Silo capacity calculation
Author: w | 2025-04-25
silo capacity calculator. All silo capacity calculator wholesalers silo capacity calculator manufacturers come from members. We doesn't provide silo capacity calculator products or
silo capacity calculator - Wholesale silo capacity calculator
Deprecation noticeThis plugin is not further developed and it might break with upcoming Cumulocity releases. Use it at your own risk.The repository is archived but feel free to fork & adapt it to your needs in a new repo.Cumulocity Silo Capacity Widget Plugin Cumulocity Silo Capacity Widget is the Cumulocity module federation plugin created using c8ycli. This plugin can be used in Application Builder or Cockpit. It displays a configurable silo capacity graphic with fill levels, foreground image overlay, optional background image and colorized thresholds.Please choose Silo Capacity Widget release based on Cumulocity/Application builder version:APPLICATION BUILDER CUMULOCITY SILO CAPACITY WIDGET PLUGIN 2.0.x>=1018.0.0 1.2.x2.0.x>=1016.0.0 1.1.xFeaturesConfigurable cylinder: Set the height, width, color and location of the cylinder in your widgetConfigurable volume calculation Display remaining volume or fill volumeOptional foreground image: Upload and dynamically position a foreground image over the top of the cylinderOptional background image: Upload and dynamically position a background image behind the cylinderConfigurable labels: Add your own description labels for the levelsOptional Thresholds: Set high and medium thresholds with custom colorsDevelopment debug mode: Use the debug mode to check the cylinder range and to accurately position your images over the cylinderPrerequisiteCumulocity c8ycli >=1018.x.xInstallationRuntime Widget Deployment?This widget support runtime deployment. Download Runtime Binary and install via Administrations --> Ecosystems --> Applications --> PackagesQuickStartThis guide will teach you how to add the widget in your existing or new dashboard.Open the Application Builder application from the app switcher (Next to your username in the top right)Add a new dashboard or navigate to an existing dashboardClick Add WidgetSearch for Silo CapacitySelect Target Assets or DevicesClick SaveCongratulations! Silo Capacity is configured.User GuideConfiguration optionsThe widget configuration page contains a number of configuration attributes.Title : Enter the title which will display at the top of your widgetTarget Assets or Devices : Select your deviceMeasurement Configuration sectionMeasurement : Select the measurement fragment and series from the dropdownNOTE: Once the Target Assets or Devices and Measurement information has been populated, you can click the 'Save' button to configure the widget with the default settingsMaximum fill level label : Enter the label which will be displayed above the maximum fill
silo capacity calculation list - silo capacity calculation for sale
9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Welcome to Resources Engineering Menu access Tank Cleaning Head supplier High-e cient, Durable High-e cient, Affordable for Cleaning tanks, Barrels and Vessels, up to 6.7m diameter. ccnozzle.com OPEN Silos design - Flow of powder Silos design calculation method Don't want to design ? Do you want to solve a discharge problem in your silo ? If yes, access our HOW TO : How to solve ow problems ? Follow us on Twitter Question, remark ? Contact us at [email protected] Section summary 1. Silo / Hopper Design Calculation Methods 2. Discharging aids 3. Air balancing 4. Good practices Silo Design 1/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Menu Engineering Resources access Tank Cleaning Head Factory Durable, 316 Stainless Steel High Quality, Affordable for Cleaning tanks, Barrels and Vessels, up to 6.7m diameter. ccnozzle.com OPEN What it is about Powder handling processes are made of many unit operations, some complex, some that can seem easier. Discharging powder is often overlooked, however, issues in this a priori simple operation can lead to huge losses. Discharging powder must be - Reliable - Fast enough - Controlled Ad From 3D development to installation, we produce silos and storage systems Visit Site The performance of an industrial process will be judged, among other parameters, according to its capacity to reach a nominal speed (expressed in terms of throughput, cycle time or number of batches / h). If a hopper which is supposed to deliver powder at a given rate cannot do it, be it placed at the beginning, middle, or end of the process, the whole installation "speed" will be affected 1. Silo / Hopper Design Calculation methods 2/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… 1.1 Why it is important PowderProcess.net Menu Powder has a given ability to slideSilo Volume and Capacity Calculator
