Coiled Tubular Heat Exchangers
The development of the coiled tubular heat exchangers (CTHE) is closely related to the development of cryogenic technology. The first commerical liquefaction of air, made in 1895 by von Linde  in Germany and shortly thereafter by Hampson  in England, was achieved by the use of two types of coiled tubular exchangers. The first Linde exchanger consisted essentially of a long, helically wound concentric tube. Figure 1 shows a reproduction of the first Linde design of 1896 for an apparatus for the continuous production of “oxygen-rich air.” In this design, compressed air was divided into two streams and cooled in separate countercurrent coiled tubular heat exchangers with a low-pressure oxygen-rich stream O+ and a low-pressure nitrogen-rich stream N+, obtained by partial condensation of air. Various improvements to this heat exchanger type have since been built. Obviously, this design gives true counterflow, but relatively poor overall heat transfer coefficients due to channel flow on the low-pressure side.
KeywordsHeat Transfer Heat Transfer Coefficient Heat Exchanger Heat Transfer Surface Straight Tube
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- 1.C. Linde, German Patent No. 88824.Google Scholar
- 2.W. Hampson, British Patent No. 10156.Google Scholar
- 3.H. Glaser, VDI Zeitschrift, Beihefte Verfahrenstechnik, (4): 112 (1938).Google Scholar
- 4.E. R. G. Eckert, Heat and Mass Transfer, McGraw-Hill, New York (1963), p. 162.Google Scholar
- 5.E. D. Grimison, Trans. ASME, 59: 583 (1937).Google Scholar
- 6.E. F. Schmidt, Ph.D. Dissertation, T. H. Braunschweig, Braunschweig, Germany (1965).Google Scholar
- 9.H. Hausen, Wärmeübertragung im Gegenstrom, Gleichstrom und Kreuzstrom, Springer Verlag, Berlin, Germany (1950).Google Scholar
- 14.W. M. Kays and A. L. London, Compact Heat Exchangers, McGraw-Hill, New York (1958).Google Scholar