FIELD: internal combustion engines.
SUBSTANCE: heat exchanger (52) which may be used in an engine, such as a vehicle engine for an aircraft or orbital launch vehicle is provided. Heat exchanger (52) may be configured as substantially drum-shaped with a plurality of spiral sections (108), each containing numerous small diameter tubes (120). Spiral sections may spiral inside one another. Heat exchanger may include a support structure with a plurality of mutually axially spaced hoop supports, and may incorporate intermediate header (440).
EFFECT: heat exchanger may incorporate recycling of methanol or other antifreeze used to prevent blocking of the heat exchanger due to frost or ice formation.
114 cl, 60 dwg
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