Case-Based Analysis for Establishing Economic Design Standards of Solar Hot Water System

Doo-Sung Choi; Young-Ho Jung; Hung-Chan Jeon

doi:10.21086/ksles.2025.10.32.5.628

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2025 Vol.32, Issue 5 Preview Page Next Page

Case Study

Case-Based Analysis for Establishing Economic Design Standards of Solar Hot Water System 태양열 급탕 시스템의 경제적 설계 기준 도출을 위한 사례 기반 분석

31 October 2025. pp. 628-638

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Abstract

This study presents the appropriate Solar Fraction for solar hot water systems according to seasonal heat load distribution and hot water usage patterns, based on case analyses of buildings with high domestic hot water demand where solar thermal systems have been applied. For this purpose, five types of buildings were selected and analyzed among apartment and lodging facilities that have relatively large collector areas and reflect seasonal variations in thermal load distribution. The analysis results indicate that, when both economic feasibility and system efficiency are considered, the optimal solar fraction is approximately 45–50% for buildings where the summer hot water load accounts for about 30–100% of the winter load, while buildings with relatively uniform year-round hot water loads show an optimal value of around 55%.

Keywords

Solar thermal hot water system

Solar fraction

LCC

Lodging facilities

Apartment

References

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Information

Publisher :The Korean Society of Living Environmental System
Publisher(Ko) :한국생활환경학회
Journal Title :Journal of The Korean Society of Living Environmental System
Journal Title(Ko) :한국생활환경학회
Volume : 32
No :5
Pages :628-638
Received Date : 2025-10-13
Revised Date : 2025-10-23
Accepted Date : 2025-10-23
DOI :https://doi.org/10.21086/ksles.2025.10.32.5.628

Journal of The Korean Society of Living Environmental System ISSN:1226-1289(Print) 한국생활환경학회

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