Page 47 - Shaping A Sustainable Future

Continued from the previous table As part of our project, we have put the “Spider” on trial
since the 2nd week of September. Reported readings are
Item Description Part Number (Images) Price sent to the server-side over for 1 minute. This interval is
Storage (EEPROM) – 32KB AT24C256 $1 configurable and will be increased in future production
For storage of spider runs to prolong battery life. As Singapore was still in
configuration and a lookup Phase II of the circuit breaker, which is the measure to
table of IR-codes of the IR- fight against the COVID-19 pandemic, Cavill did not put
controllable devices.
its office in the whole operation, and staff continued to
work from home.
Customised Housing Off the shelf housing + $13
wiring and connectors.
• Energy saved per air-conditioning unit:

Power reduction per weekday:
Power (Lithium Battery) 18650 $2 2 hr x 17.9 kW = 35.8 kWh

Power reduction per annum:
*261 weekdays x 35.8 kWh
= 9,343.8 kWh per annum
Type-C USB 5V 1A 18650 TP4056 $1
Lithium Battery Charger • Cost saved per air-conditioning unit:
Module Charging Board Dual
Functions with Protection
Cost saved per weekday:
**22.93 cents x 35.8 kWh = $8.20

Battery Housing $1 Cost saved per annum:
261 weekdays x $8.20 = $2,140.20 per annum

* average weekdays in the year 2019
**cents per kWh from 1 October 2020 – 31 December
Barrel Jack (bundle of 10 $1 2020
pcs)
Overall, Cavill would reduce their power users and
power wastage while enjoying cost savings.

Estimated Cost per set $30
Shipping (Estimated) $50

Table 3: Bill of materials.

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