Indoor thermal environment and comfort conditions in the temperate dry zone of Nigeria: case study of Zaria, Nigeria.

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.

Download Full-text

CASE STUDY ON INDOOR THERMAL ENVIRONMENT DURING WINTER AND ENERGY CONSUMPTION OF APARTMENT HOUSES IN COLD CLIMATIC REGION

AIJ Journal of Technology and Design ◽

10.3130/aijt.16.1015 ◽

2010 ◽

Vol 16 (34) ◽

pp. 1015-1018

Author(s):

Kahori GENJO ◽

Shin-ichi MATSUMOTO ◽

Ken-ichi HASEGAWA

Keyword(s):

Energy Consumption ◽

Thermal Environment ◽

Climatic Region ◽

Indoor Thermal Environment

Download Full-text

Effects of Building Microclimate on the Thermal Environment of Traditional Japanese Houses during Hot-Humid Summer

Buildings ◽

10.3390/buildings9010022 ◽

2019 ◽

Vol 9 (1) ◽

pp. 22 ◽

Cited By ~ 1

Author(s):

Ayaz Hosham ◽

Tetsu Kubota

Keyword(s):

Surface Temperature ◽

Thermal Environment ◽

Cooling Effect ◽

Shading Effect ◽

Indoor Thermal Environment ◽

Air Temperatures ◽

Outdoor Spaces ◽

Open Plan ◽

Indoor Spaces

The purpose of this study was to investigate the effects of building microclimate on the indoor thermal environment of traditional Japanese houses, focusing especially on the shading effect of trees as well as the cooling effect of spraying water. Basically, the indoor thermal environment was found to follow the outdoor conditions due to the open-plan and lightweight wooden structure. Nevertheless, air temperatures of the living rooms in the two case study houses were lower than the corresponding outdoors by approximately 0.5 °C and 2 °C, respectively. It was found that the semi-outdoor spaces acted as thermal buffers for promoting cross-ventilation as well as pre-cooling to provide “warm but breezy” conditions to the surrounding indoor spaces. The results showed that the surface temperature of semi-outdoor spaces can be reduced by shading and water spraying, among which shading has prolonged effects and water spraying can reduce the surface temperature during peak hours and the following night.

Download Full-text

Indoor Thermal Environment Long-Term Data Analytics Using IoT Devices in Korean Apartments: A Case Study

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17197334 ◽

2020 ◽

Vol 17 (19) ◽

pp. 7334

Author(s):

Hyunjun Yun ◽

Jinho Yang ◽

Byong Hyoek Lee ◽

Jongcheol Kim ◽

Jong-Ryeul Sohn

Keyword(s):

Real Time ◽

Thermal Environment ◽

Temperature Management ◽

Living Room ◽

Indoor Thermal Environment ◽

Long Term Monitoring ◽

Iot Devices ◽

Term Monitoring

IoT-based monitoring devices can transmit real-time and long-term thermal environment data, enabling innovative conversion for the evaluation and management of the indoor thermal environment. However, long-term indoor thermal measurements using IoT-based devices to investigate health effects have rarely been conducted. Using apartments in Seoul as a case study, we conducted long-term monitoring of thermal environmental using IoT-based real-time wireless sensors. We measured the temperature, relative humidity (RH), and CO2 in the kitchen, living room, and bedrooms of each household over one year. In addition, in one of the houses, velocity and globe temperatures were measured for multiple summer and autumn seasons. Results of our present study indicated that outdoor temperature is an important influencing factor of indoor thermal environment and indoor RH is a good indicator of residents’ lifestyle. Our findings highlighted the need for temperature management in summer, RH management in winter, and kitchen thermal environment management during summer and tropical nights. This study suggested that IoT devices are a potential approach for evaluating personal exposure to indoor thermal environmental risks. In addition, long-term monitoring and analysis is an efficient approach for analyzing complex indoor thermal environments and is a viable method for application in healthcare.

Download Full-text