temperature.Fig. 6 shows a schemati

temperature.
Fig. 6 shows a schematic diagram for the data acquisition
system. The on–off control between the thermal storage tank and
the heat exchanger could maintain the temperature of the hot
water in the tank. Hot-water at a constant temperature is sent
indoors to the slab pipe by the pump, and the returned water goes
back to the tank. At this moment, data for temperatures of supplied
water, returned water and each section of the room are saved in the
PC.