Russian Journal of Applied Chemistry, 2008, Vol. 81, No. 3, pp. 520−523. © Pleiades Publishing, Ltd., 2008.
Original Russian Text © V.S. Danil’chuk, N.A. Nezamaev, M.Kh. El’zhurkaev, A.N. Verigin, 2008, published in Khimicheskaya Promyshlennost’, 2008,
Vol. 85, No. 1, pp. 9−12.
MODELING AND CALCULATION
OF TECHNOLOGICAL PROCESSES
Heat exchangers with the upright heat-exchange
elements possess sufficiently high intensity of heat
exchange even at the mixing of non-Newtonian ﬂ uids .
Rational combination of the construction of inside units
and the agitator ensures intensive circulation of working
media at sufﬁ ciently uniform velocity ﬁ eld.
On the stage of calculation and development of the
apparatus with upright heat-exchange elements two
problems should be solved. First one is to determine
constructive and regime parameters which provide
maximum output of the device within conditions of the
given constructions. Second problem consists in providing
the given output at the minimum of costs at designing and
operation of the device. A calculation and optimization
of the following parameters: pipe diameter (d
of pipes in the bundle (n
), number of bundles (n
), total heat exchange surface (F),
agitator diameter (d
), drive power, characteristics of
heat pump [pressure (ΔP), and cooling agent ﬂ ow (V
are necessary to solve the ﬁ rst and the second problems.
The cited parameters deﬁ ne values of heat radiation
coefﬁ cients α
, heat transfer coefﬁ cient (K), and
heat ﬂ ow through surface of heat-exchangers.
Volume of device (V
) and heat efﬁ ciency of the
processes per mass unit of heat carrier (q
) are initial
parameters to calculate maximum possible output.
Required volume of the device is calculated according
to equation (1):
V = Gτ /ρ,
where G is heat-carrier ﬂ ow, kg/s; ρ is heat carrier density,
, average duration of residence of heat carrier, s.
Synthesis of New Substituted Thiazoles
Containing Aminooxadiazole Ring
V. S. Danil’chuk, N. A. Nezamaev, M. Kh. El’zhurkaev, and A. N. Verigin
St. Petersburg State Technological Institute, St. Petersburg, Russia
Abstract—Heat exchangers of circulating type are used extensively in the heat exchange processes. Circulation of
liquid in these devices is ensured by mechanical mixing devices, and heat exchange is enhanced by the increase of
the heat exchange surface. The application of the upright heat exchange elements like double pipes providing a cross-
ﬂ ow regime in the device is the most effective. Calculation of the apparatus with the vertical heat-exchange elements
for determination of constructive and regime parameters at maximum output of the device was presented.
Fig. 1. Batch reactor. (1) Drive, (2) reactor body, (3) agitator,
(4) upright heat exchange elements.