Hopper can be used. In food application, conical hoppers will be preferred, because of the easiness of cleaning. Wedge-shaped can be preferred in order to maximize the hopper size but the type of powder feeder at the base of the silo will have also to be determined (star valve di cult to t to a wedgeshaped hopper for example). 6/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Menu Engineering Resources access Figure 2 : Abascus for discharge hopper angle calculation [1] Graphs can be used the following way : For example, the powder has been determined to have a wall friction angle of 5 degrees and has been determined to have an angle of internal friction of 30 degree. Take 5 degrees wall friction angle and draw a straight until meeting the 30 degrees curve. The abscisse is giving you a minimal angle of 23 degrees. Take 3 degrees margin and select 20 degrees for you hopper STEP 3 - Calculate the ow factor (FF) 7/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… The ow factor (FF) can be calculated from an abacus presenting the wall friction angle as a function of the hopper angle. The graph is divided in different areas that represent different ow factor. PowderProcess.net Engineering 01 Hand Tool Resources Organizer Menu access a 02 Automotive Service Tools a 03 Energy Saving Tips a 04 Air Impact Tools a 05 Online Engineering Degrees a For wedge shaped hopper For cone shaped hopper Figure 3 : Abascus for ow factor calculation [2] STEP 4 - Calculate the critical cohesive strength (fc_crit) On the ow factor graph, a straight line with the slope 1/FF is drawn. The point where it crosses the ow function will give the critical cohesive strength fc_crit. 8/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Engineering Resources Menu. silo capacity calculator. All silo capacity calculator wholesalers silo capacity calculator manufacturers come from members. We doesn't provide silo capacity calculator products orSilo capacity calculator - iwigroup.com
Mass ow silos 3. Dilute phase pneumatic conveying design and calculation 4. IBC bin mixing equipments 5. Measuring degree of mixing -------------- 4/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Engineering Resources Menu access -------------Top 5 New 1. Continuous Dry Mixing 2. Mixing speed 3. Mixer capacity optimization 4. Batch / continuous mixing comparison 5. Improve energy e ciency of your process Table 1 : Silo design parameters 5/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… Key silo design parameters Discharge diameter (avoids arching and ratholing) PowderProcess.net Engineering Resources The discharge angle Menu access The volume of the silo The discharge rate from the silo 1.2 Calculating the silo discharge diameter with the method of Jenicke 1 Online Engineering Schools a 2 Used Industrial Equipment a 3 Bosch Hand Tools a 4 Energy Saving Tips a 5 Bosch Power Tools a STEP 1 - Get information on the powder The following data must be known in order to calculate the silo : The Powder Flow Function, the wall friction angle, the static angle of internal friction Knowing the characteristics of the product to discharge is the 1st and mandatory step to properly design a hopper. The powder characteristics can be determined thanks to a shear tester (see section on powder characteristics). From these characteristics, a critical discharge diameter can be calculated. The critical discharge diameter is the diameter under which the product will risk to arch. It must be noted that different diameters can be calculated depending on the type of bin to be implemented STEP 2 - Calculate the hopper angle for mass ow It is usually desirable to have a mass ow happening in silos or hoppers. Jenicke has tabulated, for different wall friction angle and internal friction angle the maximum hopper angle for which we can get a mass ow. It is 1st necessary to know if a conical hopper shape is preferred or a wedge-shapedcalculation of capacity of silos - tablesandthyme.co.za
Access Figure 4 : Flow Function and Material Flow Functions to calculate Critical Applied Stress STEP 5 - Calculate the parameter H The H parameter is used in the formula to calculate the critical outlet diameter to prevent arching. It is calculated from an abascus, knowing the hopper discharge angle calculated in step 2. 