Статті в журналах: "Summer thermal comfort"

1

Hughes, Caroline, and Sukumar Natarajan. "Summer thermal comfort and overheating in the elderly." Building Services Engineering Research and Technology 40, no. 4 (April 24, 2019): 426–45. http://dx.doi.org/10.1177/0143624419844518.

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Atypically warm summers such as 2003 and 2018 are predicted to become normal by 2050. If current climate projections are accurate, this could cause heat-related mortality to rise by 257% by 2050, the majority of which will be in vulnerable groups such as the elderly. However, little is known about the temperatures achieved in the homes of the elderly even in typical summers, and even less on whether these are comfortable. This study examines, for the first time, the validity of current thermal comfort models in predicting summer comfort levels in the 65+ demographic over a typical and an atypically warm summer. This was achieved through the first longitudinal study of thermal conditions in homes of the elderly in the South West UK, utilising repeated standardised monthly thermal comfort and health surveys with continuous temperature monitoring in both living and bed rooms. Results show that neither the PMV/PPD model (ISO 7730) nor the adaptive model (ISO 15251) accurately predict true thermal comfort in our sample. Overheating analysis using CIBSE TM59 (based on ISO 15251) suggests significantly more homes (50% living room, 94% bed room = 94% overall) overheated during the atypically warm summer, compared to the typical summer (3% living room, 57% bed room = 57% overall). These are worrying results, especially for the elderly, given the projected increases in both the severity and the frequency of extreme summers in a future, changed, climate. Practical application: This paper provides new data on the performance of the homes of the elderly in both a typical and atypically warm summer. Our results could be considered for building performance evaluation in homes with elderly occupants to mitigate overheating risk. Crucially, we not only examine the impact of CIBSE criteria on these homes but also look at thermal acceptance, which is important to understand the true impact of elevated temperatures in this demographic.

2

den Ouden, Cees. "Thermal analysis for summer comfort in buildings." Solar Energy 60, no. 1 (January 1997): 61. http://dx.doi.org/10.1016/s0038-092x(97)84698-1.

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3

Zhang, Lili, Dong Wei, Yuyao Hou, Junfei Du, Zu’an Liu, Guomin Zhang, and Long Shi. "Outdoor Thermal Comfort of Urban Park—A Case Study." Sustainability 12, no. 5 (March 4, 2020): 1961. http://dx.doi.org/10.3390/su12051961.

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Urban parks are an important component of urban public green space and a public place where a large number of urban residents choose to conduct outdoor activities. An important factor attracting people to visit and stay in urban parks is its outdoor thermal comfort, which is also an important criterion for evaluating the liability of the urban environment. In this study, through field meteorological monitoring and a questionnaire survey, outdoor thermal comfort of different types of landscape space in urban parks in Chengdu, China was studied in winter and summer. Result indicated that (1) different types of landscape spaces have different thermal comforts, (2) air temperature is the most important factor affecting outdoor thermal comfort; (3) because the thermal sensation judgment of outdoor thermal comfort research in Chengdu area, an ASHRAE seven-sites scale can be used; (4) the neutral temperature ranges of Physiological Equivalent Temperature (PET) and Universal Thermal Climate Index (UTCI) in Chengdu in winter and summer were obtained through research; (5) and UTCI is the best index for evaluating outdoor thermal comfort in Chengdu. These findings provide theoretical benchmarks and technical references for urban planners and landscape designers to optimize outdoor thermal comfort in urban areas to establish a more comfortable and healthy living environment for urban residents.

4

Mayer, Helmut, Jutta Holst, Paul Dostal, Florian Imbery, and Dirk Schindler. "Human thermal comfort in summer within an urban street canyon in Central Europe." Meteorologische Zeitschrift 17, no. 3 (June 23, 2008): 241–50. http://dx.doi.org/10.1127/0941-2948/2008/0285.

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5

Berger, X. "Human thermal comfort at Nı̂mes in summer heat." Energy and Buildings 33, no. 3 (February 2001): 283–87. http://dx.doi.org/10.1016/s0378-7788(00)00093-1.

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6

Kong, Qinqin, Jingyun Zheng, Hayley J. Fowler, Quansheng Ge, and Jianchao Xi. "Climate change and summer thermal comfort in China." Theoretical and Applied Climatology 137, no. 1-2 (October 6, 2018): 1077–88. http://dx.doi.org/10.1007/s00704-018-2648-5.

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7

Huang, Xianfeng, and Chen Qu. "Research on Indoor Thermal Comfort and Age of Air in Qilou Street Shop under Mechanical Ventilation Scheme: A Case Study of Nanning Traditional Block in Southern China." Sustainability 13, no. 7 (April 5, 2021): 4037. http://dx.doi.org/10.3390/su13074037.

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In hot summers, air conditioning (AC) and mechanical ventilation (such as fans) are used as cooling modes that strongly influence the resultant indoor environment, like thermal comfort and air quality in the shops of a Nanning arcade street (qilou). The air circulation mode in shops greatly affects the indoor thermal environment and level of air freshness. The approaches for effectively improving the indoor thermal comfort and air quality are developed in qilou street shops with air-conditioner in a humid and hot region in southern China. Consequently, the purpose of this study is to assess different ventilation schemes in order to identify the best one. By using two indices, i.e., the predicted mean vote (PMV) and the age of air (AoA), in situ measurement and numerical simulation are conducted to investigate humans’ thermal comfort in extreme summer. Then, the indoor thermal comfort and AoA levels in summer under three different ventilation schemes (upper-inlet–upper-outlet, upper-inlet–bottom-outlet, and side-inlet–side-outlet) are comparatively analyzed through numerical computations of the indoor thermal environment. The results show that the upper-inlet–upper-outlet mode of the AC ventilation scheme led to the creation of a favorable air quality and comfortable thermal environment inside the shop, which will help designers understand the influence of the ventilation scheme on the indoor thermal comfort and health environment.

