Selected Papers from 2015 TAU Conference on Mitigating the Built Environments for Climate Change

A special issue of Buildings (ISSN 2075-5309). This special issue belongs to the section "Building Energy, Physics, Environment, and Systems".

Deadline for manuscript submissions: closed (20 June 2015) | Viewed by 43709

Special Issue Editor


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Guest Editor
School of Architecture, Tanri Abeng University, Jalan Swadarma Raya No 58, Jakarta 12250, Indonesia
Interests: thermal comfort; low energy building; tropical architecture; green architecture; sustainable built environment; low carbon town; human behavior and carbon emissions

Special Issue Information

Dear Colleagues,

This Special Issue of Buildings is a publication of selected papers presented at the 2015 TAU International Conference on “Mitigating and adapting built environments for climate change in the tropics”, held at the Tanri Abeng University (TAU), Jakarta, Indonesia, on 30 and 31 March 2015. The topic emerges as a matter of concern towards the present development of developing countries, such as Indonesia, to improve the nation’s wellbeing. In developing countries, improving the nation’s wellbeing would need a massive development of their built environments. The massive development has triggered the use of fossil fuel and other of Earth’s resources, emitting huge amounts of carbon dioxide and creating global warming and climate change. Unless appropriate actions are taken, the ongoing process of development in some parts of the world, particularly in some tropical developing countries like Indonesia, will enhance climate change, threatening the lives of future generations.

The conference was organized jointly by the School of Architecture, Tanri Abeng University, Indonesia, London Metropolitan University, UK, and Herriot Watt University, UK, aiming to gather information and share ideas from researchers, building scientists, architects, building engineers, urban designers, lectures, students, etc., regarding to the current problems of the built environment due to climate change. The identification of the current problems of the built environment would be of importance in order to find a way to overcome these problems. It is expected that, from the conference, some ideas and strategies would come up regarding how to mitigate and to adapt our built environment for climate change.

Articles in this Special Issue cover a range of various discussions. The need to establish an appropriate thermal comfort standard, in a particular country and in particular location with a particular climate, is still an interesting area, which has been discussed in this issue. The appropriate comfort standard expectedly would provide a better thermal environment and, at the same time, minimizing the use of energy for cooling. Some current comfort standards are suggesting indoor temperatures in a tropical climate that are too low, encouraging people to use more energy for cooling purposes, while, at the same time, building occupants suffer from being uncomfortably cool.

A number of articles discuss the way to reduce cooling energy in tropical buildings by means of passive design and also by minimizing the Urban Heat Island (UHI) effect in urban areas. Buildings are to be designed in such a way that solar heat gain is minimized, thus, low indoor temperature can be achieved with minimum help from air conditioners or fans. On the other hand, minimizing the UHI effect in surrounding buildings, by means of planting vegetation, would reduce the air temperature of the surrounding environment of the buildings. Having low outdoor temperatures in a tropical climate would help buildings to have low indoor temperature without depending too much on air conditioners, thus, minimizing the use of energy and reducing the carbon emissions. Another paper in this Special Issue is dealing with the way to reduce the consumption of Earth resources in ecotourism facilities. Reducing the consumption of Earth resources would directly reduce the ecological footprint levels of people and the region, and would help to maintain the sustainability of the built environment.

Prof. Dr. Tri Harso Karyono
Guest Editor

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Keywords

  • building
  • built environment
  • carbon dioxide
  • climate change
  • earth’s resources
  • energy consumption
  • housing

Published Papers (6 papers)

