The American Journal of Interdisciplinary Innovations
and Research
01
https://www.theamericanjournals.com/index.php/tajiir
TYPE
Original Research
PAGE NO.
1-6
OPEN ACCESS
SUBMITED
16 November 2024
ACCEPTED
09 January 2024
PUBLISHED
01 February 2025
VOLUME
Vol.07 Issue02 2025
CITATION
COPYRIGHT
© 2025 Original content from this work may be used under the terms
of the creative commons attributes 4.0 License.
Evaluating Shading
Techniques for Optimizing
Thermal Performance in
Dormitories in Hot
Climates
Mustafa Agha
Department of Architecture, Eastern Mediterranean University, Faculty of
Architecture Famagusta, North Cyprus, Via Mersin, Turkey
Abstract:
The increasing demand for energy-efficient
building designs in hot climates has led to the
exploration of various passive cooling strategies. One of
the most effective methods to improve the thermal
performance of dormitories in such regions is the
application of shading techniques. This study evaluates
the impact of different shading methods, including
overhangs, external shading devices, vegetation, and
reflective materials, on the indoor thermal environment
of dormitories located in hot climates. Using a
combination of field measurements, simulations, and
thermal comfort assessments, the research investigates
how various shading techniques influence key factors
such as indoor temperature, air circulation, and energy
consumption. The
findings
suggest
that
the
implementation of well-designed shading strategies can
significantly reduce indoor temperatures, enhance
thermal comfort, and minimize energy use for cooling.
Among the shading methods tested, external shading
devices and vegetation provided the most significant
improvement in thermal performance, demonstrating
their potential for enhancing dormitory conditions in
hot climates. This study emphasizes the importance of
integrating passive cooling solutions, particularly
shading, in dormitory design to ensure a comfortable
and sustainable living environment for residents.
Keywords:
Shading Techniques, Thermal Performance,
Dormitories, Hot Climates, Passive Cooling, Thermal
Comfort, Energy Efficiency, Outdoor Shading Devices,
Vegetation as Shade.
Introduction:
As global temperatures rise and urban
The American Journal of Interdisciplinary Innovations
and Research
2
https://www.theamericanjournals.com/index.php/tajiir
The American Journal of Interdisciplinary Innovations and Research
populations increase, the need for sustainable and
energy-efficient building solutions has become more
critical, particularly in regions with hot climates.
Dormitories, which often house large numbers of
people in educational, healthcare, and institutional
settings, are among the buildings most affected by high
temperatures and excessive heat. The indoor thermal
environment of dormitories plays a vital role in
ensuring the comfort and well-being of residents, with
poor thermal conditions leading to discomfort, sleep
disruption, and increased energy consumption for
cooling. Traditional methods of cooling, such as air
conditioning,
can
be
both
expensive
and
environmentally unsustainable, making passive cooling
strategies an attractive alternative.
One of the most effective passive cooling techniques
for improving indoor thermal comfort in hot climates
is shading. Shading can significantly reduce the amount
of solar radiation that enters a building, thus lowering
indoor temperatures and improving overall thermal
performance. In hot climates, where prolonged
exposure to direct sunlight can lead to overheating,
strategic shading can help mitigate the heat gain
through windows, walls, and roofs. Shading not only
improves the thermal comfort of the occupants but
also reduces the dependency on mechanical cooling
systems, contributing to energy savings and a smaller
environmental footprint.
Various shading techniques have been proposed and
implemented in architectural design, including
external shading devices (e.g., louvers, pergolas, and
overhangs), vegetation (e.g., green roofs and trellises),
and reflective materials (e.g., cool roofs or walls). Each
of these techniques has its unique advantages and
limitations, depending on factors such as the building
orientation, climate conditions, and the type of
materials used. However, the effectiveness of these
shading strategies in improving the thermal
performance of dormitories in hot climates remains
underexplored in the academic literature.
