NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of Cascade Refrigeration System
NH3/CO2 cascade refrigeration systems consist of two stages: high-temperature and low-temperature. The high-temperature stage uses NH3 as the refrigerant, while the low-temperature stage employs CO2. The NH3 refrigerant evaporates at the high-temperature level to condense CO2 gas from the low-temperature level. A condensation evaporator connects both stages, serving as the CO2 condenser and NH3 evaporator.
Heat is transferred to the CO2 refrigerant via the end evaporator. The absorbed heat is then moved to the high-temperature NH3 refrigerant through the condensing evaporator, which releases it to the environment via the cooling medium. The condensed CO2 is stored in a reservoir, passed through a dryer filter and throttle valve, and then directed into the CO2 gas-liquid separator. Liquid CO2 is pumped to the CO2 evaporator, and after evaporation, two-phase CO2 returns to the separator. The gaseous CO2 is compressed back into the condensing evaporator, repeating the cycle for continuous refrigeration.
In the NH3/CO2 cascade system, high and low-temperature stages function with single refrigerants. High-temperature NH3 systems include conventional components like compressors, condensers, liquid storage, gas-liquid separators, and throttling devices. The low-temperature CO2 system comprises CO2 compressors, condensing evaporators, reservoirs, gas-liquid separators, filter dryers, pumps, throttling devices, evaporators, and expansion vessels.
The CO2 gas-liquid separator isolates CO2 gas droplets from the evaporator, preventing wet compression strokes and maintaining a stable liquid level during pump operation. It doubles as a CO2 reservoir when the system is off, storing all CO2 liquid. An auxiliary evaporator should be installed on top to manage high-pressure CO2 post-shutdown. In NH3/CO2 cascade systems, the condensing evaporator acts both as an NH3 evaporator and a CO2 condenser, where compound liquid evaporates to absorb heat, condensing CO2 gas into liquid.
2. Advantages of NH3/CO2 Cascade Refrigeration System
(1) Reduced NH3 Unsafe Factors:
(1.(1)) The NH3/CO2 cascade system significantly lowers the NH3 condensing pressure, nearly one-tenth of traditional ammonia systems.
(1.(2)) NH3 is confined to the machine or equipment room, securely managed by professional technicians.
(1.(3)) Maximum utilization of NH3's excellent heat transfer properties in high-temperature regions to cool CO2.
(2) CO2 as a Medium: CO2 systems ensure personnel safety when used in occupied areas, such as single freezing machines and warehouses.
19984ec7
| 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 leading high-tech enterprise. We specialize in the integration of industrial and commercial freezing, cold storage solutions, and advanced refrigeration systems. Our expertise spans research and development, design, manufacturing, and sales of top-tier refrigeration equipment.
Since our inception, we have steadfastly adhered to the principles of 'science and technology' as our guiding star and 'management' as our assurance to meet dynamic market demands. Our mission is to deliver unparalleled customer service and comprehensive refrigeration system solutions, ensuring our products and services exceed expectations.
With over ten national technology patents, Qingdao Bingyan is dedicated to the perpetual development of high-efficiency, energy-saving, and eco-friendly refrigeration systems. Our portfolio includes state-of-the-art refrigeration units, energy-efficient barrel pumps, and intelligent PLC program control boxes, amongst other innovations.
We excel in the design and customization of equipment for a variety 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.
BINGYAN is dedicated to delivering innovative and meticulously engineered refrigeration solutions. We pride ourselves on offering top-tier engineering and unparalleled after-sales services to our valued customers.
At Bingyan, we offer a full spectrum of services encompassing sales, bespoke design, expert construction, and dedicated after-sales support.
1. Our sales team excels at precisely understanding and capturing customer needs. They ensure customer intentions are accurately communicated and maintain seamless and effective communication throughout.
2. The design team provides expert and tailored engineering suggestions, crafting dependable and efficient refrigeration plans that meet our clients' unique requirements.
3. Our engineering team approaches every construction phase with precision and dedication, meticulously handling each task to achieve outstanding, high-quality results.
4. The after-sales department remains ever-vigilant and prepared, ensuring our customers' continued success and satisfaction.
Q:What's your advantage?
A:Our professional designers tailor designs to your specific needs and select the most suitable refrigeration equipment. This ensures optimal cooling efficiency, energy savings, and reduced power consumption.
Q:How strong is your company?
A: Established in 2011, our company boasts a team of expert cold storage designers, installers, and seasoned after-sales maintenance personnel. We offer comprehensive cold storage design, installation guidance, and maintenance services.
Q:Where are you? Can I visit you?
A: Certainly! You are welcome to visit our factory at any time.
Q:How about the delivery time?
A: Delivery is typically within 60 days after we confirm your requirements.
Q:What kind of payment does your company support?
A: Generally, a 30% down payment is made via T/T after confirming the Proforma Invoice (PI), with the balance paid after inspection and before shipment. We accept telegraphic transfers and sight letters of credit.
Q: When can I get the price?
A: We typically quote within 24 hours of receiving your inquiry.
Q: Which shipping methods can you provide?
A: We offer shipping by sea, air, and express.
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