxiliary evaporator atop the separator averts excessive CO2 pressure post-shutdown. In the NH3/CO2 cascade system, the condensing evaporator performs dual functions: evaporating NH3 while condensing CO2 gas into liquid, all within an intricately designed shell.
2. Advantages of NH3/CO2 Cascade Refrigeration System
(1) Mitigated NH3 Safety Hazards:
(1.(1)) The NH3/CO2 cascade refrigeration system profoundly reduces NH3 refrigerant charge condensing pressure to approximately 1/10 of traditional ammonia systems.
(1.(2)) NH3 containment is restricted to the machine and equipment rooms, akin to a "tiger" securely caged and managed by skilled personnel, ensuring safety and reliability.
(1.(3)) Full exploitation of NH3's superior heat transfer properties in high-temperature zones maximizes cooling efficiency for CO2.
(2) CO2's role as a medium extends into personnel-heavy operational areas, such as single-freezing machines and warehouses, safeguarding both personnel and property integrity.
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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. is your partner in innovation, tailoring each product to fit your unique needs. Unsure of which model perfectly aligns with your requirements? Simply reach out to us, and our expertise will guide you.Our team of highly skilled engineers stands ready to craft a bespoke solution just for you, ensuring that every aspect is meticulously designed to meet your specific demands.
Shandong Binzhou Huiyang Cold Chain Logistics Port
This ambitious project spans a vast area of 60,542 square meters, with an impressive total construction area of 72,370.31 square meters. It boasts a state-of-the-art production workshop and a cold storage facility extending over 65,538.50 square meters, designed to meet the most demanding logistics needs.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. proudly presents an array of our main products, meticulously designed to meet your every refrigeration need: Durable and Efficient Condensing Units,Versatile Air Coolers,State-of-the-Art Evaporative Condensers,High-Performance Freezers,Precision-Crafted Cold Room Doors,
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Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is nestled in the picturesque coastal city of Qingdao. Our company stands as a beacon of innovation, seamlessly integrating industrial and commercial freezing and cold storage solutions, alongside cutting-edge research, development, design, manufacturing, and sales of advanced refrigeration systems and equipment. As a high-tech enterprise, we pride ourselves on delivering excellence across all facets of our business.
From the very beginning, Qingdao Bingyan has championed 'science and technology' as our guiding principle and 'management' as our steadfast foundation. We strive relentlessly to fulfill market demands and elevate customer satisfaction, aiming to offer impeccable refrigeration system solutions, products, and services. Our commitment to innovation and excellence ensures that we consistently exceed customer expectations.
Boasting over ten national technology patents, our company is devoted to the relentless pursuit of developing high-efficiency, energy-saving, and eco-friendly refrigeration system configurations. We specialize in high-performance refrigeration units, energy-efficient barrel pumps, and state-of-the-art PLC intelligent program control boxes, all designed to set new industry standards.
Our expertise shines through in the customized program design and equipment of various projects, including food quick-freezing storage, food cold storage, ultra-low temperature cold storage, medical storage, fruit and vegetable air-conditioning storage, workshop air conditioning, quick-freezing and freeze-drying technologies, as well as thawing devices. Our tailored solutions are crafted to meet the unique needs of each client, ensuring optimal performance and reliability.
BINGYAN IS DEDICATED TO DELIVERING CUSTOMERS WITH CUTTING-EDGE AND EFFECTIVE REFRIGERATION SYSTEM SOLUTIONS, ALONGSIDE TOP-NOTCH ENGINEERING AND EXEMPLARY AFTER-SALES SUPPORT.
Bingyan offers an all-encompassing suite of services that covers sales, design, meticulous construction, and unrivaled after-sales service.
1. Our sales department excels in discerning and understanding customer needs with precision, ensuring that all customer intentions are communicated effectively, thus fostering seamless and ongoing client interactions.
2. The design department stands out by providing customers with expert engineering advice, crafting tailored, reliable, and stable refrigeration plans that align perfectly with customer requirements.
3. Our engineering department approaches every construction process with meticulous care, executing each task with a relentless pursuit of excellence, culminating in the creation of high-quality projects.
4. The after-sales department remains ever-vigilant and prepared, dedicated to ensuring the continuous success and satisfaction of our 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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