8

Lau, Kevin Ka-Lun, and Chun Yin Choi. "The influence of perceived environmental quality on thermal comfort in an outdoor urban environment during hot summer." Journal of Physics: Conference Series 2042, no. 1 (November 1, 2021): 012047. http://dx.doi.org/10.1088/1742-6596/2042/1/012047.

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Abstract Thermal comfort in outdoor spaces is essential for human health and human wellbeing. A comfortable outdoor space enhances urban livability and sustainability. Previous studies on outdoor human thermal comfort highlighted that apart from the microclimate conditions, the psychological and physiological factors play an important role in human thermal comfort. The influence of environmental quality on human thermal comfort is being examined in this paper. A survey with a total of 1842 thermal comfort responses was conducted during a hot summer in Hong Kong. Perceived aesthetic and acoustic quality votes are strongly associated with Thermal Sensation Votes (TSV). Thermal Comfort Votes (TCV) in the satisfied aesthetic group and the satisfied acoustic group are significantly higher than that in the not satisfied group. A sensation of comfort was confirmed by 39.8% and 38.4% of participants in the satisfied aesthetic group and the satisfied acoustic group, while only 22.2% and 23.9% of the members of the not satisfied group felt comfortable. The study suggested that the perceived environmental qualities are highly associated with thermal sensation and thermal comfort, and a beautiful and quiet environment can improve the thermal comfort and thermal tolerance.

9

Fan, Qindong, Fengtian Du, Hu Li, and Chenming Zhang. "Thermal-comfort evaluation of and plan for public space of Maling Village, Henan, China." PLOS ONE 16, no. 9 (September 20, 2021): e0256439. http://dx.doi.org/10.1371/journal.pone.0256439.

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The thermal environment of village public space affects the comfort of people ’ s outdoor activities, and then affects the willingness of residents to outdoor activities, which has an important impact on the villagers’ quality of life. Previously published studies of thermal comfort mostly focused on the evaluation of thermal comfort index, few studies on the application of thermal comfort planning. The study was carried out in Maling Village, Changdai Town, Mengjin County, Luoyang City, Henan Province, China. Square, street, green space were chosen as three typical public spaces where thermal comfort indexes were measured by questionnaire survey and field measurement during summer. Subsequently, the village’s microclimate environment was simulated with ArcGIS 10.6 and ENVI-met. The results indicate that during the summer, the influences of temperature, solar radiation, wind speed, and relative humidity on the subjective comfort conditions of the outdoor environment gradually decreased. The spatial form of village has an important influence on thermal comfort. Finally, based on the results, this study put forward the thermal comfort process and planning scheme of the village outdoor space.

10

Wu, Shi Jie, and Zeng Feng Yan. "Indoor Thermal Environment Simulation of Xi'an Residential Building in Summer." Advanced Materials Research 512-515 (May 2012): 2882–86. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2882.

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Natural ventilation is an important role to improve the residential building indoor thermal environment in summer. This paper use Energy Plus to simulate indoor thermal environment and use CFD to simulate indoor air flow for Xi’an residential building, analysis the influence that different ventilation mode for indoor thermal environment factors. Then with the simulated result of PMV-PPD value to estimate indoor thermal comfort. Proved night ventilation is necessary in residential building in Xi’an and effectiveness to improve indoor thermal comfort.

11

Konstantinov, Pavel, Diana Tattimbetova, Mikhail Varentsov, and Natalia Shartova. "Summer thermal comfort in Russian big cities (1966-2015)." Geographica Pannonica 25, no. 1 (2021): 35–41. http://dx.doi.org/10.5937/gp25-29440.

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The main goal of the study is the assessment of modern bioclimatic conditions (1966-2015) for determining the level of comfort in large Russian cities based on the observations at the meteorological stations, including Physiological Equivalent Temperature (PET) for the main extent of thermal comfort. According to the distribution of thermal stress events (calculated for meteorological fix hours, 8 times per day) the authors created the comfort diagram for each city during daytime heat wave period and evaluated their comfort conditions. In the current research we are operating with WMO climatic data for eleven biggest cities of the Russian Federation: from the European part (Moscow, Saint-Petersburg, Ekaterinburg, Voronezh, Volgograd, Kazan, Nizhny Novgorod, Perm, Ufa) and from Siberia (Omsk and Krasnoyarsk). The most interesting result of the comparison of the long-period (50 years) urban trends (PET-index and Air Temperature) in different parts of Russia is its extraordinary cross-shaped form in Moscow (in other cities the trends lines are practically parallel to each other). It means that at the level of the average annual values, only in Moscow the PET index (and, hence, potentially the thermal stress) grows faster than the regional climate warms. In other cities this tendency is much weaker (N.Novgorod) or not significant. This interesting tendency is caused by both Moscow related urban planning dynamics in post-USSR period and by regional climate dynamics.

12

RIJAL, Hom Bahadur, Harunori YOSHIDA, and Noriko UMEMIYA. "SUMMER AND WINTER THERMAL COMFORT OF NEPALESE IN HOUSES." Journal of Architecture and Planning (Transactions of AIJ) 68, no. 565 (2003): 17–24. http://dx.doi.org/10.3130/aija.68.17_3.

