The equipment used to transfer heat from one fluid to another is called a heat exchanger. Two tubes in a single pass make up the shell and tube heat exchanger. The hot fluid is water that has been heated in a water heater. Water is used as the coil fluid. Figure depicts the schematic flow configuration. Hot water enters the end box's lower side, travels through the lower half's tubes, and exits at the opposite end. It changes course, travels via tubes in the top half of the shell, and then emerges. Cold water enters the shell's lower portion, travels over the tubes between the baffles, and exits the shell through an outlet on the top surface.

SPECIFICATIONS:

• Shell – 150NB, 750 m.m. long provided with end boxes.

a.One end box with divider plate.

b.25% cut baffles – 4 Nos. in the shell.

• Tubes – 4.5mm I.D., 6.35mm O.D.,250 m.m. length copper tubes with triangular pitch.
• Instantaneous water heater, 3 Kw capacity, to supply hot water.
• Thermometer for measuring the water temperature.
• Valves to control hot and cold water flow.

SERVICES REQUIRED

• 3 P H, AC supply
• Floor space 1.5m. X 1m,
• 230V, 15A, AC supply with earthing connection.
• Water supply at the rate of about 10 lit/min at constant heat.