Abstract
HVAC diffusers have been developed that have dual functions for task and ambient air conditioning. In this study, we evaluated comfort according to air supply mode, strong or fluctuation mode, through a subjective experiment. We found that the fluctuation mode maintained greater comfort for longer compared with the strong mode under continuous airflow exposure. Therefore, the fluctuation mode is considered suitable for long-duration use. Moreover, field measurements in an actual office showed that the fluctuation mode was superior in terms of both comfort and energy saving compared with conventional air conditioning.
Highlights
IntroductionIn order to deal with this, it is expected to develop and use a system that can realize different thermal environments according to individual feeling and work situation
In recent office buildings, various changes such as diversification of work, free address system, lighting control using human sensor, power saving by OA equipment equipped with sleep mode, etc. are seen
In our measurements of the properties of task fan airflow, we confirmed the fluctuation of axial flow in fluctuation mode compared to normal operation modes
Summary
In order to deal with this, it is expected to develop and use a system that can realize different thermal environments according to individual feeling and work situation. Task and ambient air conditioning system is one of systems that can solve the problem, and being studied by many researchers1), 2), 3). HVAC diffusers have been developed that have dual functions for task and ambient air conditioning. We conducted a verification experiment, subjective experiment, and field measurements in an actual office to understand the properties of the airflow from a task air conditioning system equipped with a new fluctuation mode. This paper describes the properties of this mode and evaluates the effects of the different air supply modes on comfort
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