Investigating chillers' energy consumption and energy saving analysis of a primary school in Ho Chi Minh city, Vietnam

Tóm tắt

Air conditioning and chillers contributed much of the total building energy consumption. In this study, we investigated the impacts of the chillers’ COP, the indoor air temperature, the air distribution approach, the load distribution scheme of the chiller system and the outdoor air temperature that influence the energy consumption of the sample primary school-installed water-cooled chiller system in Ho Chi Minh City, Vietnam. The EUI values of the sample building's installed water-cooled chiller system ranged from 115.25 kWh/m² to 155.55 kWh/m². While the energy consumption of the water-cooled chiller system showed a positive correlation with the outdoor air temperature, it expressed a negative relationship with the indoor air temperature and the chiller’s COP. Generally, the water-cooled chiller system consumes less power with the VAV system than the CAV system and less power under the optimal load distribution scheme than the uniform load distribution scheme. The total annual energy-saving of the chiller system depends on the choice of chillers’ COP, load distribution scheme, air distribution approach, and the set point of indoor air temperature, ranging from 7.43% to 41.62%.