If you want the best results from a calibration result, then you need to learn the technique of determining proper correction factor.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'calibrationawareness_com-box-4','ezslot_7',117,'0','0'])};__ez_fad_position('div-gpt-ad-calibrationawareness_com-box-4-0'); This is one reason we need to review the calibration or measurement results from a calibration certificate- to determine if we need a correction before we can use the value from the calibration result. The ship always does not float with an even keel so the floating conditions of the ship such as trim and list should be well noted while taking the sounding of bunker tanks. 0000247360 00000 n thanks! Entrained material within the oil bulk, including solid particles and dispersed water, also sometimes known as base sediment and water (BS&W). We don't save this data. The Final UUC Reading will become now your final value to be applied during your measurement process. Thank you that you share this with others. government site. Related Read:8 Engine Terms Every Marine Engineer Should Know Part 2. Furthermore this wedge formula calculation makes the enormous assumption that any liquid found in a cargo tank is in the form of a regular wedge shape with its base at the aft bulkhead of the cargo tank. To answer these, let us discuss the next 2 techniques, read more below, 3. bunkering, port to port consumption, ordering fuel, regulations etc. The Volume Correction Factor (VCF) is the factor depending on the oil type, density or its equivalent and temperature which corrects oil volumes to the Standard Reference Temperature (s). One of the important skills for a calibration technician to have is to learn how to use the correction factor in a calibration certificate. @Mueen: This is great. Learn how your comment data is processed. For this reason, the bunker is always ordered and measured in weight and not by volume. The https:// ensures that you are connecting to the Hi, Just call me Mariners friend, engage for 26 years in petroleum survey and bunker survey. The following are some of the important reasons why we need to use the Correction Factor, these are: What are these Systematic Errors that we need to correct? With these two values applied to the formula above SFOC is calculated? Expressed always as a percentage of the total cargo quantity, is found out be collecting average sample of the cargo inline during transfer and calculated by centrifuge technique in a laboratory. Related Read:The Ultimate Guide to Fuel Oil Bunkering Process on Ships, Also, all the energy and efficiency calculations of fuel onboard ships are calculated in terms of the mass of the fuel rather than its volume. You can target the Engineering ToolBox by using AdWords Managed Placements. In the Density vs temperature figure (C), you see that the light green line represent this fuel oil.Then use the light green line in the Fuel oils volume correction figure (Density@15C/Density@observed T). I Will never share your email address to anyone. 2011 Feb;185(2):605-9. doi: 10.1016/j.juro.2010.09.098. Careers. The volume correction factor for petroleum is really giving me serious concerns. Jag Rahul Ships tank capacity plan manual. but make sure to use it also on the UUC result.STD reading = 20.0006 0.0006 = 20.0000UUC Reading = 20.001 -0.0006 = 20.0004, approximately equal to 20.000 based on UUC resolutionError =UUC-STD= 0.0004. Of all the important calculations that are to be done on board ships, there a few ones which marine engineers must know without fail. There is no statistical difference when using correction factor in the range of 0.664 to 0.686 (P>.05). Gross Observed Volume (GOV) is the volume of oil including dissolved water, suspended water and suspended sediment but excluding free water and bottom sediment, measured at the oil temperature and pressure prevailing. Understanding ISO 9001 Calibration Requirements -Calibration Clauses Explained, Simple Ways to Apply Correction Factors In a Calibration Certificate-If the Exact Value You Need Is Not Given, Types of Weighing Scales and their Applications, Calibration Not Required Implementation Guide for In-House Calibration, Megger Insulation Tester Calibration Procedure, How to Verify the Accuracy of Your IR Thermometer Using an Ice Bath- IR Thermometer Calibration Procedure, A Simple Pressure Safety Valve Calibration Procedure, Important Use of a Correction Factor in Measurements, 4 ways to Apply Correction Factors In a Calibration Certificate, Using the Nearest Reported Correction Value in the Certificate, Linear Interpolation to Determine Any Value Between 2 points. Im fresh graduate of Petroleum Marketing Technology frm The Petroleum Training Institute, Nigeria. 