Innovative NH3/CO2 Cascade Refrigeration System
1. Pioneering Principle of NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously crafted from two distinct stages: the high-temperature stage utilizing NH3 and the low-temperature stage utilizing CO2. In this sophisticated system, the evaporation of NH3 in the high-temperature stage condenses the CO2 gas discharged from the low-temperature stage. A condensation evaporator ingeniously links both stages, serving as both the condenser for the low-temperature stage and the evaporator for the high-temperature stage.
Heat load seamlessly transfers to the CO2 refrigerant via the end evaporator. The absorbed heat in the CO2 refrigerant is then conveyed to the high-temperature NH3 refrigerant through the condensing evaporator. This NH3 refrigerant further transfers the heat to the high-temperature condenser, releasing it to the environment through a cooling medium. The condensed CO2 then enters a reservoir and subsequently, through a dryer filter and throttle valve, reaches a gas-liquid separator. A CO2 circulation pump propels the liquid CO2 to the evaporator, and the ensuing two-phase CO2 returns to the separator. The gaseous CO2 is then compressed back into the condensing evaporator, thus perpetuating the entire cascade refrigeration cycle.
In the NH3/CO2 cascade refrigeration system, the high and low-temperature levels each utilize a single refrigerant. The high-temperature NH3 refrigeration system comprises a conventional setup including a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 refrigeration system encompasses a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
TheCO2gas-liquid separator plays a crucial role in isolating CO2 gas droplets from the evaporator to prevent compressor wet stroke, maintain a stable liquid level during pump operation, and store liquid return when the pump is inactive. If used as a CO2 reservoir when not running, it should accommodate all CO2 liquid within the system. An auxiliary evaporator should be installed atop the gas-liquid separator to prevent excessive CO2 pressure after shutdown. In the NH3/CO2 cascade refrigeration system, the condensing evaporator acts dually as the NH3 evaporator and CO2 condenser, where compound liquid evaporates and absorbs heat within the tube, and CO2 gas condenses into a liquid in the shell.
2. Unmatched Advantages of NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety with Reduced NH3 Risks:
(1.(1)) The NH3/CO2 cascade refrigeration system significantly lowers NH3 condensing pressure, curbing it to approximately 1/10 of traditional ammonia systems.
(1.(2)) NH3 is confined to the machine and equipment rooms, akin to a 'tiger' in a 'cage', monitored by professional technicians.
(1.(3)) Optimal utilization of NH3's superior heat transfer properties in high-temperature regions to efficiently cool CO2.
(2) CO2, as the medium, ensures safety by entering personnel-intensive operation rooms (such as single-freezing chambers) and warehouses, securing 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 |
Qingdao Bingyan Refrigeration Equipment Co., Ltd. Qingdao Bingyan Refrigeration Equipment Co., Ltd., established in 2011 in the enchanting coastal city of Qingdao, is a premier high-tech enterprise. We specialize in the comprehensive development, design, manufacturing, and sales of industrial and commercial freezing, cold storage, and refrigeration systems and equipment.
Since our inception, we have steadfastly adhered to the principles of 'science and technology' as our guiding force and 'management' as our assurance. Our mission is to meet market demands and exceed customer expectations by delivering impeccable refrigeration system solutions, products, and services.
Proud holders of more than ten national technology patents, we are dedicated to the research and development of high-efficiency, energy-saving, and environmentally-friendly refrigeration systems. Our offerings include state-of-the-art refrigeration units, energy-efficient barrel pumps, and PLC intelligent program control boxes.
We excel in program design and equipment customization for a wide range of 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, and thawing devices.
At BINGYAN, we are dedicated to delivering scientifically sound and efficient refrigeration system solutions, paired with high-quality engineering and unparalleled after-sales services. Your satisfaction is our utmost priority.
Bingyan offers an all-encompassing suite of services, spanning sales, design, construction, and after-sales support, ensuring a seamless and satisfying customer experience.
1. Our sales department thoroughly comprehends customer needs, precisely conveys their intentions, and maintains seamless and ongoing communication to ensure complete satisfaction.
2. The design department offers expert and practical engineering advice, custom-tailoring reliable and stable refrigeration plans that cater to each customer's specific requirements.
3. The engineering department approaches every construction task with meticulous attention to detail, completing each process with precision to deliver projects of the highest quality.
4. Our after-sales department is perpetually on standby, ready to ensure that our customers achieve success with unwavering support and dedicated service.
Q:What's your advantage?
A: Our team of professional designers tailors refrigeration solutions to your specific needs, ensuring you get the most appropriate equipment. This results in superior cooling efficiency, significant energy savings, and reduced power consumption.
Q: How strong is your company?
A: Established in 2011, our company boasts a top-tier cold storage design team, skilled installation experts, and seasoned after-sales maintenance personnel. We offer comprehensive services, from cold storage design and installation guidance to after-sales support.
Q:Where are you located? Can I visit you?
A: Absolutely, we welcome you to visit our factory at any time.
Q:How about the delivery time?
A: Typically, we deliver within 60 days after your requirements are confirmed.
Q:What kind of payment does your company support?
A: We generally require a 30% down payment via T/T after confirming the Proforma Invoice (PI), with the balance due after inspection and before shipment. We accept both telegraphic transfer and sight letter of credit.
Q: When can I get the price?
A: We usually provide quotes within 24 hours of receiving your inquiry.
Q: Which shipping methods can you provide?
A: We offer shipping by sea, air, and express delivery.
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