The optimization of light-wells with integrating daylight and stack natural ventilation systems in deep-plan residential buildings: A case study of Tehran

2018 ◽  
Vol 18 ◽  
pp. 220-244 ◽  
Author(s):  
Amin alah Ahadi ◽  
Mahmoud Reza Saghafi ◽  
Mansoureh Tahbaz
Keyword(s):  
Natural Ventilation ◽  
Residential Buildings ◽  
Ventilation Systems

scholarly journals Numerical Assessment of Seven Ventilation Systems for Social Residential Buildings based on Indoor Air Quality and Energy Consumption

2021 ◽  
Vol 2069 (1) ◽  
pp. 012181
Author(s):  
Guillaume Sérafin ◽  
Marc O. Abadie ◽  
Patrice Joubert
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Natural Ventilation ◽  
Residential Buildings ◽  
Living Room ◽  
Internal Sources ◽  
Controlled Mechanical Systems ◽  
Ventilation Systems

Abstract This work presents a modelling approach for evaluating ventilation systems for their ability to provide good indoor air quality in dwellings. Infiltration and ventilation rates are defined by the conventional French 3CL-DPE standard. The case study is a two-bedroom apartment with a shared or separate kitchen and living room. Three natural ventilation options and four mechanical ventilation systems are compared with respect to exposure to PM2.5, NO2 and formaldehyde. Pollutant concentration levels are assessed in each room based on a scenario of daily occupancy, average annual outdoor concentrations and internal sources. The daily exposure of the occupants to the targeted substances allows the comparison of ventilation systems on the basis of the ULR-QAI index developed at LaSIE laboratory from La Rochelle University. For this case study, it results that controlled mechanical systems are much more efficient than natural ventilation systems, especially in the case of an open-plan kitchen.

scholarly journals Proposing Alternative Solutions to Enhance Natural Ventilation Rates in Residential Buildings in the Cfa Climate Zone of Rasht

2021 ◽  
Vol 13 (2) ◽  
pp. 679
Author(s):  
Roya Aeinehvand ◽  
Amiraslan Darvish ◽  
Abdollah Baghaei Daemei ◽  
Shima Barati ◽  
Asma Jamali ◽  
...  
Keyword(s):  
Natural Ventilation ◽  
Residential Buildings ◽  
Residential Building ◽  
Ventilation Rate ◽  
Humid Climate ◽  
The Sustainable Development ◽  
Passive Strategies ◽  
Development Goals ◽  
Ventilation Rates ◽  
Ventilation Systems

Today, renewable resources and the crucial role of passive strategies in energy efficiency in the building sector toward the sustainable development goals are more indispensable than ever. Natural ventilation has traditionally been considered as one of the most fundamental techniques to decrease energy usage by building dwellers and designers. The main purpose of the present study is to enhance the natural ventilation rates in an existing six-story residential building situated in the humid climate of Rasht during the summertime. On this basis, two types of ventilation systems, the Double-Skin Facade Twin Face System (DSF-TFS) and Single-Sided Wind Tower (SSWT), were simulated through DesignBuilder version 4.5. Then, two types of additional ventilation systems were proposed in order to accelerate the airflow, including four-sided as well as multi-opening wind towers. The wind foldable directions were at about 45 degrees (northwest to southeast). The simulation results show that SSWT could have a better performance than the aforementioned systems by about 38%. Therefore, the multi-opening system was able to enhance the ventilation rate by approximately 10% during the summertime.

Smoke Flow Control in Tunnels Using Natural Ventilation

2018 ◽  
Author(s):  
Mark P. Colino ◽  
Elena B. Rosenstein
Keyword(s):  
Natural Ventilation ◽  
Smoke Control ◽  
Smoke Movement ◽  
Design Elements ◽  
Industry Standards ◽  
Emergency Ventilation ◽  
Design Requirements ◽  
Smoke Control System ◽  
Ventilation Systems

This paper provides an overview of the design of natural ventilation systems to control smoke movement in rail tunnels. The paper discusses the current industry standards and design requirements for tunnel emergency ventilation systems, and then addresses the various technical elements that are used to design such systems. These technical elements include parameters in the direct control of the designer, as well as those that are beyond the control of the designer. The paper also presents a case study where various physical design elements are utilized to create a working natural ventilation smoke control system for a short rail tunnel.

scholarly journals Review of Heat Recovery Technologies for Building Applications

Energies ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1285 ◽  
Author(s):  
Qi Xu ◽  
Saffa Riffat ◽  
Shihao Zhang
Keyword(s):  
Heat Recovery ◽  
High Performance ◽  
Natural Ventilation ◽  
Residential Buildings ◽  
Global Climate ◽  
Real Life ◽  
Thermal Conductance ◽  
Thermoelectric Module ◽  
Residential Building ◽  
Ventilation Systems

In recent years, interest in heat recovery systems for building applications has resurged due to concerns about the energy crisis and global climate changes. This review presents current developments in four kinds of heat recovery systems for residential building applications. A extensive investigation into the heat recovery integrated in energy-saving systems of residential buildings is also covered, including passive systems for building components, mechanical/natural ventilation systems, dehumidification systems, and the thermoelectric module (TE) system. Based on this review, key issues have been identified as follows: (1) The combination of heat recovery and energy-efficient systems could be considered as a promising approach to reduce greenhouse gas emissions and make residential buildings meet high performance and comfort requirements. However, real-life evaluation of these systems with economic analysis is insufficient; (2) When heat recovery is applied to mechanical ventilation systems, issues such as pressure leakages and air shortcuts should be addressed; (3) The heat pipe heat recovery system enjoys more potential in being combined with other sustainable technologies such as thermoelectric modules and solar energy systems due to its advantages, which include handy manufacturing and convenient maintenance, a lack of cross contamination, and greater thermal conductance.

