VIRTUAL: Livable Cities – New York
Abstract
All countries are currently facing serious issues with climate risks and a lack of resources. To address this problem, almost all nations advocate for achieving carbon neutrality and reducing carbon emissions across all sectors. In South Korea, significant efforts have been made to reduce carbon emissions in areas such as building, transportation, and industry. Specifically, the building sector has adopted the Zero Energy Building (ZEB) Certification System and expanded its use to eliminate carbon emissions in new and existing buildings. This paper analyzes the performance of the HVAC system based on data measured in a building that acquired the ZEB accreditation. The target building is equipped with a Building Energy Management System (BEMS) and has around three hundred measurement points. The study selected and verified data from about 100 measurement points taken over a 7 to 8 year period. The building employs one Air Handling Unit (AHU), one Turbo Chiller and three ground source heat pumps (GSHP), with the three GSHPs sequentially connected to three thermal energy storage systems. The performance analysis showed that the COP of two GSHPs under consideration significantly decreased. During the last 5 years, COP of GSHP 1 and 3 COP decreased by 27.4%, and 38.9% respectively. COP of GSHP 2 decreased by 13.2%. Moreover, the COP of the chiller was reduced by 27.3% over the last five years.
Kwang Ho Lee received his Ph.D. from the University of Illinois at Urbana-Champaign in 2009, and until 2011 he completed postdoc and research specialist positions at the University of California at Berkeley and Lawrence Berkeley National Lab. In the past five years, 20 papers have been published as corresponding authors in SCI(E) indexed journals such as Energy and Buildings. In 2016, he received an emerging professor award for the Society of Air conditioning and Refrigerating Engineers of Korea and the Minister of Trade, Industry and Energy’s Commendation for 2017 World Standard Day.
Sang Hoon Lee is a senior scientific engineering associate in the Building Technology and Urban Systems Division. He received a Ph.D. in Building Technology and M.S. in Integrated Facility Management from the Georgia Institute of Technology. He is a LEED accredited professional with USGBC and a Facility Management Professional with IFMA. His current work focuses on the building energy simulation and modeling method in different fidelities and for diverse needs. He worked at the Georgia Institute of Technology for developing energy modeling methods that are implemented in tools.
Jongman Lee is a Ph.D. student at Korea University, South Korea, and received M.S. in the Department of architectural engineering at Hanbat National University. His major is architecture, specifically, studying the building environment and building energy simulation.
8:00 pm - 9:30 pm
Wednesday 14th June, 2023