API bulletin 2523 (÷ºÎ¹°) ÂüÁ¶ÇÏ¿© ¾Æ·¡ ½ÄÀ» ÀÌ¿ëÇÏ·Á°í ÇÕ´Ï´Ù.
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Tank Evaporation loss = Breathing loss + Working loss
Breathing loss : ¿Âµµ¿¡ µû¸¥ ¿Àû ÆØâ ¹× ¾ÐÃàÀ¸·Î ÀÎÇÑ Loss
Working Loss : Tank ³» Level Â÷ÀÌ·Î ÀÎÇÑ Loss
½Ä : Breathing loss : Ly = Kc ¡¿ (24/1000) ¡¿ (P/(14.7-P)^0.68¡¿D^1.73¡¿H^0.51¡¿T^0.50¡¿ Fp ¡¿ C
Ly : Breathing Loss, in barrels per year
H : Average Ourtage, ft (Approximately 1/3¡¿Height)
Kc : Adjustment Factor (0.58 for crude oil)
T : Average daily temperature change , ¢µ
P : True Vapor Pressure, psia
Fp : Paint factor, for light gray = 1.33 , white = 1.00
D : Tank Diameter, ft
C : Adjustment factor for small Diameter tank (In D > 30 ft, C = 1)
ÀÌ ½ÄÀ» ¾²°íÀÚ Çϴµ¥ À§ ½ÄÀÇ °æ¿ì V(True Vapor Pressure)°¡ 14.7psia ÀÌ»óÀÎ °æ¿ì¿¡´Â °è»êÀÌ ºÒ°¡´ÉÇѵ¥
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