7.3.1 Energy usage per sqm

Energy use density of university buildings in 2025

Srinakharinwirot University (SWU) measures the total energy used in its buildings and the floor space of its buildings so that energy use per square metre (energy use density) can be calculated each year. In 2025 (B.E. 2568), the total energy used by the University was 200,559 gigajoules (GJ) and the university floor space was 1,015,248 square metres (m²), giving an energy use density of 0.20 GJ per m².

Total energy used in 2025

SWU records the monthly electricity consumption of its two campuses, Prasarnmit Campus in Bangkok and Ongkharak Campus in Nakhon Nayok, through the SWU SDG Sustainability Web App dashboard, which reports energy use in kilowatt-hours (kWh) and gigajoules (GJ). In 2025, the University used 55,710,830 kWh of electricity, equal to 200,559 GJ (1 kWh = 0.0036 GJ): 102,953 GJ at Prasarnmit Campus and 97,606 GJ at Ongkharak Campus.

Figure 1. SWU SDG Sustainability Web App dashboard: total electricity consumption in 2025 (B.E. 2568), electricity consumption by campus, monthly trend and monthly comparison between Ongkharak and Prasarnmit campuses (GJ).

Source: SWU SDG Sustainability Web App dashboard – Electricity consumption (data for 2025, B.E. 2568) – https://script.google.com/macros/s/AKfycby53PzkcT8eUJD9a933GyE_59Tyse0n8TG1QjRJUxyqwEYqK_xBcjTKrLDgHnuEIs7G/exec

University floor space

The floor space covers university buildings only. At Ongkharak Campus, the building database in the SWU SDG Sustainability Web App dashboard lists 64 buildings by faculty or unit, including teaching and research buildings, the HRH Princess Maha Chakri Sirindhorn Medical Center, student and staff residences and indoor sports buildings, with a total floor space of 695,705 m². At Prasarnmit Campus, the University’s building-use statistics record a total floor space of 319,543 m².

Figure 2. SWU SDG Sustainability Web App dashboard: building floor space at Ongkharak Campus by faculty or unit (buildings 1–30).

Figure 3. SWU SDG Sustainability Web App dashboard: building floor space at Ongkharak Campus (buildings 31–64, total 695,705.03 m²).

Source: SWU SDG Sustainability Web App dashboard – Building data, Ongkharak Campus – https://script.google.com/macros/s/AKfycby53PzkcT8eUJD9a933GyE_59Tyse0n8TG1QjRJUxyqwEYqK_xBcjTKrLDgHnuEIs7G/exec

Figure 4. Building floor space at Prasarnmit Campus, total 319,543.46 m².

Source: Srinakharinwirot University Education Statistics, academic year 2022 (B.E. 2565), p. 36

Energy use density

Campus level: Prasarnmit Campus used 102,953 GJ over 319,543 m² (0.32 GJ per m²), and Ongkharak Campus used 97,606 GJ over 695,705 m² (0.14 GJ per m²).

University level: 200,559 GJ of energy used over 1,015,248 m² of floor space gives an energy use density of 0.20 GJ per m² for 2025.

These figures give SWU’s energy use density for 2025 and a baseline for tracking progress under the SWU Zero Carbon policy, which sets a target of reducing electricity use by 5% each year. The energy data are published on the University’s online dashboard, so the evidence is publicly available.