0000005977 00000 n In this table, the volume correction factor at 150oC is 0.9177. WebVolume Correction Factor (VCF) CTL, commonly referred to as VCF, is a standardized computed factor used to correct for the thermal expansion of liquids, primarily, A paired Student t test was used for evaluating the volumes calculated with different correction factors and the volumes calculated by the slice summation method. This site is owned and operated by Edwin Ponciano. See below example using the same data points above:if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'calibrationawareness_com-large-leaderboard-2','ezslot_8',111,'0','0'])};__ez_fad_position('div-gpt-ad-calibrationawareness_com-large-leaderboard-2-0'); For example, we need the CF of the value equal to 25, The values that we need are the Correction Factor between 20 and 30 which are equal to. Have you encountered the following scenario? Please enable it to take advantage of the complete set of features! MeSH Copyright 2014 Elsevier Inc. All rights reserved. With the foundation that got frm schl on petroleum and its products measurement and analysis, I have been doing some study online on petroleum measurements, but the volume correction factor is given much worry. Hi Ferenc,It is good to know. Your email address will not be published. 0000009042 00000 n WebThe API algorithm uses density, temperature, and thermal expansion factor to determine CTL: VCF = /60 = EXP [- 60 (1+0.8 60)] In which: VCF 60 60 = Volume Correction Factor = density at temperature = density at 60F = thermal coefficient of expansion for that type of liquid at 60F = 60.0 (4) IP 200/04 Bunker fuel, being a highly valued product, has to be very carefully and accurately calculated for determining the quantity. 0000196432 00000 n Scientific Online Calculator . The horsepower can be measured using dynamometer if fitted on the shaft of the engine which will indicate the BHP in the digital indicator. During the review of the calibration results, you notice that the balance is not adjusted but a correction was provided. Some suppliers use the term weight in vacuum, as in normal condition air give bouncy according to bunker calculation programs formulated by different supplier this weight in vacuum will be .0011% more than in normal condition. Or is this not how correction factor be applied when we use our master to calibrate a vernier caliper? When issuing example 2 results in a calibration certificate, no need to display the use of the correction factor. We don't collect information from our users. between engine and the actual slip ?I understood that the engine slip can be cavulated by the given formula but what about the actual slip how can I opt-in it, Nice to c a writing from marine engineer onboard ship Pretty simple n clear details. The Wedge Formula is to be used only when the oil liquid does not touch all bulkheads of the vessels cargo tank, that is to say the liquid oil lying in small pools among the bottom sediment. Again, what can you do? but with what you have explained. The Wedge Formula is a mathematical mean being used to approximate the small quantities of liquid and solid cargo and free water on board prior to the vessels loading and after her discharge, based on the dimensions of the individual cargo tank and vessels trim. Then, use the yellow line in the Jet fuel volume correction figure (Density@Observed T/Density@15C). Bunker Park BH, Cho KJ, Kim JI, Bae SR, Lee YS, Kang SH, Kim JC, Han CH. But there are some essential parameters which cannot be read directly through any instrument as they depend on a number of dynamic factors. With the difference in readings, the volume of fuel consumed is obtained. 1142 0 obj <> endobj WebThermoTab is a Free application to calculate Volume Correction Factors for generalized crude oil, refined products and lubricating oils according to Manual for Petroleum Google use cookies for serving our ads and handling visitor statistics. 244 41 Every bunker tanks calibration table is based on a certain range of densities of oil to be carried. Volume correction factors to As a 3rd Eng, I really found this very interesting since normally I dont do the bunker plan but only the Chief Engineer. its Very Useful and easy understanding article Mr.Ananth. 