Property Diagrams for Phase Change Processes of Water

T-v Diagram ?
  

P-v Diagram ?



Comments

Post a Comment

Popular posts from this blog

System ? Surrounding ? Boundary ? ­                          The first thing we should know as process engineer is what is the system ?             So, the system is part of the universe that we will study or we interested to study about it, and the part of universe outside the system is the surrounding . The real or imaginary surface separates the system from the surrounding is the boundary . The boundary of system can be moveable or fixed. (Note : the boundary is the contact surface shared by both the system and the boundary.) The system may be considered closed or isolated or open system. The closed system or control mass consists of fixed amount of mass, and no mass can cross its boundary, but the energy can cross its boundary. Different from closed system, the isolated system is special case that no mass and e...
Read more
Phase Change Processes of Water ? compressed liquid or subcooled liquid ? The meaning of compressed liquid or subcooled liquid is water exists in liquid phase, or it is not about to vaporize . saturated liquid ? If any heat is transferred to water, until it reaches 100oC ( P = 1 atm), at this point water is still in liquid phase, but any heat addition is transferred to ­­­water will cause some of the liquid to vaporize . A liquid that is about to vaporize is called a saturated liquid saturated vapor ? As we continue transferring heat, the vaporization process continues until the last drop of liquid is vaporized. At this point, the entire liquid is turn into vapor. Any heat loss from this vapor will cause some of the vapor to condense . A vapor that is about to condense is called a saturated vapor. saturated mixture ? This condition exists when vaporization proceed, the liquid and vapor phases coexist in equilibrium . superheated vapor ? if ...
Read more
Image
Pressure ? Pressure is defined as a normal force exerted by a fluid per unit area . We speak of pressure when we deal with a fluid or gas . The counterpart of pressure in a solid is normal stress . The actual pressure at spesific point is called absolute pressure , it is measured relative to absolute zero pressure. Unfortunately, most pressure measuring device is calibrated to read zero pressure in atmospheric pressure , so they indicate the difference between the absulte pressure and the atmospheric pressure. The difference is called the gage pressure . The pressure below atmospheric pressure is called vacuum pressure.
Read more