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Research

1116 KiB  
Article
Life Cycle Assessment of Energy and CO2 Emissions for Residential Buildings in Jakarta and Bandung, Indonesia
by Usep Surahman, Tetsu Kubota and Osamu Higashi
Buildings 2015, 5(4), 1131-1155; https://doi.org/10.3390/buildings5041131 - 15 Oct 2015
Cited by 21 | Viewed by 8849
Abstract
The objective of this study is to analyze life cycle energy and CO2 emission profiles by employing an input–output analysis method for urban houses in major cities of Indonesia. Two surveys investigating building material inventory and household energy consumption within individual houses [...] Read more.
The objective of this study is to analyze life cycle energy and CO2 emission profiles by employing an input–output analysis method for urban houses in major cities of Indonesia. Two surveys investigating building material inventory and household energy consumption within individual houses were conducted in Bandung in 2011 and 2012. The results show that, if reused and recycled materials were assumed to be zero, the averaged embodied energy for simple, medium and luxurious houses in Bandung was larger than that for their respective houses in Jakarta. Overall, the average annual energy consumption of all samples in Jakarta was approximately 20.6 GJ, which is 5.0 GJ larger than that in Bandung. In terms of life cycle energy, the operational energy accounted for 79%–86% and 69%–81% of the total for respective houses in Jakarta and Bandung. The profiles of life cycle CO2 emissions are similar to those of energy. The results of the scenario analysis prove that the promotion of reusing/recycling is important to reduce building material inputs/waste and their corresponding embodied energy. It is also important to reduce the use of air-conditioning for operational energy in the future by adopting passive cooling techniques wherever possible. Full article
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643 KiB  
Article
Human Body Exergy Balance: Numerical Analysis of an Indoor Thermal Environment of a Passive Wooden Room in Summer
by Koichi Isawa
Buildings 2015, 5(3), 1055-1069; https://doi.org/10.3390/buildings5031055 - 14 Sep 2015
Cited by 3 | Viewed by 6450
Abstract
To obtain a basic understanding of the resultant changes in the human body exergy balance (input, consumption, storage, and output) accompanying outdoor air temperature fluctuations, a “human body system and a built environmental system” coupled with numerical analysis was conducted. The built environmental [...] Read more.
To obtain a basic understanding of the resultant changes in the human body exergy balance (input, consumption, storage, and output) accompanying outdoor air temperature fluctuations, a “human body system and a built environmental system” coupled with numerical analysis was conducted. The built environmental system assumed a wooden room equipped with passive cooling strategies, such as thermal insulation and solar shading devices. It was found that in the daytime, the cool radiation exergy emitted by surrounding surfaces, such as walls increased the rate of human body exergy consumption, whereas the warm radiant exergy emitted by the surrounding surfaces at night decreased the rate of human body exergy consumption. The results suggested that the rates and proportions of the different components in the exergy balance equation (exergy input, consumption, storage, and output) vary according to the outdoor temperature and humidity conditions. Full article
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1173 KiB  
Article
Adaptive Thermal Comfort in Japanese Houses during the Summer Season: Behavioral Adaptation and the Effect of Humidity
by Hom B. Rijal, Michael Humphreys and Fergus Nicol
Buildings 2015, 5(3), 1037-1054; https://doi.org/10.3390/buildings5031037 - 11 Sep 2015
Cited by 63 | Viewed by 8435
Abstract
In order to clarify effect of humidity on the room temperatures reported to be comfortable, an occupant thermal comfort and behavior survey was conducted for five summers in the living rooms and bedrooms of residences in the Kanto region of Japan. We have [...] Read more.
In order to clarify effect of humidity on the room temperatures reported to be comfortable, an occupant thermal comfort and behavior survey was conducted for five summers in the living rooms and bedrooms of residences in the Kanto region of Japan. We have collected 13,525 thermal comfort votes from over 239 residents of 120 homes, together with corresponding measurements of room temperature and humidity of the air. The residents were generally well-satisfied with the thermal environment of their houses, with or without the use of air-conditioning, and thus were well-adapted to their thermal conditions. The humidity was found to have very little direct effect on the comfort temperature. However, the comfort temperature was strongly related to the reported skin moisture. Behavioral adaptation such as window opening and fan use increase air movement and improve thermal comfort. Full article
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358 KiB  
Article
Investigation on Hourly and Monthly Thermal Comfort in the Humid Tropics of Malaysia
by Harimi Djamila, Chu Chi Ming and Sivakumar Kumaresan
Buildings 2015, 5(3), 1025-1036; https://doi.org/10.3390/buildings5031025 - 11 Sep 2015
Cited by 12 | Viewed by 4767
Abstract
