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Journal articles on the topic 'Air humidity effect'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Yanchukovsky, Valery, Marina Kalyuzhnaya, and Rashit Hisamov. "Intensity of the neutron component of cosmic rays and air humidity." Solar-Terrestrial Physics 10, no. 1 (2024): 34–39. http://dx.doi.org/10.12737/stp-101202405.

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Neutron monitor data is currently corrected only for the barometric effect. We cannot, however, exclude that changes in air humidity affect the intensity of the cosmic-ray neutron component recorded by neutron monitors. In this regard, we have carried out continuous measurements of air humidity and temperature when observing variations in the cosmic ray intensity with a neutron monitor in Novosibirsk. Analysis of the results of observations of meteorological parameters and cosmic ray intensity in Novosibirsk, as well as data from the global network of neutron monitors, made it possible to iden

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2

Rouadi, Philip, Fuad M. Baroody, David Abbott, Edward Naureckas, Julian Solway, and Robert M. Naclerio. "A technique to measure the ability of the human nose to warm and humidify air." Journal of Applied Physiology 87, no. 1 (1999): 400–406. http://dx.doi.org/10.1152/jappl.1999.87.1.400.

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To assess the ability of the nose to warm and humidify inhaled air, we developed a nasopharyngeal probe and measured the temperature and humidity of air exiting the nasal cavity. We delivered cold, dry air (19–1°C, <10% relative humidity) or hot, humid air (37°C, >90% relative humidity) to the nose via a nasal mask at flow rates of 5, 10, and 20 l/min. We used a water gradient across the nose (water content in nasopharynx minus water content of delivered air) to assess nasal function. We studied the characteristics of nasal air conditioning in 22 asymptomatic, seasonally allergic subject

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3

Krivosheev, Vladimir Vasilievich, Artem Igorevich Stolyarov, and Aleksandr Aleksandrovich Semenov. "Absolute humidity of atmospheric air and COVID-19." Sanitarnyj vrač (Sanitary Doctor), no. 10 (August 7, 2021): 8–24. http://dx.doi.org/10.33920/med-08-2110-01.

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Today COVID-19 is number one global point of focus. Therefore, study of the effects of environmental conditions, in which exist pandemic subjects — people and viruses, on pandemic dynamics and results is extremely important. The authors made a correlation analysis of dependence between incidence/mortality of population and absolute and relative humidity in 73 countries and regions on different continents of the Earth. The methodology developed defines how and in what periods of time the environmental factors effect on human incidence and mortality, how strongly particular atmospheric parameter

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4

Nduru, Fandi Bachtiar, and Nur Yanu Nugroho. "Effect of Air Humidity in MIG Welded Joints on Tensile Strength and Impact Strength of Aluminum 5052." BERKALA SAINSTEK 11, no. 2 (2023): 129. http://dx.doi.org/10.19184/bst.v11i2.37546.

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In the shipbuilding process, delays often occur. In general, to speed up a ship's construction, overtime is carried out by workers until nighttime. Environmental conditions in a welding process, especially air humidity, strongly affect the properties of welded joints. The formation of hydrogen in the air caused by an inappropriate environment can cause defects in welded joints, especially porosity defects. Variations of welding environmental conditions used, are welding in the morning at 84% air humidity, daytime welding at 53% air humidity, and nighttime welding at 77% air humidity. This stud

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5

Fahruddin, Arasy, Prantasi Harmi Tjahjanti, and Mulyadi. "Effect of Thermoelectric Power and Air Flow on Air Temperature and Relative Humidity." Journal of Energy, Mechanical, Material, and Manufacturing Engineering 7, no. 1 (2022): 21–26. http://dx.doi.org/10.22219/jemmme.v7i1.21761.

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A dehumidifier is a device for drying air by releasing moisture. A dehumidifier with a thermoelectric cooler has the advantage of being more compact and has the potential to be combined with an air heater. This study aimed to determine the effect of thermoelectric power and airflow on air temperature and relative humidity. The research method uses direct experiments with six pieces of thermoelectric as a coolant. The data taken are the cooler surface temperature, the air temperature that is dried, and the humidity of the air. The test results show that the dried air temperature can reach 25.6o

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Tkachenko, Irina, Sergey Tkachenko, and Viktor Dedkov. "How diets and the environment influence on the weight of Roman snail in captivity." E3S Web of Conferences 222 (2020): 02046. http://dx.doi.org/10.1051/e3sconf/202022202046.

