NH3/CO2 Cascade Refrigeration System
1. NH3/CO2: The Principle of Cascade Refrigeration System
NH3/CO2: The cascade refrigeration system is an innovative design comprising two vital stages: the high-temperature stage, employing NH3 as the refrigerant, and the low-temperature stage, utilizing CO2. In this system, NH3 evaporates at the high-temperature level, effectively condensing the CO2 gas from the low-temperature level. This synergy is achieved through a condensation evaporator, which serves the dual role of condensing CO2 from the low-temperature level and evaporating NH3 from the high-temperature level, creating a seamless heat transfer between the two stages.
The heat load is meticulously transferred to the CO2 refrigerant through the end evaporator. The CO2 refrigerant, after absorbing heat, transfers it to the high-temperature NH3 refrigerant via the condensing evaporator. The high-temperature NH3 refrigerant then expels this heat to the high-temperature condenser and ultimately releases it to the surrounding environment through the cooling medium. Condensed CO2 in the condensing evaporator flows into the CO2 reservoir, proceeding through a dryer filter and throttle valve into the CO2 gas-liquid separator. The liquid CO2 is directed to the CO2 evaporator by the CO2 circulation pump. Post-evaporation, the two-phase CO2 returns to the gas-liquid separator, where the gaseous CO2 is compressed into the condensing evaporator by the compressor, perpetuating the cycle of efficient cascade refrigeration.
NH3/CO2: Within the cascade refrigeration system, distinct high and low-temperature stages utilize single refrigerants. The high-temperature NH3 system mirrors conventional refrigeration setups, including a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device. The low-temperature CO2 system, alongside the CO2 compressor, integrates a condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel, epitomizing comprehensive and advanced refrigeration technology.
The CO2 Gas-Liquid Separator is integral to the CO2 compression refrigeration system, ensuring separation of CO2 gas droplets from the evaporator to prevent compressor wet stroke, stabilize pump operation, and store returning pipeline liquid when the pump halts. When inactive, the separator doubles as a CO2 reservoir, accommodating the system's entire CO2 liquid volume. An auxiliary evaporator atop the separator mitigates 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, efficiently managing heat transfer and condensation processes.
2. Advantages of NH3/CO2 Cascade Refrigeration System.
(1) Enhanced Safety and Efficiency with Reduced NH3:
(1.(1)) The NH3/CO2 cascade system significantly lowers NH3 condensing pressure, reducing the NH3 charge to about 1/10th of traditional ammonia systems.
(1.(2)) NH3 is confined to the engine room, akin to a 'tiger in a cage,' overseen by professional technical personnel, ensuring heightened safety.
(1.(3)) Optimal utilization of NH3 in the high-temperature region leverages its superior heat transfer properties to effectively cool CO2.
(2) Using CO2 as the medium in personnel-dense operation rooms (such as single-freezing machines) and warehouses ensures the safety of both personnel and property.
303f1d82
| 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 high-tech enterprise that seamlessly integrates the research, design, manufacturing, and sales of industrial and commercial freezing, cold storage, and comprehensive refrigeration systems.
Since its inception, the company has steadfastly adhered to the principle of 'science and technology' as its guiding beacon, and 'management' as its cornerstone. Our mission is to meet market demands and exceed customer expectations by providing flawless refrigeration system solutions, top-tier products, and exceptional services.
Boasting over ten national technology patents, Qingdao Bingyan is dedicated to the perennial pursuit of developing high-efficiency, energy-saving, and environmentally friendly refrigeration systems. Our innovative offerings include high-efficiency refrigeration units, energy-saving barrel pumps, and advanced PLC intelligent program control boxes, among others.
Our expertise primarily lies in the program design and bespoke equipment customization for a diverse 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.
BINGYAN IS DEDICATED TO DELIVERING CUSTOMERS CUTTING-EDGE, SCIENTIFICALLY BACKED REFRIGERATION SYSTEM SOLUTIONS, COUPLED WITH TOP-TIER ENGINEERING AND UNPARALLELED AFTER-SALES SERVICES.
Bingyan offers a full spectrum of services encompassing sales, bespoke design, meticulous construction, and reliable after-sales support.
1. The sales department excels at accurately discerning and fulfilling customer requirements, ensuring their intentions are clearly conveyed and maintaining seamless, continuous communication.
2. The design department delivers expert, well-founded engineering recommendations, crafting tailored refrigeration plans that are both dependable and robust, perfectly aligned with customer needs.
3. The engineering department approaches each construction phase with utmost precision and dedication, meticulously completing every task to achieve outstanding, high-caliber projects.
4. The after-sales department stands ever-vigilant and ready, dedicated to guaranteeing our customers' continuous success.
Question:What sets your company apart?
Answer: Our professional design team customizes refrigeration solutions tailored to your specific needs. We meticulously select the most suitable refrigeration equipment to achieve optimal cooling efficiency while ensuring energy and power savings.
Q: How robust is your company?
A: Established in 2011, our company boasts a seasoned cold storage design and installation team, along with experienced after-sales maintenance personnel. We offer comprehensive services including design, installation guidance, and after-sales support.
Q:Where are you located? Can I visit your facility?
A: Absolutely, you are welcome to visit our factory at any time.
Q:What is your delivery timeline?
A: We typically deliver within 60 days after confirming your requirements.
Q:What payment methods do you accept?
A: We usually require a 30% down payment via T/T upon confirming the Proforma Invoice (PI), with the balance due after inspection and before shipment. We accept telegraphic transfers and sight letters of credit.
Q: When will I receive a price quote?
A: We typically provide a quote within 24 hours of receiving your inquiry.
Q: What shipping options do you offer?
A: We can arrange shipping by sea, by air, or by express courier.
){kind=link}