Design and Stress Analysis of Extraterrestrial ... - The Black Vault

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the additional surface depends on its geometric s!pe, the heat
conductivity of the material, and the method of jotning elements
to the main surface.
a, I
a) (a)c0(b
Fig. 4.25. Jacket-and-pipe heat exchangers with bent pipes:
a - with U-shaped pipes and a common pipe panel; b - with
U-shaped pipes and a U-shaped Jacker; c - with fl-shaped
pipes; d - with sinusoidal bend.
For this purpose there are installed longitudinal and lateral fins of
various shapes (Fig. 4.24b, 4.29) or pipe covers which increase the
path of the heat exchange agent in the interpipe space (in the first
case) or increase the rate of flow of the pipes with the heat carrier
of another loop.
In order to ensure the normal operation of a heat exchanger under
weightless conditions during space flight, devices for twisting the
heat carrier are found in
each tube.
All these measures in,'.rease the heat transfer coefficient and
reduce the size and weight of the heat exchanger.
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