Floriberta Binarti - Academia.edu (original) (raw)

Papers by Floriberta Binarti

International Review for Spatial Planning and Sustainable Development

Several studies have investigated the elements determining the thermal comfort of open spaces thr... more Several studies have investigated the elements determining the thermal comfort of open spaces through the use of physical and physiological approaches. The findings showed that psychological adaptation plays an equally important role as physical and physiological adaptation in outdoor thermal comfort. Therefore, this study was conducted to explore the elements of open spaces which perceptually influence thermal comfort in the Indonesian context through the use of a mixed qualitative-quantitative approach. The qualitative was used in the first phase through the development of a web-based questionnaire with open-ended questions and content analysis which was used to produce 24 variables. These were further applied in the second phase to develop the second questionnaire which contains closed-ended questions after which the data obtained were analyzed using factor analysis to determine the perceived dimensions of open spaces' elements. The results showed 10 perceived dimensions of open spaces' elements influencing outdoor thermal comfort. Moreover, the multiple regression analysis indicated only "shading", "visual and auditory aspects", and "natural elements and friends' company" had a significant effect but the last two dimensions cannot be tested using physical and physiological approaches. These findings are expected to enrich place-making guidelines required to assist urban designers and administrators in developing more comfortable and livable open spaces for residents. 1.

Dimensi: Journal of Architecture and Built Environment, 2007

Speech intelligibility, which is a function of reverberation time (RT60), is a primary criterion ... more Speech intelligibility, which is a function of reverberation time (RT60), is a primary criterion to design acoustic of an auditorium. Optimum RT60 (0,5-1,0 s) in a diffuse auditorium is determined by the absorption and the room geometry. This paper describes Ecotect as a computational simulation program that is supportive in deciding the position and area of absorption material in the auditorium. Calculations based on statistical reverberation and existing acoustic particles methods are sufficient for the approach of room acoustic design. Site measurement result was used to examine validity of the program. Redesign of acoustic of the auditorium, then, was done based on the result of sound path analysis by identifying the position and the area of absorption material. Final test results by statistical reverberation and existing acoustic particles methods point out that the application of sound path analysis is quite successful to improve RT60, sound distribution, and the cost. Abstrac...

Shading device, window to wall ratio, window height, and glazing are important factors in determi... more Shading device, window to wall ratio, window height, and glazing are important factors in determining building energy consumption in the tropics. This study employed the four factors in designing energy-efficient window for classroom to reduce the energy consumption for supplemented lighting and mechanical ventilation. The main parameter is classroom’s cooling load or heat transfer through the building skins (< 10 watt/m2) incorporated with secondary parameters, i.e. indoor illuminance level (200-400 lux) or daylight factor (2-3%), and horizontal illuminance distribution. Relationship among window to wall ratio, window to floor ratio, height of clerestory, clerestory to wall height ratio, and classroom’s orientation, width and length are examined using Ecotect simulation program to stablish a concept for energy-efficient classroom’s window. Window with projected clerestory is the most energy efficient. It transfers minimum solar radiation and creates the most even horizontal illu...

Rapid development of information technology offers computer as an interesting teaching tool. This... more Rapid development of information technology offers computer as an interesting teaching tool. This study of investigated the effectiveness of Computer Aided Drawing (CAD) as a teaching media of “Struktur dan Konstruksi Bangunan Gedung 1 ” in School of Architecture at UAJY. Case based pre-test and post-test are the research instruments. They are used to measure the improvement of student’s competence in applying structural principles with the structural design of a one story building in respect to the using of CAD as a teaching media. Both thesis were conducted four times, each before and after presentation of the subject matter using CAD.T test shows significant improvement of student’s learning achievement due to the use of CAD as a teaching media. Some facilities in CAD could help students to understand the position and the relation of structural elements by presenting them in 2 dimensions and 3 dimensions simultaneously in district colors, which are not available in conventional m...

Installation of solar shading device in warm-humid climates for preventing overheating tends to g... more Installation of solar shading device in warm-humid climates for preventing overheating tends to generate gloomy interior. Hence, adopting the anidolic principles on an exterior solar shading, namely anidolic solar shading (ASS), aimed to create bright, pleasant interior and to improve the thermal performance of the anidolic daylighting system (ADS). This study developed a simulation-based parametric method to examine the critical elements of the anidolic collector and to investigate the magnitude of the improvement impacts on the energy performances of the ASS relative to the performances of unshaded clerestory, clerestory with eave, and ADS. By adding cavities and self-shading, the ASS could achieve relatively high thermal and daylighting performance estimated by simulation study, which comparatively agree quite well with the short-term monitoring results.

