의료시설 에너지절약 운영방법 도출을 위한 사례분석을 통한 에너지 영향요소 분석

Case Study for Energy Conservation Measures of Hospital Buildings Using the Analysis of Energy Consumption Structure

Abstract

Because the hospital building operates 24 hours a day, 365 days a year for treatment and restoration of patients, it has a different pattern of energy use than that of ordinary buildings. Hospitals contribute to energy consumption and have a negative environmental impact. This study aims to find how meaningful energy performance, reflecting good energy management and ECMs, can be operated for hospital buildings, a category encompassing complex buildings with different systems and large differences between them. In this study, we proposed the energy diagnosis & evaluation method and energy management process to verify energy saving through operation data based on system & facility characteristics, operation pattern and energy consumption characteristics of hospital building. Energy consumption structures were surveyed throughout 4 reference hospital in Seoul, Korea. Findings confirm that different hospital departments have hugely different energy-demand profiles. Energy efficiency and energy saving potentials are presented. The energy performance analysis can be applied to a wide range of problems in energy-system operation.

Fig. 1 Preliminary procedure of energy analysis for hospital buildings

Fig. 2 Energy use aggregation levels of HVAC systems in buildings

Fig. 3 Definition and classification ECMs project, procedure of ECMs priority matrix

Fig. 4 Example of energy flow charts for a reference hospital A : a) electricity and b) district heat & city gas

Fig. 5 Power usage ratio by systems in reference buildings

Fig. 6 Thermal (heating/cooling) load contribution rate by zones

Fig. 7 Power & thermal energy usage ratio by equipment in reference buildings

Table 1 Classification of building energy management level

Table 2 Reference hospitals for the case study

Table 3 Zonal floor area ratio of reference hospitals

Table 4 Total energy use and energy analysis by energy sources (Level 1)

Table 5 Comparative assessment of energy consumption structure for reference hospitals