9/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Engineering Resources Menu access Figure 5 : Abascus for H parameter calculation Note : the green line corresponds to wedge shaped hoppers, the red line to axi-symetric hoppers (cone) How to calculate the outlet diameter of a silo ? STEP 6 - Calculate the critical outlet diameter All necessary data are known to calculate the minimal outlet diameter to avoid arching : Equation 1 : critical outlet diameter to avoid arching [2] With ρb the bulk density under a consolidation corresponding to σcrit=fccrit Note : For large silos, the effect of time consolidation corresponding to the estimated maximum time powder can stay in the silo must be determined also. This can lead to the calculation of 2 critical diameters and help to position discharging aids in the hopper / silo. STEP 7 - Calculate the rathole diameter The critical rathole diameter is determined from the following equation : 10/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… Equation 2 : critical outlet diameter to avoid ratholing [2] PowderProcess.net Engineering Resources with fc the cohesive strength of the powder at the calculated consolidation pressure Menu access Figure 6 : Abascus for G parameter calculation After calculating the diameters above, it is necessary to consider the larger one in order to avoid both arches and ratholes. If the diameter calculated is too large to be feasible, then the addition of discharging aids to the silo will be necessary. 1.3 Types of bins The following types of bins can be designed - Mass Flow bin : with a conical discharge andSilo capacity calculator - Alibaba.com
Is safe, efficient, and can handle the electricity demand. Frequently Asked Questions Q1. Why is electrical load calculation crucial in commercial buildings? Electrical load calculation is crucial in commercial buildings to ensure electrical safety, system efficiency, and compliance with electrical safety codes. Q2. Can I perform electrical load calculation on my own? Electrical load calculation is a complicated process that requires expertise and knowledge. It is recommended to hire a professional electrical engineer to perform the analysis. Q3. What happens if the calculated load requirement exceeds the system's capacity? If the calculated load requirement exceeds the system's capacity, appropriate measures such as system upgrades or reducing the load may be necessary for electrical safety and system efficiency. Q4. How often should I perform electrical load calculation? Electrical load calculation should be performed whenever there are significant changes to the electrical system or the building's occupancy and usage. It is recommended to perform the analysis every five years. Conclusion Commercial electrical load calculation is a crucial process that requires attention to detail and expertise to ensure electrical safety and system efficiency. It involves several steps, including analyzing the electrical demand of each component and the system's capacity. Adequate electrical load calculation can help prevent electrical hazards, hefty penalties, and legal complications, making it essential in any construction project. Gallery Electrical Commercial Load Calculation EWC CH#3 10 09 12 - YouTube Photo Credit by: bing.com / load electrical calculation commercial heat hvac worksheet rule calculations thumb spreadsheet excel air form ewc conditioning ch3 sheet main Electrical Load Calculation Spreadsheet Payment Spreadshee Electrical Photo Credit by: bing.com / load electrical calculation spreadsheet commercial residential costing job construction excel knowhow rule intended inspirational db example google building Nec Commercial Load Calculation Worksheet - Promotiontablecovers Photo Credit by: bing.com / calculation hvac nec spreadsheet Electrical Load Calculation Photo Credit by: bing.com / load calculation electrical Commercial Electrical Load Calculation Spreadsheet Within Example Of Photo Credit by: bing.com / calculation spreadsheet GeneralSilo Capacity Calculator - Online Calculators
We have a grain silo that consists of a cylindrical main section and a hemispherical roof. The total volume of the silo is given as 15,000 cubic feet and the height of the cylindrical part is 30 feet. We are asked to find the radius of the silo. Show more… Fasiha Binat Zafar and 58 other Algebra educators are ready to help you. Ask a new question Algebraic Equation Setup and Solving This concept involves forming an equation by adding the volumes of individual components of a composite shape and setting it equal to a given total volume. The equation is then solved for the unknown variable (in this case, the radius), requiring skills in algebraic manipulation and solving equations. Composite Solid Analysis This concept pertains to the process of calculating the total volume of an object made up of several simple geometric shapes by summing the volumes of each individual part. This approach is useful in solving problems where an object comprises multiple sections, each with its own volume formula. Hemisphere Volume Calculation This concept involves finding the volume of a hemispherical shape, which is exactly half the volume of a sphere. Using the sphere volume formula V = (4/3)?r³, the hemisphere volume is calculated as V = (2/3)?r³. It is crucial when the object has a rounded section that contributes to its overall volume. Cylinder Volume Calculation This concept involves determining the volume of a cylindrical shape by multiplying the area of its circular base by its height, using the formula V = ?r²h. It is essential for understanding how the volume of a cylindrical section contributes to the total volume of a composite object.. silo capacity calculator. All silo capacity calculator wholesalers silo capacity calculator manufacturers come from members. We doesn't provide silo capacity calculator products or
