2.3. The experimental procedures
A series of experiments were done to test the performances of
the HPSWH system with respect to three aspects.
Firstly, to test the impact of the water pre-heated loops on the
system performance, the experiments were done under two conditions
as follows.Exp. 1: The experiment was done without the water pre-heated
loop. The cold water that flowed into the water mixing valve
and the HWT was not pre-heated by the SDW.
Exp. 2: The experiment was done with the water pre-heated
loops. The tap water was pre-heated before flowing into the
mixing water valve and the HWT.