A review on natural ventilation applications through building façade components and ventilation openings in tropical climates

Aflaki, Ardalan; Mahyuddin, Norhayati; Mahmoud, Zakaria Alcheikh; Baharum, Mohamad Rizal

doi:10.1016/j.enbuild.2015.04.033

Cited by 208 publications

(101 citation statements)

References 45 publications

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“…Ventilation is expected to help replenish indoor oxygen while simultaneously reducing concentrations of CO 2 and other bioeffluents and pollutants . The air exchange can be done naturally through the opening of doors, windows and sometimes through other building openings, or by mechanical equipment …”

Section: Introductionmentioning

confidence: 99%

“…[33][34][35] The air exchange can be done naturally through the opening of doors, windows and sometimes through other building openings, or by mechanical equipment. 36 Natural ventilation usually has a low investment and operational costs, while mechanical ventilation systems are more expensive and consume energy. 37 Although there are several guidelines and standards by reputable organizations such as WHO (World Health Organization) and ASHRAE (American Society of Heating, Refrigerating and Air-Condition Engineers), as well as national building codes, these standards are not always met: many studies from different countries have shown ventilation to be inadequate in a large proportion of classrooms.…”

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confidence: 99%

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Building and indoor environmental quality assessment of Nigerian primary schools: A pilot study

et al. 2019

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A total of 15 classrooms went through on‐site assessments/inspections, including measurements of temperature (T), and concentrations of carbon monoxide (CO) and carbon dioxide (CO2). In addition, the level of surface biocontamination/cleaning effectiveness was assessed by measuring adenosine triphosphate (ATP) levels on students' desks. Based on the data, the quality of facilities in the buildings was low. Classroom occupancy exceeded ASHRAE 50 person/100 m2 standard in all cases indicating overcrowding. However, concentrations of CO2 remained below 1000 ppm in most classrooms. On the other hand, indoor T was above the recommended levels for thermal comfort in all classrooms. Maximum indoor CO was 6 ppm. Median ATP concentrations on the desk tops were moderately high in all schools. The use of open incinerators and power generator sets near classrooms, which was suspected to be the main source of CO, should be discouraged. Improved hygiene could be achieved by providing the students access to functioning bathroom facilities and cafeteria, and by effective cleaning of high contact surfaces such as desks. Although ventilation seems adequate based on CO2 concentrations, thermal comfort was not attained especially in the afternoon during extreme sunlight. Therefore, installing passive and/or mechanical cooling systems should be considered in this regard.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Building and indoor environmental quality assessment of Nigerian primary schools: A pilot study

et al. 2019

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“…Recently, heat recovery systems have been considered to be combined with building components such as building walls [48][49][50][51], roofs [52] and wind towers [53][54][55][56]. For example, it has been found that wind towers can provide significantly higher airflow rates than open windows with the same area [57]. However, application of wind towers is generally limited to tropical climates because seasonal temperatures in colder climates are too low to circulate directly into interior spaces.…”

Section: Heat Recovery Combined With Passive Systems For Building Commentioning

confidence: 99%

Review of Heat Recovery Technologies for Building Applications

Riffat

Zhang

2019

Energies

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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.Energies 2019, 12, 1285 2 of 22 to Cuce et al., heat recovery systems are regarded as a greatly promising technology because of their ability to provide significant energy savings for residential buildings [6].The purpose of this review is partly to summarize the current development of heat recovery systems for residential building applications, including their normal types, characteristics, and technical energy-saving possibilities, and partly to discuss the application of heat recovery in energy-efficient systems of buildings, including heat recovery combined with passive systems, mechanical ventilation systems, dehumidification systems, and thermoelectric module (TE) systems of buildings. Finally, a summary and outlook of these systems will be presented. The Definition of Heat Recovery SystemsHeat recovery is often referred to as a device operating between two air sources at different temperatures which transfers energy from one side to the other. In other words, it is based on preheating the incoming air to the interior through recycled waste heat. In general, heat recovery systems could be classified into sensible heat recovery and enthalpy heat recovery. Because of its ability to recover both the sensible heat and the latent heat, enthalpy heat exchangers have a better sustainability effect because of the large proportion of the wet load in the ventilation system and the requirements of the indoor air humidity for modern buildings.A representative heat exchanger system in residential buildings is usually composed of a heat exchanger core, a fresh air inlet and separate contaminated air exhaust outlet, and a fan, as shown in Figure 1...

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“…Prianto and Depecker [10] found that both balconies and openings play an important role in the modification of indoor velocity and thermal comfort condition. Thus, in order to improve the level of thermal comfort, several studies were developed to study the effect of design parameters on indoor airflow, that is, how changing the position and orientation of the building influences thermal comfort; the size of the windows; the interior compartment; the effects of the presence or lack of the balcony; the shape of the roof; the removal of the building from the street; the format of the building; among others [11,12].…”

Section: Introduction mentioning

confidence: 99%

Investigation of the Effects of Glazed Balconies upon Thermal Comfort in Hot Tropical Region

Pagel¹,

Rodrigues²,

Alvarez³

et al. 2019

JCEA

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The balcony is responsible to a series of effects on the environmental behavior of a building, mainly in relation of thermal comfort and air distribution to their indoor spaces. Currently a very common practice in several metropolitan areas is the closing with retractable glass panels in balcony openings. This work analyzed the effects of glazed balconies upon thermal comfort in a hot tropical region. Environmental parameters were carried out in a flat alternating the conditions of retractable glass panels to balconies. Thermal simulations were performed considering closing or not the glass door that divides the balcony room; the building material used on the balcony sill; and the use of curtains or shading devices. The results show the maximum mean hourly temperatures recorded on the balcony during the period when the retractable glass panels were closed, reaching peaks between 31.7 and 39.2 °C, above the comfort range recommended by ASHRAE 55. All situations simulated show the thermal discomfort prevails in the use of the closed glass panels reaching DhTD of 94.55 °C/day. Thus, this practice of using most of the closed retractable glass panels in the balconies presents disadvantages and inefficiencies especially in hot and humid tropical climate regions.

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A review on natural ventilation applications through building façade components and ventilation openings in tropical climates

Cited by 208 publications

References 45 publications

Building and indoor environmental quality assessment of Nigerian primary schools: A pilot study

Building and indoor environmental quality assessment of Nigerian primary schools: A pilot study

Review of Heat Recovery Technologies for Building Applications

Investigation of the Effects of Glazed Balconies upon Thermal Comfort in Hot Tropical Region

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