Optimization-based Modeling of Commercial Buildings with Split System for Energy Simulation

Jinhyung Park; Kwangwon Choi; Jaewan Joe; Hongjae Cho; Dongkon Hwang

doi:10.7836/kses.2024.44.5.071

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2024 Vol.44, Issue 5 Preview Page Next Page

Research Article

Optimization-based Modeling of Commercial Buildings with Split System for Energy Simulation Split System이 적용된 상업건물의 Energy Simulation을 위한 최적화 기반 모델링 연구

30 October 2024. pp. 71-82

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Abstract

This study optimized building energy models with HVAC split systems based on actual measurement using EnergyPlus and GenOpt. An eight-story commercial building in Seoul was modeled based on drawings, an energy audit, and measured data. The methodology involved investigating DX split systems, selecting modeling methods, and optimizing based on measured data. Three HVAC systems were examined: the ideal loads air system, VRF, and PTAC. The VRF system was modeled with DesignBuilder and simulated in EnergyPlus. Key parameters included thermal conductivity of walls, doors, windows, internal heat gains, infiltration rates, and coefficients of the HVAC performance curve. The optimized total energy matched the measured data, with NMBE decreasing from 25.30% to 0.40% and RMSE decreasing from 1.15 kWh to 0.84 kWh, meeting ASHRAE Guideline 14. However, although the CV (RMSE) decreased from 51.40% to 37.22%, it still did not meet ASHRAE Guideline 14. This study demonstrates the feasibility of using GenOpt to optimize building energy models with HVAC systems in EnergyPlus, which can be used for various research purposes.

Keywords

HVAC system

EnergyPlus

Genopt

Energy Efficiency

키워드

냉난방 시스템

에너지플러스

젠옵트

에너지 효율

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Information

Publisher :Korean Solar Energy Society
Publisher(Ko) :한국태양에너지학회
Journal Title :Journal of the Korean Solar Energy Society
Journal Title(Ko) :한국태양에너지학회 논문집
Volume : 44
No :5
Pages :71-82
Received Date : 2024-08-20
Revised Date : 2024-10-23
Accepted Date : 2024-10-23
DOI :https://doi.org/10.7836/kses.2024.44.5.071

Journal of the Korean Solar Energy Society ISSN:1598-6411(Print) 2508-3562(Online) 한국태양에너지학회 논문집

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