Go Back   Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum > General Science Forums > Physics Forum
Register Search Today's Posts Mark Forums Read

Physics Forum Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.


Question about Converting Heat to Electricity

Question about Converting Heat to Electricity - Physics Forum

Question about Converting Heat to Electricity - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-26-2007, 07:17 PM
Doug Wedel
Guest
 
Posts: n/a
Default Question about Converting Heat to Electricity



My recent readings in geothermal energy have introduced me to the idea that
processes exist to extract heat from fluid at, say, 50 degrees Fahrenheit,
and then raise that temperature (through compression) to, say, 100 degrees
Fahrenheit to heat air in a building. Is there a thermodynamic reason why
the temperature could not be raised high enough to boil water and produce
steam? Can it possibly be efficient to produce electricty from heat in
fluid at temperatures below the boiling point of water? How does one talk
about this problem?


Reply With Quote
  #2  
Old 11-26-2007, 07:32 PM
dlzc
Guest
 
Posts: n/a
Default Question about Converting Heat to Electricity

Dear Doug Wedel:

On Nov 26, 12:17 pm, "Doug Wedel" <[Only registered users see links. ]> wrote:

Yes, it is called a "heat pump".


Efficiency. The bigger the temperature difference, the less efficient
the process is. Also, there will be selection of working fluids for
the compression process. You will need something that becomes liquid
somewhere near the low temperature sink.


If you have two temperature sinks, you can generate electricity while
"contaminating" one sink with heat from the other.


You are doing fine. However you may want to go to sci.engr.mech.

The field of study that you are embarking on is called
"thermodynamics". I'd recommend some college courses really soon.

David A. Smith
Reply With Quote
  #3  
Old 11-26-2007, 07:32 PM
dlzc
Guest
 
Posts: n/a
Default Question about Converting Heat to Electricity

Dear Doug Wedel:

On Nov 26, 12:17 pm, "Doug Wedel" <[Only registered users see links. ]> wrote:

Yes, it is called a "heat pump".


Efficiency. The bigger the temperature difference, the less efficient
the process is. Also, there will be selection of working fluids for
the compression process. You will need something that becomes liquid
somewhere near the low temperature sink.


If you have two temperature sinks, you can generate electricity while
"contaminating" one sink with heat from the other.


You are doing fine. However you may want to go to sci.engr.mech.

The field of study that you are embarking on is called
"thermodynamics". I'd recommend some college courses really soon.

David A. Smith
Reply With Quote
Reply

Tags
converting , electricity , heat , question


Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Question About Source of Heat in Crust of Earth Doug Wedel Physics Forum 6 11-26-2007 01:31 AM
Question About Source of Heat in Crust of Earth Doug Wedel Physics Forum 0 11-24-2007 11:39 PM
Question about relative efficiency of heat engines Doug Wedel Physics Forum 2 11-24-2007 05:30 PM
Question about relative efficiency of heat engines Doug Wedel Physics Forum 0 11-24-2007 04:23 PM
Question on heat measurement Adam Corolla Physics Forum 5 12-01-2005 11:08 PM


All times are GMT. The time now is 09:32 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright 2005 - 2012 Molecular Station | All Rights Reserved
Page generated in 0.12372 seconds with 16 queries