Unformatted text preview: rk that a pressurized liquid would do if allowed to expand reversibly and adiabatically to the pressure of
the surroundings can be viewed as the explosive energy of the
pressurized liquid. Because of the very short time period of the
explosion and the apparent calm afterward, the explosion
process can be considered to be adiabatic with no changes in
kinetic and potential energies and no mixing with the air. Hot water
2 MPa FIGURE P7–152 cen54261_ch07.qxd 11/18/03 9:58 AM Page 346 346
FUNDAMENTALS OF THERMAL-FLUID SCIENCES Consider a 100-L hot-water tank that has a working pressure of 0.5 MPa. As a result of some malfunction, the pressure
in the tank rises to 2 MPa, at which point the tank explodes.
Taking the atmospheric pressure to be 100 kPa and assuming
the liquid in the tank to be saturated at the time of explosion,
determine the total explosion energy of the tank in terms of
the TNT equivalence. (The explosion energy of TNT is about
3250 kJ/kg, and 5 kg of TNT can cause total destruction of
unreinforced structures within about a 7-m radius.) process, determine (a) the final temper...
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