Revolutionary NH3/CO2 Cascade Refrigeration System
1. Principles of the NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system ingeniously integrates two distinct stages: a high-temperature stage utilizing ammonia (NH3) as the refrigerant and a low-temperature stage employing carbon dioxide (CO2). Through an innovative condensation evaporator, the evaporated NH3 in the high-temperature stage effectively condenses the CO2 gas from the low-temperature stage. This condensation evaporator functions dually as the condenser for the low-temperature stage and the evaporator for the high-temperature stage, thus seamlessly linking both stages.
The system transfers the heat load to the CO2 refrigerant via the end evaporator. The absorbed heat is then conveyed to the high-temperature NH3 refrigerant through the condensing evaporator, which subsequently releases the heat to the environment using a cooling medium. After condensation, CO2 enters the CO2 reservoir, then flows through a dryer filter and throttle valve into the CO2 gas-liquid separator. The CO2 circulation pump channels the liquid CO2 to the evaporator. Post-evaporation, the two-phase CO2 returns to the separator. The gaseous CO2 is compressed by the compressor and re-enters the condensing evaporator, perpetuating the cascade refrigeration cycle.
In this advanced NH3/CO2 cascade system, each temperature stage operates as an independent refrigeration system using a single refrigerant. The high-temperature NH3 system, similar to traditional setups, comprises a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 system includes a CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
The CO2 gas-liquid separator serves a crucial role by separating CO2 gas droplets from the evaporator, preventing compressor wet strokes. It maintains a stable liquid level during pump operation and stores pipeline liquid return when the pump halts. If used as a CO2 reservoir, its capacity should accommodate all system CO2 liquid. Equipped with an auxiliary evaporator on top, it effectively prevents excessive CO2 pressure post-shutdown. The NH3/CO2 cascade system's condensing evaporator facilitates dual functionality, ensuring efficient heat absorption and CO2 liquefaction.
2. Remarkable Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Enhanced NH3 Safety Measures:
(1.(1)) The NH3/CO2 cascade system significantly lowers NH3 condensing pressure, reducing the refrigerant charge to about 1/10th of that in traditional systems.
(1.(2)) NH3 is confined to secured areas like machine and equipment rooms, analogous to a 'tiger in a cage,' monitored by skilled personnel.
(1.(3)) Utilizes NH3's superior heat transfer properties in high-temperature regions to efficiently cool CO2.
(2) The CO2 medium ensures safety in high-occupancy operational areas (e.g., single-freezing machines) and warehouses, safeguarding personnel and assets.
d870837b
| 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. Established in 2011 and nestled in the picturesque coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is a pioneering force in the realm of industrial and commercial freezing and cold storage. We are dedicated to the research, development, design, manufacturing, and sales of top-tier refrigeration systems and equipment, standing as a beacon of high-tech innovation.
Since our inception, we have unwaveringly embraced 'science and technology' as our guiding star and 'management' as our cornerstone, with the aim of satisfying market demands and providing impeccable customer service. Our mission is to deliver comprehensive and flawless refrigeration system solutions, products, and services to our valued customers.
With an impressive portfolio of over ten national technology patents, our company is committed to the perpetual advancement of high-efficiency, energy-saving, and environmentally friendly refrigeration systems. Our product range includes high-efficiency refrigeration units, energy-saving barrel pumps, and PLC intelligent program control boxes, among others.
We specialize in the program design and equipment customization for a wide array of projects, including food quick-freezing storage, food cold storage, ultra-low temperature cold storage, medicine storage, fruit and vegetable air-conditioning storage, workshop air conditioning, quick-freezing and freeze-drying, and thawing devices.
BINGYAN IS PASSIONATE ABOUT DELIVERING SCIENTIFIC AND INNOVATIVE REFRIGERATION SYSTEM SOLUTIONS, ALONG WITH PREMIER ENGINEERING AND EXCEPTIONAL AFTER-SALES SERVICES.
Bingyan offers a full spectrum of services encompassing sales, design, construction, and after-sales support.
1. Our sales department keenly understands and captures customer requirements, ensuring precise communication of client intentions, and maintains seamless, ongoing dialogue with customers.
2. The design department furnishes clients with expert engineering advice and crafts tailored, reliable, and stable refrigeration plans according to specific customer needs.
3. The engineering department approaches each construction phase with meticulous attention, striving for perfection to deliver top-tier projects.
4. Our after-sales department remains ever-ready and vigilant to guarantee customer satisfaction and success.
Question:What sets your company apart from the competition?
Answer:Our professional designers tailor solutions to your specific needs, selecting the most suitable refrigeration equipment for optimal performance. This results in highly efficient cooling, significant energy savings, and reduced power consumption.
Question: How strong is your company?
Answer: Established in 2011, our company boasts a professional cold storage design team, a skilled installation crew, and experienced after-sales maintenance staff. We offer comprehensive services, including cold storage design, installation guidance, and robust after-sales maintenance.
Question:Where are you located? Can I visit your facility?
Answer: Absolutely! We welcome you to visit our factory at your convenience.
Question:What is your usual delivery timeframe?
Answer: We typically deliver within 60 days after confirming your requirements.
Question:What payment methods do you support?
Answer: Generally, we require a 30% down payment via T/T upon confirming the Proforma Invoice (PI), with the balance to be paid after inspection and before shipment. We accept telegraphic transfer and sight letter of credit.
Question: When can I expect to receive a quotation?
Answer: We usually provide a quotation within 24 hours of receiving your inquiry.
Question: What shipping methods are available?
Answer: We offer shipping by sea, air, and express delivery services.
){kind=link}