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Ankur's_Chemical_Engg_Blog



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Time Dependent Gas Release Through A Hole From A Pressurized Container

Posted by ankur2061 , in Technical 23 December 2013 - - - - - - · 13,094 views
gas, release, hole, flow and 2 more...
Time Dependent Gas Release Through A Hole From A Pressurized Container Dear All,
 
One of the very important books related to process safety is popularly known as the "Yellow Book" published from the Netherlands and having the full title as:
 
"Methods for the calculation of physical effects - due to releases of hazardous materials (liquids and gases)" - 'Yellow Book' - CPR14E
 
The best part of this book is t...



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Frequently Asked Questions (Faq) About Liquefied Natural Gas (Lng)

Posted by ankur2061 , in Technical 03 December 2013 - * * * * - · 16,951 views
question, lng, liquefied, natural and 1 more...
Frequently Asked Questions (Faq) About Liquefied Natural Gas (Lng) Dear All,
 
LNG is a subject of great interest these days considering that it has become a primary source of energy for many countries deficient in fossil fuel based energy resources. It is also of interest because it is among the cleanest of all fossil fuel based energy resources when compared with other fossil fuel energy sources such as coal and c...



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Pressure Drop Of Pseudo-Plastic Fluids In Pipes

Posted by ankur2061 , in Technical 14 November 2013 - * * * * * · 15,614 views
pressure, drop, pseudo-plastic and 2 more...
Pressure Drop Of Pseudo-Plastic Fluids In Pipes Dear All,
 
Pseudo-plastic fluids are a type of non-newtonian fluids and account for a majority of the non-newtonian fluids commonly found in the chemical process industry and specifically in the food processing industry.
 
Today's blog entry provides a methodology to calculate the pressure drop of a pseudo-plastic fluid in a pipe. An example pr...



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Design Guide For Sizing Vertical Oil Treaters

Posted by ankur2061 , in Technical 23 September 2013 - - - - - - · 16,665 views
design, vertical, oil, treaters and 1 more...
Design Guide For Sizing Vertical Oil Treaters Today's blog entry provides some guidelines for sizing of vertical oil treaters. The procedures described in this blog entry do not give the overall dimensions of the treater, which may include inlet gas separation and free-water knockout sections, dependent on the upstream separation vessels.  However, they do provide a method for specifying heat i...



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Power Consumption Of Vacuum Pumps

Posted by ankur2061 , in Technical 01 September 2013 - * * * * * · 40,060 views
power, consumption, vacuum, pumps
Power Consumption Of Vacuum Pumps I am back on my blog after a wonderful holiday to Canada. I had a lot of fun staying in Vancouver and found BC to be a beautiful place.
 
Today's blog entry deals with quick but reliable estimate of the power consumption of vacuum pumps used in the chemical process industry. Some equations are presented below for the benefit of the readers:
 
Li...



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An Introduction To The Concept Of Double Jeopardy In Process Safety

Posted by ankur2061 , in Technical 05 August 2013 - * * * * * · 48,058 views
process, safety, double, jeopardy
An Introduction To The Concept Of Double Jeopardy In Process Safety Most Process and / or Safety engineers have to perform an analysis for the scenario or case related to the application of a safety relief device during their engineering career. In the chemical process industry, majority of the cases or scenarios for safety relief device are well defined based on experience gathered over the years for operating various ty...



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Guidelines For Fuel Gas Supply To Gas Turbines

Posted by ankur2061 , in Technical 28 July 2013 - - - - - - · 18,575 views
fuel, gas, supply, tubrines and 1 more...
Guidelines For Fuel Gas Supply To Gas Turbines Gas turbines (GT) are expensive and a major investment in any oil & gas, refinery, petrochemical or power generation unit. Any breakdown in gas turbines can lead to plant / unit production deferment or loss of power to the power grid if gas turbines are used for electricity genaeration, and spending large sums of money in repairs and overhauling....



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Design Guidelines For Tank Truck Loading Terminals

Posted by ankur2061 , in Technical 25 June 2013 - * * * * * · 28,226 views
design, guidelines, guide, tank and 4 more...
Design Guidelines For Tank Truck Loading Terminals I have been away for 3 weeks from my blog. Well, was busy on the workfront as well as on personal matters. Travelled home to India to be with the family. Spent some brief but quality time with the family who were keen to light one more candle on the cake.
 
Today's blog entry deals with design guidelines for tank tr...



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Natural Gas Pipeline Blowdown Time Calculation

Posted by ankur2061 , in Technical 02 June 2013 - * * * * * · 52,482 views
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Natural Gas Pipeline Blowdown Time Calculation I have posted a lot of excel spreadsheets on the Cheresources community related to process engineering calculations. I also have posted blog entries where I have outlined the steps along with equations to build an excel spreadsheet for various calculations.
 
The idea of posting blog entries with equations and calculation steps is to encourage young...



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Perforated Pipe Distributor Sizing Calculations

Posted by ankur2061 , in Technical 16 May 2013 - * * * * * · 136,013 views
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Perforated Pipe Distributor Sizing Calculations Perforated Pipe Distributors have been discussed many times on “Cheresources”. How to design a perforated pipe distributor also known as a sparger has been a frequent question on the forum. Some general replies without providing in-depth methodology of sizing a distributor can be seen in the queries raised.

Perry’s Handbook (8th  Editio...



