NH3/CO2 Cascade Refrigeration System
1. The Principle of NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously composed of two stages: the high temperature stage employing NH3 as the refrigerant and the low temperature stage utilizing CO2. In this system, the evaporation of NH3 refrigerant at the high temperature stage condenses the CO2 gas from the low temperature stage. A condensation evaporator seamlessly connects these two stages, serving dually as the condenser for the low temperature stage and the evaporator for the high temperature stage.
Heat is efficiently transferred to the CO2 refrigerant via the end evaporator. The CO2 refrigerant, in turn, delivers the absorbed heat to the high-temperature NH3 refrigerant through the condensing evaporator. The NH3 refrigerant then transfers this heat to the high-temperature condenser, which releases it to the environment through a cooling medium. The condensed CO2 from the condensing evaporator flows into the CO2 reservoir, then passes through the dryer filter and throttle valve to enter the CO2 gas-liquid separator. Using a CO2 circulation pump, the liquid CO2 is sent to the CO2 evaporator. Post-evaporation, the two-phase CO2 returns to the gas-liquid separator, where the gaseous CO2 is compressed by the compressor into the condensing evaporator. This cycle repeats, completing the entire cascade refrigeration cycle.
In the NH3/CO2 cascade refrigeration system, each temperature level is a distinct refrigeration system using a single refrigerant. Thus, the system is divided into two components: the high-temperature NH3 refrigeration system and the low-temperature CO2 refrigeration system. The high-temperature NH3 system includes components such as the refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 system comprises components like the CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
TheCO2 gas-liquid separator performs the crucial role of separating CO2 gas droplets from the evaporator in the CO2 compression refrigeration system. This prevents compressor wet stroke, maintains a stable liquid level during pump operation, and stores liquid return in the pipeline when the pump stops. When the system is not running, the gas-liquid separator acts as a CO2 reservoir with sufficient volume to hold all the liquid CO2. An auxiliary evaporator on top of the gas-liquid separator prevents excessive CO2 pressure post-shutdown. In the NH3/CO2 cascade system, the condensing evaporator functions dually as the NH3 side evaporator and the CO2 side condenser, where compound liquid evaporates and absorbs heat in the tube, while CO2 gas condenses into a liquid in the shell.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Reduced NH3 Safety Risks:
(1.(1)) The NH3/CO2 cascade system significantly lowers NH3 refrigerant charge condensing pressure to about 1/10 of traditional systems;
(1.(2)) NH3 is restricted to the machine room and equipment room, akin to a 'tiger in a cage', managed by skilled personnel;
(1.(3)) It maximizes the excellent heat transfer properties of NH3 in the high-temperature region to cool CO2.
(2) CO2 serves as the refrigerant in personnel-intensive areas (like single-freezing machines) and warehouses, ensuring maximum safety for personnel and property.
ec9916fb
| 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 stunning coastal city of Qingdao, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is a high-tech enterprise that excels in industrial and commercial freezing and cold storage solutions. We specialize in the research, development, design, manufacturing, and sales of cutting-edge refrigeration systems and equipment.
Since our inception, we have been committed to guiding our operations with 'science and technology' while ensuring 'management' serves as a solid foundation. Our primary aim is to meet market demands and exceed customer expectations by delivering impeccable refrigeration system solutions, superior products, and exceptional services.
With over ten national technology patents to our name, we remain steadfast in our dedication to developing high-efficiency, energy-saving, and environmentally friendly refrigeration system configurations. Our innovative offerings include high-efficiency refrigeration units, energy-saving barrel pumps, and PLC intelligent program control boxes.
Our expertise extends to 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 systems, and thawing devices.
BINGYAN IS COMMITTED TO PROVIDING CUSTOMERS WITH SCIENTIFIC AND REASONABLE REFRIGERATION SYSTEM SOLUTIONS, AS WELL AS HIGH-QUALITY ENGINEERING AND AFTER-SALES SERVICES.
Bingyan offers an all-encompassing suite of services including sales, design, construction, and after-sales support.
1. Our sales department deeply comprehends and precisely addresses customer needs, ensuring seamless and clear communication at every stage.
2. The design department delivers expert and tailored engineering advice, crafting reliable and stable refrigeration plans that match customer requirements.
3. Our engineering team meticulously handles every construction phase, aiming for perfection and delivering high-quality projects.
4. The after-sales department is always prepared and on standby to ensure customers' continued success.
Q:What sets your company apart from the competition?
A: Our team of professional designers creates tailored solutions to meet your specific needs, selecting the perfect refrigeration equipment to ensure optimal cooling efficiency, energy conservation, and power savings.
Q: How robust is your company's capability?
A: Established in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. boasts a highly skilled cold storage design team, installation experts, and experienced after-sales maintenance personnel. We deliver comprehensive services including cold storage design, installation guidance, and thorough after-sales support.
Q:Where is your company located? Is it possible to visit your factory?
A: Absolutely! We warmly welcome you to visit our factory at your convenience.
Q:What is your typical delivery time?
A: We strive to deliver within 60 days after finalizing your requirements.
Q:What payment methods are supported by your company?
A: Typically, we require a 30% down payment via T/T upon confirmation of the Proforma Invoice (PI), with the balance due after inspection and prior to shipment. We accept telegraphic transfer and sight letter of credit.
Q: When can I expect to receive a price quote?
A: We usually provide a quote within 24 hours of receiving your inquiry.
Q: What shipping options are available?
A: We offer various shipping methods including sea freight, air freight, and express delivery.
){kind=link}