Investigations on hourly and monthly indoor neutral temperature variations in the humid tropics are limited in literature. In Malaysia, the variation of hourly outdoor mean temperature is slightly higher than the monthly mean temperature. Consequently, this leads to the hypothesis that the variation [...] Read more.
Investigations on hourly and monthly indoor neutral temperature variations in the humid tropics are limited in literature. In Malaysia, the variation of hourly outdoor mean temperature is slightly higher than the monthly mean temperature. Consequently, this leads to the hypothesis that the variation of hourly neutral temperatures might be higher than the monthly neutral temperatures. Understanding the impact of hourly and monthly temperature variation on thermal comfort will certainly provide the design direction of future indoor environments. In this study, extensive measurements from residential buildings were used to investigate the observed variation. Linear regression and Griffiths methods were explored for analyzing the results. There was almost no variation on hourly and monthly neutral temperatures within the range under study. Further research is highly recommended due to the limited data collection and the limitations of the employed methods. It is highly advised to further investigate the hourly temperature variation on thermal comfort during nighttime and early morning. This is for an accurate interpretation of the results. Full article
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6450 KiB  
Article
Configuration of Green Spaces for Urban Heat Island Mitigation and Future Building Energy Conservation in Hanoi Master Plan 2030
by Andhang Rakhmat Trihamdani, Han Soo Lee, Tetsu Kubota and Tran Thi Thu Phuong
Buildings 2015, 5(3), 933-947; https://doi.org/10.3390/buildings5030933 - 20 Aug 2015
Cited by 20 | Viewed by 8434
Abstract
The study aims to assess the urban heat island (UHI) effects in the city under the present land use conditions as well as those conditions proposed by the Hanoi Master Plan 2030 through numerical simulation, using Weather Research and Forecasting (WRF). Furthermore, this [...] Read more.
The study aims to assess the urban heat island (UHI) effects in the city under the present land use conditions as well as those conditions proposed by the Hanoi Master Plan 2030 through numerical simulation, using Weather Research and Forecasting (WRF). Furthermore, this paper assesses additional land use scenarios with different spatial and green space configurations. The results show that the implementation of the master plan does not significantly affect the peak air temperature in the built-up areas (approximately 1 °C higher at the maximum). However, high temperature areas, with temperature of 40–41 °C, would expand widely over the new built-up areas. On the other hand, the nocturnal air temperature would increase by up to 2–3 °C over the newly expanded built-up areas. The number of hotspots increased further when the strategic green spaces in the master plan were not taken into account. However, the cooling effect of the strategic green spaces did not reach the existing city center sufficiently because the green spaces are located far from the city center. The large and centralized green spaces proposed in the master plan were seen to be insufficient to mitigate UHIs compared to the equally distributed green spaces. Moreover, the greater reduction of hotspot areas by up to 56.5% was seen when the mixed forest is employed as the land cover in the green spaces. Full article
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291 KiB  
Article
Predicting Comfort Temperature in Indonesia, an Initial Step to Reduce Cooling Energy Consumption
by Tri Harso Karyono
Buildings 2015, 5(3), 802-813; https://doi.org/10.3390/buildings5030802 - 21 Jul 2015
Cited by 30 | Viewed by 6317
Abstract
Indonesia has no reliable thermal comfort standard that is based on research works. The current national standard (SNI 6390:2011) states only a single range of comfort temperature that is 25.5 °C Ta, with a range of +1.5 °C Ta. [...] Read more.
Indonesia has no reliable thermal comfort standard that is based on research works. The current national standard (SNI 6390:2011) states only a single range of comfort temperature that is 25.5 °C Ta, with a range of +1.5 °C Ta. Previous thermal studies in a number of different buildings in Indonesia showed that the neutral (comfort) temperatures of subjects were about 27 to 28 °C, which is higher than the values stated in the standard. As a big country with various ambient temperatures, Indonesian needs a better and more reliable thermal comfort predictor which can be applied properly across the country. This study is an attempt to propose an initial Indonesian thermal predictor, in the form of a simple equation, which could predict comfort temperatures properly across the country. Reanalysing the previous comfort studies in Indonesia, a simple regression equation is constructed as to be used as the initial Indonesian comfort predictor. Using this predictor, the comfort temperatures in a lowland or coastal cities like Jakarta is found to be higher than the current comfort standard. It is expected that this predictor would help to provide a better indoor thermal environment and at the same reduce the cooling energy in air conditioning (AC) building, thus reducing a building’s carbon emissions. Full article
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