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13

Shim, Huen Sup, and Woon Seon Jeong. "Suitability of Setting Summer Indoor Temperature for Thermal Comfort." Korean Journal of Community Living Science 24, no. 4 (December 31, 2013): 583–89. http://dx.doi.org/10.7856/kjcls.2013.24.4.583.

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14

Rus, Tania, Gheorghe Cruciat, Georgiana Nemeti, Roxana Mare, and Daniel Muresan. "Thermal comfort in maternity wards: Summer vs. winter conditions." Journal of Building Engineering 51 (July 2022): 104356. http://dx.doi.org/10.1016/j.jobe.2022.104356.

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15

Liu, Hong Juan, Jiang He, and Kai Qiong Liu. "Measurement and Questionnaire Survey on Indoor Thermal Environment of a Library in the Hot-Summer and Warm-Winter Region of China." Advanced Materials Research 671-674 (March 2013): 2664–69. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.2664.

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This study dealt with the indoor thermal environment of an university library in Nanning where is hot in summer and warm in winter. Measurements of air temperatures, relative humidity and air velocity etc. at selected points inside the library were conducted during a summer period. Analysis results of measurement data was described in the paper. Thermal comfort was analyzed based on questionnaire survery. This paper also provides suggestions for improving the indoor thermal environment and comfort as well as energy performance in library-like buildings in the hot-summer and warm-winter region.

16

Hong, Weiping, Junjie Liu, Jingjing Pei, and Dayi Lai. "Studies of Subjective Sleep Thermal Comfort and Adaptive Behaviors in Chinese Residential Buildings in Nine Cities." E3S Web of Conferences 111 (2019): 06049. http://dx.doi.org/10.1051/e3sconf/201911106049.

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Sleep thermal comfort greatly impacts the quality of sleep. For residents from different climate regions, their level of sleep thermal comfort may have a large difference due to the variations in climate, and other adaptive factors such as the changes in bedding system insulation, the use of air conditioners, and the opening of windows. To study the thermal comfort and adaptive behaviors of Chinese residents in different regions during sleeping period, this study conducted a long-term survey in nine cities in China from February 2018 to September 2018. For northern residents, they achieved a slight higher than neutral sleep thermal sensation in winter due to the use of central heating system. In summer, the sleep thermal sensation of severe cold (SC) region residents had a significant increase. In the south, although without central heating in winter, southern residents maintained a near neutral thermal sensation, partly because of the high bedding system insulation. Although the summer night outdoor air temperature was high in hot summer and cold winter (HSCW) and hot summer and warm winter (HSWW) regions, the occupants from the two regions actively used the air conditioners to help achieving sleep thermal comfort. The results of this study provide valuable information for designers, researchers, and policy makers to create a comfortable nighttime thermal environment in China.

17

Pokorný, Jan, Barbora Kopečková, Jan Fišer, and Miroslav JÍcha. "Simulator with integrated HW and SW for prediction of thermal comfort to provide feedback to the climate control system." EPJ Web of Conferences 180 (2018): 02085. http://dx.doi.org/10.1051/epjconf/201818002085.

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The aim of the paper is to assemble a simulator for evaluation of thermal comfort in car cabins in order to give a feedback to the HVAC (heating, ventilation and air conditioning) system. The HW (hardware) part of simulator is formed by thermal manikin Newton and RH (relative humidity), velocity and temperature probes. The SW (software) part consists of the Thermal Comfort Analyser (using ISO 14505-2) and Virtual Testing Stand of Car Cabin defining the heat loads of car cabin. Simulator can provide recommendation for the climate control how to improve thermal comfort in cabin by distribution and directing of air flow, and also by amount of ventilation power to keep optimal temperature inside a cabin. The methods of evaluation of thermal comfort were verified by tests with 10 test subjects for summer (summer clothing, ambient air temperature 30 °C, HVAC setup: +24 °C auto) and winter conditions (winter clothing, ambient air temperature -5 °C, HVAC setup: +18 °C auto). The tests confirmed the validity of the thermal comfort evaluation using the thermal manikin and ISO 14505-2.

18

Rusanescu, Carmen Otilia, Marin Rusanescu, Cosmin Jinescu, and Gigel Paraschi. "Influence of Thermal Comfort on Health." Revista de Chimie 70, no. 4 (May 15, 2019): 1187–91. http://dx.doi.org/10.37358/rc.19.4.7089.

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The purpose of this paper is to estimate the conditions of human comfort in Bucharest. To describe the influence of the climate on human health, several indices have been developed describing the degree of physiological comfort offered by the meteorological conditions, taking into account meteorological parameters registered daily by the weather station at the Polytechnic University of Bucharest, Faculty of Biotechnical Systems Engineering: temperature and relative air humidity, wind speed. The following indices were analyzed: summer SCHARLAU index (ISE), winter SCHARLAU index (ISH), thermohigrometric index (THI), wind cooling power (skin stress index) (P), temperature equivalent to cooling wind power Tpr, to determine the influence of thermal comfort on health.

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Budiawan, Wiwik, and Kazuyo Tsuzuki. "Thermal Comfort and Sleep Quality of Indonesian Students Living in Japan during Summer and Winter." Buildings 11, no. 8 (July 28, 2021): 326. http://dx.doi.org/10.3390/buildings11080326.

