Mochamad Donny Koerniawan
Verified email at gmail.com
Department of Architecture, School of Architecture Planning, and Policy Development
Institute of Technology, Bandung
RESEARCH INTERESTS
urban thermal comfort, thermal comfort, walking comfort, building performance, sustainable city, liveable city
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Didit Novianto, Mochammad Donny Koerniawan, Munawir Munawir, and Dian Sekartaji
Sustainable Cities and Society, ISSN: 22106707, Published: August 2022
Elsevier BV
Atthaillah, R. A. Mangkuto, M. Koerniawan and F. Soelami
Journal of Applied Science and Engineering (Taiwan), ISSN: 27089967, eISSN: 27089975, Pages: 129-139, Published: 19 July 2022
ABSTRACT
This study investigated twenty-two (22) state elementary schools, regarding daylight annual illuminance in the classrooms, using climate-based daylight modelling (CBDM) metrics. This is due to the missing information on the annual daylight performance inside the classroom in Indonesia. Over 250 classrooms were assessed using Rhinoceros and Grasshopper computational platforms. Furthermore, Daysim simulation engine was employed through the advantage of Ladybug tools to connect and automate the simulation workflow parametrically. Since there were no prior studies using CBDM metrics for daylight assessment of classrooms in the Indonesian context, the illuminance range from 250 to 750 lux was taken as the target for the annual useful daylight illuminance (UDI), as suggested in the Indonesian daylighting standard. Result shows 35 classrooms under the good daylight performance, 171 classrooms in sufficient category and 50 others under unsatisfactory of annual illuminance. The most sensitive contributors are both corridor and back shading depth with Spearman correlation of -0.70 and -0.76 respectively. The strong sensitive variables both has p-values lower than 0.05 which indicates statistically significant for the model.
Atthaillah, Rizki A. Mangkuto, Mochamad Donny Koerniawan, and Brian Yuliarto
Buildings, eISSN: 20755309, Published: June 2022
MDPI AG
External shading devices are an important design feature in tropical buildings, particularly for climate mitigation. However, the interaction between the depth and elevation of the shading devices and their impact on indoor daylight performance is not fully understood, especially for the case of tropical buildings with bilateral openings. This study therefore aims to evaluate the design possibilities of external shading devices with various depth and elevation in terms of daylight performance for the case of tropical school classrooms with bilateral openings in an Indonesian city. A computational simulation method using Radiance is utilized to perform annual daylight metrics calculations. Geometry, material, and simulation settings are prepared using the Ladybug tool under Grasshopper for four building orientations, namely 0°, 45°, 90°, and 135°. Sensitivity and uncertainty analyses are conducted for all design combinations. The results show that the interaction between a shading device’s depth and elevation is unique, depending on the building orientation and the availability of direct sunlight. In general, shading elevation is more influential, compared to shading depth, on the observed daylight metrics and the combined objective functions at all orientations.
E Habibah, E A Suyono, M D Koerniawan, L T Suwanti, U J Siregar, and A Budiman
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 963, Published: 19 January 2022
IOP Publishing
Abstract The study of microalgae is widely developed on a laboratory scale. The large-scale applications of microalgae such as large photo-bioreactors or commercial ponds are not well established due to some obstacles. The high cost of artificial lighting in microalgae cultivation is one of the obstacles. Markedly, the natural sunlight intensity is high every month for a whole year in Indonesia. This natural sunlight may serve as a low-cost lighting source for microalgae cultivation in a tropical country such as Indonesia. However, the basic knowledge of whether the natural sunlight in Indonesia is sufficient or not for microalgae cultivation is poorly understood. This study was performed to investigate whether sunlight in Indonesia, particularly in Yogyakarta, is sufficient or not for microalgae cultivation in the absence of artificial lighting. The sun lighting period data from January 2019 to June 2020 were collected from BMKG (Badan Meteorologi Klimatologi dan Geofisika) website. The sun lighting period data were converted into solar radiation data. The Liliefors test was performed to evaluate the distribution of the solar radiation data. To confirm whether the sun lighting in Yogyakarta is sufficient for microalgae cultivation or not, the parametric statistical test namely single sample T-test was used in this study. The Liliefors test showed that solar radiation in Yogyakarta (January 2019 to June 2020) was normally distributed. The calculated Liliefors value (0.14) was less than Liliefors table value (2.00). The T-test results revealed that the solar radiation in Yogyakarta is equal to or higher than the sufficient solar radiation (reference) for microalgae cultivation (795 kWh/m2). The calculated t value (0.65) was higher than the t table value (-1.74). When taken together, our findings suggest that natural sunlight in Yogyakarta is sufficient as a lighting source for microalgae cultivation.
