Page 75 - Shaping A Sustainable Future

Good Environmental Practices 4R – Reduce, Reuse, Recycle, Recreate

There are some existing good environmental practices The Environmental Sustainability team opted to evaluate
already implemented at CKE Manufacturing. the operation of air-conditioners and the potential to
enhance environmental performance. Based on trial
For example, waste types are appropriately categorized data collected, our team evaluated ways to improve
for follow-up actions. Waste bins are clearly labelled the function of the air-conditioners and excellent air
and used to segregate metal wastes and general wastes. circulation. We also explored ways to recycle and reuse
Metals chips are sent for recycling and reuse. The water condensate generated from air-conditioners.
company is also working with the Singapore Institute
of Manufacturing Technology (SIMTech) to improve its
Manufacturing Control Tower (MCT) platform. This has Eco-Solutions
enabled the detection of defects in real-time, which
results in the reduction of metal waste. Eco-Solution 1: Operation of Air-
conditioning Units

Presentation of Data
Research has been conducted to determine possible
Emission Grid Factors (GEF), provided by the Energy changes to the operating temperature and setting of
Market Authority (EMA) in Singapore, were used the air conditioners. We note that under the Singapore
to calculate the carbon emissions associated with Standard CP 13 (Code of Practice for mechanical
the operation of air-conditioning units. The average ventilation and air-conditioning in buildings), it is
Operating Margin (OM) method was used for the specified that thermal comfort is achieved when the
calculation. indoor temperature is maintained between 22.5 C and
o
25.5 C, with an average relative humidity not exceeding
0
For the most recent dataset available, the year 2018, the 70 per cent.
conversion factor of 0.4188 kg CO /kWh was used for
2
calculation. Annual CO emission equivalents from the Our research gave us the confidence to propose a higher
2
air-conditioning system operation at CKE Manufacturing operating temperature to the management of CKE
is shown in Table 5. Manufacturing to reduce electricity consumption. We
examined noncritical areas, such as the offices, where a
Resource Annual Annual CO 2 Conversion Factor higher temperature setting was possible.
Usage Emissions
Air – 71,520 KWh 29,952.6 kg CO 2 0.4188 kg CO /kWh
2
Conditioner

Table 5: Carbon emission before project deployment

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