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Thermal comfort is crucial in satisfaction and maintaining quality sleep for occupants. In this study, we investigated the comfort temperature in the bedroom at night and sleep quality for Indonesian students during summer and winter. Eighteen male Indonesian students aged 29 ± 4 years participated in this study. The participants had stayed in Japan for about six months. We evaluated the sleep parameters using actigraphy performed during summer and winter. All participants completed the survey regarding thermal sensation, physical conditions, and subjective sleepiness before sleep. The temperature and relative humidity of participants’ bedrooms were also measured. We found that the duration on the bed during winter was significantly longer than that during summer. However, sleeping efficiency during winter was significantly worse than that during summer. The bedroom temperature of the participants was in the range of comfort temperature in Indonesia. With the average bedroom air temperature of 22.2 °C, most of the participants still preferred “warm” and felt “slightly comfortable” during winter. The average comfort temperature each season calculated using the Griffiths method was 28.1 °C during summer and 23.5 °C during winter. In conclusion, differences in adaptive action affect bedroom thermal conditions. Furthermore, habits encourage the sleep performance of Indonesian students.

20

Guclu, Yuksel. "Human Thermal Comfort Situation in the Goller (Lakes) District of Turkey." New Trends and Issues Proceedings on Advances in Pure and Applied Sciences, no. 7 (November 30, 2016): 137–44. http://dx.doi.org/10.18844/gjpaas.v0i7.3172.

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Abstract In this study, the determination of the human thermal comfort situation in the Goller District (in the Mediterranean Region) of Turkey has been aimed. In the direction of the aim, the air temperature and relative humidity data of total 11 meteorology stations have been examined according to The Thermo-hygrometric Index (THI) and the New Summer Simmer Index (SSI). According to this, it has been determined that the thermal comfort conditions are not appropriate in the period of October-May on average monthly. The months of June and September are the most appropriate to almost all kinds of tourism and recreation activities in the outdoor in terms of thermal comfort. When THI and SSI indices’ values are evaluated together, the periods between 5th – 25th June and 29th August-16th September are the most appropriate periods in the study area on average in terms of the thermal comfort for the tourism and recreation activities in the outdoor. Keywords: Thermal comfort, human health, The Thermo-Hygrometric Index, The Summer Simmer Index, Goller District, Turkey.

21

Ascione, Fabrizio, Nicola Bianco, Rosa Francesca De Masi, Margherita Mastellone, and Giuseppe Peter Vanoli. "Phase Change Materials for Reducing Cooling Energy Demand and Improving Indoor Comfort: A Step-by-Step Retrofit of a Mediterranean Educational Building." Energies 12, no. 19 (September 25, 2019): 3661. http://dx.doi.org/10.3390/en12193661.

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The present work concerns the energy retrofit of a public educational building at the University of Molise, located in Termoli, South Italy. The study provides a comparison of the results obtained by different dynamic simulations of passive strategies to improve thermal comfort and energy behavior of the building during the summer regime. Firstly, the building model was calibrated against historical consumption data. Then, a subsequent step involves the technical-economic analysis, by means of building performance simulations, of energy upgrading scenarios, specifically, cool roof and green roof technologies for the horizontal opaque envelope and thermal insulation, vented façade, and phase change materials’ applications for the vertical opaque envelope. Improving the indoor thermal comfort and reducing the thermal energy demand during summertime through innovative solutions will be the primary objective of the present study. The energy efficiency measures are compared from the energy, emissions, costs, and indoor comfort points of view. Phase Change Materials applied to the inner side of the external walls are analyzed in depth and, by varying their melting temperature, optimization of design is performed too. This innovative material, with a melting temperature of 23 °C and a freezing temperature of 21 °C, determines the reduction of summer energy consumption of 11.7% and the increase of summer indoor comfort of 215 h. Even if consolidated, other solutions, like the cool roof, green roof, thermal insulation, and vented façade induce improvements in terms of summer energy saving, and the percentage difference compared to the basic building is less than 2%. For this case study, a Mediterranean building, with construction characteristics typical of the 1990s, traditional passive technologies are not very efficient in improving the energy performance, so the investigation focused on the adoption of innovative solutions such as PCMs, for reducing summer energy demand and improving indoor thermal comfort.

22

Gong, Xinzhi, Qinglin Meng, and Yilei Yu. "A Field Study on Thermal Comfort in Multi-Storey Residential Buildings in the Karst Area of Guilin." Sustainability 13, no. 22 (November 18, 2021): 12764. http://dx.doi.org/10.3390/su132212764.

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It is important to consider reducing energy use while improving occupants’ indoor thermal comfort. The actual thermal comfort needs and demands should be considered to determine the indoor thermal environment design. In previous studies, research has not been carried out on thermal comfort in karst areas. Thus, a long-term field investigation was carried out on multi-storey residential buildings in the karst area of Guilin city centre during summer (from August 2019 to September 2019) and winter (from December 2019 to January 2020). In this study, the indoor thermal environments of three categories of dwellings were analysed. A total of 77 residential buildings with 144 households were randomly selected, and 223 occupants from 18 to 80 years old participated. A total of 414 effective questionnaires were collected from the subjects. The results show that there was an obvious conflict between the predicted mean vote (PMV) and the thermal sensation vote (TSV). The neutrality temperatures calculated by the regression method were 24.2 °C in summer and 16.2 °C in winter. The thermal comfort range was observed at operative temperatures of 20.9–27.5 °C in summer and 12.2–20.1 °C in winter. The desired thermal sensation for people in the Guilin karst area was not always reflected in the thermal neutrality range. A preference for warmness was identified in the survey.

23

Danca, Paul, Florin Bode, Angel Dogeanu, Cristiana Croitoru, Mihnea Sandu, Amina Meslem, and Ilinca Nastase. "Experimental study of thermal comfort in a vehicle cabin during the summer season." E3S Web of Conferences 111 (2019): 01048. http://dx.doi.org/10.1051/e3sconf/201911101048.

