NH3/CO2 Cascade Refrigeration System
1. The Principle of NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously designed, consisting of two distinctive stages: the high temperature stage and the low temperature stage. The high temperature stage adeptly employs NH3 as the refrigerant, while the low temperature stage utilizes CO2. The clever mechanism involves the evaporation of NH3 in the high temperature level system to effectively condense the CO2 refrigerant gas from the low temperature level. Connecting these two stages is a sophisticated condensation evaporator, which serves as both the condenser for the low temperature stage and the evaporator for the high temperature stage.
In this advanced system, the heat load is seamlessly transferred to the CO2 refrigerant via the end evaporator. The absorbed heat by the CO2 is then transported to the high-temperature NH3 refrigerant through the condensing evaporator, where it is further conveyed to the high-temperature condenser to release into the environment via the cooling medium. The condensed CO2 finds its way into the CO2 reservoir and progresses to the CO2 gas-liquid separator through a meticulous path involving a dryer filter and throttle valve. Post journey through the CO2 circulation pump, the liquid CO2 is propelled to the CO2 evaporator, and in the absence of an end cooling device, it returns to the gas-liquid separator post-evaporation. Here, the gaseous CO2 is skillfully compressed by the compressor back into the condensing evaporator, perpetuating the cascade refrigeration cycle.
The NH3/CO2 cascade refrigeration system ingeniously utilizes single refrigerant systems at both high and low temperature levels. The high-temperature NH3 refrigeration system mirrors conventional systems by incorporating not just the refrigeration compressor, but also a well-structured assembly of condenser, liquid storage, gas-liquid separator, and throttling device. Meanwhile, the low-temperature CO2 refrigeration system comprises a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and an expansion vessel, all working harmoniously.
The The CO2 gas-liquid separator plays a pivotal role in ensuring the smooth operation of the CO2 compression refrigeration system. It effectively separates CO2 gas droplets from the evaporator, preventing wet strokes of the compressor, maintaining a stable liquid level during pump operations, and storing the end equipment and pipeline liquid return when the pump halts. As a reservoir during non-operation, its capacity is designed to hold the entire CO2 liquid in the system. Additionally, an auxiliary evaporator is strategically positioned atop the gas-liquid separator to preemptively avert high CO2 pressure post-shutdown. Within this NH3/CO2 cascade system, the condensing evaporator serves dually as the NH3 side evaporator and the CO2 side condenser, facilitating the evaporation and heat absorption of compound liquid within the tube and the condensation of CO2 gas into liquid within the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety with Reduced NH3 Risks:
(1.(1)) The NH3/CO2 cascade refrigeration system significantly minimizes the condensing pressure of NH3, with the system charge being merely about 1/10 compared to traditional ammonia refrigeration systems.
(1.(2)) NH3 usage is confined to the machine room and equipment room, akin to a 'tiger' securely 'caged' and monitored by skilled professionals.
(1.(3)) It maximizes the excellent heat transfer properties of NH3 in high-temperature regions for effective cooling of CO2.
(2) CO2 serves safely as a medium in personnel-dense operation areas, such as single-freezing machines and warehouses, ensuring the utmost safety for people 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 distinguished manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. specializes in tailoring our products to meet your specific requirements with precision. If you're uncertain about which model best suits your needs, simply reach out to us and we'll guide you every step of the way.Our team of seasoned professional engineers is dedicated to crafting personalized and innovative solutions tailored specifically for you.
Shandong Binzhou Huiyang Cold Chain Logistics Port
This impressive project spans a vast expanse of 60,542 square meters, boasting a total construction area of 72,370.31 square meters. It includes a state-of-the-art production workshop, complemented by a cold storage area that spans an impressive 65,538.50 square meters, tailored for optimal efficiency.
At Qingdao Bingyan Refrigeration Equipment Co., Ltd., our core offerings include: High-efficiency Condensing Units,Advanced Air Coolers,Innovative Evaporative Condensers,Robust Freezers,Durable Cold Room Doors,
Premium Cold Storage Panels, For an in-depth look at our extensive product range, simply click on the product name or the accompanying image.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is nestled in the picturesque coastal haven of Qingdao. We are a pioneering high-tech enterprise that seamlessly integrates the realms of industrial and commercial freezing and cold storage with cutting-edge refrigeration systems. Our expertise spans the entire spectrum from research and development to design, manufacturing, and sales of refrigeration equipment.
From the very beginning, Qingdao Bingyan has embraced 'science and technology' as our guiding compass, while 'management' stands as our steadfast pillar. Our unwavering mission is to fulfill market demands and surpass customer expectations with impeccable refrigeration system solutions, superior products, and unmatched services.
Armed with over ten prestigious national technology patents, our company is dedicated to the relentless pursuit of developing high-efficiency, energy-saving, and environmentally friendly refrigeration configurations. Our innovation extends to high-efficiency refrigeration units, energy-conserving barrel pumps, and PLC intelligent program control boxes, ensuring cutting-edge solutions for every requirement.
Our expertise shines in program design and equipment customization for a diverse range of projects. These include food quick-freezing and cold storage, ultra-low temperature preservation, medicine storage solutions, and fruit and vegetable air-conditioning. Additionally, our capabilities encompass workshop air conditioning, quick-freezing and freeze-drying, and advanced thawing devices.
At BINGYAN, we are passionately dedicated to delivering customers innovative and meticulously crafted refrigeration system solutions. Our commitment goes beyond just providing exceptional engineering; it extends to superior after-sales services that ensure complete satisfaction and operational excellence.
At Bingyan, we offer an all-encompassing suite of services that includes insightful sales, bespoke design, precise construction, and unwavering after-sales support.
1. Our sales department excels in discerning and capturing the unique needs of our clients, ensuring that their intentions are accurately communicated and fostering a seamless flow of communication to achieve unparalleled synergy with our customers.
2. The design department is committed to offering clients expert and bespoke engineering advice, intricately crafting robust and sustainable refrigeration plans tailor-made to meet individual customer requirements.
3. Our engineering department approaches each construction phase with utmost diligence, meticulously completing every task. We pursue excellence with a relentless focus on delivering projects of impeccable quality.
4. The after-sales department is perpetually poised and prepared, ensuring that our customers' success is our top priority, providing steadfast support whenever needed.
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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