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This article presents the results of a study into the influence of the diet, air temperature and relative air humidity, and soil temperature on the average weight of Helix pomatia in captivity. It was shown that vegetables included in the mixed leaf-vegetable diet mitigated the effect of a high air temperature and a low relative humidity. It was established that the air temperature and relative humidity had opposite effects on weight gain in Helix pomatia. The increase in temperature predetermined the weight loss. Despite the high temperature, a humidity of over 75% caused all the molluscs gai

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7

Tukkee, Ali M., Hussain H. Al-Kayiem, and Syed I. U. Gilani. "Humidity Effect on the Simulation Accuracy of Solar Vortex Engine Performance." Journal of Solar Energy Research Updates 8 (October 31, 2021): 118–29. http://dx.doi.org/10.31875/2410-2199.2021.08.10.

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In this study, a validated computational simulation is presented to investigate the effect of humidity on the performance prediction of the solar vortex engine system. Data from an experimental model are used to validate the CFD simulation. Three humidity cases are considered: dry air, 40% and 80% humid air. An expansion process with heat addition is taking place inside the vortex generator. When the vortex field continues outside the system, a compression process with heat rejection occurs, eventually bringing the air vortex to be thermal and mechanical equilibrium with the surrounding atmosp

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8

Xi, Wang, Santu Luo, Dingxin Liu, et al. "The effect of humidity on the discharge mode transition of air discharge plasma." Physics of Plasmas 29, no. 9 (2022): 090701. http://dx.doi.org/10.1063/5.0107803.

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Cold atmospheric plasma in air commonly operates in the O3 mode and NO x mode, which easily interconvert through a transition mode, depending on discharge conditions. Given that the humidity varies considerably in different weather, it is important to elucidate the effect of humidity on the discharge mode transition, but few studies have been reported thus far. In this study, air plasmas were generated by a surface dielectric barrier discharge with different discharge powers of 6, 9, and 12 W, and the relative humidity of air was controlled at 1.5% (dry air), 40%, or 80% for a comparative stud

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9

Shi, Weifang, Nan Wang, Aixuan Xin, Linglan Liu, Jiaqi Hou, and Yirui Zhang. "Quantifying the Independent Influences of Land Cover and Humidity on Microscale Urban Air Temperature Variation in Hot Summer: Methods of Path Analysis and Genetic SVR." Atmosphere 11, no. 12 (2020): 1377. http://dx.doi.org/10.3390/atmos11121377.

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Mitigating high air temperatures and heat waves is vital for decreasing air pollution and protecting public health. To improve understanding of microscale urban air temperature variation, this paper performed measurements of air temperature and relative humidity in a field of Wuhan City in the afternoon of hot summer days, and used path analysis and genetic support vector regression (SVR) to quantify the independent influences of land cover and humidity on air temperature variation. The path analysis shows that most effect of the land cover is mediated through relative humidity difference, mor

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10

Čákyová, K., and F. Vranay. "Effect of water wall prototype on air humidity." IOP Conference Series: Materials Science and Engineering 566 (August 9, 2019): 012006. http://dx.doi.org/10.1088/1757-899x/566/1/012006.

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11

Qi, Di, Chuangyao Zhao, Shixiong Li, Ran Chen, and Angui Li. "Numerical Assessment of Earth to Air Heat Exchanger with Variable Humidity Conditions in Greenhouses." Energies 14, no. 5 (2021): 1368. http://dx.doi.org/10.3390/en14051368.

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Earth to air heat exchangers are widely utilized to cool or heat passive buildings for energy savings. They often need to deal with high humidity air conditions, especially in the greenhouse due to plant transpiration, and the condensation phenomenon is frequently observed during the cooling process. To evaluate the effect of humidity and condensation on thermal performance, a three dimensional computational fluid dynamic (3D-CFD) model was developed. The distribution of relative humidity in each pipe was investigated, and the impact of inlet air relative humidity on the integrated performance

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12

ZHU, Chunyang, Peng JI, and Shuhua LI. "EFFECTS OF URBAN GREEN BELTS ON THE AIR TEMPERATURE, HUMIDITY AND AIR QUALITY." Journal of Environmental Engineering and Landscape Management 25, no. 1 (2017): 39–55. http://dx.doi.org/10.3846/16486897.2016.1194276.

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As urbanization increases, designing green space that offers ecological benefits is an increasingly important goal of urban planning. As a linear green space in an urban environment, green belts lower air temperature, increase relative humidity, and improve air quality. To quantify the ecological effects of urban green belts and to identify a critical width for effective urban green belts, we analysed the width of urban green belts in terms of their effects on air temperature (T), relative humidity (RH), concentration of negative air ions (NAI) and bacteria rate (BR). The air T, RH and NAI fro

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13

Roșca, Eugen, Florin Ruscă, Oana Dinu, et al. "A Moderation effect of atmospheric conditions on PM_2.5 traffic related concentration." Romanian Journal of Transport Infrastructure 12, no. 1 (2023): 1–17. http://dx.doi.org/10.2478/rjti-2023-0007.

