NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of Cascade Refrigeration System
In the innovative NH3/CO2 cascade refrigeration system, an impeccable fusion of two stages is achieved: the high-temperature stage, utilizing NH3 as the refrigerant, and the low-temperature stage, employing CO2. The distinguished evaporation process of NH3 at high temperatures facilitates the condensation of CO2 discharged from the lower temperature stage. A versatile condensation evaporator masterfully bridges these stages, serving dually as the condenser for the low-temperature and the evaporator for the high-temperature, ensuring seamless operation across varying conditions.
The thermal exchange within the system is meticulously optimized as the heat load transitions to CO2 through the end evaporator. The absorbed heat by CO2 is further transferred to the high-temperature NH3 refrigerant via the condensing evaporator. Subsequently, the high-temperature NH3 refrigerant gracefully dissipates the heat to the environment through a high-temperature condenser and cooling medium. The resulting condensed CO2 proceeds into the CO2 reservoir and advances to the CO2 gas-liquid separator, passing through a dryer filter and throttle valve. The liquid CO2, propelled by the CO2 circulation pump, enters the CO2 evaporator. Post-evaporation, the returned two-phase CO2 is guided back to the gas-liquid separator, while the gaseous CO2 is channeled by the compressor into the condensing evaporator. This repetition ensures a flawless and continuous cascade refrigeration cycle.
In the NH3/CO2 cascade refrigeration masterpiece, each temperature level is dedicated to a single refrigerant system. The high-temperature NH3 system mirrors conventional setups, complete with a compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 setup is equally equipped, boasting a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel, all working in harmonious synergy.
The The CO2 gas-liquid separator plays a pivotal role in segregating CO2 gas droplets from the evaporator within the CO2 compression refrigeration system, effectively safeguarding the compressor from wet stroke. It maintains a steady liquid level when operational and adeptly holds returning liquid when the pump ceases. As a reservoir during non-operation, its capacity must encompass all system CO2 liquid. An auxiliary evaporator atop the gas-liquid separator ensures pressure stability post-shutdown. In the NH3/CO2 cascade system, the condensing evaporator doubles its function as NH3's evaporator and CO2's condenser, facilitating the condensation of CO2 gas into liquid within the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Minimized NH3 Risk Factors:
(1.(1)) The NH3/CO2 cascade system significantly diminishes NH3 condensing pressure, reducing the charge to approximately a tenth of that in traditional ammonia systems;
(1.(2)) NH3 is securely confined to machine and equipment rooms, akin to a 'tiger in a cage,' vigilantly managed by skilled technicians;
(1.(3)) Optimal utilization of NH3's superior heat transfer characteristics in high-temperature zones enhances CO2 cooling.
(2) CO2's introduction into personnel-dense operational areas (e.g., single-freezing machines) and storage spaces significantly enhances safety for both 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 premier manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is poised to bring your vision to life with our bespoke customization services. If you find yourself unsure of which model would best suit your needs, simply reach out to us with a message.Our team is comprised of several seasoned and professional engineers ready to craft a tailored solution just for you.
Shandong Binzhou Huiyang Cold Chain Logistics Port
The project is an impressive expanse, spanning 60,542 square meters. It encompasses a substantial total construction area of 72,370.31 square meters, incorporating a state-of-the-art production workshop. Within this expansive facility, a dedicated cold storage area spreads over 65,538.50 square meters, ensuring ample space for efficient and seamless operations.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. proudly brings to you an array of innovative solutions. Our expertise lies in crafting top-notch products including state-of-the-art Condensing Units,advanced Air Coolers,high-efficiency Evaporative Condensers,premium Freezers,superior Cold Room Doors,
durable Cold Storage Panels, To explore our complete product line, simply click on the product name or picture for more details. Uncover the excellence that Qingdao Bingyan offers!
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Established in 2011 and nestled in the picturesque coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is a distinguished high-tech enterprise. We seamlessly integrate the realms of industrial and commercial freezing, cold storage, and comprehensive refrigeration systems. Our forte spans from cutting-edge research and development to innovative design, precise manufacturing, and proficient sales, making us a one-stop solution for all your refrigeration needs.
Since our inception, we have steadfastly embraced 'science and technology' as our guiding star and 'management' as our robust foundation. Our unwavering mission is to fulfill market demands with unparalleled customer service, while crafting impeccable refrigeration system solutions, products, and services tailored to perfection for our discerning clientele.
We proudly hold over ten national technology patents, consistently dedicating ourselves to pioneering research and development. Our focus lies in creating high-efficiency, energy-saving, and environmentally friendly refrigeration system configurations. From high-efficiency refrigeration units to energy-saving barrel pumps and the advanced PLC intelligent program control box, we lead the industry with innovation and excellence.
Our expertise shines in the tailored program design and equipment customization for a wide array of projects. These include food quick-freezing storage, food cold storage, ultra-low temperature cold storage, medicine storage, fruit and vegetable air-conditioning storage, workshop air conditioning, as well as quick-freezing, freeze-drying, and thawing devices. We are your trusted partner for all specialized refrigeration solutions.
At BINGYAN, we are dedicated to delivering scientific, methodical refrigeration system solutions while ensuring premier-quality engineering and unparalleled after-sales service.
Bingyan offers a full spectrum of services, encompassing sales, design, construction, and after-sales assistance.
1. Our sales department precisely identifies and comprehends customer requirements, conveys their intentions with accuracy, and maintains robust, ongoing communication with our valued clients.
2. The design department delivers expert and well-grounded engineering advice, fashioning reliable and enduring refrigeration solutions tailored specifically to meet the unique needs of each customer.
3. Our engineering department approaches every construction phase with diligence and precision, aiming for excellence by completing each task with meticulous care to achieve outstanding project quality.
4. The after-sales department stands ever-ready and vigilant, ensuring seamless support and the success of our clients at every turn.
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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