Shading device, window to wall ratio, window height, and glazing are important factors in determi... more Shading device, window to wall ratio, window height, and glazing are important factors in determining building energy consumption in the tropics. This study employed the four factors in designing energy-efficient window for classroom to reduce the energy consumption for supplemented lighting and mechanical ventilation. The method was based on Ecotect simulations under some parameters, i.e. heat gains through the building fabrics, illuminance level, and daylight factor. This study concluded that projected clerestory is the most energy-efficient window design. It should be applied on classroom with considering the Window to Wall Ratio, the clerestory height to room height ratio, the window to floor area ratio, and using low visible transmittance of the view window glazing to achieve even horizontal daylight distribution.

Sistem peneduh merupakan cara konvensional yang sangat efektif di dalam mengatasi perambatan radi... more Sistem peneduh merupakan cara konvensional yang sangat efektif di dalam mengatasi perambatan radiasi panas matahari yang tinggi di daerah tropis lembab. Kelemahan dari sistem peneduh yang berkembang saat ini adalah terciptanya ruangan yang cenderung suram terutama pada area yang jauh dari bukaan cahaya. Untuk mengatasi permasalahan pencahayaan, studi ini berupaya memanfaatkan prinsip-prinsip edge-ray pada sistem non-imaging optics pada rancangan sistem peneduh. Beberapa model dikembangkan untuk memperoleh model sistem peneduh yang optimal dari aspek pencahayaan alami dan aspek termal (solar heat gain). Kinerja pencahayaan alami diukur dari tingkat terang rata-rata, distribusi tingkat terang secara horisontal dan efek silau yang dihasilkan. Sedangkan, aspek termal diukur dari radiasi panas yang terkumpul dan rata-rata suhu udara di dalam ruangan. Model-model ini dikaji melalui studi simulasi dengan menggunakan program Radiance (plugged in Ecotect) dan EnergyPlus yang divalidasi denga...

Bukaan cahaya memiliki peran penting dalam menentukan besarnya konsumsi energi pada bangunan, ter... more Bukaan cahaya memiliki peran penting dalam menentukan besarnya konsumsi energi pada bangunan, terutama di daerah tropis dengan luas bukaan cahaya yang dominan. Bukaan cahaya tidak hanya berkaitan dengan kinerja pencahayaan alami, melainkan juga kinerja termal bangunan. Pengaruh bukaan cahaya pada kinerja termal dapat dikatakan memiliki peranan utama karena kinerja termal menentukan beban penyejukan bangunan yang memiliki kontribusi terbesar di dalam konsumsi energi bangunan. Saat ini penggunaan program simulasi sebagai piranti untuk memperkirakan kinerja termal bangunan pada tahap desain sudah bersifat wajib. Akurasi simulasi merupakan kunci utama yang menentukan apakah hasil simulasi tersebut dapat diandalkan. Computational Fluid Dynamics (CFD) merupakan salah satu program simulasi termal yang rinci dan dikenal akurat. Program CFD menyediakan beberapa model radiasi yang didasarkan pada asumsi-asumsi yang berbeda. CFD-ACE+ menyediakan 4 model radiasi. Pemakaian model yang tepat akan...

Environmental and Climate Technologies, 2016

Light shelf was developed to create uniform indoor illuminance. However, in hot climates the unsh... more Light shelf was developed to create uniform indoor illuminance. However, in hot climates the unshaded clerestory above the shelf transmits high solar heat gain. In dense urban context, these advantages and disadvantages might vary regarding the context and position of the fenestration. This study employed an integrated energy simulation software to investigate the effectiveness of light shelf application in a tropical urban context in terms of building energy consumption.

DIMENSI (Jurnal Teknik Arsitektur), 2005

In low cost housing of warm humid regions where natural ventilation is usually employed, the pres... more In low cost housing of warm humid regions where natural ventilation is usually employed, the presence of large openings will also cause unnecessary glare and heat gain of solar radiation This paper reports a preliminary study to handle glare issue without impairing natural ventilation. The use of climbing vegetation planted on a frame with fully adjusted foliage dense as shading devices is investigated. The frame is placed at the most possible position of the low cost housing and two variables, i.e. foliage porosity and leaf surface reflectance is studied using two computational simulation methods. Radiance is employed to calculate glare index after the vegetative shading and Brevent is used to assess ventilation flow rates occurred indoors toward indoors thermal comfort of the modelled housing. The study indicates that using climbing vegetation is possible for both reducing glare and supplying the required ventilation flow rates at the same time.