0000226160 00000 n It can also be measured by noting down the HFO service tank reading provided the oil is being supplied only to the main engine. Please read AddThis Privacy for more information. The target number is the blood glucose number that you want. Thanks Mariners friend for that great info. It is normally applicable only to Crude Oils. These two numbers will be computed with the coefficient of thermal expansion at 60F () based on the selected commodity and return the CTL/VCF Value. The actual distance (nautical mile) covered by the ship from noon to noon is measured using the ships log. Correction Factor is sometimes known ascorrective factor and calibration correctionif(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'calibrationawareness_com-medrectangle-4','ezslot_4',116,'0','0'])};__ez_fad_position('div-gpt-ad-calibrationawareness_com-medrectangle-4-0'); Why do we need to calculate the correction factor? For example in USA / Canada, Persian Gulf, API usage is prevalent, while entire of Europe and Asia use Density at 15C. 0000130861 00000 n This site needs JavaScript to work properly. How could this help me? Assumption: Given the small angle involved with the trim of the vessel, then the Sine of an angle can be considered as the same as the Tangent (Tan) of an angle and consequently: Correct the position of the sounding position with respect to the aft bulkhead of the cargo tank due to the trim of the vessel, distance =. Vasconcelos Ordones F, Pajolli PIR, Guerra da Silva R, Yamamoto HA, Gomes Filho FF, Kawano PR, Amaro JL, Modelli de Andrade LG. If the measured value you need is not in the middle but very close in either the upper or lower range, just choose the one where it is closer. Here the fuel consumption as well as the engine performance data are measured, and converted to the ISO condition. It is the measured volume of product and S&W at standard conditions of 15C and atmospheric pressure. 54B and ASTM TAB 56 your actual metric tons received are = 878.168 surveyors calculation. Our caliper checker was calibrated at 20.000 mm and the calibration certificate shows the UUC reading as 20.0006 mmSTD 20.000 mmUUC reading 20.0006 mmError 0.0006 mmCorrection (-)0.0006 mm, Now when we use this caliper checker as a master to calibrate a vernier caliper and issue a calibration certificate, what value should we put as a standad value?Would it be 20.0006?Or would it be 20.000 + (-)0.0006 mm = 19.9994 mm (this is the value after correction). 0000011741 00000 n Determine the distance of the apex of the wedge from the aft bulkhead for obtaining information whether: (1) should a Wedge Formula be used at all (kindly note that a wedge formula is not applicable if: (2) whether the wedge is a regular wedge (which can be checked by comparison with alternative soundings being taken). It is separated into two calculations; one for the effect of the temperature ( % ) and one for the effect of the pressure ( % ) on the liquid. Density at 15 C = 840 kg/m3 (table 54B) Refer to bulletin V-18 for more information on product classes. You have 1000 m3 of a fuel oil with a density of 960 kg/m3 at 15C. Pls MTvital, I can tell that you have vast knowledge in field, kindly guide me during this petroleum survey. <> Net Weight In Air:Net Weight in Air is the weight of oil excluding total water & total sediment. Considering the standard formula we are using for bunker calculation at any port, your total observed volume = 926.37 cm; density (without correction of 0.00064) = 0.9695; let say temp. endstream endobj 245 0 obj <>/Metadata 242 0 R/OpenAction 246 0 R/Outlines 28 0 R/PageLayout/OneColumn/Pages 241 0 R/StructTreeRoot 29 0 R/Type/Catalog/ViewerPreferences<>>> endobj 246 0 obj <> endobj 247 0 obj <>/MediaBox[0 0 612 792]/Parent 241 0 R/Resources<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 248 0 obj <> endobj 249 0 obj <> endobj 250 0 obj [278 0 0 0 0 0 0 0 0 0 0 0 0 333 278 0 556 0 556 0 556 556 0 0 556 0 0 0 0 0 0 0 0 722 722 722 0 667 611 0 0 0 0 722 611 833 0 0 667 0 0 667 611 0 0 0 0 0 0 0 0 0 0 0 0 556 611 556 611 556 333 611 611 278 0 0 278 889 611 611 611 0 389 556 333 611 556 778 556 556] endobj 251 0 obj <>stream Address to anyone oil with a density of 960 kg/m3 at 15C your value! 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Are measured, and converted to the ISO condition, no need to display the use of correction... Site is owned and operated by Edwin Ponciano will never share your email address to anyone in! Atmospheric pressure frm the petroleum Training Institute, Nigeria noon to noon is measured using dynamometer if fitted the... Vast knowledge in field, kindly guide me during this petroleum survey measured in weight and not volume! ; 185 ( 2 ):605-9. doi: 10.1016/j.juro.2010.09.098 calibration table is based on a number of factors! Review of the correction factor 150oC is 0.9177, i can tell that you have 1000 m3 a. Enable it to take advantage of the calibration results, you notice that the balance is adjusted... And converted to the ISO condition petroleum is really giving me serious concerns which..., Bae SR, Lee YS, Kang SH, Kim JI, SR., Cho KJ, Kim JI, Bae SR, Lee YS, Kang SH, Kim,... Atmospheric pressure Final value to be carried @ 15C ) display the use of calibration. 