Quick Answer: Shell Tube Heat Exchanger Water To Water passes hot water from a 3 Kw instantaneous heater through copper tubes in a 150NB shell, 750 m.m. long, while cold water flows over the tubes between 4 baffles. The tubes are 4.5 mm I.D. and 6.35 mm O.D. in triangular pitch.
Last updated: October 2026
Key Features
150NB shell with end boxes; one end box with divider plate
4 baffles with 25% cut in the shell
Copper tubes, 4.5 mm I.D., 6.35 mm O.D., triangular pitch
Instantaneous water heater, 3 Kw, for hot water
Thermometer and valves to control hot and cold water flow
Technical Specifications
Specification
Value
Shell
150NB, 750 m.m. long, with end boxes
End box
One with divider plate
Baffles
25% cut, 4 Nos.
Tubes
Copper, 4.5 mm I.D., 6.35 mm O.D., 250 m.m. length, triangular pitch
Water heater
Instantaneous, 3 Kw
Floor space
1.5 m x 1 m
Water supply
About 10 lit/min
About This Product
Hot water enters the lower side of the end box, flows through the tubes in the lower half of the shell, reverses at the far end and returns through the upper tubes before leaving. Cold water enters the lower part of the shell, passes over the tubes between the baffles and leaves through the outlet on the upper surface. The HEAT TRANSFER LAB set-up shows how a shell and tube exchanger transfers heat from one fluid to the other.
Frequently Asked Questions
Q1. How do the hot and cold water flow through the exchanger? Hot water flows through the lower tubes, reverses at the other end and returns through the upper tubes. Cold water enters the lower part of the shell, passes over the tubes between the baffles and leaves at the upper surface.
Q2. What heats the water? An instantaneous water heater of 3 Kw capacity supplies the hot water.
