Previous in Forum: Inverter Current   Next in Forum: Burden on CT PT
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
11 comments
Rating: Comments: Nested
dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65

Selection Criteria and Sizing of Diesel Generator

08/22/2013 9:57 PM

Some time back, an anonymous member in CR4 Forum, asked or wanted to know WHAT ARE THE CRITERION FOR SELECTION or SIZING of A DIESEL GENERATOR CAPACITY.

I have also posted an answer for the topic and mentioned the Web-Link will be copied and posted here after retrieving from my Folders saved in my Archives.

Accordingly it is retrieved and the Web-Link is given below, which gives brief and clear details. I hope this serves the purpose for that Member and I am sure he will see this. This link is obtained from the main link, where more than 35 topics are given there,

http://cumminspower.com/en/technical/papers/

http://cumminspower.com/www/literature/technicalpapers/PT-7007-SizingGensets-en.pdf

Thanks,

DHAYANANDHAN.S
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Anonymous Poster #1
#1

Re: SELELECTION CRITERIA and SIZING of DIESEL GENERATOR

08/22/2013 10:32 PM

Use the search utility and you will find the post you are replying to.

If it was an anonymous OP, I doubt very much they will look.
Register to Reply
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#2

Re: SELELECTION CRITERIA and SIZING of DIESEL GENERATOR

08/23/2013 3:16 AM
__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#5
In reply to #2

Re: SELELECTION CRITERIA and SIZING of DIESEL GENERATOR

08/23/2013 11:25 PM

Dear Mr.PWSlack,

I enjoyed your response.

DHAYANANDHAN.S
Register to Reply
frankcorners
Associate

Join Date: Jan 2008
Location: Bangalore , India
Posts: 52
#3

Re: SELELECTION CRITERIA and SIZING of DIESEL GENERATOR

08/23/2013 3:30 AM

Good initiative

__________________
 Frank - Catch my statement if you can.
Register to Reply
dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#7
In reply to #3

Re: SELELECTION CRITERIA and SIZING of DIESEL GENERATOR

08/23/2013 11:28 PM

Dear Mr. frankcorners,

Thank you very much for your comment.

DHAYANANDHAN.S
Register to Reply
pnaban
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#4

Re: Selection Criteria and Sizing of Diesel Generator

08/23/2013 10:45 PM

When you select ratings of diesel engine(HP) & alternator(kVA @0.8 pf) for a DG set by how much should be the engine bigger than the alternator considering efficiency of transmission,losses,starting kVA/HP/pf,type of loads,duty(prime/continuous/standby),type of governor etc?.

__________________
 pnaban
Register to Reply
dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#6
In reply to #4

Re: Selection Criteria and Sizing of Diesel Generator

08/23/2013 11:27 PM

Dear Mr. pnaban,

You pl. open the first link, you will find answer as there are many topics including your topic.

Thanks,

DHAYANANDHAN.S
Register to Reply
pnaban
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#11
In reply to #6

Re: Selection Criteria and Sizing of Diesel Generator

08/27/2013 3:32 AM

They have mentioned about loads like UPS & fire pump and a software for others. I need literature of sizing for various types of load such as AC1,2,3.. & electric lift,rapid on/off load like pressure boosters using pressure switches. In BS 7671 I saw a worked example for estimating cable size for lift(escalator),for DG set similar method is needed.

__________________
 pnaban
Register to Reply
jonald
Commentator

Join Date: Sep 2009
Location: Singapore
Posts: 77
Good Answers: 1
#8

Re: Selection Criteria and Sizing of Diesel Generator

08/24/2013 9:06 AM

Can I ask a question?

If i have a generator of say 500kva pf 0.8lag = 400+j300 kva And my total load is 300kva pf .6 lag = 180 +j239 kva

The generator kw is higher than load kw likewise, generator kvar is higher than load kvar. Therefore the generator size is okay. The kw ang kvar of generator is sufficient for loads

But because the load is on 0.6pf lagging the generator will still fall to 0.6lagging causing failure as per thermal capability limit?

We cannot add capacitor in parallel with generator just to increase the power factor. Any solution? Thanks
Register to Reply
sivaa
Commentator

Join Date: Aug 2008
Posts: 82
#9

Re: Selection Criteria and Sizing of Diesel Generator

08/25/2013 12:22 PM

How about synchronous motor with leading p.f. !
Register to Reply
jonald
Commentator

Join Date: Sep 2009
Location: Singapore
Posts: 77
Good Answers: 1
#10
In reply to #9

Re: Selection Criteria and Sizing of Diesel Generator

08/27/2013 1:11 AM

It is not advisable and it is dangerous to correct the power factor of your generator.

Nobody can answer?

Ill give you a clue.. check the thermal capability curve again, the answer is there.
Register to Reply
Register to Reply
Have a Different Question?
11 comments

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); dhayanandhan (3); frankcorners (1); jonald (2); pnaban (2); PWSlack (1); sivaa (1)

Previous in Forum: Inverter Current   Next in Forum: Burden on CT PT

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (61 right now)
Show Members
Advertisement