Question

water at the rate of 225 kg/hours is to be heated from
35^{0}C to 95^{0}C by means of a concentric tube
heat exchanger. Oil at a rate of 225kg/hr with specific heat of
2095 J/kg.K and temperature of 210^{0}C is to be used as
the hot fluid. If the overall heat transfer coefficient based on
the outer diameter of the inner tube is 550 W/m^{2}.K,
determine the length of heat exchanger if the outer diameter of the
tube is 100 mm.

Answer #1

Calculation is shown here is for counter flow concentric heat exchanger

Water at a flow rate of 60 kg/s enters the shell-side
of a baffled shell-and-tube heat exchanger at 35 °C and leaves at
25 °C. The heat will be transferred to 150 kg/s of raw water coming
from a supply at 15 °C. You are requested to design the heat
exchanger for this purpose. A single shell and single tube pass is
preferable. The tube diameter is ¾ in. (19 mm outer diameter with
16 mm inner diameter) and tubes...

A sugar solution (? = 1080 kg/m3, cp = 3601 J/kg ? K,
kf = 0.5764 W/m ? K, ? = 1.3 × 10–3 N ? s/m2) flows at
rate of 60,000 kg/hr and is to be heated from 25°C to 50°C. Water
at 95°C is available at a flow rate of 75,000 kg/hr (cp = 4004 J/kg
? K). It is proposed to use a one shell pass and two tubes pass
shell-and-tube heat exchanger containing 3/4 in. OD,...

A counter current double pipe heat exchanger is used to boil but
not superheat water at 100 DegreeC at rate of about 0.1 kg/s. This
is achieved by flowing hot oil at 400 DegreeC through the inner
pipe at a rate of 5 kg/s.
Latent heat of water: 2265 kJ/kg
Heat capacity of water: 4180 J/kgK
Heat capacity of the oil: 1800 J/kgK
What is the temperature of he hot oil leaving the heat
exchanger?
What is the overall heat...

A concentric tube heat exchanger is comprised of a stainless
steel (ks = 40 W/mK) inner pipe, NPS 2- nominal schedule
40 size (corresponding to an inner diameter of 52.5 mm and an outer
diameter of 60.3 mm), and an outer stainless steel pipe of NPS
3-nominal schedule 40 (ID = 77.9 mm, OD = 88.9 mm). The heat
exchanger has an effective length of 35 m.
The inner pipe fluid is ammonia (?a = 0.3 · 10?6
m2/s, cpa...

A 1-shell-2-tube pass heat exchanger
is made of a steel alloy (thermal conductivity 45.4 W/(m K). It is
used to cool distilled water from 34oC to
29oC using water which flows inside tubes with an outer
diameter of 19 mm and an inner diameter of 16 mm. The number of
tubes in the shell is 160 (80 per pass). The mass flow rate of
distilled water in the shell is 76180 kg/h. The cold water enters
the heat exchanger at...

A concentric tube heat exchanger is comprised of a stainless
steel (ks = 40 W/mK) inner pipe, NPS 2- nominal schedule
40 size (corresponding to an inner diameter of 52.5 mm and an outer
diameter of 60.3 mm), and an outer stainless steel pipe of NPS
3-nominal schedule 40 (ID = 77.9 mm, OD = 88.9 mm). The heat
exchanger has an effective length of 35 m.
The inner pipe fluid is ammonia (va = 0.3 ·
10-6m2/s, cpa =...

A process fluid having a specific heat of 3500 J/kg?K and
flowing at 2 kg/s is to be cooled from 80 °C to 40 °C with chilled
water, which is supplied at a temperature of 15 °C and a flow rate
of 2.5 kg/s. Assuming an overall heat transfer coefficient of 2000
W/m2?K, calculate the required heat transfer areas for the
following exchanger configurations: (a) Parallel flow; (b) Counter
flow; (c) a 1-2 shell and tube exchanger with the water...

A complex medium needs to be heated from 15°C to 37°C prior to
use in mammalian cell culture. You are responsible for deciding the
type of heat exchanger to adopt to achieve this heating. You are
considering using a doublepipe heat exchanger with either
co-current or counter-current flow. The medium flows through the
inner tube and hot water enters the outer annulus at 80°C. You are
given the following data:
Cell culture medium: Mass flowrate = 2 kg s-1 Specific...

Saturated water vapor leaves a steam turbine at a flow rate of
1.47 kg/s and a pressure of 0.51 bar. The vapor is to be completely
condensed to saturated liquid in a shell-and-tube heat exchanger
that uses city water as the cold fluid. The water enters the
thin-walled tubes at 17oC and is to leave at 57.6
oC. Assuming an overall heat transfer coefficient of
2000 W/m2K, determine the required heat exchanger
surface area and the water flow rate. cp,c...

Hot oil at a rate of 5 kg/s (Cpm= 2 kJ/kg. K) enters in a 2-4
shell and tube heat exchanger at 366 K and is cooled to 344 K by 2
kg/s of water (Cpm= 4 kJ/kg. K) entering at 283 K. The overall heat
transfer coefficient U0 is 340 W/m . Calculate the area requied. If
the length of each tube is 1.2 m, and the diameter of each tube is
0.1 m, calculate the number of tubes?

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 7 minutes ago

asked 24 minutes ago

asked 43 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago