NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system ingeniously combines a dual-phase approach: a high-temperature stage utilizing NH3 as the refrigerant and a low-temperature stage employing CO2. The brilliance lies in the NH3's evaporation at high temperature which effectively condenses the CO2 gas discharged from the low temperature phase. This seamless connection is achieved through a condensation evaporator, serving dual roles as both the condenser for CO2 at low temperatures and the evaporator for NH3 at high temperatures.
In this system, the heat load is deftly transferred to the CO2 refrigerant via the end evaporator. The absorbed heat by CO2 is then efficiently transferred to the high-temperature NH3 refrigerant through the condensing evaporator. NH3, in turn, transfers this heat to the high-temperature condenser, releasing it into the environment. Condensed CO2 journeys into the CO2 reservoir, navigates through the dryer filter and throttle valve into the gas-liquid separator, and then is propelled into the CO2 evaporator by a circulation pump. This sophisticated cycle of evaporation, compression, and condensation repeats, maintaining an optimal cascade refrigeration cycle.
The NH3/CO2 cascade refrigeration system distinguishes itself with its modular design, comprising separate high and low temperature refrigeration systems, each utilizing single refrigerants. The high-temperature NH3 system mirrors conventional setups with a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. Meanwhile, the CO2 system, tailored for low temperatures, includes a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
The CO2 gas-liquid separator plays a critical role by ensuring the separation of CO2 gas droplets from the evaporator within the CO2 compression refrigeration system. This prevents compressor wet stroke, stabilizes liquid levels during pump operations, and manages liquid returns when the pump is inactive. As a reservoir, it must accommodate the entire CO2 liquid volume. Additionally, an auxiliary evaporator is installed atop the separator to mitigate excessive CO2 pressure post-shutdown. In the NH3/CO2 cascade system, the condensing evaporator functions dually as an NH3 evaporator and a CO2 condenser, where the compound liquid evaporates, absorbs heat in the tube, while CO2 gas condenses into liquid in the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Reduced NH3 Unsafe Factors:
(1.(1)) The NH3/CO2 cascade system significantly lowers NH3 condensing pressure, reducing refrigerant charge to about one-tenth of traditional systems.
(1.(2)) NH3 is confined to the machine and equipment rooms, akin to a 'tiger' kept securely in a 'cage', monitored by experienced personnel.
(1.(3)) Maximizes NH3's excellent heat transfer properties in high-temperature zones to efficiently cool CO2.
(2) CO2 serves as an optimal medium in personnel-heavy areas like operation rooms and warehouses, ensuring safety for both individuals 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 premier manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is dedicated to tailoring our Premium Industrial Refrigeration Equipment to meet your specific demands. If you're unsure of the perfect model to suit your needs, please feel free to reach out to us.Our team of highly skilled and professional engineers is ready to design a bespoke and innovative solution just for you, ensuring the utmost in efficiency and reliability.
Shandong Binzhou Huiyang Cold Chain Logistics Port
The project magnificently spans over a sprawling 60,542 square meters, encompassing a grand total construction area of 72,370.31 square meters. This includes a state-of-the-art production workshop and an expansive cold storage area covering an impressive 65,538.50 square meters.
Our company's main products are Condensing units,Air Cooler,Evaporative condenser,Freezer,Cold Room Doors,
Cold storage panels, To explore our full range of innovative products, simply click on the product name or the accompanying product image.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Established in the picturesque coastal enclave of Qingdao in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. stands as a beacon of innovation in the realm of high-tech enterprises. Our company seamlessly integrates the intricate arenas of industrial and commercial freezing, cold storage, and refrigeration systems, from meticulous research and development to sophisticated design, manufacturing, and cutting-edge sales.
From our very inception, Qingdao Bingyan has passionately embraced 'science and technology' as the cornerstone of our mission, with 'management' as the steadfast framework ensuring our commitment to meet dynamic market demands. We strive to deliver unparalleled customer service, crafting flawless refrigeration system solutions with an unwavering dedication to products and services.
Pioneers in the field, our company proudly holds over a dozen national technology patents. We are deeply invested in the ongoing research and development of high-efficiency, energy-saving, and environmentally-friendly refrigeration systems. Our offerings include superior refrigeration units, cutting-edge energy-saving barrel pumps, and advanced PLC intelligent program control boxes, all designed to set new benchmarks in the industry.
Our expertise predominantly lies in the bespoke design and customization of projects, encompassing a wide range of applications. These include food quick-freezing storage, food cold storage, ultra-low temperature cold storage, medicine storage, and fruit and vegetable air-conditioning storage. We also specialize in workshop air conditioning, quick-freezing, freeze-drying, and innovative thawing devices, ensuring that our solutions meet the diverse needs of our clientele.
BINGYAN IS COMMITTED TO PROVIDING CUSTOMERS WITH SCIENTIFIC AND REASONABLE REFRIGERATION SYSTEM SOLUTIONS, AS WELL AS HIGH-QUALITY ENGINEERING AND AFTER-SALES SERVICES.
Bingyan offers an all-encompassing suite of services that include expert sales, innovative design, meticulous construction, and dedicated after-sales support, ensuring a seamless experience from start to finish.
1. Our sales department excels in understanding and fulfilling customer needs, ensuring intentions are conveyed with precision and fostering a strong, continuous line of communication with our valued clients.
2. The design department crafts bespoke engineering solutions, offering professional and insightful guidance. We tailor robust and stable refrigeration plans that align perfectly with each customer's unique requirements.
3. At the heart of our operations, the engineering department approaches each construction process with utmost diligence, completing tasks with precision and a commitment to excellence, consistently delivering top-tier projects.
4. Our dedicated after-sales department remains ever-ready and vigilant, providing unwavering support to ensure our customers' ongoing success and satisfaction.
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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