scholarly journals Análisis teórico de una chimenea solar con tres canales de flujo de aire

2019 ◽  
pp. 13-19
Author(s):  
Angel Tlatelpa-Becerro ◽  
Ramiro Rico-Martínez ◽  
Gustavo Urquiza-Beltrán ◽  
Elva Lilia Reynoso-Jardón
Keyword(s):  
Natural Ventilation ◽  
Single Channel ◽  
Residential Buildings ◽  
Air Flow ◽  
Tropical Region ◽  
Solar Chimney ◽  
Climatic Zones ◽  
The Cost ◽  
Energy Balances ◽  
Ventilation Systems

A solar chimney configuration consisting of three air flow channels divided by two metallic plate, placed in the center of the chimney between two acrylic covers, leading to symmetric air flow, is proposed as an alternative for the design of natural ventilation systems for buildings in tropical and subtropical climatic zones The solar chimney dimensions are 2.0 m height, 1.0 m width, and gap between channels of 0.30 m. These dimensions are appropriate for the design of ventilation systems for residential buildings in central México. A Numerical simulation using the global mass and energy balances in steady state was utilized to evaluate the efficacy of the proposed configuration. The temperature profiles, calculated for a typical hot day in a tropical region, reveal that the configuration is more efficient than the single channel chimney, achieving thermal efficiency values near 75%. This solar chimney configuration can be used with better results than the traditional design as an alternative for natural ventilation systems in residential buildings without a significant increase in the cost of the residence investment.

scholarly journals Natural ventilation potential for residential buildings in a densely built-up and highly polluted environment. A case study

2019 ◽  
Vol 138 ◽  
pp. 340-353 ◽  
Author(s):  
Vincenzo Costanzo ◽  
Runming Yao ◽  
Tiantian Xu ◽  
Jie Xiong ◽  
Qiulei Zhang ◽  
...  
Keyword(s):  
Natural Ventilation ◽  
Residential Buildings ◽  
Polluted Environment

scholarly journals Analysis of the systems of ventilation of residential houses of Ukraine and Estonia

2017 ◽  
Vol 12 (2) ◽  
pp. 23-30
Author(s):  
Olena Savchenko ◽  
Vasyl Zhelykh ◽  
Hendrik Voll
Keyword(s):  
Natural Ventilation ◽  
Residential Buildings ◽  
Ventilation System ◽  
National Standards ◽  
Normative Documents ◽  
High Rise ◽  
Exhaust Ventilation ◽  
European Standards ◽  
Ventilation Systems

Abstract The most common ventilation system in residential buildings in Ukraine is natural ventilation. In recent years, due to increased tightness of structures, an increase in the content of synthetic finishing materials in them, the quality of microclimate parameters deteriorated. One of the measures to improve the parameters of indoor air in residential buildings is the use of mechanical inflow and exhaust ventilation system. In this article the regulatory documents concerning the design of ventilation systems in Ukraine and Estonia and the requirements for air exchange in residential buildings are considered. It is established that the existing normative documents in Ukraine are analogous to European norms, which allow design the system of ventilation of residential buildings according to European standards. However, the basis for the design of ventilation systems in Ukraine is the national standards, in which mechanical ventilation, unfortunately, is provided only for the design of high-rise buildings. To maintain acceptable microclimate parameters in residential buildings, it is advisable for designers to apply the requirements for designing ventilation systems in accordance with European standards.

scholarly journals Mejoras en el desempeño energético de edificios en verano mediante la integración de envolventes ventiladas en fachadas norte y cubiertas. El caso de Mendoza, Argentina

2020 ◽  
Vol 10 (2) ◽  
pp. 94-105
Author(s):  
Julieta Balter ◽  
Carolina Ganem ◽  
Gustavo Barea
Keyword(s):  
Natural Ventilation ◽  
Energy Savings ◽  
Residential Buildings ◽  
Heat Fluxes ◽  
High Solar Radiation ◽  
Efficiency Measures ◽  
Reduce Energy Consumption ◽  
Two Stages ◽  
The City

The proposal of energy efficiency measures in the residential sector in Argentina requires analyzing the architectonic possibilities of building rehabilitation using technologies that reduce energy consumption, that are feasible to implement locally. In regions with high solar radiation levels, as is the case of the city of Mendoza, heat fluxes transmitted inside can be reduced by the natural ventilation of the layers in the envelope, both on facades and roofs, thus obtaining significant savings in consumption for cooling purposes. This work evaluates the potential for improvement with the integration of ventilated envelopes. The work methodology is structured in two stages: i) survey of residential buildings by morphological typology and analysis of rehabilitation possibilities with ventilated facades, considering the exposed envelope surfaces by orientation; ii) simulation of a case study - previously validated with onsite measurements - using the EnergyPlus software. On integrating ventilated facades and roofs important energy savings of around 32% were achieved, considering the building without users (unoccupied). In the case of units on the top floor, with roofs exposed to the outside, energy savings of 260% were recorded.

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