Dear Mr. Agarwal,

I will be very grateful to you if you could send me your article.

My email ID is "amarfabricators@yahoo.co.in"

Vikesh Patel

Exe. Engineer

AMAR FABRICATORS & ENGINEERS

Cell: ++91-98250 40848 ■

Dear Mr. Agarwal,

I will be very grateful to you if you could send me your article.

My email ID is "amarfabricators@yahoo.co.in"

Vikesh Patel

Exe. Engineer

AMAR FABRICATORS & ENGINEERS

Cell: ++91-98250 40848 ■

Dear Amrit,

Thank you very much for sending me this article. Though I have gone through it superficially, it has cleared many of my aspects related to this topic.

I hope I will be back to you as soon as I spend some quality time with this article.

Thanks once again. ■

Dear Amrit,

Thank you very much for sending me this article. Though I have gone through it superficially, it has cleared many of my aspects related to this topic.

I hope I will be back to you as soon as I spend some quality time with this article.

Thanks once again. ■

Dear Mr. Amit Agrawal,

We received your article.

This article is through and up to the full depth of knowledge required to design pneumatic conveyor.

It has enhanced my workability in the field of dilute phase pneumatic conveying.

Thanks for providing such a knowledgeable article at complementary.

Regards,

Vikesh Patel,

Exe. Engineer,

Amar Fabricators & Engineers,

India ■

Dear Mr. Amit Agrawal,

We received your article.

This article is through and up to the full depth of knowledge required to design pneumatic conveyor.

It has enhanced my workability in the field of dilute phase pneumatic conveying.

Thanks for providing such a knowledgeable article at complementary.

Regards,

Vikesh Patel,

Exe. Engineer,

Amar Fabricators & Engineers,

India ■

Dear Mr. Agarwal,

I will be very grateful to you if you could send me your article.

My email ID is "natthapong.p@cemtech.co.th" ■

Dear Mr. Agarwal,

I will be very grateful to you if you could send me your article.

My email ID is "natthapong.p@cemtech.co.th" ■

Mr. Agarwal,

As a new engineer tasked with this topic as an introductory project, I would be very grateful if you could send me your article. After reading many of the posts, it seems to be very helpful. Thank you in advance for your time and expertise.

smullenberg@gmail.com

S. Mullenberg

Process Engineer ■

Mr. Agarwal,

As a new engineer tasked with this topic as an introductory project, I would be very grateful if you could send me your article. After reading many of the posts, it seems to be very helpful. Thank you in advance for your time and expertise.

smullenberg@gmail.com

S. Mullenberg

Process Engineer ■

Respected Sir kindly send me your article..my email id is

abhi.nitjsr03@gmail.com ■

Respected Sir kindly send me your article..my email id is

abhi.nitjsr03@gmail.com ■

Originally Posted by Amrit Agarwal

My article "Theory and Design of Dilute Phase Pneumatic Conveying Systems" was published this month in Powder Handling and Processing magazine. This article gives an easy to use Excel-based calculation method for designing new dilute phase pneumatic conveying systems or for improving the performance of existing conveying systems.

Regards,

Amrit T. Agarwal

Consulting Engineer

Pneumatic Conveying Consulting Services

Email: polypcc@aol.com

Ph and Fax: 304 346 5125

Dear Mr. Amrit

we would like to evaluate and redesign our air slide.

Would you please send your article to me

Our email yantdar@gmail.com

thks & rgds

Daryanto

Process Engineer ■

Originally Posted by Amrit Agarwal

My article "Theory and Design of Dilute Phase Pneumatic Conveying Systems" was published this month in Powder Handling and Processing magazine. This article gives an easy to use Excel-based calculation method for designing new dilute phase pneumatic conveying systems or for improving the performance of existing conveying systems.

Regards,

Amrit T. Agarwal

Consulting Engineer

Pneumatic Conveying Consulting Services

Email: polypcc@aol.com

Ph and Fax: 304 346 5125

Dear Mr. Amrit

we would like to evaluate and redesign our air slide.

