The device comprises of two tubes that are closely spaced. Hot water travels through a copper tube in the inner tube. While cold water is forced through GI pipe in the outer tube. The configuration allows the cold water to flow both parallel and anticlockwise. The flow measurement, inlet and output temperatures, and the LMTD of the heat transferred provide information on the efficiency of the apparatus.

Specifications:

• Inner copper tube I.D, 12.7mm. and outer G. I. Pipe I. D. 15mm. approx. and 1.5m. length.
• Thermometers – 4 nos.
• Measuring flask – 1 Lit. capacity.
• Geyser-3 kW. Single phase.

Services required-

• 220v, 15A, stabilized single-phase AC supply.
• Floor area – 3m x I m x 1 m height.