Silo Capacity Calculator - Savvy Calculator
And fall when it is stored in a hopper. A key variable that will have an Engineering access impact on the Resources ow of product outside of a bin is its cohesive strength. In a bin, the powder is submitted to pressure, due to the fact that there is a height of powder in the bin, the powder on top pushing on the powder below the hopper. Due to the pressure, some solids tend to be more cohesive, when powders become cohesive, they can form archs or rathole, 2 phenomena very detrimental to the ow of powder and the discharge of hoppers. From 3D development to installation, we produce silos and storage systems Ad Silos & Silos Learn more However, it must be noted that the stress (pressure) in a silo lled with bulk solids has a very different pro le compared to what happens with liquid. 3/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Engineering Resources Silos for Food Industry Menu access From 3D development to installation, we produce silos and storage systems Silos & Silos Figure 1 : Stress pro le in bulk solids silos The powder is consolidated in the top part due to pressure. But in the cone, the stress applied to the powder decreases which means that the forces pushing the product to ow are minimal : arching (powder is blocked in a stable state) can thus happen at this level in the hopper. The design of the silo has as an objective to nd the couple cone angle + diameter of outlet that will manage to keep a constraint on the powder high enough to break arches and make the product ow naturally. The diameter of the outlet of a bin can be calculated in order to avoid both arching and ratholing, thus maximizing the chances to ensure a proper ow of product. When designing a silo, the following parameters must be calculated : Top 5 Most Popular 1. Avoid and solve pipe blockages in pneumatic conveying 2.Silo Capacity Calculator - Calculator inteligent
1: 2 to 3“C” Grain to Liquor (B heavy/ C light) ratio – 1 : 3 to 4B massecuite purity online calculation sheet | Sugar TechnologyC massecuite final purity calculation |Grain Quantity requirement for C CVPMassecuiteBoiling HoursNo. of strikes per day per panQuantity of grain required in TonQuantity of massecuite per strike in TonNo. of pans requiredA Grain424/4 = 61656/2 = 828828/6 = 138138/60 = 2.3 (70T x 2 nos.)B Grain624/6 = 4720/3 = 240240/4 = 6060/60 = 1 no.C Grain824/8 = 3444/4 = 111111/3 = 14837/60 ≈ 1 no.Thumb rules for finding the capacities of batch/continuous pansNote: It is not accurate capacity but it gives approximate value instantlyBatch pans“A” Batch pan capacity in Ton – TCD x 0.06 ( Ex: 5000 x 0.06 = 300 T )“B” Batch pan capacity in Ton – TCD x 0.04 ( Ex: 5000 x 0.04 = 160 T )“C” Batch pan capacity in Ton – TCD x 0.03 ( Ex: 5000 x 0.03 = 150 T )Continuous pans“A” Continuous pan capacity in Ton – TCD x 0.014 ( Ex: 5000 x 0.015 = 75 T/hr )“B” Continuous pan capacity in Ton – TCD x 0.006 ( Ex: 5000 x 0.006 = 30 T /hr)“C” Continuous pan capacity in Ton – TCD x 0.004 ( Ex: 5000 x 0.004 = 20 T /hr)“A” Grain pan capacity in Ton – TCD x 0.025 ( Ex: 5000 x 0.025 = 125 T )“B” Grain pan capacity in Ton – TCD x 0.01 ( Ex: 5000 x 0.01 = 50 T )“C” Grain pan capacity in Ton – TCD x 0.01 ( Ex: 5000 x 0.01 = 50 T )Low Grade Massecuite Treatment in Sugar Crystallization ProcessSugar Seed Slurry Requirement Calculation for B and C massecuiteTypes of Graining Techniques in sugar crystallization process | Pan BoilingPan Supply. silo capacity calculator. All silo capacity calculator wholesalers silo capacity calculator manufacturers come from members. We doesn't provide silo capacity calculator products orSilo Capacity Calculator - Calculator Academy