Would you please send your article to me

Our email yantdar@gmail.com

thks & rgds

Daryanto

Process Engineer ■

Hi Amrit - thanks for the article. I managed to produce a very neat (my humble opinion) excel spreadsheet using your info - works a treat and is very usefull - much appreciated! ■

Hi Amrit - thanks for the article. I managed to produce a very neat (my humble opinion) excel spreadsheet using your info - works a treat and is very usefull - much appreciated! ■

Dear Mr. Amit Agrawal,

We received your article.

This article is knowledge required to design pneumatic conveyor.

Thanks for providing such a knowledgeable article at complementary.

Regards,Best Regards

Natthapong Piasai

Process Engineer

Cemtech Co., Ltd

Thailand

e-mail: natthapong.p@cemtech.co.th

Website: www.cemtech.co.th ■

Dear Mr. Amit Agrawal,

We received your article.

This article is knowledge required to design pneumatic conveyor.

Thanks for providing such a knowledgeable article at complementary.

Regards,Best Regards

Natthapong Piasai

Process Engineer

Cemtech Co., Ltd

Thailand

e-mail: natthapong.p@cemtech.co.th

Website: www.cemtech.co.th ■

thanks a lot sir..your theory is really helpful ■

thanks a lot sir..your theory is really helpful ■

Dear Amrit

Could you send me a copy of this article?

My e-mail is manavellaalexis@argentina.com

Best regards

Alexis ■

Dear Amrit

Could you send me a copy of this article?

My e-mail is manavellaalexis@argentina.com

Best regards

Alexis ■

Kindly send me Design sheet

kdulani@gmail.com ■

Kindly send me Design sheet

kdulani@gmail.com ■

Dear Amrit

Could you send me a copy of your article and excel spreadsheet

My e-mail is tlitherland@enpro-tech.com

Best regards

Troy ■

Dear Amrit

Could you send me a copy of your article and excel spreadsheet

My e-mail is tlitherland@enpro-tech.com

Best regards

Troy ■

Hello Mr. Amrit,

I would like to read your article "Theory and Design of Dilute Phase Pneumatic Conveying Systems". Please email it to solidcad@shaw.ca

Much appreciate the effort.

Thank you kindly,

Elmar

Elmar ■

Hello Mr. Amrit,

I would like to read your article "Theory and Design of Dilute Phase Pneumatic Conveying Systems". Please email it to solidcad@shaw.ca

Much appreciate the effort.

Thank you kindly,

Elmar

Elmar ■

Can anybody give me the suggestion for the equation of calculation of pressure drop in pneumatic conveying of spherical granular material in horizontal pipe ?

I have used the Ergun equation but it gives higher pressure drop than the expected.

My Parameters:

Particle Diameter:- 3mm

Density of Fluid (Air) :- 1.2

Porosity:- 54.8%

Length of Pipe :- 1.5 m

Viscosity of Fluid (Air):- 1.8E-05

Superficial Velocity (Assumed):- 5m/s ■

Can anybody give me the suggestion for the equation of calculation of pressure drop in pneumatic conveying of spherical granular material in horizontal pipe ?

I have used the Ergun equation but it gives higher pressure drop than the expected.

My Parameters:

Particle Diameter:- 3mm

Density of Fluid (Air) :- 1.2

Porosity:- 54.8%

Length of Pipe :- 1.5 m

Viscosity of Fluid (Air):- 1.8E-05

Superficial Velocity (Assumed):- 5m/s ■

Dear Amrit

Could you send me a copy of this article?

My email ID is safarivanz@yahoo.com ■

Dear Amrit

Could you send me a copy of this article?

My email ID is safarivanz@yahoo.com ■

Dear priteshkpatel,

Are you sure that the Ergun equation is applicable for pneumatic conveying?

This equation is for a flow through a packed bed.

