Correlating indoor and outdoor temperature and humidity in a sample of buildings in tropical climates

Indoor Air ◽  
2021 ◽  
Author(s):  
Jin Pan ◽  
Julian Tang ◽  
Miguela Caniza ◽  
Jean‐Michel Heraud ◽  
Evelyn Koay ◽  
...  
Keyword(s):  
Outdoor Temperature ◽  
Temperature And Humidity ◽  
Tropical Climates ◽  
Indoor And Outdoor

Investigation on Thermal Environment in Railway Station Waiting Room

2014 ◽  
Vol 955-959 ◽  
pp. 4100-4103
Author(s):  
Yu Hui Di ◽  
Zi Long Xu ◽  
Chun Yang Jiang
Keyword(s):  
Thermal Comfort ◽  
Field Measurement ◽  
Thermal Environment ◽  
Outdoor Temperature ◽  
Waiting Room ◽  
Railway Station ◽  
Temperature And Humidity ◽  
Indoor And Outdoor

Takes a field measurement in traffic statistics, indoor and outdoor temperature and humidity, analyzes the thermal environment of the railway station waiting room of Xi’an. Investigates the thermal comfort status using ASHRAE seven sensation scales by questionnaires, survey the people’s satisfaction to the environment of waiting room.

The relationship between indoor and outdoor temperature and humidity in two types of residence

2014 ◽  
Vol 13 (4) ◽  
pp. 326-335 ◽  
Author(s):  
Jiseon Yeom ◽  
◽  
Daeyeop Lee ◽  
Kiyoung Lee ◽  
John D. Spengler ◽  
...  
Keyword(s):  
Outdoor Temperature ◽  
Temperature And Humidity ◽  
The Relationship ◽  
Indoor And Outdoor

scholarly journals On the Spatial Patterns of Urban Thermal Conditions Using Indoor and Outdoor Temperatures

2021 ◽  
Vol 13 (4) ◽  
pp. 640
Author(s):  
Sadroddin Alavipanah ◽  
Dagmar Haase ◽  
Mohsen Makki ◽  
Mir Muhammad Nizamani ◽  
Salman Qureshi
Keyword(s):  
Heat Stress ◽  
Air Temperature ◽  
Temperature Data ◽  
Cold Spot ◽  
Temperature Pattern ◽  
Outdoor Temperature ◽  
Residential Units ◽  
Urban Settlements ◽  
The Impact ◽  
Indoor And Outdoor

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.

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

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.

scholarly journals Efficiency of the chimney effect controlling radon levels indoor

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.

scholarly journals Error Analysis of QUB Method in Non-Ideal Conditions during the Experiment

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3398
Author(s):  
Naveed Ahmad ◽  
Christian Ghiaus ◽  
Moomal Qureshi
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Temperature Difference ◽  
Temperature Response ◽  
Weather Conditions ◽  
Outdoor Temperature ◽  
Overall Heat Transfer Coefficient ◽  
Median Error ◽  
Indoor And Outdoor

Overall heat transfer coefficient, also known as the intrinsic performance measurement of the building, determines the amount of heat lost by a building due to temperature difference between indoor and outdoor. QUB (Quick U-value of Buildings) is a short-term method for measuring the overall heat transfer coefficient of buildings. The test involves heating and cooling the house with a power step and measuring the indoor temperature response in a single night. Ideally, the outdoor temperature during QUB experiment should remain constant. To compare the influence of variable outdoor temperature, the QUB experiments are simulated on a well-calibrated model with real weather conditions. The experiments at varying outdoor temperature and constant outdoor temperature during the night show that the results in both conditions are nearly similar. A ±2 °C increase or decrease in the outdoor temperature during the QUB experiment can change the results in the measured overall heat transfer coefficient by ±5%. QUB experiments simulated during the months of winter show that the majority of results are ±15% of the steady-state overall heat transfer coefficient. The QUB results during the months of summer show relatively large variation. The large errors coincide with the small temperature difference between indoor and outdoor temperatures before the start of QUB experiment. The median error of multiple QUB experiments during summer can be reduced by increasing the setpoint temperature before the start of QUB experiment.

scholarly journals Relation between some climate parameters inside and outside the stable in the course of the year

2009 ◽  
Vol 57 (4) ◽  
pp. 125-132 ◽  
Author(s):  
Lucie Walterová ◽  
Lenka Šarovská ◽  
Daniel Falta ◽  
Gustav Chládek
Keyword(s):  
Relative Humidity ◽  
Outdoor Temperature ◽  
Climate Parameters ◽  
Temperature Humidity Index ◽  
Humidity Index ◽  
Autumn And Winter ◽  
Daily Relative Humidity ◽  
Indoor And Outdoor

The objective of the present study was to evaluate the relation between some climate parameters inside and outside the stable in the course of the year. Investigations were carried out from 1 July 2007 to 30 June 2008 at the School Farm in Žabčice. We monitored the following micro-climate pa­ra­me­ters: temperature (°C), relative humidity (%) and the temperature-humidity index (THI) inside and outside the stable. We used the statistical programme UNISTAT version 5.1.11 to calculate the average monthly temperatures, relative humidity and the THI inside and outside the stable.Measurements carried out throughout the whole year revealed that the average daily outdoor temperature was always lower than the temperature monitored inside the stable. The differences between the outdoor and indoor temperatures were more marked in winter; in summer the differences were considerably lower. The coefficient correlations confirmed this finding; the temperatures were the highest in July and the lowest in autumn and winter. The same results and tendencies were monitored in terms of the average daily THI values. Much like the temperatures also the differences in high average daily values of relative humidity between the outside and inside environment of the stable were lower. Since the relative humidity was higher in winter than in summer the differences between the indoor and outdoor stable values were more marked in summer than in winter. In contrast to the temperature and THI, in one half of the cases the average daily relative humidity was higher outside the stable than inside and vice versa.

Effect of pretest temperature on aerosol penetration and clearance in donkeys

1976 ◽  
Vol 41 (6) ◽  
pp. 920-924 ◽  
Author(s):  
D. E. Bohning ◽  
R. E. Albert ◽  
M. Lippmann ◽  
V. R. Cohen
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Aerosol Deposition ◽  
Multiple Linear Regression Analysis ◽  
Outdoor Temperature ◽  
Deposition Pattern ◽  
Particle Penetration ◽  
Temperature And Humidity ◽  
Humidity Dependence

Pretest temperature and humidity were correlated with tracheobronchial particle penetration and clearance data from donkeys housed in unheated outdoor facilities and tested after spending 1–2 h in a temperature- andhumidity-controlled laboratory. The animals inhaled an inert insoluble radioisotope-labeled monodisperse aerosol for several minutes. Its retention was monitored continuously for 3 h by external gamma detection. Aerosol deposition pattern and bronchial clearance were linearly correlated with pretestoutdoor temperature which ranged from -10 to 30 degrees C. The fraction depositing in the unciliated regions of the lung decreased 0.6% per degrees C drop in outdoor temperature. Overall bronchial transport decreased at least1.5%per degrees C decrease. Multiple linear regression analysis and correction for the positive correlation between temperature and humidity left no significant residual humidity dependence. Acclimatization of the animals in the laboratory for 6 h before testing significantly reduced these effects.

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