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.

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 EVALUATING NATURAL VENTILATION PROVISIONS AND OCCUPANTS’ VENTILATION BEHAVIOR IN FIVE TERRACE HOUSING TYPES IN PUTRAJAYA, MALAYSIA

2016 ◽  
Vol 10 (2) ◽  
pp. 130 ◽  
Author(s):  
Ibiyeye Aminat Idowu ◽  
Zalina Shari ◽  
Mohamad Fakri Zaky Jaafar
Keyword(s):  
Computer Simulations ◽  
Natural Ventilation ◽  
Residential Buildings ◽  
Humid Climate ◽  
Level Of Satisfaction ◽  
House Design ◽  
Hot Humid Climate ◽  
Ventilation Rates

This study investigates the natural ventilation provisions of residential buildings in the hot-humid climate of Putrajaya as well as the occupants’ utilization and overall satisfaction of these provisions. Five terrace house design types were selected for the study and natural ventilation (NV) provisions were identified through acquired building documents. Computer simulations were carried out on all house types to determine the ventilation rates delivered by the NV provisions. Furthermore, a total of 298 households from the selected house types were surveyed. Two house types were found not to comply with the Uniform Building By-Law (UBBL) governing NV provisions in Malaysia and those house types that complied were found to exhibit higher ventilation rates. Occupants’ level of satisfaction when utilising NV was found to be significantly related to opening sizes complying with UBBL, longer duration of opening windows, and occupants’ means of achieving comfort. This paper informs designers on the importance of complying with the required law governing NV in residential buildings. It also highlights the need for a strict effective enforcement of UBBL compliance for the purpose of building approvals.

Measurement of Natural Ventilation Rate in a Japanese Residential Building

2008 ◽  
Vol 7 (1) ◽  
pp. 37-47 ◽  
Author(s):  
Shigeki Nishizawa ◽  
Takao Sawachi ◽  
Hiromi Habara ◽  
Hironao Seto
Keyword(s):  
Natural Ventilation ◽  
Residential Building ◽  
Ventilation Rate

Wind-Driven Natural Ventilation in an Areaway-Attached Basement with a Single-Sided Opening for Residential Purposes

2011 ◽  
Vol 383-390 ◽  
pp. 5344-5349
Author(s):  
Zhen Bu
Keyword(s):  
Natural Ventilation ◽  
Ventilation Rate ◽  
Navier Stokes ◽  
Eddy Simulation ◽  
Large Eddy ◽  
Effective Ventilation ◽  
The Mean ◽  
Ventilation Rates ◽  
Les Model ◽  
Good Agreement

This paper discusses the sustainability of the areaway-attached basement concept with the attentions focused on wind-driven single-sided natural ventilation. First, numerical simulations were performed on an areaway-attached basement with a single-sided opening. Two CFD approaches: Reynolds averaged Navier-Stokes (RANS) and large-eddy simulation (LES) were used and compared with the previous experimental results of effective ventilation rate. A good agreement between the measurement and LES model was found and RANS model tends to underestimate the ventilation rates. Furthermore, Based on LES with the inflow turbulent fluctuations, the mean airflow patterns within and around the areaway-attached basement was investigated for different wind incidence angles to examine the influences of wind direction on ventilation performances.

scholarly journals The Effect of Balcony to Enhance Natural Ventilation in Local Houses in Mazandaran Province

2017 ◽  
Vol 6 (3) ◽  
pp. 894
Author(s):  
Azadeh Mahmoudi Kohneh Rood Posht ◽  
Khosro Daneshjoo ◽  
Seyed Majid Mofidi Shemirani
Keyword(s):  
Natural Ventilation ◽  
Residential Buildings ◽  
Regional Climate ◽  
Vernacular Architecture ◽  
Maximum Level ◽  
Mazandaran Province ◽  
The Caspian Sea ◽  
Humid Climate ◽  
Climate Classification ◽  
Physical Form