T M A Soelaiman, A U Paramitasari, M D Koerniawan, N Victoryka, A Santoso, H W Poerbo, and W Kartidjo
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 1058, Published: 2022
IOP Publishing
Abstract Since the establishment of the Low-Carbon Model Town (LCMT) Task Force in 2010, many projects have been conducted by Asia-Pacific Economic Cooperation (APEC), and one of them was held in Banda Aceh, Indonesia. In 2017, a Feasibility Study as a dissemination program of LCMT APEC was carried out in Banda Aceh, one of the volunteer towns proposed by the Ministry of Energy and Mineral Resource because of the readiness of the city government to develop the city. Banda Aceh government has committed to be an energy conscious and greenest city in Indonesia by 2034, with several policies and action plans made, although the low carbon concept was not explicitly explained and stated. However, there are several findings from the feasibility study conducted that indicated a difference between the readiness of Banda Aceh city government and its community, especially the residential buildings users. This study is conducted to find out whether the government’s efforts and vision to implement the low carbon concept are in line with the awareness or knowledge possessed by local residents. Three steps were carried out as the methodology of this study, including literature study from APEC Low-Carbon Town Indicator (LCT-I), secondary data analysis from programs, policies and action plans prepared by city government, and survey through questionnaire to the local residents in four locations. The result then examines the readiness of the people in Banda Aceh and later on determines which LCT principles are suitable for Banda Aceh city, particularly for residential areas. Based on the study, the supply is one of the concerns, as the untapped and renewable energy is still underutilized. While the government plan and social dissemination has been held through several projects/regulations, the practice of Banda Aceh’s people at home in handling the energy usage has not reflected the energy saving principles.
Rahayu Dian Eka Putri, Yano Surya Pradana, Mochamad Donny Koerniawan, Lucia Tri Suwanti, Ulfah Juniarti Siregar, Arief Budiman, and Eko Agus Suyono
Asia-Pacific Journal of Molecular Biology and Biotechnology, ISSN: 01287451, Pages: 15-23, Published: 2022
Malaysian Society for Molecular Biology and Biotechnology
Chlorella vulgaris and Dunaliella sp. are prominent microalgae that are generally used for natural pigment stocks. These species have been established as producer of valuable bio compounds such as chlorophyll, carotenoids, and astaxanthin. For this research, C. vulgaris and Dunaliella sp. were cultivated in mixed culture under nitrogen stress treatments. Total four treatments at distinct nitrate concentrations of 0.012, 0.025, 0.5 NaNO3 g/L, respectively including nitrogen starvation was incorporated in this study. Nitrogen limitation and nitrogen starvation are widely used techniques to manipulate metabolic pathways into secondary pigments biosynthesis in microalgae cells. In addition, spectrophotometric measurement was conducted to investigate every single pigment content in all four treatments of distinct nitrogen concentrations for 14 days. The highest chlorophyll-a (23.65 mg/L), chlorophyll-b (10.02 mg/L), and total carotenoids (7.61 mg/L) were obtained from mixed culture with a concentration of 0.025 g/L NaNO3 in the last period cultivation. Conversely, the highest content of astaxanthin (0.6 mg/L) in mixed culture of C. vulgaris and Dunaliella sp. in the last period cultivation was achieved from starvation of nitrogen as well. The microalgae demonstrated robust growth in the presence of diverse bacterial community in the culture. It is well known that microalgae are associated with the microbiota on its phycosphere biofilm. Yet, it is unclear which specific bacteria taxa have a role in supporting or inhibiting microalgae growth.
