Paper Conference

Proceedings of ASim Conference 2016: 3rd Asia conference of IBPSA-China, Japan, Korea


Office Building GSHP System Retrofit Analysis with RETScreen Plus

E. Lee, E. Kang, K. Lee, I. Da Cunha

Abstract: The Republic of Korea has implemented a Renewable Energy Obligation(REO) whereby public sector buildings larger than 1,000 m 2 must reduce their energy consumption by 18% in 2016 and at least 30% between by 2030. Well intended solutions have been proposed; however, not all options are evaluated on the same basis, potentially resulting in incomplete or sub-optimal solutions. What's more once projects are implemented, there are inconsistencies in the methods used to measure and evaluate operating performance of the post-retrofit case. In this study, a ground source heat pump has been developed to simulate the performance of the ground source heat pump. The three distinct energy zones involve heating, no-energy, and cooling. RETScreen Plus methodology is used to develop curve fits for each distinct zone as it builds a correlation with NASA satellite data. The model then factors the impact of information and control technologies(ICT) as a means to improve and lower the building's energy consumption. Two values of coefficient of performance(COP) are used-the first is a standard ICT COP, while the second is an improved ICT COP with a smart controller. This methodology can then be expanded to incorporate current and future smart meter technologies, time of use rates, energy price signals, demand response and electricity storage options. In summary, this methodology enables a building owner or energy conservation official to quickly and accurately determine the baseline energy for a building and the potential impacts of smart ICT technologies, especially for buildings equipped with GSHP technologies.
Keywords: RETScreen Plus, Energy Modeling, GSHP, ICT, Hybrid, Optimization Methodology NOMENCLATURE COP -Coefficient of Performance CUSUM -cumulative sum of variances