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Thermal comfort evaluation for vehicle occupants is very complicated due to the transient nature and non-uniformity of the vehicle interior. The thermal sensation of an automotive occupant is affected by the surrounding environment. More than this, the actual standard is proposing three evaluation indexes and was developed for steady state and controlled conditions and some of the indexes are not adapted for this complex environment. In this article the three standardized indexes values are compared in term of thermal comfort, in a vehicle passenger in summer season. The results are showing that the mean values of PMV/PPD model calculated in a single point with Comfort Sense equipment are far from the TSV mean values which was collected in questionnaires, while the teq index which was calculated with an advanced thermal manikin are closer to the TSV comfort votes. This may be explained by the fact that the TSV and teq consider the sensation for each body part at the local level. For a correct evaluation of the thermal comfort in non-uniform and transient environments like in the vehicles, is not enough to measure in a single point and the results to be considered in all the ambiance. The main conclusion is that the PMV/PPD indexes are not very well adapted to the vehicle environment.

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Huda, Listiani Nurul, Hiroshi Homma, and Hiroshi Matsumoto. "Effects of Faster Airflows on Human Thermal Comfort in Summer." Journal of Asian Architecture and Building Engineering 5, no. 1 (May 2006): 177–82. http://dx.doi.org/10.3130/jaabe.5.177.

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25

Li, Li, XiaoQing Zhou, and Lixiu Yang. "The Analysis of Outdoor Thermal Comfort in Guangzhou during Summer." Procedia Engineering 205 (2017): 1996–2002. http://dx.doi.org/10.1016/j.proeng.2017.10.070.

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Xu, Jingcheng, Qiaoling Wei, Xiangfeng Huang, Xiaoyan Zhu, and Guangming Li. "Evaluation of human thermal comfort near urban waterbody during summer." Building and Environment 45, no. 4 (April 2010): 1072–80. http://dx.doi.org/10.1016/j.buildenv.2009.10.025.

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27

Spentzou, Eftychia, Malcolm J. Cook, and Stephen Emmitt. "Modelling natural ventilation for summer thermal comfort in Mediterranean dwellings." International Journal of Ventilation 18, no. 1 (March 22, 2017): 28–45. http://dx.doi.org/10.1080/14733315.2017.1302658.

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28

Xystouris, Kyriakos S., Paris A. Fokaides, Panagiota Antoniadou, and Agis M. Papadopoulos. "Indoor thermal comfort conditions in summer under subtropical climate conditions." International Journal of Sustainable Energy 39, no. 4 (December 10, 2019): 396–411. http://dx.doi.org/10.1080/14786451.2019.1701472.

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29

Forcada, N., M. Gangolells, M. Casals, B. Tejedor, M. Macarulla, and K. Gaspar. "Summer thermal comfort in nursing homes in the Mediterranean climate." Energy and Buildings 229 (December 2020): 110442. http://dx.doi.org/10.1016/j.enbuild.2020.110442.

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30

Sayad, Bouthaina, Djamel Alkama, Hijaz Ahmad, Jamel Baili, Noufe H. Aljahdaly, and Younes Menni. "Nature-based solutions to improve the summer thermal comfort outdoors." Case Studies in Thermal Engineering 28 (December 2021): 101399. http://dx.doi.org/10.1016/j.csite.2021.101399.

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31

Conceição, Eusébio, João Gomes, and Hazim Awbi. "Influence of the Airflow in a Solar Passive Building on the Indoor Air Quality and Thermal Comfort Levels." Atmosphere 10, no. 12 (December 2, 2019): 766. http://dx.doi.org/10.3390/atmos10120766.

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The influence of the airflow in a solar passive building on the indoor air quality and thermal comfort levels was investigated. The numerical study for a university library was conducted using a software that simulates the building thermal behavior with complex topology, in transient conditions, for evaluating the indoor air quality and occupants’ thermal comfort levels for typical summer and winter days. Solar radiation was used as a renewable energy source to increase simultaneously the thermal comfort and air quality levels and reduce building energy consumption. Regarding the solar passive building, consideration was given to all of the building structure envelope, shading devices and interior details, while in the solar active building active ventilation was used. To analyze the airflow that simultaneously provides the best indoor air quality and thermal comfort levels, a new integral methodology based on the minimization of the total number of uncomfortable hours was used. The results show that it was possible to determine an air change rate that ensures a good compromise between thermal comfort and indoor air quality. An optimal air change rate of two and three renewals per hour had been determined, respectively, for winter and summer conditions.

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Liu, Zheming, Yumeng Jin, and Hong Jin. "The Effects of Different Space Forms in Residential Areas on Outdoor Thermal Comfort in Severe Cold Regions of China." International Journal of Environmental Research and Public Health 16, no. 20 (October 17, 2019): 3960. http://dx.doi.org/10.3390/ijerph16203960.

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In the context of global climate change and accelerated urbanization, the deterioration of the urban living environment has had a serious negative impact on the life of residents. However, studies on the effects of forms and configurations of outdoor spaces in residential areas on the outdoor thermal environment based on the particularity of climate in severe cold regions are very limited. Through field measurements of the thermal environment at the pedestrian level in the outdoor space of residential areas in three seasons (summer, the transition season and winter) in Harbin, China, this study explored the effects of forms and configurations of three typical outdoor spaces (the linear block, the enclosed block, and the square) on the thermal environment and thermal comfort using the Physiologically Equivalent Temperature (PET). The results show that the thermal environment of all outdoor space forms was relatively comfortable in the transition season but was uncomfortable in summer and winter. The full-enclosed block with a lower sky view factor (SVF) had a higher thermal comfort condition in summer and winter. The linear block with higher buildings and wider south–north spacing had a higher thermal comfort condition in summer and winter. When the buildings on the south side were lower and the south–north spacing was wider, the thermal environment of the square was more comfortable in winter.

