NH3/CO2 Cascade Refrigeration System
1. Principle of NH3/CO2 Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system is ingeniously divided into two principal stages: high temperature and low temperature. In the high-temperature stage, ammonia (NH3) serves as the refrigerant, while in the low-temperature stage, carbon dioxide (CO2) takes charge. The high-temperature NH3 evaporates, facilitating the condensation of CO2 discharged from the low-temperature stage. An innovative condensation evaporator interconnects the high and low temperature levels, functioning as both the condenser for the low-temperature cycle and the evaporator for the high-temperature cycle.
Heat from the cold storage is effectively transferred to the CO2 refrigerant through the end evaporator. The absorbed heat by CO2 is then relayed to the high-temperature NH3 refrigerant via the condensing evaporator. This high-temperature NH3 transfers the heat to the high-temperature condenser, ultimately releasing it to the environment through a cooling medium. Post-condensation, CO2 enters the CO2 reservoir and later traverses the CO2 gas-liquid separator via a dryer filter and throttle valve. Liquid CO2 is propelled to the CO2 evaporator by a CO2 circulation pump. After evaporation, two-phase CO2 returns to the gas-liquid separator, where gaseous CO2 is compressed into the condensing evaporator, seamlessly continuing the refrigeration cycle.
In the NH3/CO2 cascade refrigeration system, both the high and low-temperature stages employ single refrigerants. The high-temperature NH3 refrigeration system mirrors a conventional setup, comprising a refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttle device. The low-temperature CO2 refrigeration system, aside from the CO2 compressor, includes a condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttle device, evaporator, and expansion vessel.
The CO2 gas-liquid separator plays a critical role in segregating CO2 gas droplets from the evaporator in the CO2 compression refrigeration system. This prevents wet strokes in the compressor, maintains a stable liquid level during pump operation, and stores liquid when the pump halts. When used as a CO2 reservoir during non-operation, its volume should accommodate all the CO2 liquid in the system. Additionally, an auxiliary evaporator atop the gas-liquid separator prevents excessive CO2 pressure post-shutdown. The condensing evaporator in the NH3/CO2 cascade system serves as both an NH3 evaporator and a CO2 condenser, where compound liquid evaporates and absorbs heat, and CO2 gas condenses into liquid.
2. Advantages of the NH3/CO2 Cascade Refrigeration System
(1) Enhanced Safety and Efficiency with NH3:
(1.(1)) The NH3/CO2 cascade system significantly reduces the condensing pressure and the NH3 charge, to about 1/10th of traditional ammonia systems;
(1.(2)) NH3 is confined to the machine and equipment rooms, akin to a 'tiger' securely caged and managed by skilled personnel;
(1.(3)) This setup fully exploits NH3's excellent heat transfer properties in high-temperature regions to cool CO2.
(2) CO2 as a Safe Medium: CO2, serving as the refrigerant in personnel-dense areas like single-freezing machines and warehouses, ensures the safety of both personnel and property.
88d1dc23
| 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 that integrates industrial and commercial freezing, cold storage, and advanced refrigeration systems. We excel in research and development, design, manufacturing, and sales of cutting-edge refrigeration equipment.
Since our inception, we have championed 'science and technology' as our compass and 'management' as our assurance, dedicated to meeting market demands and delivering exceptional customer service. Our primary goal is to provide comprehensive refrigeration system solutions, outstanding products, and unparalleled services to our valued customers.
Proud holders of over ten national technology patents, our company is devoted to the continuous innovation of high-efficiency, energy-saving, and eco-friendly refrigeration systems. Our product lineup includes high-performance refrigeration units, energy-saving barrel pumps, and PLC intelligent program control boxes, among others.
Our expertise extends to tailored program designs and equipment customizations for a variety of applications. These include 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 solutions, and thawing devices.
BINGYAN IS DEDICATED TO DELIVERING CUTTING-EDGE, SCIENTIFICALLY-BACKED REFRIGERATION SYSTEM SOLUTIONS, ALONG WITH EXEMPLARY ENGINEERING AND SUPERIOR AFTER-SALES SUPPORT.
Bingyan offers a holistic suite of services encompassing sales, design, construction, and after-sales support.
1. Our sales department is adept at discerning and understanding customer needs, ensuring precise communication of client intentions, and maintaining robust, continuous engagement with our clients.
2. The design department delivers expert and well-founded engineering recommendations, crafting tailored, reliable, and stable refrigeration plans according to specific customer requirements.
3. Our engineering department approaches each construction phase with meticulous attention to detail, striving for excellence and delivering high-caliber projects.
4. The after-sales department remains perpetually prepared and on standby, ensuring the ongoing success and satisfaction of our customers.
Question:What sets your company apart from the competition?
Answer:Our professional designers cater to your specific needs, crafting tailored refrigeration solutions with precision. By selecting the most suitable equipment, we ensure superior cooling efficiency, remarkable energy conservation, and substantial power savings.
Question: How robust is your company's infrastructure?
Answer: Since our inception in 2011, we have established a dedicated team specializing in cold storage design, installation, and maintenance. Our experts deliver comprehensive services, from intricate design and seamless installation to reliable after-sales support.
Question:Where is your company located? Can I visit your facilities?
Answer: Absolutely, we warmly welcome you to visit our factory at your convenience.
Question:What is the typical delivery time for your products?
Answer: Delivery is typically within 60 days after your requirements are confirmed.
Question:What payment methods does your company accept?
Answer: Generally, we require a 30% down payment via T/T upon PI confirmation, with the balance due post-inspection and prior to shipment. We accept telegraphic transfers and sight letters of credit.
Question: How soon can I receive a quote?
Answer: We typically provide a quote within 24 hours of receiving your inquiry.
Question: What shipping options are available?
Answer: We offer a variety of shipping methods, including sea freight, air transport, and express delivery.
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