Variation of temperature stratification during and after the human movement in displacement ventilation

Feng, Lu; Wu, Yan; Zhao, Yi; Li, Ruibin; Dong, Shoulong; Gao, Naiping

doi:10.1016/j.buildenv.2023.110426

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…Another study reported the impact of employees' behavior on indoor temperature stratification changes. Compared to sitting, there is an increase in temperature of approximately 1 to 2 • C from the floor up to 1 m in height when walking [25]. This increased temperature needs to be resolved by cooling, resulting in increased energy consumption in an active office environment.…”

Section: Recent Trends For Active Office Environmentmentioning

confidence: 99%

“…The heating and cooling setpoint temperatures were associated with varying thermal comfort; thus, the setpoint temperature was adjusted based on the specific activities. Based on previous studies, there was around 2 °C decrease during the transition from sedentary to standing and walking, respectively [21,25]; specifically, a decrease from 26 °C to 24 °C for standing and 26 °C to 22 °C for walking in the cooling season, and 23 °C to 21 °C for standing and 23 °C to 19 °C for walking in the heating season, were assumed. There is a small deviation between the reference and our setting, but we applied the round-off to make the integers as typical HVAC systems only require the integer.…”

Section: Simulation Settingsmentioning

confidence: 99%

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Investigation of Energy Consumption of Office Spaces with Active Workstations

Park,

Choi,

Talib

et al. 2024

Energies

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This study investigates the impact of an active workstation on heating and cooling energy consumption in commercial buildings. The improved performance and health of office workers are well-known and supported by several surveys and studies. However, the preferred and revised indoor air temperature for different activities of the employees, such as standing and walking, directly impacts the energy consumption of the building. Therefore, this study systematically quantifies the impact of indoor environments on building energy consumption using a simulation tool. Based on literature reviews with multidisciplinary fields, revised setpoint temperature, metabolic rate, and required outdoor air rate due to the level of active workstation (standing and walking) are applied to EnergyPlus reference building models. The impact on heating and cooling energy consumption is analyzed by considering several representative cities in the United States. Their average sensitivity was found to be 7.28% lower and 14.28% higher for heating and cooling energy, respectively. The total increment of $13,887 represents approximately 0.16% of the total profit of the corporation. This increment can be justified given the benefits to workers’ health, which include lower insurance costs and improved performance. This suggests that it is economically desirable to deploy active workstations widely.

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Section: Recent Trends For Active Office Environmentmentioning

confidence: 99%

Section: Simulation Settingsmentioning

confidence: 99%