Results 171 to 180 of about 3,890,110 (215)
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Efficiency of Ventilation in Neonatal Pulmonary Maladaptation
Acta Paediatrica, 1987ABSTRACT. Lung physiology was studied in sixteen infants with pulmonary maladaptation (PMA) during the course of the disease and after clinical recovery. A sensitive nitrogen washout method was used. During the disease the infants showed reduced ventilatory efficiency and increased dead space. Total ventilation increased simultaneously, while alveolar
K, Sandberg +3 more
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Improving the efficiency of energy efficient ventilated facades
Экономика и предпринимательство, 2023В статье рассматривается устройство вентилируемого фасада. Вентилируемые стены устанавливаются быстро, а обслуживание минимально. Поэтому они являются практичным и целесообразным решением для создания наружных покрытий зданий. Не ограничиваясь вышесказанным, вентилируемые фасады успешно используются при перестройке различных зданий, которые, таким ...
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What is ventilation efficiency?
Building and Environment, 1981Abstract Various defintions of ventilation efficiency are examined. When using tracer gas techniques the definitions of a ventilation system's efficiency can be based on the slope of the tracer gas curves, or the ratio between concentrations, or the area under the curves.
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Energy and Buildings, 2003
Abstract Turbine ventilator is an equipment that uses natural wind force to bring out the rotation of the turbine and creates a negative pressure at the down-stream end of the pipeline to exhaust airflow. The form and designing concept are quite simple, yet it is ideal in practicality.
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Abstract Turbine ventilator is an equipment that uses natural wind force to bring out the rotation of the turbine and creates a negative pressure at the down-stream end of the pipeline to exhaust airflow. The form and designing concept are quite simple, yet it is ideal in practicality.
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Improving the efficiency of ventilation systems
Metallurgist, 2007This article analyzes the reasons for the reduction in the efficiency of ventilation systems at factories. Examples are presented to illustrate how the causes of reduced efficiency in existing ventilation systems are diagnosed, and ways of making the systems more efficient are discussed.
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Super-Efficient Mechanical Ventilation
Indoor and Built Environment, 2000A novel ventilation system has been installed in build ings constructed for the New Campus of the University of Nottingham. Super-efficient mechanical ventilation has been used as part of an integrated environmental strategy and operates with fan input powers below 0.5 WI -1 .S
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Highly Efficient Jet Ventilation
1989At the 1984 symposium “Anaesthesia-innovations in management” we described the method of pneumatic controlled circulation [1]. In this technique a jet insufflation of the ventilatory gases is used which must technique a jet insufflation of the ventilatory gases is used which must be adjusted synchronously with the pressure in the capillary meshwork ...
W. L. Den Dunnen, T. Mostert
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Application of Pipeline Ventilation Efficiency Test in Sanitary Ventilation Engineering
2019The detection of ductwork ventilation efficiency is a basic technical method and method for the effectiveness evaluation of occupational health protection engineering, and it is also a necessary process for the diagnosis of existing problems in the ventilation system.
Huijun Zhang, Shulin Zhou
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Cutting household ventilation to improve energy efficiency
BMJ, 2014If global emissions of greenhouse gases continue on their present trajectory, the Intergovernmental Panel on Climate Change (IPCC) projects that the world may be more than 4°C warmer in 2100 than in 1861-80. To hold warming to less than 2°C on average, the level often cited as the threshold of dangerous climate change, emissions must be reduced ...
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Numerical prediction of comfort and ventilation efficiency in ventilated rooms
1995The paper presents investigation of comfort and ventilation efficiency in a typically chemical laboratory room with two fume cupboards. The investigation is based on the detailed results obtained from the numerical solution of a system of seven partial differential equations on a numerical grid of 245000 points.
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