Table 6.
LCC analysis for the 20 W LED tube replacing Philips 36 W fluorescent tube.
| Variables | Value | Unit |
|---|---|---|
| LED-wattage | 20 | Watts |
| LED-single unit cost | RM60.00 | Ringgit |
| Existing light-wattage | 36 | Watts |
| Existing light-single unit cost | RM10.00 | Ringgit |
| Number of lamps | 8751 | Lamp(s) |
| Running time per day | 8 | Hours |
| Operational days (per year) | 260 | Days |
| Cost of energy/kWh | RM0.39 | Ringgit |
|
| ||
| Calculations | Existing system | LED |
|
| ||
| Electrical costs | ||
| Electrical load of lamp(s) | 315036 | 175020 |
| Running time per year | 2080 | 2080 |
| Energy consumed per year (kWh) | 655274.88 | 364041.6 |
| Electrical demand saving (kWh) | 0 | 291233.28 |
| Total cost of energy (per year) | RM257,523.03 | RM143,068.35 |
| Saving the electrical fees (per year) | RM0.00 | RM114,454.68 |
| Capital requirements | ||
| Purchase requirements Cost | RM87,510.00 | RM525,060.00 |
| Installation cost per unit | RM2.00 | RM1.00 |
| Installation costs | RM17,502.00 | RM8,751.00 |
| Total capital investment requirements | RM105,012.00 | RM533,811.00 |
| Net investment requirement | RM0.00 | RM428,799.00 |
| Maintenance requirements | ||
| Life time of lamp (operating hours) | 15000 | 50000 |
| Replacements required (per year) | 1213.47 | 364.04 |
| Replacement costs (per year) | RM12,134.72 | RM21,842.50 |
| Installation cost per new unit | RM2.00 | RM1.00 |
| Maintenance costs (per year) | RM2,426.94 | RM364.04 |
| Total maintenance costs (per year) | RM14,561.66 | RM22,206.54 |
| Saving maintenance (per year) | RM0.00 | −RM7,644.87 |
| ROI results | ||
| Total operating cost (per year) | RM272,084.69 | RM165,274.89 |
| Total savings first year Saving the electrical fees + savings maintenance |
RM0.00 | RM106,809.81 |
| Payback period in years Time to payback capital requirement cost |
n/a | 4.01 |
| LED return on investment (ROI) over 10 years |
RM0.00 | RM534,287.05 |