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Showing 1 to 15 of 15 for “"displacement ventilation"”.
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Floor-supply displacement ventilation system
… Therefore, it is necessary to provide a good ventilation system that can provide good indoor environment. To improve indoor air quality, displacement ventilation systems can work well. The system provides fresh air directly to the occupied zone. However, the existing floor-supply displacement …
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Scale model studies of displacement ventilation
Displacement ventilation is an air conditioning method that provides conditioned air to indoor environments with the goal to improve air quality while reducing energy consumption. This study investigates the performance of displacement ventilation systems in open plan office environments, focusing …
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Evaluation of displacement ventilation for use in high-ceiling facilities
… study was conducted to assess the performance of displacement ventilation in high ceiling facilities found in North America. Such areas include commercial and industrial manufacturing facilities often featuring high internal heat loads and contaminants associated with heat sources. These areas can …
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Determining thermal stratification in rooms under mixing and displacement ventilation
… of a typical office under both mixing and displacement ventilation were performed to study the effects of room geometry (height and area of the supply), ventilation parameters (supply momentum and heat gain intensity) and radiation heat transfer on the thermal stratification of the air and …
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A scale model study of displacement ventilation with chilled ceilings
Displacement ventilation is a form of air-conditioning which provides good air quality and some energy savings. The air quality is better than for a conventional mixed ventilation system. The maximum amount of cooling that displacement ventilation can provide whilst maintaining a comfortable space …
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A critical appraisal of the use of displacement ventilation in commercial buildings
… current design practice relating to the use of displacement ventilation in commercial buildings to assess the degree of success that has been achieved. The findings show that there is uncertainty in several areas of performance. The major area of concern is the inability of this method of …
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Energy and first costs analysis of displacement and mixing ventilation systems for U.S. buildings and climates
In the past two decades, displacement ventilation has been increasingly used in Scandinavia and Western Europe to improve indoor air quality and to save energy. By using a detailed computer simulation method, this study compared the energy consumption of a displacement ventilation system with that …
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Computational fluid dynamics modelling of displacement natural ventilation.
Natural ventilation is widely recognised as contributing towards low-energy building design. The requirement to reduce energy usage in new buildings has rejuvenated interest in natural ventilation. This thesis deals with computer modelling of natural displacement ventilation driven either by …
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Performance comparison of U.K. low-energy cooling systems by energy simulation
… an EnergyPlus user. Systems considered include displacement ventilation, traditional mixing variable air volume ventilation, night cooling, and natural ventilation. Several changes were made to the EnergyPlus source code to model these systems appropriately. Most notable are a displacement …
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Patient Room Design that Integrates the Personalized Ventilation System for Cross-Infection Control
… body of research that suggests that indoor ventilation strategies such as personalized ventilation systems my help reduce the spread of these viruses. While there are studies related to the efficacy of air movement from personalized ventilation, there are very few studies that explore how …
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A Study of Thermal Comfort and Cost Effectiveness of Stratum Ventilation
… comfort and cost effectiveness of stratum ventilation in subtropical Hong Kong Special Administration Region (HKSAR). The need for studying thermal comfort with various air distribution strategies becomes a significant issue recently due to climate change, increasing energy prices and the …
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Study of building material emissions and indoor air quality
… quality (IAQ) in a small office with different ventilation systems. The results show that displacement ventilation may not provide better IAQ than mixing systems if the VOC sources are from the floor. Further, our study shows sink effects from internal walls of gypsum board.
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Modeling contaminant exposure in a single-family house
… a progressively sensitive issue. Mechanical ventilation is a system increasingly implemented to respond to and aid these burgeoning trends to reduce the risk of overexposure to indoor pollutants. In this study, occupational exposure to household contaminants in a single-family house with …