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There is a vertical fixed-roof storage tank with a capacity of 1500 m3, and the temperature of the material inside it is at room temperature. Since there is no insulation on the outside, the temperature at the top of the tank can reach 60°C in summer, which is quite high; as a result, the tank experiences significant daily breathing losses. Now consider adding insulation. Dear marine friends, how is the thickness of the insulation layer for storage tanks calculated? ? Even after adding insulation, the internal temperature remains at room temperature, unaffected by external temperatures.
Personally, I think the external ambient temperature can be taken as 60 degrees Celsius, and the thickness can be calculated based on the normal material temperature. Also, note that the breathing volume of the breather valve is relatively large; since the air surrounding the filler is affected by radiation and thus has a higher temperature, it is necessary to raise the height of the breathing opening.
You’re not trying to add insulation here; you’re trying to add a spray cooling system. Use it in summer, and don’t use it in winter!
You’re not trying to add insulation here; you’re trying to add a spray cooling system. Use it in summer, and don’t use it in winter!
In winter, as the temperature changes throughout the day, the breathing valve also expels air during the day. So consider insulation.
Is it to avoid being affected by natural convection heat transfer from the external air? Theoretically, if insulation is not perfect, then an infinite insulation thickness results in zero temperature effect. Adding an insulation layer merely reduces the extent of fluctuations caused by changes in external air temperature; since a temperature difference exists, heat exchange occurs. By calculating the heat exchange through natural air convection, it is possible to determine the thickness of the insulation layer required under allowable temperature difference conditions. Generally, the fluctuations caused by natural convection heat transfer in the air throughout a day have little impact on the liquid. I don’t know what kind of technology is used; is there gas inside? If strict constant temperature is required, a circulating water jacket system is likely to provide better temperature control. What process don’t I understand? What is breathing loss? Is it the loss caused by the safety valve releasing pressure automatically?
Spraying is a common method for cooling oil tanks, but it involves some energy waste and equipment corrosion issues. Adiabatic insulation and sun protection layers can be used. As for the calculation of heat, it can be determined by considering the heat corresponding to the actual loss values as the minimum allowable heat.
1. What is the contents? If the volatility is very low, 60 degrees is fine. 2. Insulation is needed for protection... On one hand, there’s the issue of corrosion caused by moisture in the insulation; on the other hand, it requires additional costs for setting up such insulation. 3. If the volatility is indeed high but the contents are unnecessary, combustion or condensation can be used to handle the exhaust gases. These are my suggestions for your consideration
It is recommended to clearly specify first what process medium is being filled. As mentioned above, factors such as the volatility, flash point, saturated vapor pressure of the material stored at different temperatures, as well as the ambient temperature, all have an impact on the magnitude of breathing. Given that the storage temperature mentioned by the poster is at room temperature, it is likely that the freezing point will not be very high. If its volatility is lower than that of light refined oil, I suggest you consider using thermal insulation adhesives; these are already widely used in the industry for anti-corrosion purposes on spherical tanks, and in practice they provide even better results than external insulation systems
Without hot water for replacement and only with insulation, the temperature can be kept within a certain range; the basic heat conduction formula can be used to calculate this