Paper Conference

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


Annual Operation Energy Consumption Comparison between Two different HVAC Systems in a Normal and Underwater Buildings

M. Jo, J. Park, J. Jeong

Abstract: The purpose of this study is to evaluate the applicability of a dedicated outdoor air system (DOAS) and variable air volume (VAV) system in a normal building above the ground and underwater building. The annual energy consumptions of the two systems were compared to determine their applicability in the normal and underwater buildings. The sensible and latent loads of each model building were calculated by TRNSYS 17 program. The normal building above ground was located in Ulsan, South Korea and the underwater building was located at 20 m below mean sea level in Ulsan. Based on the calculated thermal loads, the performance of each system was evaluated through a commercial engineering equation solver (EES). The result showed that the underwater office building had relatively lower and more constant annual heating and cooling loads compared to the normal building. Therefore, the DOAS and VAV system applied in the underwater building showed energy conservation of 63% and 64%, respectively, compared with the normal building. Additionally, the DOAS consumed 48% and 49% less electric energy than the VAV in the underwater and normal building respectively.
Keywords: Underwater buildings, Seawater free cooling, Energy consumption, Thermal load