NH3/CO2 Cascade Refrigeration System Overview
1. NH3/CO2: Understanding the Principle of Cascade Refrigeration
The NH3/CO2 cascade refrigeration system artfully combines two distinct stages: a high-temperature stage utilizing NH3 as the refrigerant and a low-temperature stage employing CO2. In the high-temperature system, the evaporation of NH3 refrigerant ingeniously condenses the CO2 refrigerant gas emitted from the low-temperature stage. This is achieved through a condensation evaporator, which serves the pivotal role of linking the high and low-temperature phases. It functions dually as the condenser for the low-temperature stage and the evaporator for the high-temperature stage, ensuring seamless integration and functionality across the system.
Through an end evaporator, the heat load is effectively transferred to the CO2 refrigerant, which then conveys the absorbed heat to the high-temperature NH3 refrigerant via the condensing evaporator. The NH3 refrigerant, in turn, transfers the heat to a high-temperature condenser, releasing it smoothly into the environment with the aid of a cooling medium. Following condensation in the condensing evaporator, the CO2 moves to the CO2 reservoir and subsequently to the CO2 gas-liquid separator, passing through a dryer filter and throttle valve. The liquid CO2 is pushed to the CO2 evaporator by a circulation pump, bypassing any end cooling devices. Post-evaporation, two-phase CO2 circulates back to the gas-liquid separator, with gaseous CO2 being compressed anew in the condensing evaporator, perpetuating the entire cascade refrigeration cycle.
In the NH3/CO2 cascade refrigeration system, separate refrigeration systems are established for each temperature level, both employing singular refrigerants. The high-temperature NH3 system mirrors traditional refrigeration systems, featuring essential components such as a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. Conversely, the low-temperature CO2 refrigeration system boasts a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and an expansion vessel, all meticulously configured to ensure optimal performance.
The The CO2 gas-liquid separator plays a critical role in the CO2 compression refrigeration system by effectively separating CO2 gas droplets post-evaporation. This prevents compressor wet stroke, maintains a stable liquid level during pump operation, and allows for efficient liquid return management when the pump halts. Designed to function as a CO2 reservoir in dormant periods, it must accommodate the entire system's CO2 liquid. Additionally, an auxiliary evaporator atop the separator ensures CO2 pressure remains controlled after system shutdown. Within the NH3/CO2 cascade framework, the condensing evaporator functions dually as an NH3-side evaporator and CO2-side condenser. Inside the tube, the compound liquid evaporates, absorbing heat, while within the shell, CO2 is seamlessly condensed into liquid form.
2. Excelling with NH3/CO2 Cascade Refrigeration: Key Advantages
(1) Enhancing Safety by Reducing NH3 Risks:
(1.(1)) The NH3/CO2 cascade system significantly diminishes the condensing pressure of NH3, requiring only about one-tenth of the refrigerant charge compared to conventional ammonia systems.
(1.(2)) NH3 is respectfully confined to designated areas such as the machine and equipment rooms, akin to a 'tiger' within a 'cage', under the vigilant watch of professional personnel.
(1.(3)) The system exploits NH3's superior heat transfer capabilities in high-temperature regions to efficiently cool CO2.
(2) CO2 Introduced as a Safer Medium: CO2 is safely integrated into personnel-dense operational environments, such as single-freezing units and storage facilities, ensuring the utmost 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 leading manufacturer, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is dedicated to creating tailor-made solutions to meet your precise needs. Unsure which model of our Advanced Condenser Unit for Reliable Aquatic Product Refrigeration is right for you? Simply reach out to us, and our team of experts will guide you to the perfect choice.Our team of highly skilled and professional engineers is ready to craft a personalized solution just for you, ensuring that our advanced technology aligns perfectly with your specific requirements.
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The project spans an impressive area of 60,542 square meters, with a grand total construction area of 72,370.31 square meters. Included in this expansive space are a state-of-the-art production workshop and a vast cold storage area, measuring a remarkable 65,538.50 square meters, designed to meet all your refrigeration needs with precision and efficiency.
Our esteemed company's premier offerings include: State-of-the-Art Condensing Units,High-Efficiency Air Coolers,Innovative Evaporative Condensers,Advanced Freezers,Precision-Crafted Cold Room Doors,
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Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011 in the picturesque coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. stands as a beacon of innovation in the realm of refrigeration. Specializing in the integration of industrial and commercial freezing, cold storage systems, and comprehensive refrigeration equipment solutions, we are a pioneering high-tech enterprise committed to excellence in design, manufacturing, and sales.
From the very beginning, Qingdao Bingyan has embraced 'science and technology' as the cornerstone of our philosophy, using 'management' as the backbone to fulfill market demands and deliver unparalleled customer service. Our mission is to offer impeccable refrigeration system solutions, products, and services that exceed customer expectations.
Boasting over ten national technology patents, our company is steadfast in its dedication to the development of high-efficiency, energy-saving, and environmentally friendly refrigeration systems. We pride ourselves on our advanced refrigeration units, energy-saving barrel pumps, and state-of-the-art PLC intelligent program control boxes, setting new standards for innovation and sustainability.
We specialize in the meticulous program design and bespoke equipment customization for a wide range of projects. From food quick-freezing storage to ultra-low temperature cold storage, medicine storage, and fruit and vegetable air-conditioning storage, to workshop air conditioning and quick-freezing freeze-drying and thawing devices, our expertise ensures tailored solutions for all your refrigeration needs.
BINGYAN IS DEDICATED TO OFFERING CUSTOMERS SCIENTIFICALLY SOUND AND LOGICALLY DESIGNED REFRIGERATION SYSTEM SOLUTIONS, COUPLED WITH SUPERIOR ENGINEERING AND EXEMPLARY AFTER-SALES SUPPORT.
Bingyan offers an all-encompassing suite of services, including sales, design, construction, and after-sales support, ensuring a seamless customer experience.
1. Our sales department masterfully discerns and comprehends customer requirements, accurately conveying their intentions and maintaining proactive and open communication with our clients to ensure the smoothest possible interaction.
2. The design department presents clients with expert, tailored engineering recommendations, crafting reliable, stable refrigeration plans that perfectly meet specific client needs.
3. The engineering department meticulously oversees every phase of the construction process, committing to excellence in each task to create projects of the highest quality and integrity.
4. The after-sales department remains perpetually on alert and fully prepared to guarantee our customers' success and satisfaction at all times.
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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