×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# C02 emissions from vessels using EPA's empirical relation

## C02 emissions from vessels using EPA's empirical relation

(OP)
I am trying to calculate the daily C02 emissions from a ship following this EPA report. Table 5-1 lists the C02 emission rate to be 44.1/(Fractional Load) + 648.6 in units of g/(kW-hr). Here are my questions,

1) What does the kW in the units represent? The ship engine's power output? My colleague has asked me to convert the units to kG/(Metric tons of fuel) per day. Multiplying by 24 will convert from hours to days, but how do I convert between kW and metric tons of fuel?
2) Are units of g/(kW-hr) standard for ship emissions?
3) For a container ship, Table 5-2 gives a cruising "load factor" of 80. I believe this means that the "fractional load" in the equation is 0.8 which gives 704 g/(kW-h) rather than 80 which gives 649 g/(kW-h). Is that correct (the report isn't clear)?

Thanks!

### RE: C02 emissions from vessels using EPA's empirical relation

Gen set manufacturers specify gallons of fuel consumption per KiloWattHour at several loadings. (Fuel density is specified.) This varies from engine to engine depending on the efficiency of the engine.
You may find something that you can use if you check the engine manufacturers specs.

Bill
--------------------
"Why not the best?"
Jimmy Carter

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!