Atthaillah, Rizki A. Mangkuto, and Mochamad Donny Koerniawan
Lecture Notes in Civil Engineering, ISSN: 23662557, eISSN: 23662565, Volume: 223, Pages: 135-144, Published: 2022
Springer Singapore
Rizki A. Mangkuto, Mochamad Donny Koerniawan, Sri Rahma Apriliyanthi, Irma Handayani Lubis, Atthaillah, Jan L. M. Hensen, and Beta Paramita
Buildings, eISSN: 20755309, Published: January 2022
MDPI AG
Optimisation of shading devices in buildings is a broadly investigated topic; however, most studies only focus on a single façade orientation, since the observed buildings are typically located in high latitude regions. However, in tropical regions, optimisation of all façade orientations is required due to the relatively high solar radiation and long sunshine duration. While adaptive shading devices are a promising solution, they are not without disadvantages, and as such a combination of adaptive shading devices and a fixed shading device shall be considered. This research therefore aims to design the optimum internal shading devices on four façade orientations of a high-rise office building in a tropical city, considering fixed and adaptive shading design options, and to determine the impact on annual daylight performance using computational modelling and simulation. The simulation is carried out under: (1) fixed design option, focusing on the numbers and width of slats; and (2) adaptive design option, focusing on the slat angle on various conditions. It is found that both sDA300/50% and ASE1000,250 are only influenced by the orientation. Under the fixed design option, the sDA300/50% and ASE1000,250 targets can be achieved only on the north and south façades, and accordingly the adaptive design option shall be implemented on the east and west façades. Overall, this study contributes to knowledge regarding the optimisation of shading devices in high-rise buildings in the tropics, considering the daylight admission from the four cardinal orientations.
Floriberta Binarti, Mochamad Donny Koerniawan, Sugeng Triyadi, and Andreas Matzarakis
Sustainable Cities and Society, ISSN: 22106707, Published: January 2022
Elsevier BV
Rizki A. Mangkuto, Atthaillah, Mochamad Donny Koerniawan, and Brian Yuliarto
Buildings, eISSN: 20755309, Published: December 2021
MDPI AG
In daylighting design, variation of building façade thickness (f) will result in variation of the daylight opening areas, which in turn will modify the values of daylight metrics within the space. However, studies dedicated to investigating the impact of varying f on indoor daylight metrics are relatively scarce. This study, therefore, aims to assess the theoretical impact of various façade thicknesses on various daylight metrics and lighting energy demands in a reference office space. Analytical calculations are performed using an outdoor diffuse illuminance profile of a tropical city. The building façade thickness values are varied within 0–0.50 m, at window-to-wall ratios (WWR) of 25%, 50%, and 75%. Based on sensitivity analysis, it is found that variation of f yields different impacts on the observed metrics, with sDA300/50% being the least influenced. Among all metrics in the central calculation point, DA300, UDI-a, and UDI-a′ yield relatively small coefficients of variation, and thus, have the lowest uncertainty with respect to f. Among all metrics for the entire room, sDA300/50% and sUDI-a50% have the lowest uncertainty, with interquartile ranges of no more than 0.4%. Overall, the contribution of this study is providing insight into the impact of façade thickness on various daylight metrics in indoor spaces, particularly in the worst-case scenario under the standard CIE overcast sky.
Dadang Hartabela, Bart Julien Dewancker, and Mochamad Donny Koerniawan
Sustainability (Switzerland), eISSN: 20711050, Published: December-2 2021
MDPI AG
Outdoor thermal comfort is an important indicator to create a quality and livable environment. This study examines a relationship between micro-meteorological and personal variables of outdoor thermal comfort conditions in an urban park. The data collection of outdoor thermal comfort is carried out using two methods in combination: micro-meteorological measurement and questionnaire survey. This finding shows that most of the respondents were comfortable with the thermal, wind, and humidity condition. The acceptability and satisfaction level of thermal comfort were positive. The most significant micro-meteorological variable for the physiologically equivalent temperature (PET) value is mean radiant temperature (Tmrt). As the Tmrt value is influenced by how much shading is produced from the presence of vegetation or buildings around the measurement location, this finding shows that the shadow was very important to the thermal comfort conditions in the Green Park Kitakyushu. The most influential micro-meteorological variable for the three different personal variables (TSV, WFSV, and HSV) is air temperature. The strongest relationship among the four variables is between TSV and PET. The findings will be the basis for the city authorities in preparing regional development plans, especially those related to the planning of city parks or tourist attractions.
