A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Case Study Exploring the Influence of Diffuser Arrangement on Air Distribution Using Field Experiments and Computational Fluid Dynamics Simulations
https://orcid.org/0000-0003-4891-2503
https://orcid.org/0000-0003-3149-4747
Air distribution design plays a critical role in reducing HVAC energy consumption. Previous studies have suggested that placing supply and return diffusers very close to each other in overhead air-conditioning systems can lead to the immediate loss of cool air through the return diffusers without conditioning the air of the occupied region. There is a research gap in experimentally validating the same. Therefore, we performed a case study in the conference room of an office building in India using sensor readings and computational fluid dynamics (CFD) simulations to explore how the relative distance between diffusers influenced the air distribution in a zone and to suggest methods for rearranging the diffusers to improve the air distribution. Our experimental results showed that the air temperature at the return diffusers was lower than in the occupied region, which highlights that cool air was exiting through the return vents before effectively cooling the occupied zone. A CFD model of the room was developed and validated using the experimental results. The CFD simulation results showed that the presence of ceiling lights between the supply and return diffusers can delay the escape of cool air by a few minutes, thus slightly improving the air distribution. However, installing ceiling lights between the diffusers cannot be used as a strategy to reduce the loss of cool air through the return diffusers. Placing the diffusers at distances beyond the extent of the dispersion of the air jets from the supply inlets was found to improve the air distribution, and this strategy can be used to reduce the immediate escape of cool air through the return diffusers.
Case Study Exploring the Influence of Diffuser Arrangement on Air Distribution Using Field Experiments and Computational Fluid Dynamics Simulations
https://orcid.org/0000-0003-4891-2503
https://orcid.org/0000-0003-3149-4747
Air distribution design plays a critical role in reducing HVAC energy consumption. Previous studies have suggested that placing supply and return diffusers very close to each other in overhead air-conditioning systems can lead to the immediate loss of cool air through the return diffusers without conditioning the air of the occupied region. There is a research gap in experimentally validating the same. Therefore, we performed a case study in the conference room of an office building in India using sensor readings and computational fluid dynamics (CFD) simulations to explore how the relative distance between diffusers influenced the air distribution in a zone and to suggest methods for rearranging the diffusers to improve the air distribution. Our experimental results showed that the air temperature at the return diffusers was lower than in the occupied region, which highlights that cool air was exiting through the return vents before effectively cooling the occupied zone. A CFD model of the room was developed and validated using the experimental results. The CFD simulation results showed that the presence of ceiling lights between the supply and return diffusers can delay the escape of cool air by a few minutes, thus slightly improving the air distribution. However, installing ceiling lights between the diffusers cannot be used as a strategy to reduce the loss of cool air through the return diffusers. Placing the diffusers at distances beyond the extent of the dispersion of the air jets from the supply inlets was found to improve the air distribution, and this strategy can be used to reduce the immediate escape of cool air through the return diffusers.
Case Study Exploring the Influence of Diffuser Arrangement on Air Distribution Using Field Experiments and Computational Fluid Dynamics Simulations
https://orcid.org/0000-0003-4891-2503
https://orcid.org/0000-0003-3149-4747
Air distribution design plays a critical role in reducing HVAC energy consumption. Previous studies have suggested that placing supply and return diffusers very close to each other in overhead air-conditioning systems can lead to the immediate loss of cool air through the return diffusers without conditioning the air of the occupied region. There is a research gap in experimentally validating the same. Therefore, we performed a case study in the conference room of an office building in India using sensor readings and computational fluid dynamics (CFD) simulations to explore how the relative distance between diffusers influenced the air distribution in a zone and to suggest methods for rearranging the diffusers to improve the air distribution. Our experimental results showed that the air temperature at the return diffusers was lower than in the occupied region, which highlights that cool air was exiting through the return vents before effectively cooling the occupied zone. A CFD model of the room was developed and validated using the experimental results. The CFD simulation results showed that the presence of ceiling lights between the supply and return diffusers can delay the escape of cool air by a few minutes, thus slightly improving the air distribution. However, installing ceiling lights between the diffusers cannot be used as a strategy to reduce the loss of cool air through the return diffusers. Placing the diffusers at distances beyond the extent of the dispersion of the air jets from the supply inlets was found to improve the air distribution, and this strategy can be used to reduce the immediate escape of cool air through the return diffusers.
Case Study Exploring the Influence of Diffuser Arrangement on Air Distribution Using Field Experiments and Computational Fluid Dynamics Simulations
J. Archit. Eng.
Jacob, Jeslu Celine (author) / Pandit, Debapratim (author) / Sen, Joy (author)
2025-03-01
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2005
| British Library Online Contents | 2003