Study on Emporium Airflow Optimization in View of Cooling Load Distribution Indoor
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Cooling load
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To clarify effects of localized airflow on thermal comfort, physiological and psychological responses of the total of 960 female subjects to localized airflow was studied in a climate chamber. Experiments were conducted in summer under 60 kinds of the following conditions : four air temperatures (25℃, 27.5℃, 30℃ and 32.5℃), six types of localized airflow (a uniform airflow, four oscillating airflow and a randomly fluctuating airflow reproducing a natural wind) with average velocity of 1.0m/s and three airflow temperatures (equal to, 5℃ and 10℃ lower than room air temperature). The comfortable zone of combined air temperature and airflow temperature became narrow and shifted to high room temperature and high airflow temperature according to the increase of maximum airflow velocity.
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The air parameters of fine manipulation room were assayed.The results were as follows: The new wind quantity of air conditioner room was not adequate and its CO 2 content was also higher than natural fine manipulation room; the distribution of the air parameters such as temperature, relative humidity, airflow speed and CO 2 content was uneven; the type of delivering wind affected the airflow form. It was put forward that the airflow factors of fine manipulation room such as new wind quantity, airflow speed and the airflow form greatly affected environment of fine manipulation.
Air movement
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ABSTRACT THE Michigan State deep-bed drying model for cereal grains was modified and utilized to investigate rough rice drying in a small fixed-bed dryer. Comparisons were made between reversing direction airflow and one direction airflow drying method. The optimal reversed time interval was found to be approximately 54 percent of the total drying time required for one direction airflow method. The simulation results indicated that the reversing direction airflow significantly reduced the final grain moisture gradient. However, the energy consumption increased up to 10 percent and the drying efficiency was slightly lower for reversing direction airflow as compared to one direction airflow drying.
Reversing
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Creating a technique for artificially producing accurate time and intensity varying airflow can help us better understand the influence of airflow on speech perception. Such a technique would allow differentiation between airflow from stop release bursts, affricates, and fricatives. While customized high-speed short-burst airflow systems for testing somatosensory responses have been available since 1987 (Hashimoto, 1987; Mizobuchi, et al., 2000), the systems were difficult to obtain outside of Japan, so researchers studying the effects of airflow on speech perception began with solenoid operated on/off airflow devices (Gick & Derrick, 2009, Gick, et al., 2010). These systems were adequate to producing artificial airflow for aspirated stops such that correctly time-aligned airflow enhanced their perception in noisy environments. Recently, however, we created a custom airflow production system, called Aerotak . Aerotak itself relies on Murata's Microblower for airflow. The Microblower is a commercially available 20x20x1.85mm piezoelectric air pump with a maximum 0.8 l/m flow, 19.38 cm/h2o pressure, and an ability to change air-flow from 10% to 90% max cm/h20 in approximately 90 milliseconds. Aerotak allows researchers to produce artificial approximations of continuously varying airflow in speech (Derrick, et al. 2014a). We used Aerotak to demonstrate that airflow can enhance perception of English stops and fricatives (Derrick, et al. 2014b). We have also designed a custom mask-less airflow estimation system that allows accurate recordings of changes in turbulent speech airflow from the lips. In this presentation and paper, we will describe how to record airflow from speech, process the data for use with Aerotak , produce artificial speech airflow, and confirm the quality of the artificial production using our mask-less airflow system. Examples will include aspirated stops, fricatives and affricates from English speech.
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There are two unidirectional patterns in OR: horizontal unidirectional airflow and vertical unidirectional airflow. In order to compare their purification effect, computational fluid dynamics (CFD) was applied to simulate the two airflow patterns and the results are as following: Firstly, the number of the particles that hit the surgical key areas in the case of the horizontal unidirectional airflow is obviously less than that in the case of the vertical unidirectional airflow in the condition of the same air volume. Secondly, the number of the particles that hit the incisions will be satisfactory at a velocity of 0.25~0.3m/s in the case of the vertical unidirectional airflow while a velocity of 0.28~0.37m∕s in the case of the horizontal unidirectional airflow. Thirdly, the number of indoor residual particles in the case of the horizontal airflow is obviously less than that in the case of the vertical airflow in the case of the same air volume.
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Thermal sensation
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An airflow distribution in an ventilation network is changed when an airway resistance in the network is changed by an airflow regulator damaging or an airway collapsing. The occurrence of an abnormal airway will be found by analysing the airflow changes created in the network, if airflows are monitored in several airways. This paper describes the newly developed methods to locate an abnormal airway and estimate the changed value of resistance by means of analysis of the measured airflow data.In the first method the ventilation network is analyzed, measured airflow data being introduced, and the pressure distribution thereby obtained are examined, which enables us to detect the place creating an abnormal airflow resistance and to evaluate the change.The second method utilises a data base of airflow distributions which are calculated in advance for various combination of network resistances.In the case of the occurence of an abnormal airway, it is generally impossible to get the accurate airflow distribution by an ordinary method for ventilation analysis method, because the value of the changed resistance there is unknown. However, it is proved that the correct airflow distribution can be obtained, if measured airflow data are introduced in the ventilation network analysis method proposed in this paper.
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ABSTRACT RESISTANCE to airflow was measured in cleaned and uncleaned wheat and cleaned barley. At an air velocity of 0.077 m/s resistances to vertical airflow compared with horizontal airflow were up to 60% higher for wheat and 115% for barley. Based on an air velocity of 0.077 m/s airflow resistances for layer filling (e.g. similar to filling a bin with a spreader) were higher than end filling (e.g. similar to filling a bin with stationary spout) by 25 to 35% for vertical airflow and 50 to 75% for horizontal airflow.
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