D Novianto, A S Hidayat, F Y Hazrati, A M Rahmavani, A R Fadhila, A M Jaya, M D Koerniawan, and Munawir
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 881, Published: 12 November 2021
IOP Publishing
Abstract This study is trying to investigate the occupant’s lifestyle change during the ‘Work from Home’ (WFH) in face of the COVID-19 pandemic in Indonesia. It is predicted that energy use, especially electricity use in the housing sector is increasing due to longer in-home period during activities restriction. In addition, the household’s way of using their thermal appliances such as air conditioner (AC), electric fan, and the ventilation ways by windows are also predicted to increase in hot and humid climate cities. For that reason, the survey was conducted during the mid of April to the end of April 2021 through the web-based questionnaires which are targeting the individual and families. First, the data collected are summarized includes the building characteristics, family structures, home appliances, lifestyle, and the ownership of thermal air conditioning system appliances. Secondly, to grasp the change in electricity use, we summarized the results about the lifestyle change related to home energy use during the period of WFH. Finally, from the results of this survey, people’s concerns and awareness regarding the health and quality of the surrounding environment are increasing. This could be good momentum for authority to establish a modern society with awareness and a good quality environment. A strategy for energy distribution and increasing the use of renewable energy in household buildings is needed to meet demand and build a sustainable society.
Lily Tambunan, M Donny Koerniawan, Nova Asriana, and N Fathina Izmi
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 738, Published: 29 April 2021
IOP Publishing
Abstract This study investigates the resilience of kampung settlement based on connectivity for developing mitigation strategy in urban context. Kampung Taman Sari, Bandung, is chosen as a case study of this paper. Kampung, the main urban settlement type of every city in Indonesia, is an informal settlement, with minimum urban services and facilities, therefore inhabitants who living there are more vulnerable in the response of disaster evacuation. This paper studies a deep understanding of the morphological configuration of Kampung based on connectivity and networks which define and show the degree of capability to prepare, respond, recover, and survive in the face of disaster. Depth map simulation and Space Syntax is used to analyze the degree of connectivity and network. The result shows the key relation of connectivity and accessibility of movement evacuation, not only for human movement but also rescue team, including the transportation.
Munawir, Lia Nurbanillah Fujianti, M D Koerniawan, and Bart Dewancker
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 738, Published: 29 April 2021
IOP Publishing
Abstract The existence of a thematic green open space in Bandung is one of the pioneers in the urban landscape of Indonesian cities. In addition, the thematic park in Bandung is also one of the efforts to realize the concept of a green city besides its function as a medium of channelling citizens’ aspirations. Furthermore, the thematic park concept is to make a difference between one park and other parks and to define its own uniqueness. As public spaces, such as parks, can also be functioned as a place to express an opinion, visitor’s opinion plays an important role. Recently, the online reviews data particularly has been considered as an important factor to influence consumers’ decision and are valued as assets based on valued information. In this research, we used the online reviews method from google maps to collect all information from reviewers about the thematic parks and to analyse the attractiveness of the thematic parks in Bandung City. Our approach is to evaluate visitor’s perceptions by identifying sentences from opinions or reviews regarding the fulfilment of thematic park functions based on its user or visitor, facilities, community activities, and atmosphere of the park. Social network data towards developing urban park attractiveness. The result shows the dominant factor attractiveness of thematic parks is the user or community factor. Moreover, user-oriented thematic park concept generates a special attraction for visitors to visit thematic parks.
Floriberta Binarti, Sugeng Triyadi, M. Donny Koerniawan, Pranowo Pranowo, and Andreas Matzarakis
Urban Climate, ISSN: 22120955, Published: March 2021
Elsevier BV
Rizki A. Mangkuto and Mochamad Donny Koerniawan
LEUKOS - Journal of Illuminating Engineering Society of North America, ISSN: 15502724, eISSN: 15502716, Published: 2021
Informa UK Limited
Floriberta Binarti, Hanson E. Kusuma, M. Donny Koerniawan, and Sugeng Triyadi
International Review for Spatial Planning and Sustainable Development, eISSN: 21873666, Pages: 41-57, Published: 2021
International Community of Spatial Planning and Sustainable Development
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.
