| 摘要 |
The heat exchanger disclosed herein includes a head section and a heat exchanging section. The heat exchanging section consists of a bundle of inner conduits, open at both ends, and a bundle of outer conduits, open only at one end. The outer conduits enclose that part of the inner conduits within the heat exchanging section, such that an annular space is defined between the conduits. In operation, a lower temperature fluid is introduced into the head section, which generally operates at low temperature and high pressure. The lower temperature fluid flows through the inner conduits into the heat exchanging section and returns to the head section through the annular spaces between the inner and outer conduits. The high temperature fluid flows through the heat exchanging section in intimate contact with the conduits containing the lower temperature fluid, so that it is cooled by the lower temperature fluid. The head section of the heat exchanger is protected against the high temperatures in the heat exchanging section by a temperature adjustment zone, which thermally separates the head and heat exchanging sections.
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