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Storage Tanks: Heating and Cooling System Design

By Apurba Lal Das and Siddhartha Mukherjee, Air Liquide Global E&C Solutions India Pvt. |

Various heating or cooling options are described here, along with the factors and design parameters that need to be considered. A sample calculation regarding coils is included Tanks constitute important equipment in the chemical process industries (CPI). Various types of liquids are stored in tanks and often these liquids are difficult to handle due to their high viscosities. Generally, increasing the temperature lowers the viscosity, resulting in ease of pumping. Therefore, temperatures inside tanks sometimes need to be maintained at elevated levels. In some cases, low temperatures must be maintained in order to avoid polymerization, undesired reactions or product degradation. In a nutshell, temperature control inside tanks may be required. Designing a tank heating or cooling system involves two basic steps. The first step is to determine the heat loss from the tank to the surroundings (for hot liquids) or the heat gain by the tank (for cold liquids). The second is to design the system to compensate for the heat loss or gain. The purpose of this article is to provide an overview of the design procedure for tank heating and cooling systems for any given service to achieve the previously described objectives.   Types of heating…
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