High frequency flow and temperature measurements of domestic water in two office and education buildings

For a long period, the energy use for domestic hot water (DHW) in non-residential buildings has been neglected. As space heating, ventilation, and lightning reduced through years, share DHW production increased. With today’s focus on efficient buildings, systems must not be left behind other fields to obtain holistic approach buildings. To develop more knowledge is needed regarding draw-off durations, flow rates, temperatures from different types. This paper presents high frequency measurement results two Danish office educational which show that three only utilize between 3.4 7.5 % of total used production. Above 85 lost recirculation circuit secure temperature at point. However, measurements points significant heat pipes covered by recirculation. One reason durations are approximately 50 time below 10 s washbasins kitchen sinks. Another actual maximum rates far calculated design flow. The multiple give essential patterns washbasins, sinks, service sinks can contribute developing new types