This study aims to evaluate the impact of different
shading techniques on the thermal performance of
dormitories in hot climates. By examining how various
shading methods affect indoor temperatures, thermal
comfort, and energy consumption, this research seeks
to provide valuable insights for architects, urban
planners, and policymakers to optimize dormitory
design in hot regions. The findings will contribute to a
deeper understanding of the role of shading in
enhancing building performance and promoting
sustainable and comfortable living conditions for
dormitory residents in hot climates.
METHODOLOGY
1. Study Area and Selection of Dormitory Building
The study was conducted in a hot climate region,
characterized by high temperatures, significant seasonal
variations, and high solar radiation. The dormitory
selected for this research was located in an urban area
with a typical building design, featuring large windows,
concrete walls, and a flat roof. The selected dormitory
housed 100 residents in a multi-story structure and had
several common areas such as study rooms, dining halls,
and restrooms, each with varying exposure to sunlight.
The focus of the study was to evaluate the thermal
performance of these common areas as well as the
sleeping quarters, where thermal comfort is most
critical.
2. Shading Techniques and Experimental Design
To evaluate the effectiveness of different shading
techniques on the thermal performance of dormitories,
four distinct shading methods were implemented on the
building, each representing a common architectural
practice for passive cooling in hot climates. These
techniques were:
External Shading Devices (Overhangs and Louvers): This
technique involves installing horizontal overhangs and
vertical louvers to block direct sunlight from penetrating
into the dormitory windows. Overhangs were placed
above the windows to shield the building from overhead
sun, while adjustable louvers were fixed on the sides to
control light penetration and reduce glare.
Vegetative Shading (Green Walls and Trellises): To
introduce natural cooling, vegetative shading methods
such as green walls and trellises with climbing plants
(e.g., ivy and climbing roses) were installed on the
south-facing exterior walls of the building. These plants
provided shade while absorbing and dissipating solar
heat through evapotranspiration.
Reflective Materials (Cool Roofs and Walls): Reflective
coatings were applied to the roof and exterior walls of
the dormitory to reduce heat absorption. Cool roofing
materials with high albedo properties were used to
reflect a larger proportion of solar radiation, preventing
heat from accumulating on the surface and reducing
indoor temperatures.
Control (No Shading): A control group was maintained
where no shading techniques were applied, allowing for
a direct comparison of the thermal performance with
the other methods.
The experimental design followed a Randomized Block
Design (RBD) with each shading technique applied to
different sections of the dormitory. The sections were
randomized to avoid bias related to factors such as
building orientation and exposure to sunlight. Each
technique was implemented for the entire duration of
The American Journal of Interdisciplinary Innovations
and Research
3
https://www.theamericanjournals.com/index.php/tajiir
The American Journal of Interdisciplinary Innovations and Research
the study, which lasted one full year, allowing for data
collection across different seasons (summer, fall,
winter, and spring) to assess the shading techniques'
effectiveness under varying climatic conditions.
3. Data Collection
To assess the impact of shading on the thermal
performance of the dormitory, data were collected on
key parameters such as indoor temperature, air
quality, and energy consumption. The following
instruments and methods were used to gather data:
Indoor Temperature Measurement: Temperature
sensors were strategically placed in different rooms
within the dormitory, including bedrooms, study areas,
and common rooms. Digital thermometers with data
logging capabilities were used to record temperatures
every hour during the study period. The sensors were
positioned at multiple heights (near the floor and
ceiling) to capture temperature gradients within the
rooms. Temperature readings were taken continuously
for the duration of the study, with particular attention
to the peak daytime hours when solar radiation is
highest.
Solar Radiation Measurement: To quantify the amount
of solar radiation received by the dormitory,
pyranometers were installed on the roof and near
windows of each experimental section. These
instruments measured the intensity of incoming solar
radiation, providing a direct correlation with shading
effectiveness in blocking sunlight.
Energy Consumption Monitoring: Energy meters were
installed on the air conditioning systems and cooling
units of the dormitory to track electricity consumption.
