I'm looking for some references on heat tracing control. Ie turning it on /off based on flow, temperature, etc.

Regards,

Mark

 

Mark:
A few sites to check are:
www.mychromalox.com
www.nelsonheaters.com
www.thermon.com
www.heat-trace.ltd.uk
As with most designs the work up front is important. Take into account the materials.
What is the product in the pipe?
What is the flow rate?
Pipe selection?
Ambient temperature as well as the product temperature (delta T).

The base equations:

Q= F*Cp*(deltaT)*SF/3412 Btu/kW

Q=Power in Kilowatts
F =Flow rate in lbs./hr
Cp= Specific heat in Btu/lb/degF
delta T= Temperature rise in degrees F
SF = Safety Factor

Definitely consider losses to the environment.
Typically the temperature is monitored, however flow is taken into account.

Consider the project individually. For example 1 mile length of pipe versus a tank. Power segments, Application of the heat tape for purposes of installation as well as maintenance.

Hope this is a reasonable beginning.
Regards, Paul Dackermann

 

Mark,

Another site you wish to look at is
http://www.wirexcontrols.com

On it you will find a link to Nextron temperature controllers for both single point and multi point applications.

We are a stocking distributor for this product line and would be happy to assist you in any application you may have.

Regards<
D.Joy

 

Look here for specific information on Heat Tracing Control and Monitoring Systems:
http://www.tycothermal.com/northamerica/english/heating/products.asp?can=1001&pt=appl&aid=42

This should cover everything from mechanical on/off controls through software based control and monitoring software solutions.