[AR] Re: OT Nozzle shapes
- From: Keith Henson <hkeithhenson@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Wed, 13 Nov 2013 06:17:45 -0800
On Wed, Nov 13, 2013 at 12:49 AM, Uwe Klein <uwe@xxxxxxxxxxxxxxxxxxx> wrote:
> Keith Henson wrote:
>>
>> I have a fairly bizarre problem. Need to get rid of 3 GW of waste
>> heat from lasers in orbit. The pump diodes use a total flow of 60
>> cubic meters per second at 22 deg C inlet and 34 deg C outlet.
>
> Take the working temperature further down ? ( increases efficiency )
The laser efficiency goes up as you take the working temperature down,
but not much.
> look into other coolants that are lighter and have less viscosity?
It's hard to beat water
> wild shot:
> find a way to compress (centrifuge ? ) the evaporated coolant
> to higher temperatures, radiate away the heat ...
this is a possibility. It gets tricky not just because of the extra
energy needed to pump the heat uphill, but because the radiator walls
must be thicker to take the higher pressure.
Keith
> uwe
>
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