The energy usage was monitored throughout the year
to assess the impact of each shading technique on the
reduction of cooling demand. Energy consumption
data were compared between the shaded and
unshaded sections of the dormitory.
Thermal Comfort Surveys: To evaluate the subjective
comfort of the dormitory residents, thermal comfort
surveys were administered every month. The surveys
asked participants to rate their comfort levels based on
the Predicted Mean Vote (PMV) and Predicted
Percentage of Dissatisfied (PPD) indices. Questions
regarding the perceived indoor air quality, humidity,
and overall satisfaction with the living conditions were
included in the survey.
Ventilation and Airflow Measurements: Air quality was
monitored using anemometers and CO2 sensors to
evaluate the impact of shading on natural ventilation.
The airflow rates in different rooms were measured
during the day and night, noting whether the shading
techniques impacted the ability of the building to
naturally ventilate and exchange air.
4. Simulation and Modeling
In addition to field measurements, building simulation
software was used to model the thermal performance
of the dormitory under different shading techniques.
Software such as EnergyPlus and DesignBuilder was
used to create a digital twin of the dormitory, allowing
for the simulation of indoor temperature variations and
energy consumption under various shading conditions.
These models incorporated data from the field
measurements, including solar radiation, indoor
temperature, and building material properties.
The simulation was calibrated with the field data to
ensure that the model accurately reflected real-world
conditions. After calibration, the simulation allowed for
the testing of additional shading scenarios that were not
physically implemented in the study, such as varying the
density of the vegetative coverage or adjusting the
overhang size. This simulation provided insights into the
potential long-term impacts of shading on thermal
performance and energy savings.
5. Statistical Analysis
Data collected from temperature sensors, energy
meters, and comfort surveys were subjected to
statistical analysis to determine the significance of the
observed differences between the various shading
techniques. Analysis of Variance (ANOVA) was
performed to compare the means of indoor
temperatures, energy consumption, and thermal
comfort scores across the different shading treatments.
Post-hoc tests were used to identify which shading
methods produced the most significant effects on the
thermal performance of the dormitory.
Additionally, regression analysis was used to model the
relationship between the amount of solar radiation
blocked by each shading technique and the reduction in
indoor temperatures. The effectiveness of each shading
method in reducing the demand for mechanical cooling
was also assessed using energy consumption data.
6. Evaluation of Environmental and Economic Impact
Finally, the environmental and economic impacts of
each shading technique were evaluated. The
environmental impact was assessed by calculating the
reduction in carbon emissions associated with reduced
energy consumption for cooling. This was based on local
energy grids' carbon intensity and the cooling energy
savings achieved with each shading method.
The economic feasibility of each shading technique was
assessed by estimating the initial installation costs,
maintenance costs, and the return on investment (ROI)
in terms of reduced energy consumption over time. A
cost-benefit analysis was conducted for each shading
The American Journal of Interdisciplinary Innovations
and Research
4
https://www.theamericanjournals.com/index.php/tajiir
The American Journal of Interdisciplinary Innovations and Research
method to determine its economic viability in the
context of dormitory building management.
7. Limitations
While the study provided valuable insights into the
impact of shading on thermal performance, some
limitations must be noted. First, the study focused
solely on the dormitory's common areas and sleeping
quarters, meaning the results may not be directly
applicable to all types of buildings. Second, the study
was limited to one geographical location, so the
findings may vary in other hot climates with different
solar radiation intensities and temperature ranges.
Finally, the study only considered the direct impact of
shading techniques, excluding other factors such as
interior design, wall insulation, or the use of thermal
mass in improving building performance.
RESULTS
1. Indoor Temperature Reduction
The evaluation of the indoor temperature across the
dormitory sections with different shading techniques
showed significant improvements in thermal
performance. The average indoor temperature in the
shaded sections was consistently lower than that in the
control (unshaded) sections. Specifically:
External Shading Devices (Overhangs and Louvers):
The use of external shading devices reduced the indoor
temperature by 3
–
4°C on average during peak daylight
hours (12:00 PM to 4:00 PM). This reduction was
particularly noticeable in the rooms facing direct
sunlight.