For pneumatic conveying see the following links:

Pneumatic conveying, Performance and Calculations:

https://news.bulk-online.com/?p=65

Dense phase- or dilute phase pneumatic conveying:

https://news.bulk-online.com/?p=238

Pneumatic conveying, turbo- or positive displacement air mover:

https://news.bulk-online.com/?p=309

Energy consumption per ton of a pneumatic conveying system:

https://news.bulk-online.com/?p=331

Pneumatic conveying, an unexpected relationship.

https://news.bulk-online.com/?p=445

Success

Teus ■

Dear priteshkpatel,

Are you sure that the Ergun equation is applicable for pneumatic conveying?

This equation is for a flow through a packed bed.

For pneumatic conveying see the following links:

Pneumatic conveying, Performance and Calculations:

https://news.bulk-online.com/?p=65

Dense phase- or dilute phase pneumatic conveying:

https://news.bulk-online.com/?p=238

Pneumatic conveying, turbo- or positive displacement air mover:

https://news.bulk-online.com/?p=309

Energy consumption per ton of a pneumatic conveying system:

https://news.bulk-online.com/?p=331

Pneumatic conveying, an unexpected relationship.

https://news.bulk-online.com/?p=445

Success

Teus ■

Hi Teus !

Do you have time to discuss with me online ?

I got the direction through the links which you gave, but still I could not get the expected answer.

If you can help me then we can chat on yahoo, my ID is safarivanz@yahoo.com

Greetings,

Pritesh Patel

+49 176 64634215 ■

Hi Teus !

Do you have time to discuss with me online ?

I got the direction through the links which you gave, but still I could not get the expected answer.

If you can help me then we can chat on yahoo, my ID is safarivanz@yahoo.com

Greetings,

Pritesh Patel

+49 176 64634215 ■

Dear Pritesh Patel

I do have time to discuss, however, I do not have a Yahoo ID.

If you send me a private message through the forum, we can discuss via e-mail.

From the phone number, I understand that you are located in Germany.

Dann können wir uns auch auf Deutsch unterhalten.

A calculation for a pneumatic conveying installation of only 1.5 m long will not be accurate, because the main pressure drop is caused by acceleration.

Any additional pressure drops, which would be normally small compared to the maximum pressure drop in a long conveying line, then become significant.

BR

Teus ■

Dear Pritesh Patel

I do have time to discuss, however, I do not have a Yahoo ID.

If you send me a private message through the forum, we can discuss via e-mail.

From the phone number, I understand that you are located in Germany.

Dann können wir uns auch auf Deutsch unterhalten.

A calculation for a pneumatic conveying installation of only 1.5 m long will not be accurate, because the main pressure drop is caused by acceleration.

Any additional pressure drops, which would be normally small compared to the maximum pressure drop in a long conveying line, then become significant.

BR

Teus ■

Dear Teus,

I have used this book and on the page 232-233. I could find the equation for the calculation of pressure drop. Through that I could find expected pressure drop.

href="http://books.google.com/books?id=wnFRVrZAwUC&printsec=frontcover&dq=Pneumatic+Conveying+of+Solids#v=onepage&q=&f=false" target="blank">http://books.google.com/books?id=wnF...age&q=&f=false

The equation is as follows,

Delta P = [fri.factor(fluid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)/2*Dia(pipe)*gravity]

+

[fri.factor(solid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)*solid loading ratio/2*Dia(pipe)*gravity]

But still I am confused about the exact value of gas(air) friction factor and loading ratio.

Here, I have attached one paper which is quite similar to my topic, from which I have used the Ergen equation (Equation no.5) for the calculation of pressure drop.

Attachments

bs207_lecreps1 (PDF)

■

Dear Teus,

I have used this book and on the page 232-233. I could find the equation for the calculation of pressure drop. Through that I could find expected pressure drop.

href="http://books.google.com/books?id=wnFRVrZAwUC&printsec=frontcover&dq=Pneumatic+Conveying+of+Solids#v=onepage&q=&f=false" target="blank">http://books.google.com/books?id=wnF...age&q=&f=false

The equation is as follows,

Delta P = [fri.factor(fluid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)/2*Dia(pipe)*gravity]

+

[fri.factor(solid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)*solid loading ratio/2*Dia(pipe)*gravity]

But still I am confused about the exact value of gas(air) friction factor and loading ratio.

