×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*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.

Students Click Here

Jobs

electrical heater
2

electrical heater

electrical heater

(OP)
Can anybody comment on the pros and cons of using open coil type & finned tubular heater.

thank you for any input

RE: electrical heater

Open Coil:
Pro:
Much cheaper
Could be easier to replace heating elements if required
Con:
-Only good for clean, dry air
-Heating elements may not last as long (particularly if clean, dry air is not supplied)
-During maintenance, energized elements can cause electrical shock

Fin-Tubbed:
Pro:
-Can be supplied with dirty or wet air
-Elements pose no electrical shock hazzard (but circuitry can; also, burn hazzard can exist)

Con:
-More expensive
-May or may not be as easy to replace damaged or burned-out elements

Could be more. These are off of the top of my head. As for the replacing of the elements goes, this will depened largely on the manufacturer and the overall design of the heater in question.

Ed

RE: electrical heater

Open coil=fast responce to control. High watt density. Say Hot,Hot,hot...Like radient.
Sheathed or fin coil heater have a lag to control. i.e. mass/inerta. Say drag...
Fin heaters have a great advantage where lots of heat is needed but low watt density (surface heat)is required.  
Sheath or finned are good in low pressure applications (altitude/vacuum) and humidity situations.
Humidity applications require very a good seal at terminations. One alternative is to have the seals/connections (terminals) outside the wet environment. Through the wall so to speak.

Good Luck

pennpoint

Best regards
pennpoint

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.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources