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1. The sanitary fixtures inside one of the disabled bathrooms.
2. The basins and taps in the bathroom
Johann Lourens
Johann Lourens
Geberit Mepla was used for the water piping as it is much more cost effective than copper piping and requires little to no maintenance. The pipes are also bendable, thus requiring less fittings to achieve the same result. There is also a cost saving on labour as the piping is crimped together rather than welded.
Electrical usage So what is the impact of the wet services system on electrical usage?
The installation has four pumps that require electricity, and the power consumption is as follows:
• 2 × subsoil sump pumps: Flow measurements taken on site indicate an inflow into each sump of approximately 15m ³/ hr. This may vary seasonally and over time. An estimated 19.68kWh of energy is required( assuming a pump efficiency of 0.6) for a 24-hour period per sump.
• Sewer pump sump: The sewer pump sump is provided for the future Netcare bunker areas, with a few toilets, wash hand basins and sinks, as well as some floor drains provided for the draining of the fire riser pipes. It is expected that very little water will be pumped from this sump— an estimated average daily volume of 2 000l. An estimated 0.1kWh of energy is required( assuming a pump efficiency of 0.6) for a 24-hour period per sump.
• Cold-water distribution pumps: Water from the council mains is fed by gravity pressure up to the roof level to the main domestic storage tanks. From the main tanks, the water will be pumped into the building so that a minimum pressure at the top level of 3 bar is achieved. The domestic pumps will be regulated by a variable speed drive.
The total estimated daily water demand for the building is 120 000l. An estimated 12.24kWh of energy is required( assuming an efficiency of 0.8) per day.
Sustainable design The hospital’ s wet services design boasts various sustainable /‘ green’ features, including the re-use of sterilised autoclave and renal care water.
Both the autoclaves, as well as the renal care service, produce sterilised wastewater that can be recycled, especially for flushing in water closets and urinals.
The hospital’ s wet services design boasts various sustainable /‘ green’ features, including the re-use of sterilised autoclave and renal care water.
Continued on page 44 >> www. plumbingafrica. co. za February 2017 Volume 22 I Number 12