8 / 9
А.И. Смородин, И.А. Фролов
8
Инженерный журнал: наука и инновации
# 6·2017
Heat transfer intensification inhelium plant assemblies
© A.I. Smorodin
1
, I.A. Frolov
2
1
Bauman Moscow State Technical University, Moscow, 105005, Russia
2
JSC NPO Geliymash, Moscow, 115280, Russia
Russian cryogenic helium plants feature helical-coil heat exchangers made of copper
tubes ribbed with copper wire, so that the heat exchanger surface becomes statistically
homogeneous. This structure the right conditions to distribute the flow evenly in the heat
exchange annulus. Low parallel flow pressure in KGU-5000/4,5 and a related decrease
in heat transfer coefficient in the annulus made us search for possible ways of intensify-
ing heat transfer in the pipe without increasing the size and mass of heat exchangers. We
analysed the works of R. Koch and E.K. Kalinin, which lead us to selecting intensifier
shape and dimensions so that they look like smoothly outlined ridges. Studies of four test
heat exchangers made of wire-ribbed tubes manufactured with and without intensifiers
confirmed the technological feasibility of producing a tube-based helical-coil heat ex-
changer out of tubes ribbed with wire, with internal intensifiers in the shape of smoothly
outlined ring-shaped ridges. We determined that the heat transfer coefficient inside tubes
with intensifiers is approximately twice as high as that in a smooth tube under compara-
ble conditions. We managed to decrease the size and dimensions of these heat exchangers
to install them in a large helium plant.
Keywords:
heat exchanger, tube, wire ribbing, heat transfer intensification, heat transfer
coefficient, ring-shaped diaphragm ridges, cryogenic helium plant, statistically homoge-
neous structure
REFERENCES
[1]
Krasnikova O.K.
Vitye teploobmennye apparaty kriogennykh i
teploenergeticheskikh ustanovok
[Helical-coil heat exchangers in cryogenic and
thermal engineering plants]. Moscow, KolosS Publ., 2008, 176 p.
[2]
Krasnikova O.K., Popov O.M., Udut V.N.
Khimicheskoe i neftegazovoe
mashinostroenie — Chemical and Petroleum Engineering
, 1999, no. 9, p. 15.
[3]
Krasnikova O.K., Mischenko T.S., Komarova L.R., Popov O.M., Udut V.N.
Khimicheskoe i neftegazovoe mashinostroenie — Chemical and Petroleum
Engineering
, 2002, no. 3, pp. 32–33.
[4]
Belyakov V.P., Pronko V.G., Epifanova V.I., Krasnikova O.K., Nikitkin V.D.,
Mischenko T.S.
Trubchatyy spiralnyy teploobmennik
[Tubular spiral heat
exchanger]. Certific. of authorship 542902 SSSR, Intern. class. of invent.
F28D7/02. no.1871186/06, USSR, newsletter no. 2, 1973, 4 p.
[5]
Krasnikova O.K.
Sposoby intensifikatsii teploobmena pri vynuzhdennoy
konvektsii v apparatakh kriogennykh sistem
[Ways of heat transfer
intensification for the case of forced convection in cryogenic system
assemblies]. Moscow, Central Institute of Scientific and Technical Information
on Chemical and Petroleum Machinery Publ., 1990, 36 p.
[6]
Kalinin E.K., Dreytser G.A., Yarkho S.A.
Intensifikatsiya teploobmena
v kanalakh
[Heat transfer intensification in pipes]. Moscow, Mashinostroenie
Publ., 1990, 208 p.
[7]
Ivanov V.L., Leontev A.I., Manushin E.A., Osipov M.I.
Teploobmennye
apparaty i sistemy okhlazhdeniya gazoturbinnykh i kombinirovannykh ustanovok