<p>Utilization of natural ventilation in buildings has a long history. Architecture has been trying to response to weather conditions all the time. Wind catcher, mashrabiya, portico and iwan are some examples of climate designs in vernacular architecture which have shown the importance of natural ventilation since a long time ago. The efficiency scope of natural ventilation when used with other cooling techniques will be more widespread. Today, designing desirable buildings using natural ventilation requires knowing theoretical foundations and a detailed study based on new knowledge regarding the feasibility of the use of components design and equipment related to natural ventilation. The present research aims to offer architects some design solutions in order to take advantage of natural ventilation in buildings using the vernacular architecture. Through matching features of functional spaces in local houses with climatic characteristics of regions around the Caspian sea (Mazandaran province) and determining the pattern used in these spaces in housing areas, the present study seeks to answer this question: “Are types of local houses in regions with moderate and humid climate in Iran (Mazandaran) consistent with regional climate in terms of patterns applied in internal functional spaces? How do regional climate features affect physical form of houses?”</p><p>The results show that there is a direct and consistent relationship between vernacular architectural features of Mazandaran province and climate classification and regional climate. It also enhances home comfort in summer and finally, it can be concluded that local houses are built based on the climate classification and environment context, and natural ventilation is the most important factor affecting the conditions which improve environmental comfort. The present research provides some guidelines for the architectural design of residential buildings in regions with moderate and humid climate with the aim of achieving maximum level of natural ventilation.  Also, in order to exploit the potential of natural ventilation, the results of the research will help architect select optimal designing parameters in harmony with the regional climate. </p>

scholarly journals Thermal Performance of a High-Rise Residential Building with Internal Courtyard in Tropical Climate

2018 ◽  
Vol 3 (7) ◽  
pp. 357
Author(s):  
Lobna Hassan Ali Hassan Elgheriani ◽  
Parid Wardi ◽  
AbdulBasit Ali Ali Ahmed
Keyword(s):  
Thermal Performance ◽  
Indoor Environment ◽  
Natural Ventilation ◽  
Residential Buildings ◽  
Residential Building ◽  
Building Design ◽  
Energy Performance ◽  
Significant Feature ◽  
High Rise ◽  
Passive Design

Natural ventilation is an effectual passive design approach to create a better indoor thermal condition as well as energy efficiency. The primary goal of building design is providing a healthy and comfortable indoor environment titled as sustainable architecture. Literature suggests that the significant feature that alteration has to take place on for better energy performance is the envelope design. This paper aims to augment the Window to Wall Ratio (WWR), orientation and courtyard corridor size for improving the design of naturally ventilated courtyard high-rise residential buildings. Briefly, the findings indicate that contending with WWR, orientation and courtyard corridor size could increase the potential of improving its natural ventilation and thus, thermal performance.

scholarly journals Identification of Energy Efficiency Improvement Measures of an Existing Residential Building Using Audit-Assisted Energy Simulation and Analysis

2021 ◽  
Vol 12 (1) ◽  
pp. 18
Author(s):  
Farrukh Arif ◽  
Rabia Khalid ◽  
Nida Azhar
Keyword(s):  
Energy Cost ◽  
Energy Efficient ◽  
Natural Ventilation ◽  
Residential Buildings ◽  
Residential Building ◽  
Energy Performance ◽  
Information Modeling ◽  
Energy Efficiency Improvement ◽  
Improvement Measures ◽  
Potential Improvement

Depleting energy sources are forcing humans to preserve energy and utilize it wisely. Globally, researchers are working to find ways to manage the energy crisis. Residential buildings are considered to be in the most energy demanding sector. Therefore, efforts are being made to reduce the increasing energy consumption and make the buildings energy efficient. The paper focuses on finding ways to retrofit the existing residential buildings into energy efficient buildings. This study evaluated the energy performance of a G+2 residential building with a total of 3 floors covering an area of 991.68 sq. meters, to identify relevant potential improvement measures. An energy analysis of the building was performed using information modeling assisted with energy audit data for accurate and realistic analysis. It was found that there is potential for the reduction of the annual energy usage and annual energy cost up to 2.33% and 4.54% respectively, by making improvements in the window to wall ratio. Another potential energy cost saving of 14.8% can be achieved by changing Heating, Ventilation, Air Conditioning (HVAC) type, and 7.62% of a reduction in cost can be achieved through modification in lighting fixtures. Moreover, installing solar photovoltaic panels can save up to PKR 1 million, and natural ventilation could result in saving more than PKR 0.2 million annually.

