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Initiative
Objective
Progress/current activities
Phase 1: a 500kWp solar photovoltaic plant
at Clearwater Mall
Phase 2: plant increased to 1 500kWp
The plant started operating in November 2014.
Phase 1 was commissioned between November 2014 and
June 2015, and the plant generated 510 729kWh, equating to a
saving of 208 tonnes of coal.
From August 2015, phase 1 and 2 have a generating capacity
of 2,5GWh.
Capital replacement programme
Ensures capital equipment at the end of its lifecycle is
replaced with energy-efficient equipment against the
following criteria: non-ozone-depleting refrigerant gas;
reverse cycle heating instead of electrical element heating;
and performance co-efficient 3,5 or better.
All capital replacements are approved by the national
technical manager. At Somerset Mall, three package units
are replaced every year. Only non-ozone-depleting R410
refrigerant units with a co-efficient of performance of 3,5
or better are installed. At Canal Walk, one-third of console
units are replaced annually with R410 refrigerant and energy-
efficient inverter units.
Modify thermostat set points and supply
temperature for chiller water
Lower energy costs in winter and summer.
Malls with Building Management Systems (BMS) installed,
enabled implementation.
Variable speed drives (VSDs) for heating,
ventilation and air-conditioning (AC)
systems
Match speed to required output to reduce consumption.
All relevant systems fitted with VSDs.
LED lighting and occupancy sensors
Improve lamp life and reduce required power factor
correction.
All mall common areas fitted with LED lighting.
Implement preventive maintenance
programmes
Ensure optimal operation of equipment.
All equipment is serviced monthly in line with service level
agreement.
Peak energy demand reduction
Reduce power consumption in peak periods (premium
tariff) and avoid expensive peaks, reducing the cost of
consumption.
Buildings that would benefit from time-of-use tariffs have
been converted to this structure.
Power factor correction
Reduced consumption (in kVA), which accounts for current
and pressure.
Power factor correction technology installed at all buildings
where appropriate.
Light-coloured surfaces
Buildings absorb less radiant energy, reducing solar heat gain
and reliance on artificial light.
By using heat-reflective paint on the roof at Woodland’s
Boulevard, we reduced peak load Air Conditioning (AC)
consumption by 16%.
Insulating duct and pipework for heating,
ventilation and AC
Reduce loss of cold air from AC systems into building
environment.
Ongoing and monitored monthly through service level
agreements.
Architectural shading and external planting
Reduce solar gain and energy use.
Implemented at Rosebank Mall and Canal Walk as part of
extensions and refurbishments.
Current energy and carbon emission savings initiatives
The table below highlights ongoing opportunities to manage water more efficiently.
Initiative
Objective
Benefits
Progress
Smart metering
To improve measuring and
monitoring of water consumption
and identify leaks from unusual
flow patterns.
Q
Anomalies immediately flagged, limiting risk and
consequential loss
Q
Accurately tracking consumption patterns optimises financial
benefits of time-of-use tariff
Q
Balancing sub-meters back to bulk meter at all times to flag
any bypassing
Bulk check meters installed at certain
sites.
Fire system water
consumption
Identify leaks and illegal use of
water.
To save water and avoid the abuse of infrastructure.
All buildings monitored.
Water efficiency initiatives
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Hyprop Investments Limited
Integrated Report 2015