Environmental and Climate Technologies, 2020

This study presents a combination technique of thermal infrared images captured by infrared camer... more This study presents a combination technique of thermal infrared images captured by infrared camera and satellite thermal images retrieved from Landsat-8 OLI TIRS to identify the contribution of vertical and horizontal surface materials in two hot-humid street canyons with similar sky view factor and street orientation. The infrared camera captures surface temperature images of vertical and inclined surfaces of the street canyons. The images at horizontal scale are derived based on six land cover indices – i.e., Land Surface Temperature (LST), surface albedo, thermal emissivity, Normalized Different Vegetation Index (NDVI), Normalized Different Built Area Index (NDBI), Normalized Different Water Index (NDWI) – using an image processing technique conducted in ArcGIS. This study used two micro weather stations to measure microclimate conditions depicting the Canopy Layer Heat Island (CLHI) of the canyons at the same time. Despite the capability of the combined technique to identify the...

This study developed minimum requirements for energy-efficient material of campus building in Yog... more This study developed minimum requirements for energy-efficient material of campus building in Yogyakarta based on overall thermal transfer value (OTTV) and daylighting criteria. Measures of energy efficiency are 150-200 lux with minimal 80% for the daylighting distribution and 45 W/m2 for the maximum OTTV. Certain window to wall ratio (WWR) was defined based on the simulation results of the daylighting level and the distribution with considering the feasibility factor. Minimum requirements forthe thermal transmittance (U), the shading coefficient (SC), the solar absorption (a) and the visible light transmittance (VT) were generated from the OTTV calculation of the classroom, which meets the OTTV and the daylighting criteria. The material’sembodied energy was considered in setting several combinations of SC, VT, a and U for each window orientation and typical WWR. The results show that in warm humid areas lower SC and light color surface are more effective in raising energy-efficient...

Green glass block merupakan upaya pemanfaatan limbah kaca dengan metode laminasi yang ramah lingk... more Green glass block merupakan upaya pemanfaatan limbah kaca dengan metode laminasi yang ramah lingkungan. Sandwich dan rongga diaplikasikan untuk menciptakan bahan berperforma energi tinggi. Metode analitis, simulasi dan uji laboratorium dipilih sebagai pendekatan desain. Secara analitis bahan baru ini memiliki transmitansi panas < 3 W/m2.K. Hasil uji laboratorium menunjukkan transmisi cahaya tampaknya (VT) sebesar 0,43-0,55 dengan transmisi radiasi matahari (SHGC) sebesar 0,10-0,25. Dengan kombinasi nilai VT dan SHGC tersebut green glass block termasuk efisien energi.

urban climate, 2021

The heat stress experienced by tourists in the visitor area is a typical phenomenon of large-scal... more The heat stress experienced by tourists in the visitor area is a typical phenomenon of large-scale tropical archaeological sites. Climate change potentially worsens it and threatens the temple sustainability. The three objectives of this study are therefore to describe the microclimate characteristics determining the thermal comfort levels (indexed in the Physiologically Equivalent Temperature (PET)) in the visitor area, define the adaptation level as a parameter for the mitigation strategies, and formulate the mitigation strategies for the extreme thermal condition in designing a climate-resilient archaeological park. This study utilized satellite image processing, seven-month field meteorological measurements, and surveys with a questionnaire to obtain the local and microclimate data, as well as visitors' thermal sensation and preferences. Subsequently, the data obtained were subjected to statistical analysis, and the results depict the uniqueness of local and microclimate cha...

Two types of plants were used in a study to see employee perceptions and facts of plants in reduc... more Two types of plants were used in a study to see employee perceptions and facts of plants in reducing indoor noise level, i.e. Sansevieria trifasciata and Scindapsus sp. Each type were planted in containers and placed inside cubicles of two offices. The noise levels were measured using sound level meters and taken in 3 periods, i.e. without plants, with Sansevieria, and with Scindapsus in place. Questionnaire surveys among employees and leaves absorption coefficient (α) measurement were also conducted. Both leaves showed significant α at high sound frequencies, i.e. 0.6. But, the meters showed very insignificant noise difference before and after plantings, i.e. only 3 dB with no regard of plant types. Fluctuation of 3 dB is hardly noticed by human hearing instruments. Whilst, the surveys showed contradictory results, 60% I1st office) and 22% (2 st office) of employees agreed that noise level was lowered after plantings. These showed that indoor plants might create more pleasant envir...

