High temperature spiral sleeves

[Rajesh B]

Hi.

I want use high temperature spiral sleeves which should withstand around 300 deg C and I want wrap these sleeves around power cables which are passed in enclosure having thermal block and we will heat this block up to 400 deg C

Please suggest me how to overcome and suggest best suitable spiral sleeves.

Thank you

Rajesh

 

[Jeff Rosenbury]

What is the purpose of the sleeves? Are the power cables spirals?

My initial thought would be some sort of ceramic for temperature and and electric insulation (assuming you want those). However thermal expansion will make material choice critical.

They could be powder coated and sintered.

Another option would be some sort of fiberglass/fiberrock. This would give more flex, but less thermal conductivity.

 

[Windadct]

Sound similar to this - http://www.jegs.com/i/Taylor/895/2511/10002/-1?CAWELAID=1710641085&CAGPSPN=pla&catargetid=230006180000848396&cadevice=c&gclid=CjwKEAjw-IOwBRD1wrTC27fSjFISJABUDZ17evG0smxZJ4vL3xdlOjNyOzszwQKWrW7lFDhTG1U-ERoCdqjw_wcB

 

[berkeman]

Sound similar to this - http://www.jegs.com/i/Taylor/895/2511/10002/-1?CAWELAID=1710641085&CAGPSPN=pla&catargetid=230006180000848396&cadevice=c&gclid=CjwKEAjw-IOwBRD1wrTC27fSjFISJABUDZ17evG0smxZJ4vL3xdlOjNyOzszwQKWrW7lFDhTG1U-ERoCdqjw_wcB

Gotta love this part of the specs...

NHRA Approved

 

[Rajesh B]

What is the purpose of the sleeves? Are the power cables spirals?

My initial thought would be some sort of ceramic for temperature and and electric insulation (assuming you want those). However thermal expansion will make material choice critical.

They could be powder coated and sintered.

Another option would be some sort of fiberglass/fiberrock. This would give more flex, but less thermal conductivity.

The power cables are normal cables only and these cables will melt for around 100 deg C so I want to wrap these sleeves around these cables.

 

[Jeff Rosenbury]

The power cables are normal cables only and these cables will melt for around 100 deg C so I want to wrap these sleeves around these cables.

Wrapping the cables will likely not help. Power cables generate heat. So with heat from outside and heat from the cable, they will likely overheat. Thermal insulation will hurt, not help your problem. You might still need to insulate them for other reasons though.

In addition there are electrical considerations for any insulation.

It should be moderately easy to design a solution, but I suspect it will need to be designed. That means spending the money on an engineer.

My initial thought would be to use a higher temperature cable, perhaps a tungsten or titanium alloy? Aluminum melts at 660º C. But I don't know how it behaves at 400º C. It might work.

Another solution might be to use metal pipes as electrical conductors and run a cooling fluid inside. But I doubt that would be as cheap.