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´Ù¸§ÀÌ ¾Æ´Ï¶ó Á¦°¡ Breather ValveÀÇ Vent·®À» °è»êÇÏ´ÂÁß ¿©·¯°¡Áö ÀڷḦ Âü°í·Î °øºÎ¸¦ Çغþ¹´Ï´Ù.
±×·±µ¥ Calculation Sheet¸¦ ã¾Æ¼ °øºÎ¸¦ Çϴµ¥, ¿©·¯°¡Áö ¸ð¸£´ÂÁ¡ÀÌ ÀÖ¾î¼ ÀÌ·¸°Ô ±ÛÀ» ¿Ã¸³´Ï´Ù.
API2000À» ±âÁØÀ¸·Î ÀÛ¼ºÀ» Çغôµ¥¿ä.
¿ì¼±Àº Normal Venting µÇ´Â ºÎºÐ¸¸ °è»êÀ» ÇغýÀ´Ï´Ù.
»¡°»öÀ¸·Î ¾´±ÛÀº.. Á¦°¡ ¾î´À°É Åä´ë·Î ¾î¶»°Ô Çß´ÂÁö¸¦ ¼³¸íÀ» Çߴµ¥, Ʋ¸°ºÎºÐÀ̶óµçÁö Á¶¾ðÁ»
¾òÀ»¼ö ÀÖÀ»±î Çؼ ÀÌ·¸°Ô ¿Ã¸³´Ï´Ù.
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Venting Atmospheric and Low Pressure Storage Tank(API 2000)
Definition of Terms
SCFH : ft3/hr(15¡É 1atm)
Nm3/hr : 0¡É 1atm
Á¶°Ç
Tank diameter D: 3048m
Tank height H: 4868m
Flash point : 25 ¡É
Max Filling Rate Vi: 8 m3/hr(inlet ÂÊ ÆßÇÁÀÇ À¯·®À¸·Î ±âÀÔ)
Max Empting Rate Vo: 12 m3/hr(Outlet ÂÊ ÆßÇÁÀÇ À¯·®À¸·Î ±âÀÔ)
Wetted Area(Exposed Surface Area of Tank) S: 53.9 m2(API 2000¿¡¼´Â ÅÊÅ© ³»ºÎÀÇ ¾×ü¿Í ¿ÜºÎ ÈÀç·Î ºÎÅÍÀÇ
¿¿¡ ³ëÃâµÇ´Â ¸éÀûÀ̶ó°í Çϴµ¥ º¸Åë Shell and Roof
area¸¸ ÇÏ¸é µÇ´ÂÁö. ¿©±â¼´Â Shell and Roof area¸¸
³ÖÀ½. Ex) (( ¥ð x D ) / 4) + ¥ð x D x H ·Î °è»êÇÔ.)
Capacity C: 35.5 m3 . Ex) (( ¥ð x D2 ) / 4) x H ·Î °è»ê
Thermal Venting Capacity Requirement, Qt( »ó¿Â »ó¾Ð, 15¡É 1atm) ©¬ Áõ¹ßµÇ´Â Áõ±âÀÇ ¾ç
C < 3180m3, Qt = 0.178 x C, C > 3180m3, Qt = 0.61 x S
À§ ½ÄÀº API 2000¿¡ 6page(Table 2¿¡ ÀÖ´Â Note a.)¿¡ º¸¸é C < 20000bbl(3180m3) 0.169Nm3/hr per cubic meter,
C > 20000bbl(3180m3) 0.577Nm3/hr per square meter. Normal »óÅ À϶§ÀÇ °ªÀ̹ǷΠ»ó¿Â »ó¾ÐÀ¸·Î ȯ»êÇϸé,
0.169Nm3/hr à 0.178m3/hr, 0.577Nm3/hr à 0.61m3/hr ·Î ȯ»êµÊ.
±×·¯¹Ç·Î ÇöÀç Flash point°¡ 25¡É À̹ǷΠQt = 6.3m3/hr
1) For Oil with Flash Point Below 37.8¡É(100¢µ) ©¬ API 2000¿¡ 5page(Table 1)¿¡ ±âÁØ(Normal Venting
Requirements)
In breathing(Vacuum Relief)
Total Venting Capacity Requirement Qi = (1 x Vo) + Qt (ÅÊÅ©¿¡¼ Outlet µÇ´Â ¾ç + Áõ¹ßµÇ´Â Áõ±âÀÇ ¾ç)
À§ ½ÄÀº Table 1 ±âÁØÀ¸·Î Liquid Movement Out°¡
0.94Nm3/hr ¿¡¼ 15¡É ±âÁØÀ¸·Î 0.99m3/hr À̹ǷΠ1¿¡
°¡±î¿òÀ¸·Î »ý·«.
Out breathing(Pressure Relief)
Total Venting Capacity Requirement Qo = (2.14 x Vi) + Qt (ÅÊÅ©¿¡¼ Outlet µÇ´Â ¾ç + Áõ¹ßµÇ´Â
Áõ±âÀÇ ¾ç)
À§ ½ÄÀº Table 1 ±âÁØÀ¸·Î Liquid Movement Out°¡
2.00Nm3/hr ¿¡¼ 15¡É ±âÁØÀ¸·Î 2.137m3/hr¿¡ °¡±î¿ö¼
Ç¥±â µÊ.
±×·¯¹Ç·Î Qi = 18.3m3/hr, Qo = 23.4m3/hr