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Onecha, Belén, and Alicia Dotor. "Simulation Method to Assess Thermal Comfort in Historical Buildings with High-Volume Interior Spaces—The Case of the Gothic Basilica of Sta. Maria del Mar in Barcelona." Sustainability 13, no. 5 (March 9, 2021): 2980. http://dx.doi.org/10.3390/su13052980.

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Concerns about the energy performance of heritage buildings have grown exponentially over the last decade. However, actions have been limited to reducing energy consumption and carbon emissions. Another perspective must be studied—the thermal comfort of users, for human welfare and health. The assessment of thermal comfort inside a historic building with a single, large volume interior space is not easy. The complexity increases if the building has high cultural protection and its envelope cannot be altered, to preserve its historical values. This paper focuses on this kind of building and describes a dynamic simulation method used to assess thermal comfort in the Gothic Basilica of Sta. Maria del Mar in Barcelona. The basilica’s interior thermal conditions are intense cold during the winter and extreme heat and sultriness during the summer. Several simulation scenarios were considered to highlight the failure to obtain thermal comfort for users through passive strategies during the summer period. When all the factors are considered, the only valid strategy is to introduce an active system. This must be minimized according to three criteria: reducing operational periods, considering just the air volume next to users and adjusting the level of comfort requirement.

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Andreoni-Trentacoste, Soledad Elisa, and Carolina Ganem-Karlen. "El rol activo del usuario en la búsqueda de confort térmico de viviendas en clima templado árido." Revista Hábitat Sustentable 11, no. 2 (December 30, 2021): 08–21. http://dx.doi.org/10.22320/07190700.2021.11.02.01.

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User behavior is one of the main factors of uncertainty in the thermal performance of a dwelling. This study contributes to identifying variables that would influence the user behavior and, in turn, how these affect the thermal performance of houses located in the city of Mendoza. For this, a thermal audit of a representative dwelling was made in summer and winter, while also recording occupancy and occupant actions. It was concluded that, in summer, correct management of the envelope through night cooling favors reaching indoor comfort in 89% of the recorded data. In winter, the correct use of direct solar gain favors reaching comfort in 60% of the recorded data. Finally, alternatives for building improvements are evaluated for the most unfavorable season.

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Gharbi, L., N. Ghrab-Morcos, and J. J. Roux. "Thermal and Airflow Modelling of Mediterranean Buildings: Application to Thermal Comfort in Summer." International Journal of Ventilation 4, no. 1 (June 2005): 37–48. http://dx.doi.org/10.1080/14733315.2005.11683697.

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Ma, Xuan, Mengying Wang, Jingyuan Zhao, Lei Zhang, and Wanrong Liu. "Performance of Different Urban Design Parameters in Improving Outdoor Thermal Comfort and Health in a Pedestrianized Zone." International Journal of Environmental Research and Public Health 17, no. 7 (March 27, 2020): 2258. http://dx.doi.org/10.3390/ijerph17072258.

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Global climate change and urban heat islands have generated heat stress in summer, which does harm to people’s health. The outdoor public commercial pedestrianized zone has an important role in people’s daily lives, and the utilization of this space is evaluated by their outdoor thermal comfort and health. Using microclimatic monitoring and numerical simulation in a commercial pedestrianized zone in Tai Zhou, China, this study investigates people’s outdoor thermal comfort in extreme summer heat. The final results provide a comprehensive system for assessing how to improve outdoor human thermal health. Under the guidance of this system, local managers can select the most effective strategy to improve the outdoor thermal environment.

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Kharchi, Razika, and Khaled Imessad. "Hygrothermal study of dwelling submitted to passive cooling." Thermal Science 22, no. 6 Part A (2018): 2597–604. http://dx.doi.org/10.2298/tsci160214289k.

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A significant portion of energy consumed in buildings is due to energy usage by heating, ventilation, and air conditioning systems. Free cooling is a good option for energy savings in the systems. In recent years, scientists, engineers, and architects designed successful and innovative buildings which use passive cooling techniques, such as natural ventilation. The house studied in the present work, is a pilot project undertaken jointly by the Centre for Development of Renewable Energies (CDER) and the National Centre for Studies and Research of the integrated building (CNERIB) in the framework of the MED-ENEC project (Mediterranean Energy Efficiency in Construction structure). The house under consideration has a surface area of 65 m2 and is located in the region of Algiers which characterized by a Mediterranean climate with relatively mild winters and a hot and humid summer. The aim of this work is to study the thermal comfort inside the house in summer without air conditioning systems, only ventilation is considered. The aim of this work is to study the effect of natural ventilation on both thermal and hygrometric comfort inside the house during the summer period. Numerical simulation is made using the TRNSYS software and the results obtained are in good agreement with measured values. The prototype home is designed in a way that natural ventilation allows thermal comfort which induced energy saving from air conditioning. The mean temperature measured in the interior of the house is 26?C. The relative humidity reaches about 70% in August. Thermal comfort is related to relative humidity that are the essential parameters of the feeling of comfort. Humidity is an important parameter in thermal comfort, it is why we can conclude that we have reached a relatively good hygrothermal comfort.

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Nakano, Junta, and Shin-ichi Tanabe. "Thermal Comfort Condition of Passengers in Naturally Ventilated Train Stations." E3S Web of Conferences 111 (2019): 02069. http://dx.doi.org/10.1051/e3sconf/201911102069.