SCAN sendiri merupakan singkatan dari Sustainable Culture, Architecture, and Nature. Substansi ru... more SCAN sendiri merupakan singkatan dari Sustainable Culture, Architecture, and Nature. Substansi rumusan ini mencakup empat kata kunci yaitu keberlanjutan kebudayaan, arsitektur, dan alam. SCAN mengandung konsep penting bahwa arsitektur merupakan hasil dialektika dan keterpaduan antara kebudayaan dan alam, maka kelestarian arsitektur adalah keberlanjutan kebudayaan dan alam sekaligus. Tema yang diusung SCAN tahun ini adalah ‘Education … Putting Eco-DNA in Our Kids’. Tema ini ditujukan untuk mengumpulkan pemikiran, strategi, pedoman, manajemen, metoda perencanaan dan perancangan tata lingkungan dan arsitektur pada berbagai skala yang kreatif, memberi arah serta mampu mengembangkan generasi sadar diri secara ekologis menuju terciptanya harmoni lingkungan alam dan buatan, sejalan dengan harapan atau jaminan baru bagi keberlanjutan kebudayaan, kelestarian alam dan arsitektur yang sadar dan ramah lingkungan. Sesuai dengan tema, fokus utama di dalam tema ini adalah anak-anak, dan seminar ka...

IOP Conference Series: Earth and Environmental Science, 2020

ENVI-met is one of the most widely-used outdoor microclimatic models. Since previous studies foun... more ENVI-met is one of the most widely-used outdoor microclimatic models. Since previous studies found that ENVI-met tends to overestimate the MRT, this study attempted to maximize the ENVI-met capability of modelling the MRT in order to obtain accurate simulation results. This study developed three variations of the 3D-model and employed some features to improve the large MRT discrepancy between the field measurement and simulation that resulted from the preliminary model. The field MRT measurements were conducted using a globe-thermometer method on two hot days, i.e., September 21 and October 17. After comparing the results of field measurements and simulations, this study came into a conclusion that the current free version software is capable of performing MRT predictions with a low discrepancy (5%) by using “Solar Adjustment Factor” and “Cloud Conditions” features (19.7% improvement), and maximizing the spatial resolution. The spatial resolution in z-axis decreases the discrepancy ...

Energy crisis and global warming need effective programs in energy conservation. A simple and pra... more Energy crisis and global warming need effective programs in energy conservation. A simple and practical standard for energy conservation in building, which enables society and material producers to use, is an effective prescription and regulation. This paper presents preliminary study of the development of minimum requirements for energy-efficient material of education building in Yogyakarta based on overall thermal transfer value (OTTV) and daylighting criteria. Standard daylighting level for classroom with an even distribution and 45 W/m2 for the maximum OTTV are measures of energy efficiency. Simulations of the daylighting level and the distribution with considering the feasibility factor were conducted to define optimum window to wall ratio (WWR). Minimum requirements for the thermal transmittance (U), the shading coefficient (SC), the solar absorption (a) and the visible light transmittance (VT) were generated from the OTTV calculation of classroom model, which meets the daylig...

Sustainable Cities and Society, 2021

Geographia Technica, 2020

This paper aims to study a microclimate model for predicting the role of façade materials to the ... more This paper aims to study a microclimate model for predicting the role of façade materials to the Canopy Layer Heat Island. ENVI-met was selected to model the microclimate of four street canyons in Yogyakarta, which vary in façade materials, street orientation, and land cover. Three to four-day field measurements in each canyon were intended to obtain microclimate data at pedestrian level, wind speed and orientation at the boundary layer for simulation input and validation. The validation study confirms the accuracy of ENVI-met simulations in predicting air temperature and relative humidity when the initial wind speed at the boundary layer is > 1.5 m/s. These input data affected on the simulation results. However, the "comparison" feature offers a facility to analyze the modification in the air temperature and mean radiant temperature in the street canyon due to higher thermal transmittance and higher surface albedo façade materials. The results show that street orientation, big trees along the street and sky view factor significantly affect the pattern of air temperature modified by the increasing thermal transmittance and albedo of the façades.

