Innovative NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle Behind Our Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system consists of two integral parts: the high-temperature stage and the low-temperature stage. The high-temperature stage utilizes NH3 as the refrigerant, while the low-temperature stage employs CO2. The NH3 refrigerant evaporates in the high-temperature level to condense the CO2 gas from the low-temperature level. This process is facilitated by a condensation evaporator, which serves as both the condenser for the low-temperature level and the evaporator for the high-temperature level, ensuring an efficient and seamless transfer of thermal energy.
Thermal energy is transferred to the CO2 refrigerant via the end evaporator. The CO2 refrigerant then transfers the absorbed heat to the high-temperature NH3 refrigerant through the condensing evaporator. This high-temperature NH3 refrigerant disperses the heat into the environment through a high-temperature condenser. The condensed CO2 in the condensing evaporator moves to the CO2 reservoir, then proceeds through a dryer filter and throttle valve before entering the CO2 gas-liquid separator. Liquid CO2 is pumped to the CO2 evaporator via the CO2 circulation pump, while the two-phase CO2 returns to the gas-liquid separator post-evaporation. The gaseous CO2 is then compressed by the compressor into the condensing evaporator, perpetuating the cycle and completing the cascade refrigeration cycle.
In the NH3/CO2 cascade refrigeration system, the high and low-temperature stages function as independent refrigeration systems using single refrigerants. The high-temperature NH3 refrigeration system, akin to conventional systems, features a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 refrigeration system includes a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel, structured to ensure operational excellence.
CO2 Gas-Liquid SeparatorTheCO2 gas-liquid separator effectively separates CO2 gas droplets from the evaporator in the CO2 compression refrigeration system, preventing compressor wet stroke and stabilizing liquid levels during pump operation. It also accommodates liquid returns from end equipment and pipelines when the pump halts. If used as a reservoir when inactive, its volume must contain all system CO2 liquid. Additionally, an auxiliary evaporator should be placed atop the separator to avert excessive CO2 pressure post-shutdown. In the NH3/CO2 cascade system, the condensing evaporator dual-functions as the NH3-side evaporator and CO2-side condenser, where compound liquid evaporates to absorb heat, condensing CO2 gas into liquid.
2. Unveiling the Advantages of NH3/CO2 Cascade Refrigeration Systems
(1) Enhanced Safety by Reducing NH3-Related Risks:
(1.(1)) The NH3/CO2 cascade system significantly reduces NH3 refrigerant charge condensation pressure to about 1/10th of traditional ammonia systems.
(1.(2)) NH3 is confined to the machine and equipment rooms, akin to a 'tiger in a cage,' monitored by skilled professionals.
(1.(3)) Maximizes NH3's excellent heat transfer properties in high-temperature zones to cool CO2 efficiently.
(2) CO2 serves as a safe medium in personnel-intensive areas (such as single-freezing machines) and warehouses, ensuring safety for 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 |
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011 and nestled in the picturesque coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is a high-tech enterprise that seamlessly integrates the research, development, design, manufacturing, and sales of industrial and commercial refrigeration systems and equipment.
From its inception, the company has steadfastly adhered to the principles of 'Science and Technology' as its guiding light and 'Management' as its foundation. Dedicated to meeting market demands and exceeding customer expectations, Qingdao Bingyan strives to deliver comprehensive refrigeration system solutions, superior products, and unparalleled services.
Boasting more than ten national technology patents, Qingdao Bingyan is deeply committed to R&D initiatives that focus on high-efficiency, energy-saving, and eco-friendly refrigeration configurations. Our product lineup includes high-efficiency refrigeration units, energy-saving barrel pumps, and PLC intelligent program control boxes, among others.
Our expertise extends to the program design and customization of equipment for various projects, including food quick-freezing storage, food cold storage, ultra-low temperature cold storage, pharmaceutical storage, fruit and vegetable air-conditioning storage, workshop air conditioning, quick-freezing and freeze-drying processes, and thawing devices.
Qingdao Bingyan Refrigeration Equipment Co., Ltd. is unwaveringly dedicated to offering customers scientifically advanced and optimal refrigeration system solutions. We also pride ourselves on delivering top-notch engineering services and comprehensive after-sales support.
Bingyan ensures a seamless customer experience by providing an all-encompassing suite of services, including sales, design, construction, and after-sales support.
1. Our sales department excels at accurately discerning and conveying customer requirements. We maintain close and effective communication to ensure all customer intentions are thoroughly understood and met.
2. Our design department offers expert and practical engineering advice, crafting dependable and stable refrigeration plans tailored to the unique needs of each customer.
3. The engineering department approaches every construction task with meticulous attention to detail, striving for perfection and consistently delivering high-quality projects.
4. Our after-sales department is perpetually prepared, ensuring customer success with prompt and reliable support.
Question:What sets your company apart from the competition?
Answer: Our professional designers tailor designs to your specific needs and select the most suitable refrigeration equipment. This ensures high cooling efficiency, energy savings, and significant power conservation, ultimately meeting your objectives.
Q: How robust is your company's expertise and capabilities?
A: Established in 2011, our company boasts a professional cold storage design team, an expert installation team, and seasoned after-sales maintenance personnel. We offer comprehensive cold storage design, installation guidance, and reliable after-sales maintenance services.
Q:Where are you located, and is it possible to visit your factory?
A: Absolutely, we warmly welcome you to visit our factory at any time.
Q:What is your typical delivery time?
A: We aim to deliver within 60 days after confirming your requirements.
Q:What payment methods does your company support?
A: Typically, a 30% down payment is required via T/T after confirming the Proforma Invoice (PI), with the balance due after inspection and before shipment. We accept telegraphic transfer and sight letter of credit.
Q: How soon can I expect a price quote?
A: We usually provide a quote within 24 hours of receiving your inquiry.
Q: What are the shipping options available?
A: We offer multiple shipping options including shipping by sea, by air, and by express courier.
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