Optimising Louver Location to Improve Indoor Thermal Comfort based on Natural Ventilation

Ahmed, Noor A.; Wongpanyathaworn, K.

doi:10.1016/j.proeng.2012.10.125

Cited by 20 publications

(11 citation statements)

References 20 publications

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“…Studies suggest that windows design as one of the building-related factors has a significant impact on natural ventilation and consequently IAQ [13,18,22,24,95]. Based on a comprehensive literature review, aspects of window design that affect natural ventilation are classified into six main groups; I) windows' area and location [21,59,83,[96][97][98], II) window/room ratio [59], III) windows' arrangement [21,50,59,96,99], IV) windows' orientation [50,99], V) windows' operation method [83,96,97,[100][101][102][103] and VI) windows' supplements [21,104,105]. The review helps to classify classrooms with high or low potentials for natural ventilation.…”

Section: Building-related Factorsmentioning

confidence: 99%

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Ventilation rates in naturally ventilated primary schools in the UK; Contextual, Occupant and Building-related (COB) factors

Korsavi

Montazami

Mumovic

2020

Building and Environment

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Indoor Air Quality (IAQ) in classrooms is assessed by CO2 levels and Ventilation Rates (VRs). Factors affecting VRs fall into Contextual, Occupant and Building (COB) related factors. This study investigates how VRs are affected by COB factors in 29 naturally-ventilated classrooms in the UK during Non-Heating and Heating seasons. Building-related factors classify classrooms with high or low potentials for natural ventilation, with 45% of classrooms having high potentials. Contextual factors including season, operative temperature (Top), outdoor temperature (Tout), 'Top-Tout' and air density can limit or increase VRs. Occupant-related factors classify occupant's good or poor practice of environmental adaptive behaviours. 'Open area' as a reflection of all COB factors is strongly correlated with ventilation rates. Results show that 12% and 19% of variations in ventilation rates are explained by open areas during non-heating and heating seasons, respectively. Findings highlight that to have VR of 8±1.28 l/s.p during non-heating seasons and VR of 8±1.07 l/s.p during heating seasons, average open areas of 3.8m 2 and 2m 2 are required, respectively. This difference can mostly be explained by temperature difference between inside and outside. Results show COB factors need to be considered holistically to maintain adequate VRs. Classrooms in which all COB factors are met provide average VR of 11 l/s.p and classrooms in which none of COB factors are met provide average VR is 3.1 l/s.p. This study highlights that 40% of classrooms according to EN 13779 and 80% of classrooms according to ASHRAE Standard fail to provide adequate VRs.

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Section: Building-related Factorsmentioning

confidence: 99%

“…Windows that are supplemented with ventilation grills can provide extra ventilation and increase potentials for natural ventilation[21,51,104,105]. Figures10 (school 1) and 11 (school 6) show louvres with fixed horizontal slats that are angled to let air in.…”

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confidence: 99%

Ventilation rates in naturally ventilated primary schools in the UK; Contextual, Occupant and Building-related (COB) factors

Korsavi

Montazami

Mumovic

2020

Building and Environment

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“…It has passed external validation by the BESTEST (Building Energy Simulation Test) standard of the International Energy Agency (IEA), and has also been extensively tested, validated and recognised in the building energy simulation industry and green building rating schemes [23][24][25]. The software provides steady-state analysis of energy consumption and indoor thermal conditions and adopts finite difference approach to solve heat diffusion equations.…”

Section: Modelling Approachmentioning

confidence: 99%

Combined thermal and daylight analysis of a typical public rental housing development to fulfil green building guidance in Hong Kong

Chen

Yang

2015

Energy and Buildings

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“…The IES virtual environment (IES-VE) is used as the simulation tool for studying building operational energy consumption and for assessing the feasibility of natural ventilation (Ahmed and Wongpanyathaworn 2012). Macroflo IES module is used to model and simulate air flow through openings in the building envelope, and ApacheSim IES module is used to model the heat transfer processes occurring in and around the building based on first-principles mathematical modelling of heat transfer (Macroflo, MacroFlo Calculation Methods 2012).…”

Section: Simulation Modelmentioning

confidence: 99%

Natural ventilation in Beirut residential buildings for extended comfort hours

Annan

Ghaddar

Ghali

2014

International Journal of Sustainable Energy

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This paper examines the effectiveness of natural ventilation in Beirut for the purpose of extending comfort periods within living and sleeping zones of the residential buildings. A field survey is conducted to estimate the common window opening and degree profiles. A base case model representing a typical residential apartment located in Beirut was then adopted in integrated environmental solutions (IES) software and calibrated by experimentation through monitoring simulated and measured data indoor. The calibrated IES model was used to evaluate typical wall layering and building local materials and their role in improving indoor comfort with natural ventilation. The simulation results showed that an optimal wall configuration of higher insulation and capacitance, comprised of a 5 cm layer of strawboard sandwiched between a 2 cm × 10 cm wall of masonry Hempcrete units, achieved the highest degree of thermal comfort and enhanced comfort in winter season when compared to the base case.

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Optimising Louver Location to Improve Indoor Thermal Comfort based on Natural Ventilation

Cited by 20 publications

References 20 publications

Ventilation rates in naturally ventilated primary schools in the UK; Contextual, Occupant and Building-related (COB) factors

Ventilation rates in naturally ventilated primary schools in the UK; Contextual, Occupant and Building-related (COB) factors

Combined thermal and daylight analysis of a typical public rental housing development to fulfil green building guidance in Hong Kong

Natural ventilation in Beirut residential buildings for extended comfort hours

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