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Ankur's_Chemical_Engg_Blog



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Celebrities Outside The Engineering And Science Field With Engineering And Science Degrees

Posted by ankur2061 , in Humor 04 May 2013 - - - - - - · 11,388 views
celebrity, engineers
Celebrities Outside The Engineering And Science Field With Engineering And Science Degrees For a change this is not a technical entry. It is more so for the sake of general knowledge and fun. There are quite a few celebrities who graduated as engineers but never chose to work in the engineering field. They chose the cinematic arts, music, politics and other diverse fields to excel and make a name for themself. Since this is a chemical engineeri...



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Theoretical Compressor Discharge Temperature Equations By Gpsa 13Th Edition

Posted by ankur2061 , in Technical 26 April 2013 - * * * * * · 70,809 views
compressor, discharge and 3 more...
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 - * * * * * · 27,578 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 - - - - - - · 7,359 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 - * * * - - · 118,625 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 - * * * * * · 60,357 views
fire, fighting, foam, demand and 1 more...
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 - * * * * * · 37,336 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 - * * * * - · 53,564 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 - - - - - - · 22,280 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 - * * * * * · 21,535 views
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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 - * * * * * · 31,006 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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Multiple Centrifugal Pumps In Series And Parallel

Posted by ankur2061 , in Technical 14 December 2012 - * * * * * · 77,825 views
centrifugal, pumps, parallel and 1 more...
Multiple Centrifugal Pumps In Series And Parallel For many young process engineers the concept of multiple centrifugal pumps in series or parallel is often confusing. Today's blog entry tries to explain the concept of centrifugal pumps in series and parallel.

First of all let us understand what it means by pumps in series and parallel.

When we say multiple pumps are in series, it means that the...



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Comparing Iso13709 / Api 610 With Ansi / Asme B73.1 Centrifugal Pumps

Posted by ankur2061 , in Technical 05 December 2012 - - - - - - · 51,894 views
centrifugal, pump, standards and 5 more...
Comparing Iso13709 / Api 610 With Ansi / Asme B73.1 Centrifugal Pumps I am not a rotating machinery specialist but a process engineer. Today's blog heading probably has more relevance to a rotating machinery specialist. Nevertheless, I felt that process engineers are also entitled to know the difference between these two distinct categories of centrifugal pumps used worldwide for a majority of pumping applications...



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Ejector Dry Air Equivalent (Dae) Calculations

Posted by ankur2061 , in Technical 22 November 2012 - - - - - - · 16,672 views
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Ejector Dry Air Equivalent (Dae) Calculations Ejectors have been discussed a lot on "Cheresources". In fact one of the most read posts on Cheresources relates to ejectors which also provides a workbook for ejectors by Art Montemayor the administrator of "Chereources" and a mentor to many of the younger generartion of chemical engineers. The link of that post is provided...



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Gas Hydrate Inhibitor Injection Calculations

Posted by ankur2061 , in Technical 19 October 2012 - * * * * * · 35,528 views
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Gas Hydrate Inhibitor Injection Calculations Gas Hydrate Inhibitor Injection has been discussed previously on "Cheresources" in several posts. Besides the fact that the "Hydrate Utility" in HYSYS can calculate inhibitor injection rates, there are other methods programmable in a simple excel sheet that can be utilized to provide fairly accurate inhibitor injection rates. Equations...



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Associated Gas Flashing Calculations From Gas / Oil Mixtures - Vasquez-Beggs Method

Posted by ankur2061 , in Technical 05 October 2012 - - - - - - · 19,278 views
gas, flashing, flash, calculation and 5 more...
Associated Gas Flashing Calculations From Gas / Oil Mixtures - Vasquez-Beggs Method Flashing calculations from crude oil -associated gas are mostly done using a simulation software such as HYSYS or UNISIM or any other. By flashing it is meant that a crude oil - associated gas mixture is reduced from a higher pressure to a lower pressure. An example of flashing would be to transfer an oil-gas mixture from an inlet separator to a storage...



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Comparing Liquid And Vapor Heat Transfer Fluid (Diphenyl:diphenyl Oxide) Systems

Posted by ankur2061 , in Technical 28 September 2012 - - - - - - · 14,282 views
heat, transfer, fluid, liquid and 3 more...
Comparing Liquid And Vapor Heat Transfer Fluid (Diphenyl:diphenyl Oxide) Systems I started my career in commissioning and operations of polyester (PET) polycondensation plants in 1985. Technologies I got exposed to during my career as an operations engineer included ICI / Monsanto (batch polycondensation), Inventa (continuous polycondensation), Zimmer (continuous polycondensation) and DuPont /Chemtex (continuous polycondensation).

One...



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Affinity Laws For Centrifugal Pumps As Applicable To Variable Frequency Drives

Posted by ankur2061 , in Technical 20 September 2012 - * * * * * · 17,516 views
affinity, laws, centrifugal and 4 more...
Affinity Laws For Centrifugal Pumps As Applicable To Variable Frequency Drives Variable Frequency Drives (VFDs) or Variable Speed Induction Motors are frequently used in many applications for flow control through centrifugal pumps. One common factor associated with VFDs used for centrifugal pumps is rapidly changing flow to meet the process requirements and power savings at turndown flow rates where an oversized motor will provide...



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Liquid Pipeline Surge

Posted by ankur2061 , in Technical 13 September 2012 - * * * * - · 22,323 views
liquid, pipe, line, pipeline and 1 more...
Liquid Pipeline Surge Pipeline Surge has been a hotly debated topic on "Cheresources". During one of these discussions I had said that I would try to compile a blog entry related to pipeline surge possibly with an excel workbook. Today's blog entry discusses pipeline surge sans the excel workbook. I expect the young process engineers to develop their own...



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Boil-Off Gas (Bog) Calculations For Cryogenic Liquefied Natural Gas Tanks

Posted by ankur2061 , in Technical 03 September 2012 - * * * * * · 68,931 views
boil, off, gas, calculations and 4 more...
Boil-Off Gas (Bog) Calculations For Cryogenic Liquefied Natural Gas Tanks Boil-off Gas has been discussed on "Cheresources" in several posts in the past.

Recently, I came across an article on Boil-off Gas from LNG tanks which I found to be quite interesting. Today's blog entry is related to boil-off gas calculations based on this article for cryogenic LNG storage tanks of some standard capacities such as 140,000,...



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