NH3/CO2 Cascade Refrigeration System
1. The NH3/CO2 Cascade Refrigeration System Principle
The NH3/CO2 cascade refrigeration system artfully combines a high-temperature stage and a low-temperature stage. Ingeniously, NH3 serves as the refrigerant for the high-temperature stage, while CO2 is the chosen refrigerant for the low-temperature stage. The brilliance of this system lies in using the evaporation of NH3 refrigerant in the high-temperature level to condense CO2 refrigerant gas released from the low-temperature level. An intricate condensation evaporator seamlessly links the high and low levels, acting dually as a condenser for the low-temperature level and an evaporator for the high-temperature level.
In the cascade system, the CO2 refrigerant absorbs the heat load via the end evaporator, transferring it to the NH3 refrigerant in the condensation evaporator. The high-temperature NH3 refrigerant then elegantly releases this heat to the environment through the high-temperature condenser. The condensed CO2 moves gracefully into the CO2 reservoir, advancing through the dryer filter and throttle valve into the CO2 gas-liquid separator. Liquid CO2 is driven by the CO2 circulation pump to the CO2 evaporator, with the absence of an end cooling device such as a single freezer. Post evaporation, two-phase CO2 returns to the gas-liquid separator, while gaseous CO2 is compressed by the compressor back into the condensing evaporator, perpetuating the entire cycle and ensuring an efficient cascade refrigeration process.
NH3/CO2 in the cascade refrigeration system operates with high ingenuity, dividing into two distinct refrigeration systems for each temperature level. The high-temperature NH3 system mirrors conventional designs, incorporating a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and a throttling device. Meanwhile, the low-temperature CO2 system is equipped with a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and an expansion vessel, all working in harmony to achieve optimal cooling performance.
The The CO2 gas-liquid separator is expertly engineered to eliminate CO2 gas droplets from the evaporator, preventing compressor wet strokes and maintaining a stable liquid level during pump operation, while efficiently storing liquid return when the pump halts. When the pump is idle, this separator can serve as the system's CO2 reservoir, aptly containing all liquid CO2. The innovation continues with an auxiliary evaporator positioned atop the separator to avert excessive CO2 pressure upon shutdown. Ingeniously, in this NH3/CO2 cascade system, the condensing evaporator doubles as the NH3 evaporator and the CO2 condenser, efficiently converting gaseous CO2 into liquid within the shell through compound liquid heat absorption and evaporation.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety with Reduced NH3 Risk Factors:
(1.(1)) The NH3/CO2 cascade refrigeration system significantly minimizes NH3 refrigerant charge pressure to a mere 1/10 of traditional ammonia systems, vastly enhancing safety.
(1.(2)) By confining NH3 to machine and equipment rooms, akin to a 'tiger in a cage,' it is vigilantly overseen by skilled professionals, ensuring safety.
(1.(3)) This system optimally capitalizes on NH3's superior heat transfer properties in high-temperature regions to efficiently cool CO2.
(2) CO2 Advantageously Serves as a Medium in Personnel-Dense Areas, like single-freezing machines and warehouses, ensuring both personnel and property safety.
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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. takes pride in offering tailored customization of our products to precisely meet your needs. If you're uncertain about the most suitable model for your requirements, feel free to reach out to us with your inquiries.Our team of expert engineers is dedicated to crafting bespoke solutions that perfectly align with your specific demands, ensuring optimal performance and satisfaction.
Shandong Binzhou Huiyang Cold Chain Logistics Port
This impressive project spans a vast area of 60,542 square meters, with a total construction expanse reaching 72,370.31 square meters. It features state-of-the-art facilities including a cutting-edge production workshop and a cold storage area encompassing a remarkable 65,538.50 square meters.
Discover the core offerings of Qingdao Bingyan Refrigeration Equipment Co., Ltd.: State-of-the-art Condensing Units,Advanced Air Coolers,High-efficiency Evaporative Condensers,Reliable Freezers,Durable Cold Room Doors,
Innovative Cold Storage Panels, For a deeper dive into our extensive product portfolio, feel free to click on any product name or accompanying image.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Established in 2011 in the stunning coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. stands as a beacon of innovation in the high-tech industry. We seamlessly integrate the realms of industrial and commercial freezing, cold storage, and advanced refrigeration systems. Our expertise extends from research and development to design, manufacturing, and sales, creating a comprehensive suite of refrigeration solutions.
From our inception, Qingdao Bingyan has passionately pursued a vision driven by 'science and technology,' ensuring exceptional management practices to continually meet market demands and deliver unparalleled customer service. Our mission is to craft impeccable refrigeration system solutions and deliver unmatched quality in our products and services.
Proud holders of over ten prestigious national technology patents, we dedicate ourselves to the relentless pursuit of developing high-efficiency, energy-saving, and environmentally friendly refrigeration systems. Our innovative offerings include top-tier refrigeration units, energy-efficient barrel pumps, and cutting-edge PLC intelligent program control boxes, among other breakthrough technologies.
Our expertise shines in providing program design and bespoke equipment solutions for diverse projects, including food quick-freezing storage, food cold storage, ultra-low temperature cold storage, pharmaceutical storage, air-conditioned fruit and vegetable storage, workshop air conditioning, quick-freezing and freeze-drying systems, and advanced thawing devices.
BINGYAN IS DEDICATED TO DELIVERING CUSTOMERS SCIENTIFICALLY ADVANCED AND REASONABLY DEVISED REFRIGERATION SYSTEM SOLUTIONS, COUPLED WITH FIRST-CLASS ENGINEERING EXPERTISE AND EXEMPLARY AFTER-SALES SUPPORT.
Bingyan extends a full spectrum of services encompassing sales, innovative design, meticulous construction, and reliable after-sales support.
1. The sales department precisely identifies and comprehends customer needs, effectively translating customer intentions, and maintaining robust communication channels for seamless customer interaction.
2. The design department offers expert engineering advice, crafting dependable and stable refrigeration plans tailored meticulously to each customer's unique requirements.
3. The engineering department is committed to excellence, methodically managing every aspect of the construction process to deliver high-quality projects with unparalleled precision.
4. The after-sales department stands ready and vigilant, ensuring the ongoing success and satisfaction of 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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