NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Cascade Refrigeration System Principle
The NH3/CO2 cascade refrigeration system is ingeniously designed with two stages: the high temperature stage utilizes NH3, while the low temperature stage employs CO2. The innovative mechanism allows NH3 to evaporate within the high temperature level, effectively condensing CO2 gas discharged from the low temperature stage. A dual-function condensation evaporator elegantly bridges these two stages, serving as both the low temperature condenser and the high temperature evaporator.
The heat load is efficiently transferred to the CO2 refrigerant via the end evaporator. As CO2 absorbs heat, it moves it to the high-temperature NH3 refrigerant through the condensing evaporator. The high-temperature NH3 then channels the excess heat to a high-temperature condenser, releasing it into the environment utilizing a cooling medium. Condensed CO2 journeys into the CO2 reservoir, followed by a passage through a dryer filter and throttle valve to enter the CO2 gas-liquid separator. Liquid CO2 is propelled to the CO2 evaporator via a circulation pump, absent of end cooling devices. Post-evaporation, two-phase CO2 is returned to the gas-liquid separator, while gaseous CO2 is drawn by the compressor and compressed back into the condensing evaporator. This seamless cycle continues, ensuring an uninterrupted cascade refrigeration cycle.
Within the NH3/CO2 cascade refrigeration system, each temperature level operates a single refrigerant system independently. The high-temperature NH3 system mirrors conventional models, including a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 system, however, boasts its own CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel, showcasing advanced technology and design.
The The CO2 gas-liquid separator plays a crucial role in isolating CO2 gas droplets from the evaporator in CO2 compression systems, preventing compressor wet strokes, maintaining liquid level stability during pump operation, and storing system liquids when pumps cease operation. When inactive, the separator's volume should accommodate all system CO2 liquid. An auxiliary evaporator atop the separator ensures CO2 pressure remains controlled post-shutdown. In the NH3/CO2 cascade system, the versatile condensing evaporator functions as an NH3-side evaporator and a CO2-side condenser, where the compound liquid evaporates within tubes and CO2 gas condenses into a liquid in the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety through Reduced NH3 Factors:
(1.(1)) The NH3/CO2 cascade system significantly lowers NH3 refrigeration medium's condensing pressure to just 1/10th of traditional ammonia systems, elevating safety.
(1.(2)) NH3 is confined to machine and equipment rooms, akin to a 'tiger in a cage,' monitored by skilled technicians to ensure utmost safety.
(1.(3)) NH3's superior heat transfer properties are fully utilized in the high-temperature region, efficiently cooling CO2.
(2) CO2 safely functions within personnel-intensive areas (e.g., single-freezing machines) and warehouses, ensuring the protection 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. offers tailored solutions perfectly suited to your needs. Unsure of the right model for your aquatic product processing? Simply reach out to us with your requirements, and we'll assist you in finding the ideal variable frequency refrigeration unit.Our team of expert engineers is dedicated to crafting bespoke solutions, ensuring your specific demands are met with precision and efficiency.
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This expansive project spans an impressive area of 60,542 square meters, with a grand total construction area of 72,370.31 square meters. It features a state-of-the-art production workshop and a vast cold storage section extending over 65,538.50 square meters.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. proudly presents our flagship offerings: High-efficiency Condensing Units,Advanced Air Coolers,Innovative Evaporative Condensers,Top-tier Freezers,Premium Cold Room Doors,
Durable Cold Storage Panels, For an exclusive glimpse into more of our extraordinary products, simply click on the product name or image.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Established in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is nestled in the scenic coastal city of Qingdao. We are a high-tech enterprise that seamlessly integrates industrial and commercial freezing, along with cold storage solutions, encompassing every aspect from R&D and design to manufacturing and sales of cutting-edge refrigeration equipment.
From the very beginning, our company has steadfastly embraced 'science and technology' as our beacon, with 'management' as our assurance, aiming to satisfy market demands and deliver exceptional customer service. Our mission is to present our clients with flawless refrigeration system solutions, products, and unparalleled services.
Boasting over ten national technology patents, our company is dedicated year-round to the innovation of high-efficiency, energy-saving, and environmentally-friendly refrigeration system configurations. We specialize in high-performance refrigeration units, energy-conserving barrel pumps, and sophisticated PLC intelligent program control boxes, among many other advancements.
Our expertise extends to the design and equipment customization for a variety of projects, including food quick-freezing storage, advanced food cold storage, ultra-low temperature cold storage, pharmaceutical storage, fruit and vegetable air-conditioning storage, workshop climate control, quick-freezing and freeze-drying, and state-of-the-art thawing devices.
BINGYAN IS DEDICATED TO DELIVERING CUSTOMERS SCIENTIFIC AND LOGICAL REFRIGERATION SYSTEM SOLUTIONS, COUPLED WITH TOP-NOTCH ENGINEERING AND EXEMPLARY AFTER-SALES SERVICES.
Bingyan offers an all-encompassing suite of services, covering every vital aspect from sales and design to meticulous construction and unparalleled after-sales support.
1. Our sales department excels at deeply understanding and precisely capturing customer needs, ensuring clear and accurate communication of customer intentions, while maintaining a seamless and direct line of communication with our valued clients.
2. The design department is committed to furnishing customers with expert and pragmatic engineering suggestions, meticulously crafting reliable and stable refrigeration plans tailored to meet each customer's unique needs.
3. Our engineering department approaches each construction phase with utmost diligence, meticulously executing every task, and striving for excellence to deliver outstanding, high-quality projects.
4. Our dedicated after-sales department is perpetually on alert and ready to act, guaranteeing the seamless 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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