Tank Evaporation loss (for fixed roof tank)¿Í °ü·ÃÇÏ¿©
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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
1. 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)
2. Working Loss : F = Kc ¡¿ (3PV/1000) ¡¿ Kt
F : Working Loss, in barrels
V : Volume of Liquid Pump into tank, in barrels
Kc : Adjustment factor (0.75 for crude oil)
Kt : Turnover factor, Kt=1.0 for 36 per year or less
P : True vapor pressure, Psia
1¹ø brathing loss ½Ä¿¡¼ H : Average Ourtage °¡ ¾î¶² ÀǹÌÀÎÁö¿ä ;;
2¹ø Working loss ½Ä¿¡¼ Kt °ª »êÁ¤¿¡ ÀÖ¾î¼,, TurnoverÀÇ °³³äÀÌ ¾î¶² °ÍÀÎÁö ±Ã±ÝÇÕ´Ï´Ù.
Tank ¿ë·®ÀÌ 100 KLÂ¥¸®¶ó°í Çϸé 1³â¿¡ 1000 KLÀ» »ý»êÇÏ¿´À¸¸é Kt = 10 ÀÌ µÇ´Â°Ç°¡¿ä ?.
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