International Review for Spatial Planning and Sustainable Development

Several studies have investigated the elements determining the thermal comfort of open spaces thr... more Several studies have investigated the elements determining the thermal comfort of open spaces through the use of physical and physiological approaches. The findings showed that psychological adaptation plays an equally important role as physical and physiological adaptation in outdoor thermal comfort. Therefore, this study was conducted to explore the elements of open spaces which perceptually influence thermal comfort in the Indonesian context through the use of a mixed qualitative-quantitative approach. The qualitative was used in the first phase through the development of a web-based questionnaire with open-ended questions and content analysis which was used to produce 24 variables. These were further applied in the second phase to develop the second questionnaire which contains closed-ended questions after which the data obtained were analyzed using factor analysis to determine the perceived dimensions of open spaces' elements. The results showed 10 perceived dimensions of open spaces' elements influencing outdoor thermal comfort. Moreover, the multiple regression analysis indicated only "shading", "visual and auditory aspects", and "natural elements and friends' company" had a significant effect but the last two dimensions cannot be tested using physical and physiological approaches. These findings are expected to enrich place-making guidelines required to assist urban designers and administrators in developing more comfortable and livable open spaces for residents. 1.

Dimensi: Journal of Architecture and Built Environment, 2007

Speech intelligibility, which is a function of reverberation time (RT60), is a primary criterion ... more Speech intelligibility, which is a function of reverberation time (RT60), is a primary criterion to design acoustic of an auditorium. Optimum RT60 (0,5-1,0 s) in a diffuse auditorium is determined by the absorption and the room geometry. This paper describes Ecotect as a computational simulation program that is supportive in deciding the position and area of absorption material in the auditorium. Calculations based on statistical reverberation and existing acoustic particles methods are sufficient for the approach of room acoustic design. Site measurement result was used to examine validity of the program. Redesign of acoustic of the auditorium, then, was done based on the result of sound path analysis by identifying the position and the area of absorption material. Final test results by statistical reverberation and existing acoustic particles methods point out that the application of sound path analysis is quite successful to improve RT60, sound distribution, and the cost. Abstrac...

Shading device, window to wall ratio, window height, and glazing are important factors in determi... more Shading device, window to wall ratio, window height, and glazing are important factors in determining building energy consumption in the tropics. This study employed the four factors in designing energy-efficient window for classroom to reduce the energy consumption for supplemented lighting and mechanical ventilation. The main parameter is classroom’s cooling load or heat transfer through the building skins (< 10 watt/m2) incorporated with secondary parameters, i.e. indoor illuminance level (200-400 lux) or daylight factor (2-3%), and horizontal illuminance distribution. Relationship among window to wall ratio, window to floor ratio, height of clerestory, clerestory to wall height ratio, and classroom’s orientation, width and length are examined using Ecotect simulation program to stablish a concept for energy-efficient classroom’s window. Window with projected clerestory is the most energy efficient. It transfers minimum solar radiation and creates the most even horizontal illu...

Rapid development of information technology offers computer as an interesting teaching tool. This... more Rapid development of information technology offers computer as an interesting teaching tool. This study of investigated the effectiveness of Computer Aided Drawing (CAD) as a teaching media of “Struktur dan Konstruksi Bangunan Gedung 1 ” in School of Architecture at UAJY. Case based pre-test and post-test are the research instruments. They are used to measure the improvement of student’s competence in applying structural principles with the structural design of a one story building in respect to the using of CAD as a teaching media. Both thesis were conducted four times, each before and after presentation of the subject matter using CAD.T test shows significant improvement of student’s learning achievement due to the use of CAD as a teaching media. Some facilities in CAD could help students to understand the position and the relation of structural elements by presenting them in 2 dimensions and 3 dimensions simultaneously in district colors, which are not available in conventional m...

Installation of solar shading device in warm-humid climates for preventing overheating tends to g... more Installation of solar shading device in warm-humid climates for preventing overheating tends to generate gloomy interior. Hence, adopting the anidolic principles on an exterior solar shading, namely anidolic solar shading (ASS), aimed to create bright, pleasant interior and to improve the thermal performance of the anidolic daylighting system (ADS). This study developed a simulation-based parametric method to examine the critical elements of the anidolic collector and to investigate the magnitude of the improvement impacts on the energy performances of the ASS relative to the performances of unshaded clerestory, clerestory with eave, and ADS. By adding cavities and self-shading, the ASS could achieve relatively high thermal and daylighting performance estimated by simulation study, which comparatively agree quite well with the short-term monitoring results.

