Experience the cutting-edge NH3/CO2 cascade refrigeration system designed to elevate your cooling demands.
1. The Principle of the NH3/CO2 Cascade Refrigeration System: Unveiling a strategic synergy of innovation and performance.
The NH3/CO2 cascade refrigeration system is an ingenious blend of two cooling stages: high and low temperature. The high temperature stage utilizes NH3 as its primary refrigerant, while the low temperature stage incorporates CO2. Ingeniously, the NH3's evaporative process at the high temperature level effectively condenses the CO2 gas from the low temperature stage. A condensation evaporator harmoniously connects these dual stages, functioning dually as a condenser for the low temperature level and as an evaporator for the high temperature stage, ensuring seamless operation.
Heat transfer within this system is a marvel of engineering. The CO2 refrigerant absorbs the heat load via the end evaporator, efficiently channeling it to the high-temperature NH3 refrigerant through the condensing evaporator. The NH3 refrigerant then coordinates with the high-temperature condenser to release the accumulated heat into the environment, facilitated by a cooling medium. Progressing through the system, condensed CO2 enters the reservoir, traverses the dryer filter and throttle valve, and is propelled to the CO2 evaporator by the circulation pump. Post-evaporator, the CO2 in its two-phase state returns to the gas-liquid separator, with gaseous CO2 compressed and cycled back into the condensing evaporator, completing the innovative cascade cycle.
The NH3/CO2 cascade system ingeniously divides into two distinct refrigeration systems, each powered by a single refrigerant. This duality extends to its composition: the high-temperature NH3 system mirrors conventional setups with a compressor, condenser, liquid storage, gas-liquid separator, and throttling device. In contrast, the low-temperature CO2 system features a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel, offering a comprehensive cooling solution.
The The CO2 gas-liquid separator is an integral component, expertly separating CO2 gas droplets post-evaporation to prevent compressor wet strokes. It ensures stable liquid levels during pump operation and accommodates liquid return when the pump ceases. Serving additionally as a CO2 reservoir when inactive, its capacity must encompass the entire CO2 liquid volume. To counter high CO2 pressure post-shutdown, an auxiliary evaporator is strategically placed atop the gas-liquid separator. Equally vital, the NH3/CO2 system's condensing evaporator functions as both NH3's evaporator and CO2's condenser, where compound liquid evaporation meets heat absorption within the tube, and CO2 gas condenses into liquid form within the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System: A leap in safety and efficiency.
(1) Minimized NH3 Safety Concerns:
(1.(1)) The NH3/CO2 cascade system dramatically reduces the NH3 refrigerant charge's condensing pressure to a mere fraction (approximately 1/10) of traditional systems.
(1.(2)) NH3 is confined within controlled environments like the machine room, secured under the vigilant oversight of skilled professionals, akin to a 'tiger in a cage.'
(1.(3)) Optimizes NH3's superior heat transfer abilities in high-temperature regions to cool CO2 efficiently.
(2) Safety Assurance with CO2: A safe refrigerant for densely populated operational areas like single-freezing machines and warehouses, safeguarding 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 dedicated manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. specializes in crafting custom solutions tailored to your precise needs. If you're uncertain about the ideal model for your requirements, feel free to reach out to us, and we'll assist you in making the best choice.Our team of seasoned engineers is on hand to design and deliver a bespoke solution that perfectly matches your specific requirements.
Shandong Binzhou Huiyang Cold Chain Logistics Port
The grand scale of this project is truly impressive, spanning a vast area of 60,542 square meters. The total construction area is a remarkable 72,370.31 square meters, designed to include a state-of-the-art production workshop. The cold storage area alone measures an expansive 65,538.50 square meters, making it a pivotal component of the facility.
At Qingdao Bingyan Refrigeration Equipment Co., Ltd., we proudly offer an extensive selection of high-quality products, tailored to meet diverse needs. Our main product lineup includes: State-of-the-art Condensing Units,Advanced Air Coolers,Efficient Evaporative Condensers,High-performance Freezers,Durable Cold Room Doors,
Premium Cold Storage Panels, For more detailed information about each product, simply click on the product name or image to explore further.

Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is beautifully nestled in the vibrant coastal city of Qingdao. We are a high-tech enterprise that seamlessly integrates industrial and commercial freezing solutions, cold storage innovations, and comprehensive refrigeration systems. Our expertise spans research, development, design, manufacturing, and sales of state-of-the-art refrigeration equipment.
From day one, our company has been driven by the mantra of 'science and technology' as our guiding beacon, combined with robust 'management' to ensure we meet market demands with finesse. Our ultimate goal is to deliver impeccable refrigeration system solutions that cater to our customers' needs, offering unparalleled products and services.
Boasting over ten national technology patents, our company is perpetually dedicated to advancing high-efficiency, energy-saving, and eco-friendly refrigeration system configurations. Our cutting-edge offerings include top-tier refrigeration units, energy-efficient barrel pumps, and PLC intelligent program control boxes, among others.
Our expertise is primarily focused on tailored program design and equipment customization for a diverse range of projects. These include quick-freezing storage for foods, food cold storage, ultra-low temperature cold storage, pharmaceutical storage solutions, fruit and vegetable air-conditioned storage, as well as workshop air conditioning. Additionally, we excel in quick-freezing, freeze-drying, and thawing devices.
At Bingyan, we are passionately dedicated to delivering state-of-the-art, scientifically sound refrigeration system solutions. Our commitment extends beyond just engineering excellence to encompass unparalleled customer service from inception to the successful completion of projects.
Bingyan stands out by offering an all-encompassing service package that includes expert sales, innovative design, meticulous construction, and reliable after-sales support.
1. Our sales department is adept at discerning and understanding the unique requirements of each customer, precisely translating those needs into actionable insights, and maintaining seamless, proactive communication to ensure client satisfaction.
2. The design department excels in delivering bespoke engineering solutions. Offering professional guidance, we craft refrigeration plans that are both reliable and tailored to the specific needs of our clients, ensuring stability and efficiency.
3. Our engineering team approaches every construction phase with precision and care, completing each task with a commitment to excellence. We strive to achieve the highest standards, delivering projects of unparalleled quality.
4. The after-sales department is perpetually prepared to assist, ensuring that our clients' operations continue smoothly and successfully, reflecting our ongoing dedication to customer success.

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.