دانلود رایگان مقاله لاتین حالت تهویه ستون از سایت الزویر
عنوان فارسی مقاله:
مطالعه تجربی بر روی ویژگی جریان هوای حالت تهویه ستون مربعی شکل
عنوان انگلیسی مقاله:
Experimental study on airflow characteristics of a square column attached ventilation mode
سال انتشار : 2016
برای دانلود رایگان مقاله حالت تهویه ستون اینجا کلیک نمایید.
مقدمه انگلیسی مقاله:
1. Introduction
Indoor air distribution determines the diffusion of ventilated air, therefore, affecting indoor air quality and human comfort. Two different ventilation patterns are often used to describe air movement within closed environments, namely Mixing Ventilation (MV) and Displacement Ventilation (DV) [1]. However, MV systems always exhibit a poor ventilation performance [2], and despite their large market share they have low energy efficiency [3]. On the other hand, DV also suffers from some drawbacks such as the large vertical temperature difference, the big air supply inlet, and the inefficiency in the control of floor level contaminants [4,5]. Besides, to avoid the draft sensation, DV systems can only meet moderate cooling loads [6]. To overcome these problems, a series of new ventilation systems have been studied and used. Karimipanah et al. proposed the Impinging Jet Ventilation (IJV) system based on a vertical wall attached mode [7], which has been widely studied in the following years. Karimipanah et al. focused on evaluating the performance of an IJV system by comparing it with a DV system, and they demonstrated that the IJV system can provide more effective ventilation and more uniform velocity distribution in the occupants' zone [8,9]. Chen et al. discussed a number of important factors influencing the performance of the IJV system [10]. In addition, they also analyzed the impact of the shape of air supply device, supply height, supply airflow rate and supply air temperature on draught discomfort and temperature stratification in an office environment equipped with the IJV system [11]. Yao et al. studied the flow behavior of an isothermal impinging jet in a closed cabin, and improved the performance of the IJV system by using a multi-scale analysis technique based on empirical mode decomposition [12]. Melikov et al. developed the Personalized Ventilation (PV) to control the local building environment [13], and found that PV combined with chilled ceiling can protect occupants from the crossinfection [14]. Yang compared PV, MV and DV, and found PV systems have the potential to maintain a healthier environment at each workstation [15]. With individually controlled microenvironments, PV also has the potential to satisfy more occupants [16]. Makhoul et al. used CFD to analyze the energy saving potential of PV systems, demonstrating that PV reduced energy saving by up to 13% with respect to a conventional MV system [17]. Furthermore, the localized air conditioning system reduced energy consumption by up to 34% using a low-mixing ceiling-mounted PV system [18]. Chen et al. concluded that increasing the ambient temperature is potentially helpful for the decrease of energy consumption in a PVsystem, and the best results so far have been obtained with an ambient temperature of 26 C [19].
برای دانلود رایگان مقاله حالت تهویه ستون اینجا کلیک نمایید.
کلمات کلیدی:
Field study on occupant comfort and the office thermal environment in ... onlinelibrary.wiley.com/doi/10.1111/j.1600-0668.2005.00337.x/abstract by A Melikov - 2005 - Cited by 95 - Related articles Apr 12, 2005 - A. Melikov Centre for Indoor Environment and Energy, Technical University of Denmark, B.402, 2800 Kgs Lyngby, Denmark Tel.: +45 45 25 ... Performance Evaluation of an Integrated Personalized Ventilation ... https://www.researchgate.net/.../262051709_Performance_Evaluation_of_an_Integrated... Nov 28, 2016 - Personalized ventilation (PV) aims to supply conditioned outdoor air .... on airflow characteristics of a square column attached ventilation mode. Academic paper: Comparing Mixing and Displacement Ventilation in ... https://www.researchgate.net/.../299413204_Comparing_Mixing_and_Displacement_Ve... Oct 17, 2016 - While mixing ventilation (MV) and displacement ventilation (DV) are ... on airflow characteristics of a square column attached ventilation mode. Experimental and simulated energy performance of a personalized ... https://www.researchgate.net/.../285579174_Experimental_and_simulated_energy_perfo... This paper presents the energy performance of a personalized ventilation (PV) ...... study on airflow characteristics of a square column attached ventilation mode. Designing a Good Ventilation System | GreenBuildingAdvisor.com www.greenbuildingadvisor.com/blogs/dept/.../designing-good-ventilation-system Jun 15, 2009 - ASHRAE's residential ventilation standard (Standard 62.2) sets the minimum ... a 2,000-square-foot house with three occupants requires 83 cfm of ... or an energy-recovery ventilator (ERV) connected to a dedicated duct system. .... the furnace will supply a 7% outside air fraction during ventilation mode. Scientific American: Supplement https://books.google.com/books?id=2wA_AQAAMAAJ 1894 - Science The motive column in artificial ventilation is produced in three distinct ways: First, ... be 4/2 x 640 = 861 then the dimension of the side of a square pillar' Fm. 3. ... soft fire-clay bottom, room and illar would certainly be the best mode of working. .... the glass and gauze cylinders. and to which are attached the tile and hand ring. The Colliery Engineer ... https://books.google.com/books?id=TZo5AQAAMAAJ 1894 - Coal mines and mining In natural ventilation, however, the motive column varies, if it depends on the ... soft fire-clay bottom, room and pillar would certainly be the best mode of working. ... then the dimension of the side of a square pillar should be ;/ 640 = 25 yards on .... glass and gauze cylinders, and to which are attached the tile and hand ring.
