Thermal System

As built CAD

EmilyJack2 — Tue, 06 Jul 2010 21:55:45 GMT

Propulsion line heaters

sullivan.eric@orbital.com — Fri, 02 Apr 2010 12:38:30 GMT

I need spiral wrapped kapton heaters for propulsion lines. I need each tape to contain 3 elements. What I need to know is the allowable resistance range (per prop line length) so i can determine which tapes are in series/parallel.

HELP!!

BK4 Shrink Band Outgassing Properties

andrewfiles — Mon, 30 Nov 2009 18:55:53 GMT

Hello,

I was wondering if someone could tell me the specific material that is used in the BK4 Kapton Shrink band. I am trying to find the outgassing properties to see if they meet the requirements for a space vehicle application.

Thank you!

Calculating Temperature rise in CuNi

steven.rines@miltope.com — Sun, 11 Jan 2009 16:51:50 GMT

Hi!

I am designing a flex circuit to sit between fields of neodymium magnets. The circuit will be attracted/repelled by the magnets based on changes in voltage applied to the flex circuit. I have designed the trace layout to take advantage of the flux fields of the magnets. The circuit requires a minimum trace resistance to match the impedance of the operational amplifier. I intend to use CuNi as the trace material to achieve the necessary resistance. At the moment I defined a 2.7 meter trace of 1 mil CuNi 2.7mm wide to achieve the requisite resistance (15 ohms). The flex circuit is a double-sided circular disk 80mm across, in a circular frame but moving axially in the open air. How do I determine the temperature rise of the flex circuit based on voltage/current in? My goal is no more than 45deg temp rise at 150W.

--Steve

need help with a small water heating system

winter — Sun, 14 Oct 2007 01:31:01 GMT

Hey everyone, i'm new to these forums and i have a query about a compact water heating system.

this system will be heating a small chamber that holds about 1 litre of water. i need to keep the temp. around 120-140F degrees and i also need to power it off of a 12v system I.E. car battery or small 12v dry cell.

also, what would you recommend for a voltage/amperage control that way when the water isn't needed, it can be regulated and kept at about 45F degrees to resist agenst freezing?

i was thinking of a simple wire/coil settup, direct from the battery, loop it around a few times submerged in the water and then right back to the battery again. the materl of use would be stainless steel to protect agenst rust. also need a way to regulate agenst too much voltage being this is settup inside of a car and the battery would be relayed to the alternator so that it may be recharged at the same time as it's being used.

any help would be GREAT!
thanks!
Jay

heating in a -55C ambient

deukalion — Mon, 10 Sep 2007 12:58:09 GMT

I need to heat a pcb in a -55C ambient to -40C and to keep it at that temperature. I think to use a controller but I don't know that I can find a controller which can operate at -55C or are there any other way to do this. The dimension of the control system is also a problem for me. I will be glad, if anyone enlighten me about this topic.
thank you.

Constant temperature for an optical system

Cadman — Wed, 13 Jun 2007 17:58:09 GMT

I'm designing part of an optical system to fly on our airplane that needs to stay at a constant temperture. I'm a nutsand bolts and machined parts kinda guy and I don't have the first clue about what I need for heater, sensor or controller. Where do I start?

Thanks.

Maintain the temperature of an LCD Display

iacopo sensi — Fri, 01 Jun 2007 07:59:41 GMT

Thank you for answers. How can I order a custom Thermal Clear Heater?

Maintain the temperature of an LCD Display

iacopo sensi — Thu, 31 May 2007 08:46:26 GMT

I need to maintain the temperature of an LCD Display at -20°C. The initial temperature is -40°C.
Dimensions of LCD are
Width=55.8mm
Height=14.73mm
Thikness=2mmm

What my options are for a heater?
Thanks

Pt100 for cylindrical accomodation

Philippe Cesari — Thu, 25 Jan 2007 10:05:19 GMT

I am looking for thermal sensors type Pt100 for space application. These pt100 shall be equipped with 3 wires.
My problem concerns in fact the mechanical interface of area where temperature shall be measured. This area is the external surface of a stainless steel pipe with diameter 5 mm and length max 10 mm.
In the past, for this application, we bougth Minco thermal ribbons sensors (model S651) but due to the interface (flat surface glued on cylindrical surface) and the stresses in the wires routing, more than 50 % of the sensors broke during vibration tests simulating the rocket launch. What I am looking for is:
A Pt100 / 3 wires sensor equipped with larger Kapton foil which can be bent with radius of curvature down to 5 mm.
A stress relief system which permit on each sensor, to avoid the removal of the wires due to high vibrations.

Thanks for your help!!!!!

Temperature control of a battery pack

ismail — Wed, 29 Nov 2006 09:57:37 GMT

I want to maintain the temperature of a battery pack between 0 C and 20 C. The battery pack is enclosed in a housing of aluminum.The heating and cooling is assumed to occur due to radiation heat transfer. The batteries have there own dissipation when they are charging and discharging. The problem is how to manage the high heat dissipation and temperature

Cold Resistances and In-Rush Currents

geebd — Tue, 11 Apr 2006 17:02:38 GMT

I am currently using MINCO polymide heater and was wondering if there is any data on "in-rush currents" and/or "cold resitances"? For instance when power is first applied to a motor (I know its an inductive load, not resistive like a heater) there is "In-rush current" that is usually on the order of 5x the steady-state current. The "in-rush current" can be calculated by using the motor's cold/off state electrical chracteristics. My question is are there simliar "in-rush currents" associated with banging a polymide heater on and off in a -55C environment?

AS9100

Smith21 — Fri, 19 Aug 2005 16:59:14 GMT

Does anyone have any good resources to get reliable info on AS9100?

Kapton

ski forever — Tue, 12 Apr 2005 20:36:09 GMT

Why does Kapton have a bad reputation in the aerospace industry? I have an end user who is uncertain about using Kapton heaters and sensors. Are his concerns justified?

Maintain the temp.

jthompson — Mon, 04 Apr 2005 15:32:27 GMT

I need to maintain the temperature of a ruggedized monitor at 230 degrees C. Does anybody know what my options are for a heater?

Heater Specifications

Smith21 — Wed, 06 Apr 2005 18:58:32 GMT

I need a way to heat the batteries on an unmanned spacecraft, I have investigated flexible heating circuits as a way to heat these and was told that I should order per the specification GSFC S311-P-079. What does this specification entail? Where can I get heaters per this specification?

Lead Times

Smith21 — Wed, 06 Apr 2005 18:53:41 GMT

I am looking for a small quantity of heaters for a commercial satellite computer system. I have been quoted a couple of custom heaters that are NASA tested and approved for spaceflight, but the lead time is fairly long, is there any way to get a heater that is NASA tested much more quickly?