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Train is the most frequently used means of transportation in Tokyo. Train stations are gaining attention as commercial complex today, and higher level of comfort is being demanded for the indoor environment. Open structure of the train station and semi-outdoor like environment suggest that the thermal comfort condition is relaxed compared to indoor comfort standards. The objective of this study is to investigate the thermal comfort condition within train stations and to clarify the appropriate target for environmental control. Field surveys were carried out in summer, autumn and winter during July 2004 to August 2006 in four train stations located in urban area of Tokyo. Concourses were not air-conditioned except one station where spot cooling was operated in summer near the ticket gate. Each survey was conducted from 7:00 to 20:00 for 3 to 11 days per season per station for a total of 81 days. The survey consisted of thermal environment measurement and thermal comfort questionnaire. More than 80% of passengers felt thermally comfortable within the range of 19 to 29 °C SET*. However, acceptability zone was found to be 19 to 32 °C SET*, and it is recommended to design naturally ventilated train stations to fulfil this target.

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Li, Chao, Hong Liu, Baizhan Li, and Aihong Sheng. "Seasonal effect of humidity on human comfort in a hot summer/cold winter zone in China." Indoor and Built Environment 28, no. 2 (January 10, 2018): 264–77. http://dx.doi.org/10.1177/1420326x17751594.

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Adaptation to different seasonal climates may affect human subjective responses to humidity. In this study, thermal comfort, humidity comfort and perceived air quality were investigated with subjects exposed in a climate chamber during spring, summer and winter. Sixty subjects were recruited in total, divided into groups of 20 subjects for each season. Temperature was set at three levels (cool, moderate and warm) during experiments in ranges of 20–28°C, 23–32°C, 16–28°C for spring, summer and winter, respectively. Likewise, relative humidity was set at three levels: 15% (low), 50% (moderate) and 85% (high). Results showed that seasonal difference had a significant effect on human subjective responses to humidity. The combined effect of temperature and relative humidity on thermal perception, humidity perception and perceived air quality was closely related to standard effective temperature (SET*), humidity ratio and air enthalpy, respectively. Comfort humidity ranges were 7.9–15.1 g/kg, 3.3–18.8 g/kg and 2.9–12.8 g/kg (humidity ratio) in spring, summer and winter, respectively. Overall, our results indicate that different comfort humidity limits should be considered for different seasons in the hot summer/cold winter zones of China.

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Xiong, Ke, Zhenjing Yang, and Canhua Cheng. "Microclimate Environmental Assessment and Impact of Mountain City Pedestrian Streets in Summer." E3S Web of Conferences 172 (2020): 11001. http://dx.doi.org/10.1051/e3sconf/202017211001.

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In mountainous cities, walking is an important form of transportation. The microclimate environment of pedestrian streets in summer affects the comfort of pedestrians, especially in hot summer cities. Besides, there are many height differences in mountainous city pedestrian streets, while existing researches of the thermal environment were mainly aimed at plain cities. We used typology to analyze different spatial patterns and tested microclimate of five kinds of streets in the Shanchengxiang of Chongqing. Then the universal thermal climate index (UTCI) was used to evaluate the thermal comfort of different spatial spaces. Firstly, the thermal environment of the mountain city street in summer is extremely uncomfortable and needs to be improved. Secondly, the sky view factor (SVF) has a great impact on the street thermal environment. Among all kinds of streets, the one-sided open B-N (SVF = 0.474) has the worst thermal environment, with an average UTCI of 44.7℃. However, the two-sided enclosed B2-B2 (SVF = 0.052) represents a better thermal environment, with an average UTCI of 35.5℃. The R2 value of 0.88 reflects that the linear correlation between UTCI and SVF is larger than that of H/W, whose R2 value is mere 0.04. Finally, different interfaces and enclosure forms have a great impact on space thermal comfort. This study quantifies the parameters that influence the design of pedestrian streets in mountain cities from the perspective of outdoor microclimate environmental assessment and provide a reference for the sustainable design of regional streets.

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Zhang, Wei, and Zhi Liu. "Gray Cluster Analysis on Thermal-Moisture Comfort of Bamboo Fiber Socks." Advanced Materials Research 295-297 (July 2011): 2041–44. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.2041.

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8 kinds of blended knitted socks with different materials of nylon filament, bamboo and cotton fibers are taken as research objectives with a view to investigating the thermal-moisture comfort of bamboo fiber socks. The sense of well-being, thermal conductivity, moisture regain, water vapor permeability, wicking height and air permeability of the socks are tested, and the thermal-moisture comfort of socks with different fiber contents are studied. By using the gray cluster analysis, the integrated evaluation of thermal-moisture comfort of the socks is conducted. The results shows that the socks containing bamboo fibers have better warm-retention and water vapor transmission properties, their thermal-moisture comfort are better than that of nylon filament and cotton fibers in summer.

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Ren, Zhibin, Yao Fu, Yunxia Du, and Hongbo Zhao. "Spatiotemporal patterns of urban thermal environment and comfort across 180 cities in summer under China’s rapid urbanization." PeerJ 7 (August 2, 2019): e7424. http://dx.doi.org/10.7717/peerj.7424.

