Research on Energy Saving and Economy of Old Buildings Based on Parametric Design: A Case Study of a Hospital in Linyi City, Shandong Province

With the need for a green economy and introduction of low-carbon policies, more old buildings are being transformed to improve thermal performance reduce energy consumption. However, people ignore village public buildings. Based on investigation typical health center in Linyi City, this paper proposed improvement measures using EnergyPlus simulation software JePlus parameter chemical tools. The various factors analyze parts enclosure, energy-saving effect roof is better than that exterior wall: When thickness insulation layer gradually increases from 0 cm 30 cm, unit consumption building decreases 57 kW·h/m2 42.8 kW·h/m2, while reduced 24.41 kW·h/m2. Double windows effectively all renovation schemes. optimal scheme selected through parameterized design overall enclosure reconstruction schemes initial investments. results showed investment recovery was between 1.36–5.28 years. Plan 5 (12 XPS used as material wall roof, window replaced with 6 mm medium transmittance Low-e + 12 air clear) had highest efficiency (91.11%). 2 (6 single heat-reflecting glass) shortest period (2.04 years).