d would be controlled as smaller Рthan the volume calculated. However, if the volume to be tested is more than Рthe claculated, personnel other than those involved in the testing should be Рrestricted to enter the limited access area during the pneumatic testing Рfor safety and hazard. Р Р2. Stored Energy Calculation Р Р: The internal energy of the contained test medium shall be calculated Рby the following equation : Р Р25,000,000 ft-lbs > E = k/(k-1) X P1 X V X [ 1-(P0/P1)^(k-1)/k ] X 144 Р РWhere : Р РE = Internal Energy (ft-lbs) РP1 = Test gage pressure + 14.7 (psia) РP0 = 14.7 psia РV = Total volume of system (cubic feet) Рk = 1.4, Isentropic ratio of specific heat (for air and nitrogen) Р Рthe calculation is based on adiabatic flow expansion process of a perfect gas. Р Р3. Input Data
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