An investigation of indoor thermal environment in semi-cold region in Japan – Validity of thermal predictive indices in Nagano during the summer season

2020 ◽  
pp. 101897
Author(s):  
Hiroki Ikeda ◽  
Takashi Nakaya ◽  
Akito Nakagawa ◽  
Yoshihiro Maeda
Keyword(s):  
Thermal Environment ◽  
Summer Season ◽  
Cold Region ◽  
Indoor Thermal Environment

scholarly journals Investigation of indoor thermal environment in a rural house in Daqing

2018 ◽  
Vol 22 (Suppl. 2) ◽  
pp. 759-767
Author(s):  
Xiaoyan Liu ◽  
Ruiyi Sun ◽  
Keqin Gong ◽  
Fanbin Meng ◽  
Lijun Liu
Keyword(s):  
Rural Population ◽  
Thermal Environment ◽  
Residential Building ◽  
Simulation Method ◽  
Building Envelope ◽  
Poor People ◽  
Heilongjiang Province ◽  
Cold Region ◽  
Obvious Effect ◽  
Indoor Thermal Environment

At present, the rural population of China is large. The rural population accounts for about 50% of the total population in Heilongjiang Province, which is located in cold region. The winter is cold in severe cold region, for example, the average outdoor temperature in winter is about ?25?C in Daqing which is located in Heilongjiang Province, the indoor residential thermal environment is poor, people living there are uncomfortable. The existing rural residential building was researched in Daqing of Heilongjiang and the study of the indoor thermal environment was carried out. In this paper, the numerical simulation method is used to study the changes of indoor temperature field before and after adopting the wall insulation of existing house. The results show that the thermal environment of the existing rural house without wall insulation can not satisfy the requirements of human comfort, and the bedroom temperature is about 15?C, and the temperature of the entrance hall is about 11?C. However, the insulation of the building envelope has an obvious effect on the indoor thermal environment, and the temperature of the bedroom and the entrance hall increase about 5?C and 3?C with wall insulation, respectively.

scholarly journals Improvements in Energy Saving and Thermal Environment after Retrofitting with Interior Insulation in Intermittently Cooled Residences in Hot-Summer/Cold-Winter Zone of China: A Case Study in Chengdu

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2776
Author(s):  
Xin Ye ◽  
Jun Lu ◽  
Tao Zhang ◽  
Yupeng Wang ◽  
Hiroatsu Fukuda
Keyword(s):  
Energy Saving ◽  
Thermal Environment ◽  
Real Life ◽  
Average Energy ◽  
Experimental Result ◽  
Cold Winter ◽  
The South ◽  
Indoor Thermal Environment ◽  
Space Cooling

Space cooling is currently the fastest-growing end-user in buildings. The global warming trend combined with increased population and economic development will lead to accelerated growth in space cooling in the future, especially in China. The hot summer and cold winter (HSCW) zone is the most densely populated and economically developed region in China, but with the worst indoor thermal environment. Relatively few studies have been conducted on the actual measurements in the optimization of insulation design under typical intermittent cooling modes in this region. This case study was conducted in Chengdu—the two residences selected were identical in design, but the south bedroom of the case study residence had interior insulation (inside insulation on all opaque interior surfaces of a space) retrofitted in the bedroom area in 2017. In August 2019, a comparative on-site measurement was done to investigate the effect of the retrofit work under three typical intermittent cooling patterns in the real-life scenario. The experimental result shows that interior insulation provides a significant improvement in energy-saving and the indoor thermal environment. The average energy savings in daily cooling energy consumption of the south bedroom is 42.09%, with the maximum reaching 48.91%. In the bedroom with interior insulation retrofit, the indoor temperature is closer to the set temperature and the vertical temperature difference is smaller during the cooling period; when the air conditioner is off, the room remains a comfortable temperature for a slightly longer time.

Effects of thermal environment on elderly in urban and rural houses during heating season in a severe cold region of China

2019 ◽  
Vol 198 ◽  
pp. 61-74 ◽  
Author(s):  
Huibo Zhang ◽  
Ya Chen ◽  
Jingwen Rui ◽  
Hiroshi Yoshino ◽  
Jinfeng Zhang ◽  
...  
Keyword(s):  
Thermal Environment ◽  
Heating Season ◽  
Cold Region

scholarly journals A Field Study on the Indoor Thermal Environment of the Airport Terminal in Tibet Plateau in Winter

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Jianglong Zhen ◽  
Jun Lu ◽  
Guangqin Huang ◽  
Liyue Zeng ◽  
Jianping Lin ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Thermal Environment ◽  
Vertical Direction ◽  
Outer Zone ◽  
Tibet Plateau ◽  
Indoor Thermal Environment ◽  
Airport Terminal ◽  
Globe Temperature ◽  
Environment Parameters ◽  
Radiant Floor Heating

In order to study the characteristics of indoor thermal environment in the airport terminal in Tibet Plateau with radiant floor heating in winter, a field measurement of the indoor thermal environment was conducted in Lhasa Gonggar Airport terminal 2. First, the unique climate characteristics in Tibet Plateau were analyzed through comparison of meteorological parameters in Beijing and Lahsa. The thermal environment in the terminal was divided into outer zone and inner zone as well as south zone and north zone. Thermal environment parameters including air temperature, black globe temperature, relative humidity in each zone, and inner surface temperature of envelope were measured and analyzed. Meanwhile, temperature and relative humidity in the vertical direction were measured. In addition, PMV and PPD were calculated for evaluating the thermal environment in the terminal. The findings can provide guidance for the design and regulation of thermal environment in terminals in Tibet Plateau in China.

Numerical Simulation of Indoor Thermal Environment of a Double-Skin Facade Office with Different Shutter Angles

2014 ◽  
Vol 694 ◽  
pp. 256-259
Author(s):  
Xin Zhan ◽  
Hua Yang ◽  
Feng Yun Jin
Keyword(s):  
Heat Transfer ◽  
Thermal Environment ◽  
Ventilation Rate ◽  
Air Distribution ◽  
Indoor Thermal Environment ◽  
Double Skin ◽  
Computational Fluid Dynamics Cfd ◽  
Heat Transfer Simulation ◽  
Shading Devices ◽  
Rng Turbulence Model

Airflow and heat transfer simulation was conducted for a double-skin façade (DSF) system equipped with shading devices in the cavity, using computational fluid dynamics (CFD) with RNG turbulence model and PISO algorithm, for five conditions of slat angles (θ=0°, 30°, 45°, 60°, 90°). The present study indicates that the presence of shading devices influences the temperatures, the ventilation rate and the air distribution in the DSF system. Besides, the different angles will make different influences.

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