Here, I have attached one paper which is quite similar to my topic, from which I have used the Ergen equation (Equation no.5) for the calculation of pressure drop.

Attachments

bs207_lecreps1 (PDF)

■

Dear Pritesh Patel,

The equation you give,

“

Delta P = [fri.factor(fluid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)/2*Dia(pipe)*gravity]

+

[fri.factor(solid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)*solid loading ratio/2*Dia(pipe)*gravity]

“

is the summation of the gas only pressure drop plus the product loss pressure drop as a factor times the gas only pressure drop and proportional to the Solids Loading Ratio.

The SLR is defined as:

(mass flow of material)/(mass flow of gas) in f.i (kgs material/sec)/(kgs air/sec)

The above equation does not account for keeping the material in suspension, accelerating the material and elevating. This shortcoming cannot be incorporated in the fri.factor(solid), as these conditions vary widely for different installations.

Neither the material velocity (or slip velocity) is accounted for.

The slip velocity is depending on the suspension velocity of the material particles and the material loss factor.

The value of gas(air) friction factor is the fanning factor, which can be calculated by the

Swamee-Jain equation.

The formula, which you used is for Horizontal Low Velocity Slug Flow and not for dense- or dilute pneumatic conveying.

The research in pneumatic conveying has revealed many important phenomena, however, it never resulted in a uniform mathematical approach and easy, flexible to use calculation program (apart from some simple spreadsheets) that showed a transparent output.

Therefore, it is not safe, just to pick an equation from a book or article and apply that formula to your own situation.

It is understandable that universities and research laboratories focus on the theory of pneumatic conveying, but the manufacturers must develop working calculation programs that are in conformity with practice.

However, those manufacturers keep that information to themselves for commercial reasons.

In this forum, many pneumatic conveying questions are put forward and I try to answer them in such a way that a discussion about the principles of pneumatic conveying would emerge.

The latter, unfortunately, is not really happening.

All the best

Teus ■

Dear Pritesh Patel,

The equation you give,

“

Delta P = [fri.factor(fluid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)/2*Dia(pipe)*gravity]

+

[fri.factor(solid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)*solid loading ratio/2*Dia(pipe)*gravity]

“

is the summation of the gas only pressure drop plus the product loss pressure drop as a factor times the gas only pressure drop and proportional to the Solids Loading Ratio.

The SLR is defined as:

(mass flow of material)/(mass flow of gas) in f.i (kgs material/sec)/(kgs air/sec)

The above equation does not account for keeping the material in suspension, accelerating the material and elevating. This shortcoming cannot be incorporated in the fri.factor(solid), as these conditions vary widely for different installations.

Neither the material velocity (or slip velocity) is accounted for.

The slip velocity is depending on the suspension velocity of the material particles and the material loss factor.

The value of gas(air) friction factor is the fanning factor, which can be calculated by the

Swamee-Jain equation.

The formula, which you used is for Horizontal Low Velocity Slug Flow and not for dense- or dilute pneumatic conveying.

The research in pneumatic conveying has revealed many important phenomena, however, it never resulted in a uniform mathematical approach and easy, flexible to use calculation program (apart from some simple spreadsheets) that showed a transparent output.

Therefore, it is not safe, just to pick an equation from a book or article and apply that formula to your own situation.

It is understandable that universities and research laboratories focus on the theory of pneumatic conveying, but the manufacturers must develop working calculation programs that are in conformity with practice.

However, those manufacturers keep that information to themselves for commercial reasons.

In this forum, many pneumatic conveying questions are put forward and I try to answer them in such a way that a discussion about the principles of pneumatic conveying would emerge.

The latter, unfortunately, is not really happening.

All the best

Teus ■

Dear Sir:

Can I have a copy of your valuable article and its spreadshet? Thanks.

Sincerely Yours,

YCWANG ■

Dear Sir:

Can I have a copy of your valuable article and its spreadshet? Thanks.

