NH3/CO2 Cascade Refrigeration System
1. Principle of NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously designed in two stages: high-temperature and low-temperature. The high-temperature stage employs NH3 as the refrigerant, while the low-temperature stage utilizes CO2. In this innovative system, the evaporation of NH3 in the high-temperature stage efficiently condenses the CO2 gas discharged from the low-temperature stage. A condensation evaporator seamlessly links the two parts, functioning as the condenser for the low-temperature stage and the evaporator for the high-temperature stage.
In this state-of-the-art setup, the heat load is transferred to the CO2 refrigerant via the end evaporator. The absorbed heat by CO2 is then channeled to the high-temperature NH3 refrigerant through the condensing evaporator. Subsequently, the high-temperature NH3 transfers the heat to the high-temperature condenser, releasing it into the environment via a cooling medium. The condensed CO2 enters the CO2 reservoir, then progresses through a dryer filter and throttle valve into the CO2 gas-liquid separator. The liquid CO2 is propelled to the evaporator by the CO2 circulation pump. After the evaporator, two-phase CO2 returns to the gas-liquid separator, where the gaseous CO2 is compressed by the compressor and re-enters the condensing evaporator, perpetuating the cycle to complete the cascade refrigeration process.
In the NH3/CO2 cascade refrigeration system, the high and low-temperature stages operate as independent refrigeration systems using single refrigerants. The high-temperature NH3 refrigeration system mirrors conventional systems, comprising a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 refrigeration system, apart from the CO2 compressor, includes a condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel.
The CO2 gas-liquid separator plays a crucial role in the CO2 compression refrigeration system. It separates CO2 gas droplets from the evaporator, preventing compressor wet stroke, maintaining stable liquid levels during pump operation, and storing return liquid when the pump is idle. If used as a CO2 reservoir when idle, its volume must accommodate all CO2 liquid in the system. An auxiliary evaporator is fitted on top to prevent high-pressure issues post-shutdown. In the NH3/CO2 cascade system, the condensing evaporator serves dual purposes: evaporator on the NH3 side and condenser on the CO2 side, where the compound liquid evaporates, absorbing heat, while CO2 gas condenses into liquid.
2. Advantages of NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety with Reduced NH3 Factors:
(1.(1)) The NH3/CO2 cascade system significantly lowers the NH3 refrigerant charge condensing pressure, approximately 1/10 of traditional ammonia systems;
(1.(2)) NH3 is restricted to the machine room, akin to a 'tiger' in a 'cage,' safeguarded by skilled personnel;
(1.(3)) Optimizes NH3's excellent heat transfer properties in high-temperature regions to cool CO2.
(2) Utilizes CO2 in personnel-intensive areas (e.g., single-freezing machines, warehouses) to ensure safety for both personnel and property.
5250f925
| 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. stands as a beacon of innovation in the realm of industrial and commercial freezing and cold storage. We specialize in the research, development, design, manufacturing, and sales of top-tier refrigeration systems and equipment, making us a leading high-tech enterprise in the industry.
Since our inception, we have been steadfastly guided by the principles of 'science and technology' and anchored in robust 'management' practices. Our mission is to meet market demands and exceed customer expectations by delivering impeccable refrigeration system solutions, products, and services.
With over ten national technology patents to our name, we are devoted to the perpetual research and development of high-efficiency, energy-saving, and environmentally friendly refrigeration systems. Our portfolio includes high-efficiency refrigeration units, energy-saving barrel pumps, and intelligent PLC program control boxes, all designed to deliver superior performance.
Our expertise extends to the program design and equipment customization for a diverse range 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 dedicated to delivering scientifically proven and meticulously crafted refrigeration system solutions. We pride ourselves on providing top-notch engineering and exceptional after-sales services to ensure our customers' utmost satisfaction.
Bingyan offers an all-encompassing suite of services, from sales and design to construction and after-sales support, ensuring a seamless experience for our clients.
1. Our sales department is adept at thoroughly understanding and precisely capturing customer needs. We ensure clear communication and maintain a strong rapport with our clients to convey their intentions accurately.
2. The design department offers expert and practical engineering advice, crafting customized and reliable refrigeration plans that are tailored to meet specific customer requirements.
3. Our engineering department approaches every construction phase with precision and dedication, meticulously completing each task to achieve outstanding project quality.
4. Our after-sales department stands ever-ready to provide prompt support, ensuring the ongoing success and satisfaction of our customers.
Question:What sets your company apart from the competition?
Answer: Our team of professional designers tailors solutions to meet your specific needs, selecting the most appropriate refrigeration equipment to ensure optimal cooling efficiency. This meticulous process ultimately saves energy and reduces power consumption.
Q: How robust is your company?
A: Established in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. boasts a specialized cold storage design team, skilled installation crew, and experienced after-sales service personnel. We offer comprehensive cold storage design, installation guidance, and maintenance services.
Q:Where are you located, and can I visit your factory?
A: Absolutely, we welcome you to visit our factory at any time.
Q:What is your typical delivery time?
A: Delivery is typically within 60 days after we confirm your requirements.
Q:What payment methods does your company accept?
A: We generally require a 30% down payment via T/T after confirming the Proforma Invoice (PI), with the balance due upon inspection and before shipment. We accept telegraphic transfers and sight letters of credit.
Q: How quickly can I receive a price quote?
A: We usually provide a quote within 24 hours of receiving your inquiry.
Q: What shipping methods are available?
A: We offer shipping by sea, air, and express.
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