scholarly journals Humidity-Sensitive, Demand-Controlled Ventilation Applied to Multiunit Residential Building—Performance and Energy Consumption in Dfb Continental Climate

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6669
Author(s):  
Jerzy Sowa ◽  
Maciej Mijakowski
Keyword(s):  
Energy Consumption ◽  
Energy Savings ◽  
Residential Buildings ◽  
Residential Building ◽  
Primary Energy ◽  
Controlled Ventilation ◽  
Carbon Dioxide Concentrations ◽  
Demand Controlled Ventilation ◽  
Continental Climate ◽  
Ventilation Systems

Humidity-sensitive, demand-controlled ventilation systems have been in use for many years in regions with oceanic climates. Some attempts have been made to apply this technology in Poland, which has a continental climate. This article evaluates the performance and energy consumption of such a system when applied in an eight-floor, multiunit, residential building, i.e., the virtual reference building described by the National Energy Conservation Agency (NAPE), Poland. Simulations using the computer program CONTAM were performed for the whole heating season based upon the climate in Warsaw. Besides passive stack ventilation, that served as a reference, two ventilation systems were studied: one standard and one “hybrid” system with additional roof fans. This study confirmed that the application of humidity-sensitive, demand-controlled ventilation in multiunit residential buildings in a continental climate (Dfb) led to significant energy savings (up to 11.64 kWh/m2 of primary energy). However, the operation of the system on higher floors was found to be ineffective. Ensuring consistent operation of the system on all floors required supplementary fans. The introduction of a hybrid mode reduced carbon dioxide concentrations by approximately 32% in the units located in the upper part of the building. The energetic effect in such cases depends strongly on the electricity source. In the case of the national energy grid, savings of primary energy would be relatively low, i.e., 1.07 kWh/m2, but in the case of locally produced renewable energy, the energy savings would be equal to 5.18 kWh/m2.

scholarly journals A Grey Box Modeling Method for Fast Predicting Buoyancy-Driven Natural Ventilation Rates through Multi-Opening Atriums

2019 ◽  
Vol 11 (12) ◽  
pp. 3239 ◽  
Author(s):  
Peng Xue ◽  
Zhengtao Ai ◽  
Dongjin Cui ◽  
Wei Wang
Keyword(s):  
Natural Ventilation ◽  
Simulated Data ◽  
Ventilation Rate ◽  
Modeling Method ◽  
Predictive Equation ◽  
Evaluation Time ◽  
Ventilation Performance ◽  
Ventilation Rates ◽  
Semi Empirical ◽  
Key Parameter

The utilization of buoyancy-driven natural ventilation in atrium buildings during transitional seasons helps create a healthy and comfortable indoor environment by bringing fresh air indoors. Among other factors, the air flow rate is a key parameter determining the ventilation performance of an atrium. In this study, a grey box modeling method is proposed and a prediction model is built for calculating the buoyancy-driven ventilation rate using three openings. This model developed from Bruce’s neutral height-based formulation and conservation laws is supported with a theoretical structure and determined with 7 independent variables and 4 integrated parameters. The integrated parameters could be estimated from a set of simulated data and in the results, the error of the semi-empirical predictive equation derived from CFD (computational fluid dynamics) simulated data is controlled within 10%, which indicates that a reliable predictive equation could be established with a rather small dataset. This modeling method has been validated with CFD simulated data, and it can be applied extensively to similar buildings for designing an expected ventilation rate. The simplicity of this grey box modeling should save the evaluation time for new cases and help designers to estimate the ventilation performance and choose building optimal opening designs.

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