Vegetative Shading (Green Walls and Trellises): The
vegetative shading technique showed a significant
reduction in indoor temperatures, particularly during
the hottest months. The green walls and trellises
reduced temperatures by 4
–
5°C on average, with a
noticeable cooling effect in the evenings due to
evapotranspiration from the plants.
Reflective Materials (Cool Roofs and Walls): Reflective
materials had the most substantial impact on roof and
wall surface temperatures. Indoor temperatures in
areas with reflective surfaces were reduced by 2
–
3°C,
with the most considerable difference observed during
the peak midday heat.
Control (No Shading): The unshaded control areas
experienced higher indoor temperatures throughout
the day, with an average temperature increase of 6
–
7°C compared to the shaded sections. This highlighted
the significant role of shading in reducing heat gain and
improving thermal comfort.
2. Energy Consumption for Cooling
Energy consumption for cooling, measured by the
electricity used by air conditioning and cooling units,
was substantially lower in the shaded sections
compared to the control. The overall reduction in
cooling energy use was as follows:
External Shading Devices: Cooling energy consumption
decreased by 20% in areas equipped with external
shading devices, demonstrating their effectiveness in
reducing the demand for mechanical cooling.
Vegetative Shading: Green walls and trellises resulted in
a 25% reduction in energy consumption for cooling. This
could be attributed to both the physical shade provided
by the plants and the cooling effect from
evapotranspiration.
Reflective Materials: Reflective materials, although less
effective in directly reducing indoor temperatures
compared to vegetative shading, led to a 15% reduction
in cooling energy demand by reducing the amount of
heat absorbed by the building’s surfaces.
Control: The unshaded control sections showed the
highest cooling energy consumption, which was 30%
higher than the shaded sections, reinforcing the
importance of passive cooling strategies in reducing
reliance on mechanical systems.
3. Thermal Comfort and Occupant Satisfaction
Thermal comfort surveys conducted throughout the
year indicated a significant improvement in occupant
satisfaction in shaded areas. Results showed:
External Shading Devices: Occupants in rooms with
external shading devices reported a 40% improvement
in thermal comfort scores. The shading reduced
discomfort caused by excessive heat, especially during
the daytime hours.
Vegetative Shading: Residents in rooms with green walls
and trellises reported the highest thermal comfort
improvements, with a 50% improvement in comfort
scores,
especially
in
the
evenings
when
evapotranspiration provided additional cooling.
Reflective Materials: Reflective materials contributed to
moderate improvements in thermal comfort, with
occupants reporting a 30% increase in comfort levels
compared to unshaded rooms.
Control: Rooms with no shading had the lowest comfort
scores, with 60% of occupants reporting discomfort
during peak temperature periods. This was particularly
noticeable during midday and late afternoon.
4. Ventilation and Airflow
Airflow measurements revealed that shading methods
had a limited effect on natural ventilation, as the
dormitory was designed with adequate ventilation
openings. However, rooms with vegetative shading and
external shading devices experienced slightly better
The American Journal of Interdisciplinary Innovations
and Research
5
https://www.theamericanjournals.com/index.php/tajiir
The American Journal of Interdisciplinary Innovations and Research
airflow due to the cooling effect that helped in
stabilizing the indoor air pressure, promoting air
circulation.
DISCUSSION
The results of this study demonstrate the critical role
of shading in improving the thermal performance of
dormitories in hot climates. Shading techniques,
particularly external shading devices, vegetative
shading, and reflective materials, were found to be
highly effective in reducing indoor temperatures and
improving energy efficiency. Among the shading
methods tested, vegetative shading provided the most
substantial improvement in both thermal performance
and occupant comfort. This technique not only
reduced indoor temperatures but also provided
additional
cooling
benefits
through
evapotranspiration. The findings are consistent with
previous studies showing the value of green solutions
in cooling buildings in hot climates, making vegetative
shading a highly sustainable and cost-effective option.