Rizki A. Mangkuto, , Mochamad Donny Koerniawan, Beta Paramita, , and
Journal of Daylighting, ISSN: 23838701, Pages: 167-185, Published: December 2020
SolarLits
Exposing oneself to outdoor daylight in the morning can be healthy and harmful at the same time, due to the risk of ultraviolet exposure. The presence of surrounding buildings in the urban context may also influence the risk. This study aims to identify the impact of courtyard and street canyon surroundings of various size and heights on the peak time and values of global illuminances and ultraviolet index (UVI), for the case of a tropical city. The impact of the surroundings is estimated by performing annual daylighting simulation with Daysim, considering various receiving plane orientations, followed with sensitivity analysis. The results suggest that in the courtyard scenes, on 21 March, 21 June, and 22 December, the maximum horizontal UVI are respectively 9 at 12.00 hrs, 9 at 10.00 hrs, and 5 at 11.00 hrs, while the corresponding, maximum vertical UVI are 6, facing east at 09.00 hrs; 8, northeast at 10.00 hrs; and 3, southeast at 08.00 hrs. In the street canyon scenes, the 5m wide street is more sensitive to height variation, compared to the 10-m wide. The maximum horizontal UVI on the three days are 10, 9, and 5; while the corresponding, maximum vertical UVI are 6, east; 9, northeast; and 4, southeast; all with the same peak time as in the courtyard scenes. Sensitivity analysis results from the three days are found to be more reliable than those from the entire year. The study thus has the main contribution in providing the methodology in estimating UVI under various outdoor scenarios with surrounding buildings, particularly in the tropical region. © 2020 The Author(s). Published by solarlits.com. This is an open access article under the CC BY license (https://creativecommons.org/licenses/by/4.0/).
Marcel Schweiker, Amar Abdul-Zahra, Maíra André, Farah Al-Atrash, Hanan Al-Khatri, Rea Risky Alprianti, Hayder Alsaad, Rucha Amin, Eleni Ampatzi, Alpha Yacob Arsano, Montazami Azadeh, Elie Azar, Bannazadeh Bahareh, Amina Batagarawa, Susanne Becker, Carolina Buonocore, Bin Cao, Joon-Ho Choi, Chungyoon Chun, Hein Daanen, Siti Aisyah Damiati, Lyrian Daniel, Renata De Vecchi, Shivraj Dhaka, Samuel Domínguez-Amarillo, Edyta Dudkiewicz, Lakshmi Prabha Edappilly, Jesica Fernández-Agüera, Mireille Folkerts, Arjan Frijns, Gabriel Gaona, Vishal Garg, Stephanie Gauthier, Shahla Ghaffari Jabbari, Djamila Harimi, Runa T. Hellwig, Gesche M. Huebner, Quan Jin, Mina Jowkar, Renate Kania, Jungsoo Kim, Nelson King, Boris Kingma, M. Donny Koerniawan, Jakub Kolarik, Shailendra Kumar, Alison Kwok, Roberto Lamberts, Marta Laska, M. C. Jeffrey Lee, Yoonhee Lee, Vanessa Lindermayr, Mohammadbagher Mahaki, Udochukwu Marcel-Okafor, Laura Marín-Restrepo, Anna Marquardsen, Francesco Martellotta, Jyotirmay Mathur, Gráinne McGill, Isabel Mino-Rodriguez, Di Mou, Bassam Moujalled, Mia Nakajima, Edward Ng, Marcellinus Okafor, Mark Olweny, Wanlu Ouyang, Ana Ligia Papst de Abreu, Alexis Pérez-Fargallo, Indrika Rajapaksha, Greici Ramos, Saif Rashid, Christoph F. Reinhart, Ma. Isabel Rivera, Mazyar Salmanzadeh, Karin Schakib-Ekbatan, Stefano Schiavon, Salman Shooshtarian, Masanori Shukuya, Veronica Soebarto, Suhendri, Mohammad Tahsildoost, Federico Tartarini, Despoina Teli, Priyam Tewari, Samar Thapa, Maureen Trebilcock, Jörg Trojan, Ruqayyatu B. Tukur, Conrad Voelker, Yeung Yam, Liu Yang, Gabriela Zapata-Lancaster, Yongchao Zhai, Yingxin Zhu, and Zahra Sadat Zomorodian
Scientific Data, eISSN: 20524463, Published: 1 December 2020
Springer Science and Business Media LLC
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Arbye S., Retno Fitri Arianti, Yano Surya Pradana, Eko Agus Suyono, Mochamad Donny Koerniawan, Lucia Tri Suwanti, Ulfah Juniarti Siregar, and Arief Budiman
AIP Conference Proceedings, ISSN: 0094243X, eISSN: 15517616, Volume: 2296, Published: 16 November 2020
AIP Publishing
Retno Fitri Arianti, Arbye S., Yano Surya Pradana, Eko Agus Suyono, Mochamad Donny Koerniawan, Lucia Tri Suwanti, Ulfah Juniarti Siregar, and Arief Budiman
AIP Conference Proceedings, ISSN: 0094243X, eISSN: 15517616, Volume: 2296, Published: 16 November 2020
AIP Publishing
Nova Asriana and Mochamad Donny Koerniawan
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 532, Published: 14 August 2020
IOP Publishing
