Abstract
The construction and operation of low-cost concentric double-tube heat exchangers is presented. These exchangers occupy little laboratory space due to their compact and portable design. Water taken from the laboratory mains is used as cooling fluid and flows in the shell side of exchanger. Hot fluid, which circulates in the tube side, is water supplied by a domestic electric heater. Flow rates are measured with flow meters and temperatures with thermocouples connected to a computer. Second-year undergraduate students of chemistry have been satisfactorily working with these exchangers for two years. Experimental data and calculated results from students are shown. Overall and film heat-transfer coefficients are determined. The main goal of the experimental described is to examine the heat transfer between incompressible fluids in the steady state.
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