The device consists of two closely spaced tubes, where hot water flows through a copper inner tube and cold water is forced through a GI pipe in the outer tube. The design allows the cold water to flow in both parallel and anticlockwise directions. The efficiency of the apparatus is determined by measuring the flow rates, inlet and outlet temperatures, as well as the Log Mean Temperature Difference (LMTD) of the heat transferred.

Experimental Objective

·        To investigate how flow arrangement (counter-current vs. co-current) affects thermal efficiency and overall heat transfer coefficient in a concentric tube heat exchanger.

·        To analyze the impact of hot and cold fluid flow rates on thermal efficiency and overall heat transfer coefficient in the exchanger.

Specifications

·        Inner copper tube: 12.7 mm I.D.

·        Outer G.I. pipe: 15 mm I.D.

·        Approximate length: 1.5 meters.

·        Four thermometers included for temperature measurement.

·        Measuring flask with 1-liter capacity.

·        3 kW single-phase geyser for heating.

Utilities required other than above supply

220V, 15A, stabilized single phase AC electric supply.

Floor area of 3meters x 1meter x 1meter height.