Calculation of expansion pressure in a closed container filled with liquid
Thread Content
How to calculate how the pressure in a sealed container filled with liquid changes as the temperature varies? An increase of ten degrees will raise the pressure by dozens or hundreds of kilograms?
Why calculate this? By default, it’s fine as long as it breaks when fully charged and heated. Based on the density at different temperatures, calculate the allowable maximum filling level to avoid overfilling
Many formula calculations cannot be displayed; by looking at this example, you will be able to carry out the calculations:
You can refer to the discussion thread on related topics at https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=2914028
Liquid-solid coupling: Liquids expand when heated and contract when compressed; solids elongate under compression and expand when heated. By solving these equations together, the answer can be determined
Expert, what is the title of this book on the page you took a photo of? Thanks, ha
It depends on what kind of liquid it is and what the temperature is. As the temperature rises, the internal pressure increases; there are basically two scenarios: 1. As the temperature goes up, the volume of the liquid itself expands; 2. As the temperature rises, the saturated vapor pressure of the liquid changes, resulting in more gaseous substances being produced, which increases the volume and thus raises the internal pressure. For the first scenario, this can be determined by looking at the curve showing how the liquid’s density changes with temperature. For the second scenario, it is necessary to examine the curve showing how the substance’s saturated vapor pressure changes with temperature in order to make the calculations. Note that if it is a mixture, it is required to determine these properties separately for each component and make the necessary corrections in the calculations.