Md Din Mohd Fadhil, Lee Yee Yong, Ponraj Mohanadoss, Ossen Dilshan Remaz, Iwao Kenzo, Chelliapan Shreeshivadasan
Water Research Alliance, Institute of Environmental Water Resources and Management (IPASA), Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia, UTM Johor Bahru, 81310, Malaysia.
Department of Architecture, Faculty of Built Environment, Universiti Teknologi Malaysia, UTM Skudai, 81310 Johor, Malaysia.
J Therm Biol. 2014 Apr;41:6-15. doi: 10.1016/j.jtherbio.2014.01.004. Epub 2014 Feb 4.
Recent years have seen issues related to thermal comfort gaining more momentum in tropical countries. The thermal adaptation and thermal comfort index play a significant role in evaluating the outdoor thermal comfort. In this study, the aim is to capture the thermal sensation of respondents at outdoor environment through questionnaire survey and to determine the discomfort index (DI) to measure the thermal discomfort level. The results indicated that most respondents had thermally accepted the existing environment conditions although they felt slightly warm and hot. A strong correlation between thermal sensation and measured DI was also identified. As a result, a new discomfort index range had been proposed in association with local climate and thermal sensation of occupants to evaluate thermal comfort. The results had proved that the respondents can adapt to a wider range of thermal conditions.Validation of the questionnaire data at Putrajaya was done to prove that the thermal sensation in both Putrajaya and UTM was almost similar since they are located in the same tropical climate region. Hence, a quantitative field study on building layouts was done to facilitate the outdoor human discomfort level based on newly proposed discomfort index range. The results showed that slightly shaded building layouts of type- A and B exhibited higher temperature and discomfort index. The resultant adaptive thermal comfort theory was incorporated into the field studies as well. Finally, the study also showed that the DI values were highly dependent on ambient temperature and relative humidity but had fewer effects for solar radiation intensity.
近年来，与热舒适度相关的问题在热带国家愈发受到关注。热适应和热舒适指数在评估室外热舒适度方面发挥着重要作用。在本研究中，旨在通过问卷调查捕捉受访者在室外环境中的热感觉，并确定不适指数（DI）以衡量热不适程度。结果表明，尽管大多数受访者感觉有点温暖和炎热，但他们在热方面接受了现有的环境条件。还发现热感觉与测量的DI之间存在很强的相关性。因此，结合当地气候和居住者的热感觉，提出了一个新的不适指数范围来评估热舒适度。结果证明受访者能够适应更广泛的热条件范围。对布城的问卷数据进行了验证，以证明布城和马来西亚理工大学的热感觉几乎相似，因为它们位于同一热带气候区域。因此，基于新提出的不适指数范围，对建筑布局进行了定量实地研究，以了解室外人体不适程度。结果表明，A型和B型略有遮阳的建筑布局表现出较高的温度和不适指数。由此产生的适应性热舒适理论也被纳入实地研究。最后，研究还表明，DI值高度依赖于环境温度和相对湿度，但对太阳辐射强度的影响较小。
