ã€China Aluminum Industry Network】Aluminum pipe, mainly used in the refrigeration system of cold storage from 10°C to -45°C, is an ideal evaporator for all kinds of food freezing and cold storage. Aluminum tube heat transfer coefficient -40 °C ~ 0 °C evaporation temperature K ≈ 9 ~ 14w/m2 ~ °C, steel tube heat transfer coefficient -40 °C ~ 0 °C evaporation temperature K ≈ 8 ~ 13w/m2 °C , For this same cold storage (under the same load), the aluminum piping has a smaller evaporation area than the steel piping. In addition, from the cost of aluminum materials and advanced die-casting technology, the overall cost per unit area of ​​aluminum pipe is higher than that of steel pipe but the performance of aluminum pipe is much higher than that of steel pipe. The overall cost-effective aluminum pipe is superior to the steel pipe.
Aluminum tube superiority:
1. The projected area and evaporating area ratio of the well-set and high-efficiency aluminum tube can be one to three or one to four, so that the aluminum row is installed on the top surface of the cold storage, so that the heat transfer capacity per unit area is better than that of the wall row. The efficiency is high, the top row has a certain cold storage effect, the frequent start-up rate of the compressor is reduced, and the power consumption is saved.
2. Less food and less consumption of aluminum The aluminum row is installed at the top of the warehouse to form direct-cooled natural convection. The fluctuation of the temperature of the warehouse is low, so that the food loss is reduced to a low level, the frost is less, and the frost layer is less like a snowflake. The defrosting cycle is prolonged. Mechanical defrost, convenient and energy-saving. 3, light weight, easy installation The same evaporation area, aluminum row weight is one-sixth of the steel row, easy installation, reduce support costs.
4, high heat transfer efficiency, energy saving effect of aluminum alloy has a good thermal conductivity, thermal conductivity of aluminum is 2.9 times that of iron. Energy-saving aluminum exhaust heat transfer coefficient is 1.43 times that of steel bars, only the top tube can meet the cooling requirements, energy-saving 30%, comprehensive cost-effective!
5. The system is clean and prolongs the service life of the compressor. The aluminum exhaust pipe is specially treated to ensure the internal cleanliness of the exhaust pipe. The aluminum alloy with strong corrosion resistance is used. The surface is treated with a special process and has a long service life. It meets food hygiene standards.
6, the amount of system refrigerant is less Aluminium row structure is reasonable, there are internal ribs to increase the contact area of ​​the refrigerant, the external fins increase contact with air, greatly improve the refrigerant utilization.
7. The structure is reasonable, accelerating convection, and the rapid refrigerating air foil tubes are connected in parallel to form a number of parallel convection channels. During the operation of the refrigeration system, the cold air forms a “flue effect†in the channels, and the cold air accelerates and sinks, and convection accelerates. The cooling rate is accelerating.
In summary, the application of aluminum pipe in cold storage responds to the call for energy saving and environmental protection. From a long-term point of view, its performance is also greatly superior to other materials and will continue to be the mainstream of the cold storage market for a long time to come.
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KF, ISO Centering Rings Aluminum, Stainless Steel Centering Rings Specification:
â–ª Standard: KF, ISO
â–ª Material: Stainless Steel 304 (1.4301), Stainless Steel 316L(1.4404), Aluminum, etc
â–ª Sealing Material: rubber/ elastomeric o-ring mounted in a centering ring
â–ª Size Range: KF16-KF50, ISO63-ISO500
▪ Temp.:between ~0° C and 120-180° C
â–ª Pressure: from atmosphere to ~10-8 Torr or mbar.
Quality & Inspection:
â–ª PMI test to verify material grade
â–ª Dimension controlling during fabricating and finished
â–ª Visual and surface 100% examination before shipment
â–ª Packed in carton box firstly, then in wooden case
Vacuum Centering Rings,KF Centering Rings, ISO Centering Rings Aluminum,Stainless Steel Centering Rings
Kaysen Steel Industry Co., Ltd. , https://www.chinasanitaryvalve.com