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Background China is considered as the largest and most rapidly urbanizing nation in the world. However, possible changes of urban thermal environment and comfort under the rapid urbanization in China still remain poorly understood at a national scale. Methods Based on the data collected from 180 cities in 1990, 2005, and 2015 in China, the spatiotemporal patterns of urban thermal environment and comfort in summer and their relationships with urbanization variables were investigated in this study. Results Our results indicate that urban thermal environment has changed greatly during the 25 years. Furthermore, the changes of urban climate in different regions are inconsistent. The Physiological Equivalent Temperature (PET) at most cities (81%) in China increased from 1990 to 2015, which suggested that urban thermal comfort in China was also deteriorating during the 25 years. However, while the PET of some cities in China began to decrease from 2005 to 2015, there were still 33% of cities that had positive trends,which mainly located in North region. Urbanization resulted in a significant influence on urban climate. Compared to southern cities, northern cities were more sensitive to urbanization impact. The most important contribution to increasing of PET for urbanization variables is gross domestic product, followed by urban population. The analysis results reveal changing patterns of urban thermal comfort in China during summer season. It can help urban government and managers improve urban thermal environment and comfort.

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Baizhan Li, Wei Yu, Meng Liu, and Nan Li. "Climatic Strategies of Indoor Thermal Environment for Residential Buildings in Yangtze River Region, China." Indoor and Built Environment 20, no. 1 (January 10, 2011): 101–11. http://dx.doi.org/10.1177/1420326x10394495.

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Yangtze River Valley is situated within the Hot Summer and Cold Winter zone, and residents in this region of China would require HVAC system to alleviate thermal comfort conditions, although this is tempered by the Design Code (DBJ50-071-2007) for energy efficiency. A 1-year survey of about 200 residential homes was carried out in eight cities covering the breadth of the region. The acceptable temperature range for the residents in this area was 16.3—28.1°C and the thermal neutral temperature was found to be 27.6°C in summers and 17.5°C in winters. People in different area can vary in their adaptability and comfortableness. Therefore, there is a need to investigate the national comfort parameter introduced in the Code for Design of Heating and Ventilation and Air Conditioning (GB50019-2003). The results found that if air-conditioning system was set to 27.5°C instead of 26°C as required by GBJ19-87: Design Standard of Heating and Ventilation and Air Conditioning, a 16.5% saving of energy consumption could be achieved. The findings demonstrated the role of natural ventilation in the expansion of the thermal comfort zone for the residents, especially during the summer seasons. A climatic adaptability model has been established by this study to contribute to the passive climatic design strategies for a better economic and energy efficiency of buildings.

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Liang, Shuang, and Jia Ping Liu. "Discussion on Humidity Environment Passive Adjustment Methods in Hot Summer and Cold Winter Zone." Advanced Materials Research 224 (April 2011): 179–84. http://dx.doi.org/10.4028/www.scientific.net/amr.224.179.

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Humidity is one of the major factors affects the summer thermal environment in hot summer and cold winter zone. This article through calculation and analysis the humidity on environmental thermal comfort and influence of humidity the effect on the energy consumption, explain dehumidifying is one of the most efficient, energy saving measures to improve the hot summer and cold winter zone indoor thermal humidity environment. Aiming at the humidity environment characteristic in hot summer and cold winter zone, puts forward several design strategy of passive dehumidification for reference.

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Hu, Shaoying, and Takafumi Maeda. "Summer clothing characteristics and indoor-outdoor thermal comfort of Japanese youth." Journal of the Human-Environment System 22, no. 1 (2019): 17–29. http://dx.doi.org/10.1618/jhes.22.17.

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Aynsley, Richard. "Estimating summer wind driven natural ventilation potential for indoor thermal comfort." Journal of Wind Engineering and Industrial Aerodynamics 83, no. 1-3 (November 1999): 515–25. http://dx.doi.org/10.1016/s0167-6105(99)00098-7.

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ENDOH, Hiroharu, Fumitoshi KIKUCHI, Ayano SAITO, Sohei TSUJIMURA, and Nobuaki HAYASHI. "Experimental study on thermal comfort in main line vehicles in summer." Proceedings of the Transportation and Logistics Conference 2016.25 (2016): 1209. http://dx.doi.org/10.1299/jsmetld.2016.25.1209.

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Foruzanmehr, Ahmadreza. "Summer-time thermal comfort in vernacular earth dwellings in Yazd, Iran." International Journal of Sustainable Design 2, no. 1 (2012): 46. http://dx.doi.org/10.1504/ijsdes.2012.051479.

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Guo, Lan Xia, Xiao Yong Peng, Jian Xiang Liu, Xu Sheng Chai, Jing Jing Liang, and Zhi Qiu Fu. "Thermal Comfort Study of Wall Hanging Air-Conditioning Office in Summer." Advanced Materials Research 1008-1009 (August 2014): 1088–91. http://dx.doi.org/10.4028/www.scientific.net/amr.1008-1009.1088.

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Airpak was applied to numerically simulate the air distribution under the same air supply temperature ,different air supply velocity (3.6m/s、2.7m/s and 1.8m/s ) and air supply angle (+15°、-45° and-75°) , and evaluate thermal comfort by Comparative analysis velocity fields, temperature fields, PMV—PPD. The results show that different air supply velocity and air supply angle have a significant impact on indoor air distribution under the same air supply temperature. Air supply angle Plays a vital role in pattern and distribution of indoor flow field,air supply velocity mainly effect the magnitude of indoor velocity and temperature. Synthetically comparied, the model’s best supply parameters are supply velocity 2.7m/s and supply angle75°,which mean value of indoor PMV is-0.09, PPD is 8.5%.

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Yang, Wei, Yaolin Lin, Nyuk Hien Wong, and Junli Zhou. "Thermal comfort requirements in the summer season in subtropical urban spaces." Intelligent Buildings International 6, no. 4 (July 2, 2014): 224–38. http://dx.doi.org/10.1080/17508975.2014.933698.

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