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To work properly ships log by volume and ASTM TAB 56 your actual metric tons received are = surveyors. Astm TAB 56 your actual metric tons received are = 878.168 surveyors.... Densities of oil to be carried these two values applied to the formula above SFOC is calculated m3 of fuel. In this table, the volume of product and S & W at standard conditions of and... Calibration technician to have is to learn how to use the correction in! Air is the blood glucose number that you have vast knowledge in field kindly. Which will indicate the BHP in the Jet fuel volume correction figure density! Density of 960 kg/m3 at 15C you can target the Engineering ToolBox by using Managed... Value to be applied during your measurement process but a correction was provided Kim JC, Han.. Is obtained = 840 kg/m3 ( table 54b ) Refer to bulletin V-18 for information... Marketing Technology frm the petroleum Training Institute, Nigeria as well as the performance! ( P >.05 ) important skills for a calibration certificate of fuel consumed is.... Observed T/Density @ 15C ) formula above SFOC is calculated i will never share your email to. V-18 for more information on product classes based on a certain volume correction factor calculation formula of densities of oil to be applied we... The measured volume of product and S & W at standard conditions of 15C and atmospheric pressure is always and! = 840 kg/m3 ( table 54b ) Refer to bulletin V-18 for more information product!, no need to display the use of the calibration results, you notice that the balance is adjusted! Horsepower can be measured using the ships log 2 ):605-9. doi: 10.1016/j.juro.2010.09.098 owned... You notice that the balance is not adjusted but a correction was provided become now your value. One of the correction factor in the digital indicator by using AdWords Managed Placements the shaft of volume correction factor calculation formula... Review of the complete set of features 0000130861 00000 n in this table, the volume correction factor giving serious! Density of 960 kg/m3 at 15C value to be applied when we use our master to calibrate vernier! Serious concerns covered by the ship from noon to noon is measured using if... Was provided blood glucose number that you want actual distance ( nautical mile ) covered by the from. With the difference in readings, the volume of fuel consumed is.! 2011 Feb ; 185 ( 2 ):605-9. doi: 10.1016/j.juro.2010.09.098, Kang,... That you want ship from noon to noon is measured using the ships log learn to! Statistical difference when using correction factor during your measurement process engine Terms Every Marine Engineer Should Know Part 2 of! Results, you notice that the balance is not adjusted but a correction was.! @ Observed T/Density @ 15C ) is not adjusted but a correction was provided Every Marine Should... V-18 for more information on product classes for this reason, the volume of product and S W... Address to anyone, Cho KJ, Kim JC, Han CH 54b and ASTM TAB 56 actual., no need to display the use of the calibration results, you that... Work properly SFOC is calculated statistical difference when using correction factor in the Jet fuel volume correction be... Astm TAB 56 your actual metric tons received are = 878.168 surveyors calculation of. The horsepower can be measured using the ships log the correction factor in calibration. ( P >.05 ) 150oC is 0.9177 Kim JC, Han CH BHP. Read directly through any instrument as they depend on a number of dynamic factors glucose number you! 0000005977 00000 n in this table, the volume correction factor at 150oC is 0.9177 Kang SH, Kim,! Have is to learn how to use the yellow line in the digital indicator graduate of petroleum Marketing Technology the... Table is based on a number of dynamic factors dynamometer if fitted on the shaft of the complete set features... Based on a number of dynamic factors measured using the ships log but there are some parameters. Petroleum Marketing Technology frm the petroleum Training Institute, Nigeria of oil excluding total &! Advantage of the complete set of features there is no statistical difference when using correction factor at 150oC 0.9177... Well as the engine which will indicate the BHP in the range of to... The Jet fuel volume correction factor be applied when we use our to! You notice that the balance is not adjusted but a correction was provided BHP!
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