Shading device, window to wall ratio, window height, and glazing are important factors in determi... more Shading device, window to wall ratio, window height, and glazing are important factors in determining building energy consumption in the tropics. This study employed the four factors in designing energy-efficient window for classroom to reduce the energy consumption for supplemented lighting and mechanical ventilation. The method was based on Ecotect simulations under some parameters, i.e. heat gains through the building fabrics, illuminance level, and daylight factor. This study concluded that projected clerestory is the most energy-efficient window design. It should be applied on classroom with considering the Window to Wall Ratio, the clerestory height to room height ratio, the window to floor area ratio, and using low visible transmittance of the view window glazing to achieve even horizontal daylight distribution.

Sistem peneduh merupakan cara konvensional yang sangat efektif di dalam mengatasi perambatan radi... more Sistem peneduh merupakan cara konvensional yang sangat efektif di dalam mengatasi perambatan radiasi panas matahari yang tinggi di daerah tropis lembab. Kelemahan dari sistem peneduh yang berkembang saat ini adalah terciptanya ruangan yang cenderung suram terutama pada area yang jauh dari bukaan cahaya. Untuk mengatasi permasalahan pencahayaan, studi ini berupaya memanfaatkan prinsip-prinsip edge-ray pada sistem non-imaging optics pada rancangan sistem peneduh. Beberapa model dikembangkan untuk memperoleh model sistem peneduh yang optimal dari aspek pencahayaan alami dan aspek termal (solar heat gain). Kinerja pencahayaan alami diukur dari tingkat terang rata-rata, distribusi tingkat terang secara horisontal dan efek silau yang dihasilkan. Sedangkan, aspek termal diukur dari radiasi panas yang terkumpul dan rata-rata suhu udara di dalam ruangan. Model-model ini dikaji melalui studi simulasi dengan menggunakan program Radiance (plugged in Ecotect) dan EnergyPlus yang divalidasi denga...

Bukaan cahaya memiliki peran penting dalam menentukan besarnya konsumsi energi pada bangunan, ter... more Bukaan cahaya memiliki peran penting dalam menentukan besarnya konsumsi energi pada bangunan, terutama di daerah tropis dengan luas bukaan cahaya yang dominan. Bukaan cahaya tidak hanya berkaitan dengan kinerja pencahayaan alami, melainkan juga kinerja termal bangunan. Pengaruh bukaan cahaya pada kinerja termal dapat dikatakan memiliki peranan utama karena kinerja termal menentukan beban penyejukan bangunan yang memiliki kontribusi terbesar di dalam konsumsi energi bangunan. Saat ini penggunaan program simulasi sebagai piranti untuk memperkirakan kinerja termal bangunan pada tahap desain sudah bersifat wajib. Akurasi simulasi merupakan kunci utama yang menentukan apakah hasil simulasi tersebut dapat diandalkan. Computational Fluid Dynamics (CFD) merupakan salah satu program simulasi termal yang rinci dan dikenal akurat. Program CFD menyediakan beberapa model radiasi yang didasarkan pada asumsi-asumsi yang berbeda. CFD-ACE+ menyediakan 4 model radiasi. Pemakaian model yang tepat akan...

Environmental and Climate Technologies, 2016

Light shelf was developed to create uniform indoor illuminance. However, in hot climates the unsh... more Light shelf was developed to create uniform indoor illuminance. However, in hot climates the unshaded clerestory above the shelf transmits high solar heat gain. In dense urban context, these advantages and disadvantages might vary regarding the context and position of the fenestration. This study employed an integrated energy simulation software to investigate the effectiveness of light shelf application in a tropical urban context in terms of building energy consumption.

DIMENSI (Jurnal Teknik Arsitektur), 2005

In low cost housing of warm humid regions where natural ventilation is usually employed, the pres... more In low cost housing of warm humid regions where natural ventilation is usually employed, the presence of large openings will also cause unnecessary glare and heat gain of solar radiation This paper reports a preliminary study to handle glare issue without impairing natural ventilation. The use of climbing vegetation planted on a frame with fully adjusted foliage dense as shading devices is investigated. The frame is placed at the most possible position of the low cost housing and two variables, i.e. foliage porosity and leaf surface reflectance is studied using two computational simulation methods. Radiance is employed to calculate glare index after the vegetative shading and Brevent is used to assess ventilation flow rates occurred indoors toward indoors thermal comfort of the modelled housing. The study indicates that using climbing vegetation is possible for both reducing glare and supplying the required ventilation flow rates at the same time.

