The density of water at different temperatures
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In our methanol synthesis process, the flow rate of boiler water in the drum is 34 M3/H at a temperature of 150°C, while the amount of steam generated is 29,000 KG/H. There is a significant difference of around 5 tons between these two values. Could someone please explain why this is the case? Is the density of the boiler water not 1000 KG/M3?
0℃…………0.9998 5℃………….0.9999 10℃…………0.9994 15℃…………0.9988 20℃…………0.9980 25℃…………0.9968 30℃…………0.9955 35℃…………0.9939 40℃…………0.9922 45℃…………0.9902 50℃…………0.9880 55℃…………0.9857 60℃…………0.9833 65℃…………0.9806 70℃…………0.9779 75℃…………0.9749 80℃…………0.9719 85℃…………0.9687 90℃…………0.9654 95℃…………0.9620 100℃………..0.9584 105℃………..0.9548 110℃………. 0.9510 115℃………..0.9471 120℃………..0.9431 125℃………..0.9390 130℃……….0.9348 Since the variation is not regular, it cannot be expressed using a mathematical equation. The relevant data can be found in the Steam Table.
1. Due to density reasons, the density can be determined only once the pressure value is known； 2. Measurement issues
At 150 degrees Celsius, the density of water is 917 Kg/m3
There are density reasons. Another reason is that the steam contains water. It is caused by these two reasons together.
The density of the water in the boiler does not change much; it is probably mainly a problem with the measurement of steam mass.
According to what was said on the 4th floor, the calculated water volume for the boiler should be 33,014 KG/H; so there is still a difference of 4 tons! Moreover, I don’t see much change in the density of water. Could the friend on the 6th floor explain in detail what the issue is with measuring steam mass?
The pressure should be at one standard atmosphere, right?