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Abstract The paper highlights the contribution of the road traffic to PM2.5 air pollution, taking in consideration the atmospheric parameters. But, despite other studies, temperature and relative humidity are considered as moderating variable. The concentration of particulate matter is also influenced by local geography, urban structure, and streets shape. The case study was done in Bucharest, in an open area. The PM2.5 air concentration time series is proved stationary, an autoregressive model with two lags being tested. While the main effects of road traffic and humidity are significant, tem

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14

Morner, Svein O., and Sanford A. Klein. "Experimental Evaluation of the Dynamic Behavior of an Air-Breathing Fuel Cell Stack." Journal of Solar Energy Engineering 123, no. 3 (2001): 225–31. http://dx.doi.org/10.1115/1.1385202.

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The performance of an air breathing proton exchange membrane (PEM) fuel cell stack has been experimentally measured to investigate the steady-state and transient effects of temperature, humidity and air flowrate. The results show that hydrogen leaks to the cathode through the membrane causing internal heating of the fuel cell. The leakage rate is found to be linearly dependent on the pressure difference between the hydrogen side and air side which is at atmospheric pressure. Temperature was found to not have a significant effect on the PEM performance, except through its indirect effect on hum

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15

Zhang, Yongli. "Seasonal Disparity in the Effect of Meteorological Conditions on Air Quality in China Based on Artificial Intelligence." Atmosphere 12, no. 12 (2021): 1670. http://dx.doi.org/10.3390/atmos12121670.

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Air contamination is identified with individuals’ wellbeing and furthermore affects the sustainable development of economy and society. This paper gathered the time series data of seven meteorological conditions variables of Beijing city from 1 November 2013 to 31 October 2017 and utilized the generalized regression neural network optimized by the particle swarm optimization algorithm (PSO-GRNN) to explore seasonal disparity in the impacts of mean atmospheric humidity, maximum wind velocity, insolation duration, mean wind velocity and rain precipitation on air quality index (AQI). The results

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16

Chen, Zhenxiao, Derek Ingham, Mohammed Ismail, Lin Ma, Kevin J. Hughes, and Mohamed Pourkashanian. "Effects of hydrogen relative humidity on the performance of an air-breathing PEM fuel cell." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 4 (2019): 2077–97. http://dx.doi.org/10.1108/hff-11-2018-0674.

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Purpose The purpose of this paper is to investigate the effects of hydrogen humidity on the performance of air-breathing proton exchange membrane (PEM) fuel cells. Design/methodology/approach An efficient mathematical model for air-breathing PEM fuel cells has been built in MATLAB. The sensitivity of the fuel cell performance to the heat transfer coefficient is investigated first. The effect of hydrogen humidity is also studied. In addition, under different hydrogen humidities, the most appropriate thickness of the gas diffusion layer (GDL) is investigated. Findings The heat transfer coefficie

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17

Kyogoku, Sae, and Hideki Takebayashi. "Experimental Verification of Mist Cooling Effect in Front of Air-Conditioning Condenser Unit, Open Space, and Bus Stop." Atmosphere 14, no. 1 (2023): 177. http://dx.doi.org/10.3390/atmos14010177.

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Mist spraying is a technique for locally lowering air temperature by spraying fine mist into the air and using the latent heat of evaporation immediately after spraying. This study focuses on the conditions under which mist spraying contributes to the increase in sensible heat release from the human body, using the ratio of air temperature decrease and humidity increase in the space where mist is sprayed. From the measurement results in front of the air-conditioning condenser unit, humidity increased by about 10 g/kg(DA), while air temperature decreased by about 10 °C. From the measurement res

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18

Sabudin, Sulastri, Mohd Zairul Hakimi Remlee, and Mohd Faizal Mohideen Batcha. "Effect of Relative Humidity on Drying Kinetics of Agricultural Products." Applied Mechanics and Materials 699 (November 2014): 257–62. http://dx.doi.org/10.4028/www.scientific.net/amm.699.257.

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The demand for food has been ever increasing in proportion with the growing human population. This includes agricultural products including fruits. Hence, food preservation for extended usage through drying is gaining importance. This study reports the drying behavior of several agricultural products, namely sweet potato, carrot, ginger, turmeric, passion fruit and its rind. Focus has been given to the effect of relative humidity on drying for these products at room temperature. Experiments were carried out at 27°C by varying relative humidity at 40%, 60% and 80%. It was found that the relativ

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19

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 (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) a

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20

Lee, C. H., and J. D. Ramsey. "The Globe Thermometer Response under Varying Thermal Components." Proceedings of the Human Factors Society Annual Meeting 31, no. 12 (1987): 1341–44. http://dx.doi.org/10.1177/154193128703101209.

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This study investigates the effect of air velocity and other thermal components on the globe thermometer response. An experiment was conducted in an environmental chamber in order to measure globe temperatures under varying air velocity, relative humidity and air temperature. This study was performed under three different radiant heat levels. It was found that air velocity has a significant effect on the globe thermometer response. This effect is quantified in this study. Neither air temperature nor relative humidity was found to have a significant effect on globe thermometer response.

