Ch 2. Pure Substances Multimedia Engineering Thermodynamics Phase PropertyDiagrams PropertyTables IdealGas
 Chapter 1. Basics 2. Pure Substances 3. First Law 4. Energy Analysis 5. Second Law 6. Entropy 7. Exergy Analysis 8. Gas Power Cyc 9. Brayton Cycle 10. Rankine Cycle Appendix Basic Math Units Thermo Tables eBooks Dynamics Fluids Math Mechanics Statics Thermodynamics Author(s): Meirong Huang Kurt Gramoll ©Kurt Gramoll

 THERMODYNAMICS - CASE STUDY Introduction Saturated Water in A Piston- cylinder A mechanical engineering student gets an internship in a power plant. His first task is to design a piston-cylinder device which is used to vaporize the saturated water to saturated vapor under a given pressure. The volume of the device and how much heat needed for the vaporization process are the first thing he has to figure out. What is known: The mass of water m = 10.0 kg Operation pressure P = 100.0 kPa Questions What is the volume change from liquid water to vapor How much heat is added for the vaporization process Approach Latent heat of vaporization (LV) of water under 100 kPa is 2257.0 kJ/kg. Specific volume (Will be introduced in next section) of saturated water (vf) under 100 kPa is 0.001 m3/kg. Specific volume of saturated vapor (vg) under 100 kPa is 1.673 m3/kg.