Research on the improvement of energy consumption for existing buildings on campus with green building daily energy saving index –the College of Architecture and Planning of Chung Hua University

• Main Authors: Chen, Chi-Hung, 陳紀宏
• Other Authors: Shiau, Yan-Chyuan
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/61397992874667039413

碩士 === 中華大學 === 營建管理學系碩士班 === 100 === In light of the growing threat from global warming, energy conservation and carbon reduction have become key objectives of policy implementations for governments around the world. In this research, the “daily energy saving index” from the EEWH green building evaluation system has been adopted as the basis of assessment for energy consumption improvement of existing buildings on campus. Daily energy saving index entails EL (lighting system energy efficiency), EAC (air-conditioning system energy efficiency) and EEV (building envelop energy efficiency); a building needs to pass all three efficiency standards to receive a passing daily energy saving index score. The standard was used to assess aspects of target buildings including their existing power consumption, consumption density, consumption structure and so forth to review and improve upon the noncompliant items based on the results of green building assessment. For purposes of this research, Ecotect has been chosen as the tool for situation analysis and case validation by incorporating building information modeling for analyses of sun shading, heat radiation, light environment and so forth; for noncompliant items, the study provided means of energy conservation improvement to improve relevant performances along with estimates of improvement margins so that the target buildings would become compliant with green building standards. This would reduce energy consumption and facilitate sustained development for the buildings in question. In the assessments conducted in the study, the target buildings failed to pass the EEV standard. The plan of improvement presented in the study suggested that the building envelop required an exterior shading system (running 70cm vertically and horizontally) to achieve the expected energy saving performance required for green building standard. As for the buildings’ existing air-conditioning systems, the study found them compliant with current standards. With the suggested shading system in place, it may be expected to save approximately 10% of the costs of electricity bill for air-conditioning per year. With regards to energy conservation for lighting systems, the target buildings are in fact compliant with the green building standards. Presently, a portion of the T8 light fixtures have been replaced with the energy-saving T5 fixtures, which are expected to save approximately NT$ 170,000 per year for electricity costs. The costs of these new light fixtures are expected to be recouped within 2.1 years.