Environmental and Climate Technologies, 2020

This study presents a combination technique of thermal infrared images captured by infrared camer... more This study presents a combination technique of thermal infrared images captured by infrared camera and satellite thermal images retrieved from Landsat-8 OLI TIRS to identify the contribution of vertical and horizontal surface materials in two hot-humid street canyons with similar sky view factor and street orientation. The infrared camera captures surface temperature images of vertical and inclined surfaces of the street canyons. The images at horizontal scale are derived based on six land cover indices – i.e., Land Surface Temperature (LST), surface albedo, thermal emissivity, Normalized Different Vegetation Index (NDVI), Normalized Different Built Area Index (NDBI), Normalized Different Water Index (NDWI) – using an image processing technique conducted in ArcGIS. This study used two micro weather stations to measure microclimate conditions depicting the Canopy Layer Heat Island (CLHI) of the canyons at the same time. Despite the capability of the combined technique to identify the...

This study developed minimum requirements for energy-efficient material of campus building in Yog... more This study developed minimum requirements for energy-efficient material of campus building in Yogyakarta based on overall thermal transfer value (OTTV) and daylighting criteria. Measures of energy efficiency are 150-200 lux with minimal 80% for the daylighting distribution and 45 W/m2 for the maximum OTTV. Certain window to wall ratio (WWR) was defined based on the simulation results of the daylighting level and the distribution with considering the feasibility factor. Minimum requirements forthe thermal transmittance (U), the shading coefficient (SC), the solar absorption (a) and the visible light transmittance (VT) were generated from the OTTV calculation of the classroom, which meets the OTTV and the daylighting criteria. The material’sembodied energy was considered in setting several combinations of SC, VT, a and U for each window orientation and typical WWR. The results show that in warm humid areas lower SC and light color surface are more effective in raising energy-efficient...

Green glass block merupakan upaya pemanfaatan limbah kaca dengan metode laminasi yang ramah lingk... more Green glass block merupakan upaya pemanfaatan limbah kaca dengan metode laminasi yang ramah lingkungan. Sandwich dan rongga diaplikasikan untuk menciptakan bahan berperforma energi tinggi. Metode analitis, simulasi dan uji laboratorium dipilih sebagai pendekatan desain. Secara analitis bahan baru ini memiliki transmitansi panas < 3 W/m2.K. Hasil uji laboratorium menunjukkan transmisi cahaya tampaknya (VT) sebesar 0,43-0,55 dengan transmisi radiasi matahari (SHGC) sebesar 0,10-0,25. Dengan kombinasi nilai VT dan SHGC tersebut green glass block termasuk efisien energi.

urban climate, 2021

The heat stress experienced by tourists in the visitor area is a typical phenomenon of large-scal... more The heat stress experienced by tourists in the visitor area is a typical phenomenon of large-scale tropical archaeological sites. Climate change potentially worsens it and threatens the temple sustainability. The three objectives of this study are therefore to describe the microclimate characteristics determining the thermal comfort levels (indexed in the Physiologically Equivalent Temperature (PET)) in the visitor area, define the adaptation level as a parameter for the mitigation strategies, and formulate the mitigation strategies for the extreme thermal condition in designing a climate-resilient archaeological park. This study utilized satellite image processing, seven-month field meteorological measurements, and surveys with a questionnaire to obtain the local and microclimate data, as well as visitors' thermal sensation and preferences. Subsequently, the data obtained were subjected to statistical analysis, and the results depict the uniqueness of local and microclimate cha...

Two types of plants were used in a study to see employee perceptions and facts of plants in reduc... more Two types of plants were used in a study to see employee perceptions and facts of plants in reducing indoor noise level, i.e. Sansevieria trifasciata and Scindapsus sp. Each type were planted in containers and placed inside cubicles of two offices. The noise levels were measured using sound level meters and taken in 3 periods, i.e. without plants, with Sansevieria, and with Scindapsus in place. Questionnaire surveys among employees and leaves absorption coefficient (α) measurement were also conducted. Both leaves showed significant α at high sound frequencies, i.e. 0.6. But, the meters showed very insignificant noise difference before and after plantings, i.e. only 3 dB with no regard of plant types. Fluctuation of 3 dB is hardly noticed by human hearing instruments. Whilst, the surveys showed contradictory results, 60% I1st office) and 22% (2 st office) of employees agreed that noise level was lowered after plantings. These showed that indoor plants might create more pleasant envir...

