Advertisement
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Home Who's Online Today's Posts HP Calculator CompD Gift Shop Mark Forums Read
Go Back   Competition Diesel.Com - Bringing The BEST Together > The Starting Line > Competition Vehicle Build Tech > Injectables; Water, Meth, Nitrous, Ect.
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Closed Thread
 
Thread Tools
Old 07-13-2011, 02:34 AM   #61
Stygi

Name: Stygi
Title: Banned
Status: Not Here
Join Date: Jul 2011
Member`s Gallery
Posts: 11
Quote:
Originally Posted by awenthol View Post
Water in the cylinder = wasted energy (lose a lot of energy getting the water up to those very high combustion temps). So, the additional EGT reduction is generally coming at a performance cost, for said reason.
Please explain why WI does not reduce power (even without methanol). Thanks!
 
Old 07-14-2011, 10:29 AM   #62
awenthol
 
awenthol's Avatar

Name: awenthol
Title: Rookie
Status: Not Here
Join Date: Nov 2008
Member`s Gallery
Posts: 29
Quote:
Originally Posted by Stygi View Post
Please explain why WI does not reduce power (even without methanol). Thanks!
You're condensing the intake air enough that it out-weighs the additional energy loss in the cylinders (you'd have to compare brayton cycle vs. energy cost of water). That's why there's a fine line at which you are injecting too much water and hurting power.


To add...the specific heat capacity of water is 4.18 J/g°C (air is only 1 J/g°C). So, for a typical performance diesel, let's say we're running 100°F intake air and 1200°F exhaust (which isn't really a fair rep of in-cylinder temp, but I'm just making a point). That means, (including the energy of water vaporization, which you could argue it already is) we're looking at about 5 KJ/g (of energy from the fuel/diesel) to expand/energize the water in the cylinders. Compare this to the 0.6 KJ/g required by air, and you can see the difference.

Going back to Begle1's question...if you had a magic tool that pulled the water back out of the air just before the cylinders, you would see very significant increases in power and efficiency.
__________________
2009 Ram SLT RC LB 4x4 G56
2006 Ram Laramie QC SB 4x4 48RE
1994 Ram SLT RC LB 4x4 NV4500
 
Closed Thread

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 06:42 AM.

 


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2006 - 2024, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com