« Two Pole DC Rail Voltage Decoupler - John Dunn, Consultant, Ambertec, P.E., P.C. | Main | A Short Story for Managers »

January 28, 2012

Comments

david pacholok

Carl:
Since they have an ICE on board, it might make sense to use some of its waste heat to increase the temp/pressure of the working fluid, pressurized air to acheive a "free" increase in the energy content thereof. If a cycle first pressurizes "cold" air (adiabatic heating to 5000 PSI is not practical with present materials - they would melt - heat must be dissipated between compressor stages)and then uses scrap stored heat to increase/maintain pressure as compressed air is used later in the cycle an increase in eff may well result.
I cannot think of a way to do this inexpensively, however.

Howard Edelman

Internal combustion is an air compressor/motor where instead of adding air under pressure at the right moment, some fuel mixed in with the air is ignited to add temperature at the right moment. PV=NRT still works.

BTW What kind of ice are you referring to.

Carl Schwab

Comment to David P.--
In thermodynamics, an adiabatic process or an isocaloric process is a thermodynamic process in which the net heat transfer to or from the working fluid is zero. Such a process can occur if the container of the system has thermally-insulated walls or the process happens in an extremely short time, so that there is no opportunity for significant heat exchange. I think the isocaloric is a better term to describe what I thought Tata had to solve to make a practical hybrid.
There are some attractive features. ----Carl Schwab

value garage equipment

There are hand-powered air compressors, but most are powered by either electricity or natural gas. Natural gas air compressors usually are more cost effective. If the air compressor is used in a small, enclosed area, however, an electric model might be more desirable in order to avoid gas fumes.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been saved. Comments are moderated and will not appear until approved by the author. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Comments are moderated, and will not appear until the author has approved them.

Your Information

(Name and email address are required. Email address will not be displayed with the comment.)

Editor

  Learn about our  

 free engineering 

consulting referral 

      service at:

 

  IEEE Consultant's 

      Network of 

     Long Island

 

We have over forty 

electrical, electronic, 

mechanical and 

software engineers 

with expertise in more 

than sixty-five categories 

of technology and business. 

All are members of the 

IEEE and adhere to the 

IEEE professional codes 

of ethics. 

No fee is charged for the

referral service. 

Each member is an 

independent consultant 

and negotiates his/her 

own consulting agreement.

 

Editor: Jerry Brown

Contributors:

John Dunn

Marty Kanner

Murray Kleiner

Dick LaRosa

David Pinkowitz

Carl Schwab

Gerry Bodner

Larry Rachman

 

Unless otherwise noted, 

reprinting or republication 

of anarticle on this blog is 

authorized by crediting the 

author and prominently 

displaying the following 

sentence at the beginning 

or end of the article,

including the hyperlink to

IEEE Consultant's Network 

of Long Island


"This report is republished 

with permission of IEEE 

Consultant's Network of 

Long Island"

 

Pages

Blog powered by Typepad

Enter your email address:

Delivered by FeedBurner