PROJECT
41
A vertical sewerage stack.
A solenoid valve in the
domestic water tank.
needed, and to use more water when needed. Users
can select to flush the toilet with less water by pressing
a smaller flush button or flush with more water using
the larger button.
The water in the handbasins, showers, and kitchens
are municipal potable water that is of a high quality
and safe for human and/or domestic consumption.
It can safely be used for drinking, hand washing,
showering, and food preparation. There are tanks in
the building that store municipal water in case of a
water outage. This means there will still be water in
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the building in the event of a disruption to municipal
supply.
PIPING HOT
Hot water in the building is produced by five heat pumps.
Heat recovery from the air-conditioning system is used
to heat the water. Each heat pump supplies hot water
at a constant temperature of 58°C. The coefficient of
performance (COP) of the heat pumps is not less than
3.5. The heat pumps are controlled by a temperature
sensor in the bottom of the storage tank, set to start the
heat pumps when the temperature drops below 45°C.
Continued on page 43 >>
January 2018 Volume 23 I Number 11