Energy Saving and Carbon Reduction Targets and Results
USI's 2025 energy saving and carbon reduction execution plans and
results are as shown in the table below. A total of 4 energy saving and carbon reduction plans were
executed, with carbon reductions of 1,922 metric tons of CO2e and an investment of
NT$10.88 million.
| Item |
Plan Name |
Category |
Energy Savings |
Unit |
Carbon Reduction
(MT CO2e/year) |
Investment Amount (NT$1,000) |
| 1 |
Manufacturing Department III shutdown, chiller stops running |
Power saving |
3,468,564 |
kWh |
1,644.1 |
44 |
| 2 |
Manufacturing Department I B-Line addition of modifier injection point at
secondary compressor inlet |
Power saving |
43,501 |
kWh |
20.6 |
1,000 |
| 3 |
B Line LDV opening adjustment to reduce secondary compressor load |
Power saving |
532,537 |
kWh |
252.4 |
44 |
| 4 |
Demand bidding |
Power saving |
10,272 |
kWh |
4.9 |
- |
| Total |
Power saving |
4,054,874 |
kWh |
1,922 |
1,088 |
Note 1: The carbon emission conversion factor for electricity is 0.474 MT
CO2e/1,000 kWh.
Note 2: Data source: Energy Administration 2025 Energy User Energy Conservation Audit
System Declaration Form.
Note 3: Calculation method for Item 1: Calculate power savings based on equipment
specifications and downtime.
Note 4: Calculation method for Item 2: Calculate power savings based on equipment
operating current and production line operating time.
Note 5: Calculation method for Item 3: Calculate power savings based on equipment
operating current before and after improvement and production line operating time.
Note 6: Item 4 represents electricity from demand response load management measures.
2026 Energy Saving Plans and Estimated Targets
| Item |
Plan Name |
Category |
Energy Savings |
Unit |
Carbon Reduction (MT CO2e/year) |
Investment Amount (NT$1,000) |
| 1 |
Manufacturing Department II air compressor renewal |
Power saving |
232,206 |
kWh |
110.1 |
6,900 |
| 2 |
Cooling water tower fan material replacement |
Power saving |
357,193 |
kWh |
169.3 |
2,000 |
| 3 |
Transformer renewal |
Power saving |
1,606,392 |
kWh |
761.1 |
12,210 |
| 4 |
Manufacturing Department I primary compressor return power saving |
Power saving
Natural gas saving |
37,026
8,100 |
kWh
Cubic meters |
34.4 |
1,000 |
| 5 |
Manufacturing Department II melt pump converted to AC variable frequency
|
Power saving |
475,219 |
kWh |
225.3 |
32,000 |
| 6 |
Lighting fixture replacement |
Power saving |
301,163 |
kWh |
142.8 |
5,310 |
|
Total |
Power saving
Natural gas saving |
3,009,199
8,100 |
kWh
Cubic meters |
1,443 |
59,420 |
Note: Power savings of 3,009,199 kWh + natural gas savings of 8,100 cubic meters;
the combined converted power savings equal 3,017,403 kWh.