Paper Conference

Proceedings of ASim Conference 2012: 1st Asia conference of IBPSA-China, Japan, Korea


Commissioning of air conditioning system and university facility energy consumption by LCEM tool

Kiyotaka Okada, Masaya Okumiya

Abstract: Recently, there has been increased emphasis on designing buildings that fully satisfy the requirements of the owners. In Japan, commissioning is forecast as a means of confirming whether or not required performance (e.g. energy consumption of building, environmental load of building and equipment, and quality of building) is taken full advantage. In the present study, initial commissioning (commissioning during the design phase) of a Japanese university building is carried out for the first time. The target building is located in Aichi Prefecture, Japan, and is an experimental research facility with a total floor area of 7046.9m². The heating and cooling system of the target building is both the centralized air conditioning system (the system of student’s and teacher’s rooms) and the individual air conditioning system (the system of laboratories), and the heat source water is designed to use well water with a stable temperature of about 21°C, regardless of the time of year. The purpose of this study is to consider the performance value specified in the Owner’s Project Requirement (OPR), that is 1.86GJ/ m² a, and to make a decision regarding reference value of system assessment during operation phase by evaluating the energy consumption of the target building. Energy consumption calculations were carried out using MicroHASP/TES and the Life Cycle Energy Management (LCEM) tool. MicroHASP/TES is the dynamic thermal load calculation software package, and the LCEM tool is designed to simulate air conditioning equipment in order to carry out life cycle energy management of a building from the design phase to the operation phase. The LCEM tool is used mainly for calculating the energy consumption of the air conditioning equipment. The results indicate that energy consumption of the entire building is 13667.8 GJ per year (1.94 GJ/(m²⋅a)), which includes electrical power for lighting, equipment, the heat source, the cooling tower, pumps, elevators and fans. This is close to the performance value of 1.86 GJ/(m²⋅a) specified in the OPR. The use of such a model-based simulation makes it possible to make appropriate equipment choices during the construction phase and to achieve operation improvement during the operation phase. Thereby, appropriate energy management for the life cycle of the target building can be achieved.
Pages: 604 - 611