Comparative Analysis on the Characteristic of Typical Meteorological Year Applying Principal Component Analysis

주성분분석에 의한 TMY 특성 비교분석

Abstract

The reliable Typical Meteorological Year (TMY) data, sometimes called Test Reference Year (TRY) data, are necessary in the feasibility study of renewable energy installation as well as zero energy building. In Korea, there are available TMY data; TMY from Korea Institute of Energy Research (KIER), TRY from the Korean Solar Energy Society (KSES) and TRY from Passive House Institute Korea (PHIKO). This study aims at examining their characteristics by using Principle Component Analysis (PCA) at six ground observing stations. First step is to investigate the annual averages of meteorological elements from TMY data and their standard deviations. Then, PCA is done to find which principle components are derived from different TMY data. Temperature and solar irradiance are determined as the main principle component of TMY data produced by KIER and KSES at all stations whereas TRY data from PHIKO does not show similar result from those by KIER and KSES.

Fig. 1 The Concept of the TMY

Fig. 2 The scree plot and variance of the TMY data from KIER in Daejeon

Fig. 3 The scree plot and variance of the TRY data from PHIKO in Daejeon

Fig. 4 The scree plot and variance explained of the TRY data from KSES in Daejeon

Table 1 The representative TMY data sets

Table 2 The comparison of the TMY data between the 3 institutions ^13-19)

Table 3 The elements of the TMY data between the 3 institutions

Table 4 The comparison of solar irradiance and meteorological elements between the 3 institutions

Table 4 The comparison of solar irradiance and meteorological elements between the 3 institutions (Continued)

Table 5 The PCA results of the TMY data of KIER

Table 6 The PCA results of the TRY data of PHIKO

Table 7 The PCA results of the TRY data of KSES