Heating calculation
Thread Content
How many tons of water can be heated to 100°C using 8.5 tons of steam (at 305°C and 1.25 MPa gauge pressure) to heat water at 10°C? (Mixed heating; steam also turns into water)
8.5 tons of steam (at 305°C and 1.25 MPa gauge pressure) is introduced into water at 10°C; when the water temperature reaches 100°C, the total amount of hot water is 66.26 tons (including the water resulting from steam condensation)
Calculated using Aspen HYSYS v7.2 software
Firstly, for steam at 305°C, the gauge pressure is not 1.25 MPa but rather 9.128 MPa. Secondly, you haven’t provided the pressure after mixing. I calculated based on the resulting pressure of 9.128 MPa: the exact amount of water that needs to be heated is 52,960 kg, to raise its temperature from 10°C to 100°C.
Superheated steam at a gauge pressure of 1.25 MPa can reach 305°C, but it’s unclear what process could produce such steam Because ordinary boilers are not designed this way. Furthermore, the pressure after mixing cannot be calculated accurately; only an approximate value can be obtained.
The boiler has a superheating section; you can use 605 as well—that’s superheated steam.