A circular outlet / or with a non conical discharge with a wedged shape outlet - Funnel Flow bin : with a circular outlet / or rectangular outlet Mass Flow bin : all the mass of product will move at the same time. This type is to be preferred to get close to a FIFO (First In First Out). These bins can be sensitive to arching. Funnel Flow bin : the discharge of the product at the center of the bin will be promoted, a funnel will be created. These bins are sensitive to arching AND ratholing It is generally advantageous in the industry to design a mass ow bin, which, when designed properly will ensure a reliable ow out of the silo. What can happen also is that a bin is intended to perform as a mass ow bin but actually behaves as a funnel ow bin... Questions must then be raised to understand 11/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… why this behavior is experienced, Re-calculating the minimum diameters and angle of discharge can be a starting point to troubleshoot the behavior observed. Funnel ow bins are subject to ratholes. PowderProcess.net Ratholes can cause severe problems for very large silos at the moment the product stuck on theMenu side is collapsing : indeed, the collapse can make a large amount of material fall, if the silo has not been Engineering Resources access designed to handle such pressure, it will fail and be deformed [4]. Figure 7 : Bin discharge patterns For each of these bins type, the critical outlet diameter, to avoid arching and ratholing, should be calculated in order to ensure a good ow. 1.4 Feeders used at discharge of hopper Feeders are positioned after a hopper to control the discharge, dose the solid if necessary, or reach another unit operation while reducing the height of the installation (case of screw and vibrating feeders). 4 feeders are considered here and cover most of the cases in the industry : simple butterComments
Deprecation noticeThis plugin is not further developed and it might break with upcoming Cumulocity releases. Use it at your own risk.The repository is archived but feel free to fork & adapt it to your needs in a new repo.Cumulocity Silo Capacity Widget Plugin Cumulocity Silo Capacity Widget is the Cumulocity module federation plugin created using c8ycli. This plugin can be used in Application Builder or Cockpit. It displays a configurable silo capacity graphic with fill levels, foreground image overlay, optional background image and colorized thresholds.Please choose Silo Capacity Widget release based on Cumulocity/Application builder version:APPLICATION BUILDER CUMULOCITY SILO CAPACITY WIDGET PLUGIN 2.0.x>=1018.0.0 1.2.x2.0.x>=1016.0.0 1.1.xFeaturesConfigurable cylinder: Set the height, width, color and location of the cylinder in your widgetConfigurable volume calculation Display remaining volume or fill volumeOptional foreground image: Upload and dynamically position a foreground image over the top of the cylinderOptional background image: Upload and dynamically position a background image behind the cylinderConfigurable labels: Add your own description labels for the levelsOptional Thresholds: Set high and medium thresholds with custom colorsDevelopment debug mode: Use the debug mode to check the cylinder range and to accurately position your images over the cylinderPrerequisiteCumulocity c8ycli >=1018.x.xInstallationRuntime Widget Deployment?This widget support runtime deployment. Download Runtime Binary and install via Administrations --> Ecosystems --> Applications --> PackagesQuickStartThis guide will teach you how to add the widget in your existing or new dashboard.Open the Application Builder application from the app switcher (Next to your username in the top right)Add a new dashboard or navigate to an existing dashboardClick Add WidgetSearch for Silo CapacitySelect Target Assets or DevicesClick SaveCongratulations! Silo Capacity is configured.User GuideConfiguration optionsThe widget configuration page contains a number of configuration attributes.Title : Enter the title which will display at the top of your widgetTarget Assets or Devices : Select your deviceMeasurement Configuration sectionMeasurement : Select the measurement fragment and series from the dropdownNOTE: Once the Target Assets or Devices and Measurement information has been populated, you can click the 'Save' button to configure the widget with the default settingsMaximum fill level label : Enter the label which will be displayed above the maximum fill
2025-04-119/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Welcome to Resources Engineering Menu access Tank Cleaning Head supplier High-e cient, Durable High-e cient, Affordable for Cleaning tanks, Barrels and Vessels, up to 6.7m diameter. ccnozzle.com OPEN Silos design - Flow of powder Silos design calculation method Don't want to design ? Do you want to solve a discharge problem in your silo ? If yes, access our HOW TO : How to solve ow problems ? Follow us on Twitter Question, remark ? Contact us at [email protected] Section summary 1. Silo / Hopper Design Calculation Methods 2. Discharging aids 3. Air balancing 4. Good practices Silo Design 1/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Menu Engineering Resources access Tank Cleaning Head Factory Durable, 316 Stainless Steel High Quality, Affordable for Cleaning tanks, Barrels and Vessels, up to 6.7m diameter. ccnozzle.com OPEN What it is about Powder handling processes are made of many unit operations, some complex, some that can seem easier. Discharging