Next Article in Journal
Intentional Islanding Algorithm for Distribution Network Based on Layered Directed Tree Model
Next Article in Special Issue
Smart Control of Multiple Evaporator Systems with Wireless Sensor and Actuator Networks
Previous Article in Journal
On Variable Reverse Power Flow-Part I: Active-Reactive Optimal Power Flow with Reactive Power of Wind Stations
Previous Article in Special Issue
Phase Change Materials-Assisted Heat Flux Reduction: Experiment and Numerical Analysis
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessArticle
Energies 2016, 9(3), 122; doi:10.3390/en9030122

Enhanced Single-Sided Ventilation with Overhang in Buildings

1
Department of Energy and Environment System Engineering, University of Seoul, Seoul 02504, Korea
2
Department of Computational Science and Engineering, Yonsei University, Seoul 03722, Korea
3
Department of Mechanical and Information Engineering, University of Seoul, Seoul 02504, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Nyuk Hien Wong
Received: 1 January 2016 / Revised: 3 February 2016 / Accepted: 15 February 2016 / Published: 23 February 2016
(This article belongs to the Special Issue Energy Efficient Building Design 2016)
View Full-Text   |   Download PDF [9744 KB, uploaded 23 February 2016]   |  

Abstract

Enhancing the ventilation performance of energy-efficient buildings with single-sided openings is important because their ventilation performance is poor and strongly depends on the wind conditions. We considered an overhang as a potential building façade for improving the single-sided ventilation performance. We performed numerical simulations of three-dimensional unsteady turbulent flows over an idealized building with an overhang in order to investigate the effect of the overhang on the ventilation performance. Parametric studies were systematically carried out where the overhang length, wind speed, and wind direction were varied. The numerical results showed that the overhang drastically enhanced the ventilation rate in the windward direction regardless of the wind speed. This is because, for windward cases, the overhang produces a vortex with strong flow separation near the tip of the overhang, which promotes a net airflow exchange at the entrance and increases the ventilation rate. However, the ventilation rates for the leeward and side cases are slightly decreased with the overhang. Using an overhang with single-sided ventilation greatly reduces the local mean age of air (LMA) in the windward direction but increases it in the leeward direction. View Full-Text
Keywords: single-sided ventilation; overhang; ventilation rate; local mean age of air (LMA); unsteady Reynolds-averaged Navier-Stokes (URANS) single-sided ventilation; overhang; ventilation rate; local mean age of air (LMA); unsteady Reynolds-averaged Navier-Stokes (URANS)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Park, J.; Choi, J.-I.; Rhee, G.H. Enhanced Single-Sided Ventilation with Overhang in Buildings. Energies 2016, 9, 122.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top