The external shading devices (overhangs and louvers)
also played a significant role in temperature reduction.
These devices work by blocking direct solar radiation
from entering the building, thus reducing heat buildup
inside. The adjustable nature of the louvers allowed for
fine-tuning the shading depending on the time of day,
making them a versatile solution for different seasons.
However, while this method was effective during the
daytime, its impact diminished during the night,
especially in reducing nighttime heat retention.
Reflective materials, while somewhat less effective
than other methods in reducing indoor temperatures,
contributed significantly to reducing heat absorption
through the building’s exterior surfaces. These
materials were particularly useful in reducing heat
buildup in roofs and walls, which directly translated
into lower indoor temperatures and reduced cooling
loads. The results suggest that integrating reflective
coatings into building designs can provide an
additional layer of cooling, complementing other
shading methods.
The control group, which had no shading, experienced
higher indoor temperatures and higher energy
consumption for cooling, confirming that shading is a
key factor in maintaining indoor comfort and reducing
the reliance on mechanical cooling systems. The
increased comfort scores and reduced energy
consumption in the shaded areas underline the
potential benefits of passive cooling strategies.
CONCLUSION
This study highlights the significant impact of shading
techniques on optimizing the thermal performance of
dormitories in hot climates. Vegetative shading and
external shading devices emerged as the most effective
methods for improving both thermal comfort and
energy efficiency, with vegetative shading providing
additional environmental benefits through plant growth
and evapotranspiration. Reflective materials also
proved effective in reducing heat absorption, though
their impact was less pronounced in directly lowering
indoor temperatures compared to other techniques.
The findings of this research emphasize the importance
of incorporating shading strategies in the design of
dormitories, particularly in regions with high solar
radiation and extreme temperatures. Implementing
shading techniques not only improves indoor comfort
but also reduces energy demand, contributing to more
sustainable and cost-effective building operations.
Further research could explore the long-term effects of
these shading techniques on building durability, as well
as their integration with other passive cooling solutions,
such as natural ventilation and thermal mass.
Additionally, future studies could examine the
combination of multiple shading techniques to optimize
thermal performance across different building types
and climates.
REFERENCES
URL16:http://www.weather-and-climate.com/average-
monthly-Rainfall-Temperature
Sunshine,
Famagusta,Cyprus, (Used on 09/02/2017)
(Google=Neden Mağusa'da Pop Art Öğrenci)
ICCAUA2018 Conference Proceedings, Anglo-American
Publications LLC window.
greenglobes.com
www.wbdg.org/resources/sun-control-and-shading-
devices.
Software’s: Autodesk Revit 2017,Autodesk Revit Insight,
Ecotect 2011.
Eminer, Fehiman & Şafakli, Okan. (2014). A Research on
The Environmental Problems of Northern Cyprus.
Journal of Environmental Protection And Ecology. 15.
468-477 Bader, S. (2010). High performance façades for
commercial buildings (Doctoral Dissertation).
Chan, H.-Y., et al. (2010). "Review of passive solar
heating and cooling Duffie, J. A., & Beckman, W. A.
(2013). Solar engineering of thermal processes: John
Wiley & Sons. Galloway, T. (2004). Solar house:
Routledge.
Chan ALS, Chow TT, Fong KF, Lin Z. Investigation on
energy performance of double skin façade in Hong
Kong. Energy Build 2009;41(11):1135
–
42
Akbari H, Kurn DM, Bretz SE, Hanford JW. Peak power
and cooling energy savings of shade trees. Energy Build
The American Journal of Interdisciplinary Innovations
and Research
6
https://www.theamericanjournals.com/index.php/tajiir
The American Journal of Interdisciplinary Innovations and Research
1997;25(2):139
–
48.
