A Study on the Optimization of Photovoltaic System for the ZEB Certification in Detached Housing

단독 주택의 제로에너지건축물 인증을 위한 태양광시스템 최적화에 관한 연구

Abstract

As part of the government's energy policy, Zero Energy Building certification was launched on January of 2017. However, the three passive-housing rental housing projects are the only ZEB-certified detached housing since the certification's launch. The reason is that, in order for a detached housing to earn ZEB certification, it has to secure self-reliance in energy, and a photovoltaic system is the only viable renewable energy system. Therefore, conducting an analysis to optimize the photovoltaic system in an early design stage is strongly recommended. This study aimed to propose an optimal photovoltaic system design for a detached housing after analyzing through the ECO2 energy simulation of 44 cases, varying in a module type and efficiency, inclination and azimuth. As a result, 15 cases out of 44 cases were analyzed to satisfy ZEB evaluation criteria, and it is thought that these data could contribute greatly to the expansion of ZEB certification dissemination.

Fig. 1 Photovoltaic system specifications applied to this study

Fig. 2 Comprehensive analysis results by ZEB level 5 satisfied condition case

Table 1 Analysis methods and specifications of base model

Table 3 Mono-Crystal silicon general module application [Without rating efficiency value]

Table 4 Mono-Crystal silicon general module application [Rating efficiency value (17.5%)]

Table 5 Mono-Crystal silicon high efficiency module application [Without rating efficiency value]

Table 6 Mono-Crystal silicon high efficiency module application[Rating efficiency value (19.1%)]

Table 2 The analysis of building energy efficiency rating in base model