SCAN sendiri merupakan singkatan dari Sustainable Culture, Architecture, and Nature. Substansi ru... more SCAN sendiri merupakan singkatan dari Sustainable Culture, Architecture, and Nature. Substansi rumusan ini mencakup empat kata kunci yaitu keberlanjutan kebudayaan, arsitektur, dan alam. SCAN mengandung konsep penting bahwa arsitektur merupakan hasil dialektika dan keterpaduan antara kebudayaan dan alam, maka kelestarian arsitektur adalah keberlanjutan kebudayaan dan alam sekaligus. Tema yang diusung SCAN tahun ini adalah ‘Education … Putting Eco-DNA in Our Kids’. Tema ini ditujukan untuk mengumpulkan pemikiran, strategi, pedoman, manajemen, metoda perencanaan dan perancangan tata lingkungan dan arsitektur pada berbagai skala yang kreatif, memberi arah serta mampu mengembangkan generasi sadar diri secara ekologis menuju terciptanya harmoni lingkungan alam dan buatan, sejalan dengan harapan atau jaminan baru bagi keberlanjutan kebudayaan, kelestarian alam dan arsitektur yang sadar dan ramah lingkungan. Sesuai dengan tema, fokus utama di dalam tema ini adalah anak-anak, dan seminar ka...

IOP Conference Series: Earth and Environmental Science, 2020

ENVI-met is one of the most widely-used outdoor microclimatic models. Since previous studies foun... more ENVI-met is one of the most widely-used outdoor microclimatic models. Since previous studies found that ENVI-met tends to overestimate the MRT, this study attempted to maximize the ENVI-met capability of modelling the MRT in order to obtain accurate simulation results. This study developed three variations of the 3D-model and employed some features to improve the large MRT discrepancy between the field measurement and simulation that resulted from the preliminary model. The field MRT measurements were conducted using a globe-thermometer method on two hot days, i.e., September 21 and October 17. After comparing the results of field measurements and simulations, this study came into a conclusion that the current free version software is capable of performing MRT predictions with a low discrepancy (5%) by using “Solar Adjustment Factor” and “Cloud Conditions” features (19.7% improvement), and maximizing the spatial resolution. The spatial resolution in z-axis decreases the discrepancy ...

Energy crisis and global warming need effective programs in energy conservation. A simple and pra... more Energy crisis and global warming need effective programs in energy conservation. A simple and practical standard for energy conservation in building, which enables society and material producers to use, is an effective prescription and regulation. This paper presents preliminary study of the development of minimum requirements for energy-efficient material of education building in Yogyakarta based on overall thermal transfer value (OTTV) and daylighting criteria. Standard daylighting level for classroom with an even distribution and 45 W/m2 for the maximum OTTV are measures of energy efficiency. Simulations of the daylighting level and the distribution with considering the feasibility factor were conducted to define optimum window to wall ratio (WWR). Minimum requirements for the thermal transmittance (U), the shading coefficient (SC), the solar absorption (a) and the visible light transmittance (VT) were generated from the OTTV calculation of classroom model, which meets the daylig...

Sustainable Cities and Society, 2021

Geographia Technica, 2020

This paper aims to study a microclimate model for predicting the role of façade materials to the ... more This paper aims to study a microclimate model for predicting the role of façade materials to the Canopy Layer Heat Island. ENVI-met was selected to model the microclimate of four street canyons in Yogyakarta, which vary in façade materials, street orientation, and land cover. Three to four-day field measurements in each canyon were intended to obtain microclimate data at pedestrian level, wind speed and orientation at the boundary layer for simulation input and validation. The validation study confirms the accuracy of ENVI-met simulations in predicting air temperature and relative humidity when the initial wind speed at the boundary layer is > 1.5 m/s. These input data affected on the simulation results. However, the "comparison" feature offers a facility to analyze the modification in the air temperature and mean radiant temperature in the street canyon due to higher thermal transmittance and higher surface albedo façade materials. The results show that street orientation, big trees along the street and sky view factor significantly affect the pattern of air temperature modified by the increasing thermal transmittance and albedo of the façades.