Abstract Nowadays, Indonesia confronts urbanization, which raises many problems in the urban area, one of them is carbon emissions. Many researches have been done to address the issue of carbon emissions, TOD (Transit-Oriented Development) is one of them. This paper focuses entirely on how to develop the Transit-Oriented Development (TOD) design through low carbon city concepts in Indonesia. The concept of low-carbon cities is potentially implemented for high-energy efficiency in the areas of transport and housing will be able to reduce carbon footprint by decreasing trip frequencies, greater public transportation use for residents, increasing of walking level and higher accessibility. The city has to stimulate compact development with the high mobility movement of space in which space, building and infrastructure will be incorporated into a complex to authorise for living varied, commercial and social space to merge in environmentally sustainability. The development of a design strategy for the stakeholders is needed to develop and promote design ideas to optimise the spatial structure of cities. This paper aims to improve low carbon city model by adding integration between the urban spatial structure and land use to promote urban mixed, mobility, walkability, urban connectivity, and accessibility. These strategies will be used in a new development city in Palembang. Palembang is selected as representative of the rising megapolitan city in Indonesia where it still has capabilities for new spatial development planning to be improved the quality of life, well-planned new connectivity and sustainable cities. In this issue the TOD approach will be harmonized with the low carbon city concept.
F Binarti, MD Koerniawan, S Triyadi, and SS Utami
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 541, Published: 27 July 2020
IOP Publishing
Abstract 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 by 2.5%.
M Jahja, A Gunawan, A N F Syamsul, Y I Arifin, and M D Koerniawan
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 520, Published: 19 June 2020
IOP Publishing
Abstract To optimize Gorontalo’s residential building design to a sequential search technique is being used to minimize their life-cycle energy cost while improving their energy efficiency. Certain design features are included like air-conditioned, house orientation, window material, wall exterior finish, roof insulation, lighting fixtures, cooling system efficiencies, and photovoltaic while also considering the neighbor displacement. The outcomes of the sequential search methodology are contrasted with those achieved through a more time-consuming approach to brute-force optimization. Alternatively, for selected locations in Gorontalo, the best design features for residential building is determined. By using specific measures resulted from the optimization technique can cost-effectively reduce the annual energy saving by 59%, while adding the photovoltaic as a measure, we can increase the annual energy use saving percentage up to 117% compared to the reference design in the residential building in Gorontalo.
IOP Conference Series: Earth and Environmental Science, ISSN: 17551307, eISSN: 17551315, Volume: 520, Published: 19 June 2020
IOP Publishing
Dear professors and distinguished delegates, On behalf of the ICRESBE 2019 Organizing Committee, I would like to welcome you to International Conference on Renewable Energy and Sustainable Built Environment (ICRESBE) 2019. The aim of the conference is to bring together researchers and practitioners working on Renewable Energy Technologies and Sustainable Built Environment. We hope that the conference will create as many opportunities as possible for further collaboration and technical interchanges between individuals. Participants will make presentations and discussions over 6 topics, i.e. Passive Design in Architecture; Net Zero-Energy Building; Building Performance Simulation; Renewable Energy; Biorefinery; and Sustainable Matrix, which provide more opportunities for experts and scholars to communicate with each other. Your suggestions are warmly welcomed for the further development of the conferences in the future. Wish you have a fruitful and memorable experience. We look forward to meeting you again next time. Yours sincerely, M.Donny Koerniawan ICRESBE 2019 Coordinator List Sponsors, Scientific Committee, Photos are available in this pdf.