NH3/CO2 cascade refrigeration system
1. NH3/CO2: The Principle of the Cascade Refrigeration System
The NH3/CO2 cascade refrigeration system, an exemplary fusion of engineering brilliance, consists of two meticulously interconnected parts: a high-temperature stage and a low-temperature stage. At the high-temperature tier, NH3 serves as the master refrigerant, while CO2 reigns supreme at the low-temperature stage. The ingenious system harnesses the power of NH3 evaporation in the high-temperature level to condense the effervescent CO2 refrigerant gas from the low-temperature level. A condensation evaporator, a marvel of engineering, seamlessly bridges the high and low-temperature stages, functioning dually as the condenser for the low-temperature level and the evaporator of the high-temperature tier.
In this state-of-the-art cascade system, heat load is deftly transferred to the CO2 refrigerant through the terminal evaporator, initiating a sophisticated sequence where CO2 efficiently absorbs heat. This heat then journeys to the high-temperature NH3 refrigerant via the condensing evaporator. The NH3 refrigerant, now a carrier of warmth, transfers and unleashes this heat at the high-temperature condenser, dispersing it into the environment through a cooling medium. As this precise cycle unfolds, the condensed CO2 within the condensing evaporator makes its way to the CO2 reservoir, progressing through the dryer filter and throttle valve to enter the CO2 gas-liquid separator. An orchestrated movement ensues, where liquid CO2 is dispatched to the CO2 evaporator via a circulation pump, setting the stage for the triumphant return of two-phase CO2 to the separator. Gaseous CO2 is then drawn into the compressor, completing this meticulously choreographed cascade refrigeration cycle, ensuring efficiency, safety, and reliability.
Within the NH3/CO2 cascade refrigeration system, both the high and low-temperature levels operate as independent refrigeration systems, each employing a singular, dedicated refrigerant. The system's architectural elegance divides it into two integral sections: the high-temperature NH3 refrigeration system, a paragon of conventional design, encompassing the refrigeration compressor, condenser, liquid storage, gas-liquid separator, and throttling device, and the low-temperature CO2 refrigeration system, a showcase of innovation that includes the CO2 compressor, condensing evaporator, reservoir, gas-liquid separator, filter dryer, pump, throttling device, evaporator, and expansion vessel. Together, these systems work in harmonious synergy, optimizing performance and enhancing reliability.
The In the CO2 compression refrigeration system, the CO2 gas-liquid separator performs the crucial task of separating droplets from the evaporator, preventing the dreaded wet stroke of the compressor. This mechanism also stabilizes the liquid level during pump operation and serves as a storage reservoir for returning equipment and pipeline liquids upon pump cessation. Ingeniously designed, the gas-liquid separator also doubles as a CO2 reservoir when inactive, its volume capable of accommodating the entirety of the system's CO2 liquid. Aided by an auxiliary evaporator atop the separator, this setup effectively averts excessive CO2 pressure post-shutdown. Meanwhile, the NH3/CO2 cascade system's condensing evaporator performs a dual role: it serves as the NH3 side's evaporator and the CO2 side's condenser, with compound liquid evaporating and absorbing heat within the tube, while carbon dioxide gas transitions to its liquid state in the shell.
2. Advantages of NH3/CO2 Cascade Refrigeration System
(1) Reduced NH3 Unsafe Factors:
(1.(1)) The NH3/CO2 cascade refrigeration system significantly diminishes the condensing pressure of the NH3 refrigerant, achieving a dramatic reduction to about 1/10th of the charge found in traditional ammonia refrigeration systems.
(1.(2)) Within this system, NH3 is confined to its rightful domain within the machine and equipment rooms, akin to a 'tiger' safely caged and vigilantly overseen by skilled professionals and technical personnel.
(1.(3)) The system harnesses the excellent heat transfer properties of NH3 in the high-temperature region to efficiently cool CO2, optimizing thermal management.
(2) CO2 enters personnel-intensive operation rooms, such as single-freezing machines, and warehouses, ensuring the utmost safety for both personnel and property in these environments.
b0691842
| 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 |
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Qingdao Bingyan Refrigeration Equipment Co., Ltd. Founded in 2011, Qingdao Bingyan Refrigeration Equipment Co., Ltd. is nestled in the picturesque coastal city of Qingdao. We are a cutting-edge enterprise seamlessly integrating the research and development, design, manufacture, and sales of industrial and commercial freezing, cold storage, and advanced refrigeration systems.
From the very beginning, our company has embraced 'science and technology' as our guiding principle, with 'management' ensuring our steadfast commitment to market demands and unmatched customer service. Our mission is to deliver impeccable refrigeration system solutions, products, and services tailored to our clients' needs.
Boasting over ten national technology patents, we are dedicated to pioneering high-efficiency, energy-saving, and environmentally friendly refrigeration configurations. Our innovations include state-of-the-art refrigeration units, energy-saving barrel pumps, and intelligent PLC program control boxes.
Our expertise lies in designing unique programs and customizing equipment for a broad array of projects. This includes food quick-freezing storage, ultra-low temperature cold storage, pharmaceutical storage solutions, climate-controlled fruit and vegetable storage, workshop air conditioning systems, quick-freezing, freeze-drying technology, and sophisticated thawing devices.
BINGYAN IS DEDICATED TO DELIVERING SCIENTIFICALLY DRIVEN AND LOGICALLY SOUND REFRIGERATION SYSTEM SOLUTIONS, COUPLED WITH TOP-TIER ENGINEERING AND EXEMPLARY AFTER-SALES SERVICES.
Bingyan offers a holistic suite of services encompassing sales, innovative design, meticulous construction, and unparalleled after-sales support.
1. Our sales department possesses a keen ability to precisely discern and respond to customer needs, ensuring that customer intentions are communicated with clarity and that a seamless dialogue with clients is maintained.
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A:Our company was established in 2011 and has a professional cold storage design team, installation team, and experienced after-sales maintenance personnel. We can provide a complete set of cold storage design, installation guidance, and after-sales maintenance services.
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