Paper Conference

Proceedings of ASim Conference 2014: 2nd Asia conference of IBPSA-China, Japan, Korea


Practical research on effective use of simulation for HVAC systems in the retro-commissioning process

Hideki Tanaka, Seiji Ito, Yuki Morikawa, Yasunori Akashi, Motoi Yamaha

Abstract: This paper discusses a method and significance of utilizing simulations for HVAC systems in a retro-commissioning process. In the retro-commissioning project in this study, the performance of air-side HVAC systems were verified based on operational data derived from BEMS (Building Energy Management System) and short-term simple measurements. Also, system simulations were conducted for the air-side HVAC system with operational data to evaluate the effect of future retrofit. The LCEM tool was used to examine and simulate the effect of reducing the electricity consumed by fans by replacing air distribution system from CAV to VAV. The results indicate that VAV retrofitting may cut energy consumption by 52% in summer season, by 62% in winter on the entire typical office floor. The behavior of air-side HVAC system, and energy performance after retrofit improvement could be estimated by using system simulation based on actual operational data.
Keywords: Retro-commissioning, System simulation, LCEM tool, Operational data, BEMS
Pages: 340 - 347