The Relationship Between Indoor and Outdoor Temperature in Two Types Of Residence

The changing climate has introduced new and unique challenges and threats to humans and their environment. Urban dwellers in particular have suffered from increased levels of heat stress, and the situation is predicted to continue to worsen in the future. Attention toward urban climate change adaptation has increased more than ever before, but previous studies have focused on indoor and outdoor temperature patterns separately. The objective of this research is to assess the indoor and outdoor temperature patterns of different urban settlements. Remote sensing data, together with air temperature data collected with temperature data loggers, were used to analyze land surface temperature (outdoor temperature) and air temperature (indoor temperature). A hot and cold spot analysis was performed to identify the statistically significant clusters of high and low temperature data. The results showed a distinct temperature pattern across different residential units. Districts with dense urban settlements show a warmer outdoor temperature than do more sparsely developed districts. Dense urban settlements show cooler indoor temperatures during the day and night, while newly built districts show cooler outdoor temperatures during the warm season. Understanding indoor and outdoor temperature patterns simultaneously could help to better identify districts that are vulnerable to heat stress in each city. Recognizing vulnerable districts could minimize the impact of heat stress on inhabitants.

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Analysis of Convergence Conditions for the Variance of Indoor and Outdoor Temperature Differences of In-site Thermal Resistance by Average Method

Journal of The Korean Society of Living Environmental System ◽

10.21086/ksles.2021.2.28.1.95 ◽

2021 ◽

Vol 28 (1) ◽

pp. 95-102

Author(s):

Ji-Hoon Moon ◽

Ye-Ji Lee ◽

Myeong-Jin Ko ◽

Doo-Sung Choi ◽

Yong-Shik Kim

Keyword(s):

Thermal Resistance ◽

Average Method ◽

Outdoor Temperature ◽

Convergence Conditions ◽

Indoor And Outdoor

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Study on IBS Cooling Panel Wall System with Difference Types of Cooling Mediums

International Journal of Sustainable Construction Engineering Technology ◽

10.30880/ijscet.2020.11.02.011 ◽

2020 ◽

Vol 11 (2) ◽

Author(s):

Eny Nor Syahira Mohamad Hashim ◽

◽

Norhafizah Salleh ◽

Noor Azlina Abdul Hamid ◽

◽

...

Keyword(s):

Relative Humidity ◽

Air Conditioning ◽

Ventilation System ◽

Target Strength ◽

Outdoor Temperature ◽

Design Concepts ◽

Building Ventilation ◽

American Society ◽

Wall System ◽

Indoor And Outdoor

This paper proposes a cooling house system that can promote thermal comfort in buildings without air-conditioning. The cooling panel wall forms a part of an Integrated Building System (IBS), and is essentially made of tubes filled with either water or glycerin as the coolant. Target strength for the panel wall was designed based on the Malaysian Standard (MS) while the building ventilation system followed the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) standard. The results are reported based on indoor and outdoor temperature difference together with relative humidity to identify the best performing house model and also coolant. The outcome of this research is expected to add value to design concepts with a better promotion of air flow and circulation in the building, without over-usage of natural resources and higher building cost to achieve the same objective.

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Comet Test in Saliva Leukocytes of Pre-School Children Exposed to Air Pollution in North Italy: The Respira Study

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17093276 ◽

2020 ◽

Vol 17 (9) ◽

pp. 3276 ◽

Cited By ~ 1

Author(s):

Claudia Zani ◽

Elisabetta Ceretti ◽

Ilaria Zerbini ◽

Gaia Claudia Viviana Viola ◽

Francesco Donato ◽

...

Keyword(s):

Air Pollution ◽

Dna Damage ◽

School Children ◽

Urban Areas ◽

Outdoor Exposure ◽

Airborne Pollutants ◽

Exposure Variable ◽

Two Measures ◽

The Relationship ◽

Indoor And Outdoor

Air pollution is a well-known problem for human health, especially for children living in highly polluted urban areas. This study aimed to assess the relationship between airborne pollutants concentration and biomarkers of DNA damage in the buccal mucosa cells of pre-school children. DNA damage was investigated with comet test in saliva leukocytes taken from sputum of 3- to 6-year-old children living in Brescia, Northern Italy, collected during two consecutive winter seasons (2012–2013). The daily levels of PM10, PM2.5, NO2, CO, SO2, benzene and O3 in urban air were collected for the whole period. A questionnaire filled in by the children’s parents was used to evaluate indoor and outdoor exposure. DNA damage in saliva leukocytes was evaluated in 152 children and the means of tail intensity and visual score as DNA damage were 6.2 ± 4.3 and 182.1 ± 30.9, respectively. No demographic and indoor or outdoor exposure variable was associated with the two measures of DNA damage. No significant association between air pollution and DNA damage in children’s buccal leukocytes was found. In this study, the comet assay does not appear to be a valuable biomarker to detect DNA damage in children exposed to high levels of air pollutants, such as PM10, PM2.5 and NO2.

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Efficiency of the chimney effect controlling radon levels indoor

MATEC Web of Conferences ◽

10.1051/matecconf/201928202029 ◽

2019 ◽

Vol 282 ◽

pp. 02029

Author(s):

Britt Haker Høegh ◽

Torben Valdbjørn Rasmussen

Keyword(s):

Case Studies ◽

Driving Force ◽

Indoor Radon ◽

Single Family ◽

Outdoor Temperature ◽

Radon Level ◽

Suction System ◽

Thermal Buoyancy ◽

Chimney Effect ◽

Indoor And Outdoor

According to the WHO the radioactive gas radon must be controlled indoors. E.g. by naturally driven suction systems based on thermal buoyancy, also denoted the chimney effect, which exploits the difference of indoor- and outdoor temperature to lower radon levels indoor. This paper presents four case studies showing that the efficiency of such systems to control radon level indoors varies, as the outdoor temperature varies throughout the year. The chimney effect was the driving force in the four single-family houses used as case studies. In two cases it was used to increase the indoor air change rate to dilute the radon concentration indoor, in one case it was used to drive a suction system under the ground slab to prevent radon from infiltrating through the ground slab, and in one case both techniques were used in combination. Measurements showed a correlation between a low radon level indoors and an increased difference between the indoor- and outdoor temperature, with the highest temperature indoor. Likely, the temperature difference can provide the needed suction in such systems. Without this driving force – out of the heating season – an increase of the indoor radon level was seen to occur. The needed suction to lower the radon level indoor did not occur in all cases. However, the efficiency of the system was seen to vary throughout the year, and was limited in periods with little difference between the indoor- and the outdoor temperature. Such needs to be taken into account, when the effect of naturally driven suction systems to reduce the radon level indoor are evaluated.

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