Energy, exergy analysis and optimization of insulation thickness on buildings in a low-temperature district heating system

In the study, energy and exergy analysis of buildings on a campus in Turkey are conducted by using actual operating data taking measurements district heating system as case study. The demands, losses that stem from all calculated according to average daily outdoor temperature data. Due high heat buildings, determining optimal insulation thickness for exterior wall should be investigated. Therefore, thicknesses, savings, fuel consumptions payback periods material building examined Life Cycle Assessment P1–P2 method natural gas. Optimal thicknesses different materials such XPS, glass wool, rock wool EPS climatic regions (HDD=800–4250°C days). According components per unit area, total loss is 2.39×10-2 kW/m2.year 1.42×10-3 kW/m2 (5.92%) this stems walls, 1.93×10-3 (8.07%) floors, 7.37×10-4 (3.08%) roofs, 1.58×10-2 (65.99%) windows doors, 4.04×10-3 (16.92%) ventilation with infiltration. Energy requirement values found between 2.68–25.70 kWh/m3 towards warmest coldest region uninsulated wall. un-insulated state, consumption varies 1.93-18.48 m3/m2 region. building’s 2.3–10.0 cm regions. In-state 3 cm, decreases 46.63%–53.46% compared state.