PLAN Type 052C/052D Class Destroyers

Discussion in 'Navy' started by Jeff Head, Mar 14, 2014.

  1. Tam
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    Tam Senior Member
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    Using the total antenna area is incomplete, because the front part is only the surface area of one dimension, since you need to consider the total surface area of all three dimensions of the module. In fact, more cooling can be done and needs to be done on the middle or the back than on the front part, as this might place the module's amp. Another is that the modules transfer heat to the frame of the plank, and then the sub array frames. That's why the packaging is critical. And then the air can be cooled, and what temperature can the air be cooled and the environment can be thermostatically and variably be controlled. Each module can have heat sensors that can also switch the cooling systems on. We don't know about the efficiency of the cooling systems therein.
     
    #3121 Tam, Mar 16, 2019
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  2. Max Demian
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    Max Demian Junior Member
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    See my follow-up post where the module cross-section is taken into account.
     
  3. Tam
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    Tam Senior Member
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    Again, you are not considering the use of the air itself being cooled, even refrigerated, thermostatically controlled environments, packaging factors, the planks and subarrays.

    This might give a better idea what's behind the antenna. Also note the antenna as it is a notched type, which gives greater surface area than a plated type.

     
    #3123 Tam, Mar 16, 2019
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  4. Max Demian
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    Max Demian Junior Member
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    I encourage you then to come up with an alternative calculation of your own.

    I am trying to produce an estimate based on what is known or claimed (Wiki article). What you're suggesting sounds a lot like phase change cooling. But if it's more akin to air conditioning then that's fine.

    When I was younger, I did quite a bit of CPU overclocking, so I know that it's possible to go over 2kW/m2 with air-cooling when allowing for up to 70K increase over ambient. However, I was using 600g heatsinks (not including fan weight) to cool a 150mm2 chip embedded within a 1.4cm2 heatspreader LGA package. I don't think that would scale to something the size of a Type 346 :D

    Here's a nice article to start making further estimates along these lines: http://garglab.oucreate.com/wp-content/uploads/2017/08/SOP_package.pdf
     
    #3124 Max Demian, Mar 16, 2019
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  5. Max Demian
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    Max Demian Junior Member
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    Continuing post #3124

    Correction for heatspreader size: 14cm2 instead of 1.4 cm2 (actually a bit less, as the heatspreader doesn't cover the entire socket area).

    To continue on Tam's remarks, and to understand what is possible, an Arleigh Burke flight IIA has an equivalent of five 200 ton AC plants installed. According to this article: https://www.hpac.com/air-conditioning/chiller-plant-efficiency , peak power consumption is about 0.75kW per ton which comes out to 800kW for AC alone. Unknown how much of that can be dedicated to radar equipment cooling. For flight III, they are upping that to 1500 tons total equivalent AC mostly on account of needing to cool the new SPY-6 GaN AESA.
     
    #3125 Max Demian, Mar 16, 2019
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  6. Tam
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    Tam Senior Member
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    I found some pictures though its not the exact ones I remember. However, this kind of tubing is something I would associate more for liquid instead of air, and starting to make me question if the "air cooled" entry on Wiki is correct.

    Similar but the module is also transferring heat to the plank or sub array. The PC CPU does not transfer heat to the PC frame.

    Test ship 891 with Type 346, with exposed plumbing.

    1299066512_87699.jpg 891-346.jpg

    Author of this page thinks its water cooled. He wrote this back during early 2013.

    0061_vppilo_fg.png
     
    #3126 Tam, Mar 16, 2019
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  7. asif iqbal
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    asif iqbal Brigadier

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    overall 13 x Type 052D and 4 x Type 052DL total 17 in the water

    3 more under construction at DL and 4 at JNCX

    thats 24 units of Type 052D/L identified
     
  8. by78
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    by78 Colonel

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    High-resolution images of various 052C and 052D units of PLAN... Some of these are old, but I'm reposting them here due to Flickr losing a lot of my photos after it migrated servers...

    [​IMG]
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  9. by78
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    by78 Colonel

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  10. by78
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