Sincerely Yours,

YCWANG ■

Originally Posted by Teus Tuinenburg

Dear Pritesh Patel,

The equation you give,

“

Delta P = [fri.factor(fluid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)/2*Dia(pipe)*gravity]

+

[fri.factor(solid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)*solid loading ratio/2*Dia(pipe)*gravity]

“

is the summation of the gas only pressure drop plus the product loss pressure drop as a factor times the gas only pressure drop and proportional to the Solids Loading Ratio.

The SLR is defined as:

(mass flow of material)/(mass flow of gas) in f.i (kgs material/sec)/(kgs air/sec)

The above equation does not account for keeping the material in suspension, accelerating the material and elevating. This shortcoming cannot be incorporated in the fri.factor(solid), as these conditions vary widely for different installations.

Neither the material velocity (or slip velocity) is accounted for.

The slip velocity is depending on the suspension velocity of the material particles and the material loss factor.

The value of gas(air) friction factor is the fanning factor, which can be calculated by the

Swamee-Jain equation.

The formula, which you used is for Horizontal Low Velocity Slug Flow and not for dense- or dilute pneumatic conveying.

The research in pneumatic conveying has revealed many important phenomena, however, it never resulted in a uniform mathematical approach and easy, flexible to use calculation program (apart from some simple spreadsheets) that showed a transparent output.

Therefore, it is not safe, just to pick an equation from a book or article and apply that formula to your own situation.

It is understandable that universities and research laboratories focus on the theory of pneumatic conveying, but the manufacturers must develop working calculation programs that are in conformity with practice.

However, those manufacturers keep that information to themselves for commercial reasons.

In this forum, many pneumatic conveying questions are put forward and I try to answer them in such a way that a discussion about the principles of pneumatic conveying would emerge.

The latter, unfortunately, is not really happening.

All the best

Teus

Dear Teus,

Thanx for your suggestion.

Can you suggest me any reliable equation from which I can find out pressure drop in my system ?

Regards,

Pritesh ■

Originally Posted by Teus Tuinenburg

Dear Pritesh Patel,

The equation you give,

“

Delta P = [fri.factor(fluid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)/2*Dia(pipe)*gravity]

+

[fri.factor(solid)*density(gas)*velocity(gas)*velocity(gas)*length(pipe)*solid loading ratio/2*Dia(pipe)*gravity]

“

is the summation of the gas only pressure drop plus the product loss pressure drop as a factor times the gas only pressure drop and proportional to the Solids Loading Ratio.

The SLR is defined as:

(mass flow of material)/(mass flow of gas) in f.i (kgs material/sec)/(kgs air/sec)

The above equation does not account for keeping the material in suspension, accelerating the material and elevating. This shortcoming cannot be incorporated in the fri.factor(solid), as these conditions vary widely for different installations.

Neither the material velocity (or slip velocity) is accounted for.

The slip velocity is depending on the suspension velocity of the material particles and the material loss factor.

The value of gas(air) friction factor is the fanning factor, which can be calculated by the

Swamee-Jain equation.

The formula, which you used is for Horizontal Low Velocity Slug Flow and not for dense- or dilute pneumatic conveying.

The research in pneumatic conveying has revealed many important phenomena, however, it never resulted in a uniform mathematical approach and easy, flexible to use calculation program (apart from some simple spreadsheets) that showed a transparent output.

Therefore, it is not safe, just to pick an equation from a book or article and apply that formula to your own situation.

It is understandable that universities and research laboratories focus on the theory of pneumatic conveying, but the manufacturers must develop working calculation programs that are in conformity with practice.

However, those manufacturers keep that information to themselves for commercial reasons.

In this forum, many pneumatic conveying questions are put forward and I try to answer them in such a way that a discussion about the principles of pneumatic conveying would emerge.

The latter, unfortunately, is not really happening.

All the best

Teus

Dear Teus,

Thanx for your suggestion.

Can you suggest me any reliable equation from which I can find out pressure drop in my system ?

Regards,

Pritesh ■