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Theoretical Compressor Discharge Temperature Equations By Gpsa 13Th Edition

Posted by ankur2061 , in Technical 26 April 2013 - * * * * * · 1,357,662 views
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Theoretical Compressor Discharge Temperature Equations By Gpsa 13Th Edition I had mentioned in one of my earlier blog entries that the new GPSA Engineering Databook 13th Edition is now available and there have been many changes in it from the previous edition. Refer the link:
 
http://www.cheresour...ition-si-units/
 
Compressors have been a focal point of...



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Heat Capacity Ratio (κ) Compilation From Hysys At Real Conditions

Posted by ankur2061 , in Technical 08 April 2013 - * * * * * · 30,755 views
heat, capacity, ratio and 2 more...
Heat Capacity Ratio (κ) Compilation From Hysys At Real Conditions Heat Capacity Ratio or Specific Heat Ratio has been discussed in many posts on "Cheresources". The heat capacity ratio is used for head calculations of compressors and for orifice sizing calculations for gas flow through control valves, relief valves and restriction orifices. Thus the importance of accurate value of the heat capacity ratio cannot be overe...



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Material Storage Considerations As Per Gpsa Engineering Databook

Posted by ankur2061 , in Technical 21 March 2013 - - - - - - · 7,833 views
gpsa, material, storage and 2 more...
Material Storage Considerations As Per Gpsa Engineering Databook A lot of queries on the forum relate to storage of materials like crude oil, gas condensate, natural gas liquids, butanes, propanes, natural gasoline, petrochemicals (butadiene), natural gas, LNG. A variety of answers are provided to these queries with many quoting from outdated books and standards (some quotes relate to books from the 50s). I h...



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Calculating Physical Properties Of Slurries

Posted by ankur2061 , in Technical 15 March 2013 - * * * - - · 132,338 views

Calculating Physical Properties Of Slurries Today's blog entry addresses how to calculate the physical properties of slurries. Before we go into the details let us understand the basic concept of a slurry.
 
A slurry consists of solid particles suspended in a liquid. A slurry pipeline is used to transport slurries from the source such as a coal mine to its destination such as a coal power plan...



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Firefighting Foam Demand Calculations

Posted by ankur2061 , in Technical 21 February 2013 - * * * * * · 157,022 views
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Firefighting Foam Demand Calculations I had mentioned in one of my earlier blog entries that off-late I have developed an interest in learning about HSE and in particular about Loss Prevention. The blog entry subject was "Fixed Water Spray Demand Calculations for Fire Protection of Tanks / Vessels" and its link can be found at:  http://www.cheresour...4/entry-283-...



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Gpsa Engineering Databook, 13Th Edition, Si Units

Posted by ankur2061 , in Technical 08 February 2013 - * * * * * · 53,839 views
gpsa, engineering, databook, gas and 1 more...
Gpsa Engineering Databook, 13Th Edition, Si Units I recently bought the GPSA Engineering databook, 13th Edition, SI units. I haven't had the opportunity to study it in its entirety, but prima facie it appears to be a good investment. In fact, a long pending development related to an excel workbook for sizing of molecular sieve beds for Natural Gas Dehydration was held up due to insufficient information i...



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Dissolved Oxygen Scavenger Dosing Calculations For Water Treatment

Posted by ankur2061 , in Technical 26 January 2013 - * * * * - · 61,841 views
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Dissolved Oxygen Scavenger Dosing Calculations For Water Treatment Oxygen scavengers are dosed in water where even the smallest amount of oxygen can cause corrosion to the system which could include piping and equipment made of commonly used materials of construction such as carbon steel .

Beside the well-known application of treating Boiler Feed Water (BFW) with oxygen scavengers there are other applications which may...



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Comparison Of Turbine With Positive Displacement Meters For Custody Transfer

Posted by ankur2061 , in Technical 20 January 2013 - - - - - - · 24,271 views
turbine, flowmeter, positive and 1 more...
Comparison Of Turbine With Positive Displacement Meters For Custody Transfer Positive displacement (PDM) and turbine (TMs) are the two types of flowmeters acceptable as primary measurement instruments for custody transfer of liquid petroleum products.

TMs use a bladed rotor contained in a flow tube that is axially suspended in the...



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Minimum Safe Recyle Process Flow Schemes For Centrifugal Pumps

Posted by ankur2061 , in Technical 01 January 2013 - * * * * * · 23,271 views
minimum, safe, recycle, process and 2 more...
Minimum Safe Recyle Process Flow Schemes For Centrifugal Pumps On the eve of the new year designated as 2013 as per the Gregorian calendar, I wish the members and readers of "Cheresources" a very happy and prosperous new year. Before moving on to the topic at hand, I wish to express my sincere thanks to Chris Haslego and Art Montemayor for providing this wonderful gift of "Cheresources" to the...



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Heat Flux And Maximum Film Temperature For Fired Heaters

Posted by ankur2061 , in Technical 18 December 2012 - * * * * * · 35,079 views
fired, heater, heat, flux, film and 1 more...
Heat Flux And Maximum Film Temperature For Fired Heaters Today I was going through some write-up related to fired heaters from old manuals of a world-class operations company and found some very good information related to "Heat Flux" and "Maximum Film Temperature" for fired heaters used in various services. Although process design engineers working for general engineering consulting firms...



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