986760.fig.002a
(a)
986760.fig.002b
(b)
Figure 2: (a) Lab-1 showing heat exchanger water inlet and outlet. (b) Heat exchanger copper piping through the walls of Lab-1. Overhead tank delivered water through an inlet valve. Circulation was ensured automatically through the positive pressure head created by the relative height of the overhead tank. Cool water in the under-surface reservoir was pumped back to overhead tank when required.