powder is often overlooked, however, issues in this a priori simple operation can lead to huge losses. Discharging powder must be - Reliable - Fast enough - Controlled Ad From 3D development to installation, we produce silos and storage systems Visit Site The performance of an industrial process will be judged, among other parameters, according to its capacity to reach a nominal speed (expressed in terms of throughput, cycle time or number of batches / h). If a hopper which is supposed to deliver powder at a given rate cannot do it, be it placed at the beginning, middle, or end of the process, the whole installation "speed" will be affected 1. Silo / Hopper Design Calculation methods 2/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… 1.1 Why it is important PowderProcess.net Menu Powder has a given ability to slide
2025-04-11Mass ow silos 3. Dilute phase pneumatic conveying design and calculation 4. IBC bin mixing equipments 5. Measuring degree of mixing -------------- 4/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Engineering Resources Menu access -------------Top 5 New 1. Continuous Dry Mixing 2. Mixing speed 3. Mixer capacity optimization 4. Batch / continuous mixing comparison 5. Improve energy e ciency of your process Table 1 : Silo design parameters 5/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… Key silo design parameters Discharge diameter (avoids arching and ratholing) PowderProcess.net Engineering Resources The discharge angle Menu access The volume of the silo The discharge rate from the silo 1.2 Calculating the silo discharge diameter with the method of Jenicke 1 Online Engineering Schools a 2 Used Industrial Equipment a 3 Bosch Hand Tools a 4 Energy Saving Tips a 5 Bosch Power Tools a STEP 1 - Get information on the powder The following data must be known in order to calculate the silo : The Powder Flow Function, the wall friction angle, the static angle of internal friction Knowing the characteristics of the product to discharge is the 1st and mandatory step to properly design a hopper. The powder characteristics can be determined thanks to a shear tester (see section on powder characteristics). From these characteristics, a critical discharge diameter can be calculated. The critical discharge diameter is the diameter under which the product will risk to arch. It must be noted that different diameters can be calculated depending on the type of bin to be implemented STEP 2 - Calculate the hopper angle for mass ow It is usually desirable to have a mass ow happening in silos or hoppers. Jenicke has tabulated, for different wall friction angle and internal friction angle the maximum hopper angle for which we can get a mass ow. It is 1st necessary to know if a conical hopper shape is preferred or a wedge-shaped
2025-04-12Access Figure 4 : Flow Function and Material Flow Functions to calculate Critical Applied Stress STEP 5 - Calculate the parameter H The H parameter is used in the formula to calculate the critical outlet diameter to prevent arching. It is calculated from an abascus, knowing the hopper discharge angle calculated in step 2. 9/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… PowderProcess.net Engineering Resources Menu access Figure 5 : Abascus for H parameter calculation Note : the green line corresponds to wedge shaped hoppers, the red line to axi-symetric hoppers (cone) How to calculate the outlet diameter of a silo ? STEP 6 - Calculate the critical outlet diameter All necessary data are known to calculate the minimal outlet diameter to avoid arching : Equation 1 : critical outlet diameter to avoid arching [2] With ρb the bulk density under a consolidation corresponding to σcrit=fccrit Note : For large silos, the effect of time consolidation corresponding to the estimated maximum time powder can stay in the silo must be determined also. This can lead to the calculation of 2 critical diameters and help to position discharging aids in the hopper / silo. STEP 7 - Calculate the rathole diameter The critical rathole diameter is determined from the following equation : 10/19 9/27/2019 Calculation method for Design Silos and Hoppers - Silos and hopper Flow of powder - Flowability issues solving - Discharge through… Equation 2 : critical outlet diameter to avoid ratholing [2] PowderProcess.net Engineering Resources with fc the cohesive strength of the powder at the calculated consolidation pressure Menu access Figure 6 : Abascus for G parameter calculation After calculating the diameters above, it is necessary to consider the larger one in order to avoid both arches and ratholes. If the diameter calculated is too large to be feasible, then the addition of discharging aids to the silo will be necessary. 1.3 Types of bins The following types of bins can be designed - Mass Flow bin : with a conical discharge and
2025-04-10