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21

Platonov, Vadim, Marina Rumyantseva, Nikolay Khmelevsky, and Alexander Gaskov. "Electrospun ZnO/Pd Nanofibers: CO Sensing and Humidity Effect." Sensors 20, no. 24 (2020): 7333. http://dx.doi.org/10.3390/s20247333.

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Variable air humidity affects the characteristics of semiconductor metal oxides, which complicates the reliable and reproducible determination of CO content in ambient air by resistive gas sensors. In this work, we determined the sensor properties of electrospun ZnO and ZnO/Pd nanofibers in the detection of CO in dry and humid air, and investigated the sensing mechanism. The microstructure of the samples, palladium content, and oxidation state, type, and concentration of surface groups were characterized using complementary techniques: X-ray fluorescent spectroscopy, XRD, high-resolution trans

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22

Yanchukovsky, Valery, Marina Kalyuzhnaya, and Rashit Hisamov. "Intensity of the neutron component of cosmic rays and air humidity." Solnechno-Zemnaya Fizika 10, no. 1 (2024): 37–43. http://dx.doi.org/10.12737/szf-101202405.

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Neutron monitor data is currently corrected only for the barometric effect. We cannot, however, exclude that changes in air humidity affect the intensity of the cosmic-ray neutron component recorded by neutron monitors. In this regard, we have carried out continuous measurements of air humidity and temperature when observing variations in the cosmic ray intensity with a neutron monitor in Novosibirsk. Analysis of the results of observations of meteorological parameters and cosmic ray intensity in Novosibirsk, as well as data from the global network of neutron monitors, made it possible to iden

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23

Yue, Weipeng, Yu Xue, and Yan Liu. "High Humidity Aerodynamic Effects Study on Offshore Wind Turbine Airfoil/Blade Performance through CFD Analysis." International Journal of Rotating Machinery 2017 (2017): 1–15. http://dx.doi.org/10.1155/2017/7570519.

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Damp air with high humidity combined with foggy, rainy weather, and icing in winter weather often is found to cause turbine performance degradation, and it is more concerned with offshore wind farm development. To address and understand the high humidity effects on wind turbine performance, our study has been conducted with spread sheet analysis on damp air properties investigation for air density and viscosity; then CFD modeling study using Fluent was carried out on airfoil and blade aerodynamic performance effects due to water vapor partial pressure of mixing flow and water condensation arou

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24

Panjaitan, Christin Erniati, Daniel Jaya Saputra, Bangun D. Hasudungan, Sri Wahyuni Tarigan, and Janter Napitupulu. "Air Humidity Measurement Through Solar Panel." Journal of Electronics Technology Exploration 2, no. 1 (2024): 6–11. http://dx.doi.org/10.52465/joetex.v2i1.335.

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In this work, we will examine the placement of solar panels at certain heights to obtain optimal efficiency. To prove the effect of altitude and humidity, the authors conducted tests in areas with different altitudes and different temperatures, namely in the areas of Medan and Berastagi cities, where the city of Medan is located at an altitude of 2.5-7.5 meters above sea level, and the city area of Berastagi is higher, namely at an altitude of 1220 meters above sea level. The distance between the two areas is around 70 km and can be reached in approximately 2 hours of travel. With different al

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25

Chen, A. G., Daniel J. Maloney, and William H. Day. "Humid Air NOx Reduction Effect on Liquid Fuel Combustion." Journal of Engineering for Gas Turbines and Power 126, no. 1 (2004): 69–74. http://dx.doi.org/10.1115/1.1615255.

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An experimental investigation was carried out at DOE NETL on the humid air combustion process using liquid fuel to determine the effects of humidity on pollutant emissions and flame stability. Tests were conducted at pressures of up to 100 psia (690 kPa), and a typical inlet air temperature of 860°F (733 K). The emissions and RMS pressures were documented for a relatively wide range of flame temperature from 2440-3090°F (1610–1970 K) with and without added humidity. The results show more than 90% reduction of NOx through 10% humidity addition to the compressed air compared with the dry case at

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26

Ginting, Daria BR, Imam Santosa, and Sri Indra Trigunarso. "Pengaruh Suhu, Kelembaban Dan Kecepatan Angin Air Conditioner (AC) Terhadap Jumlah Angka Kuman Udara Ruangan." Jurnal Analis Kesehatan 11, no. 1 (2022): 44. http://dx.doi.org/10.26630/jak.v11i1.3183.

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<p>A room that uses an Air Conditioner (AC) is one of the breeding grounds for air microorganisms, therefore it is necessary to have a number of germs in the room so as not to cause airborne disease. The purpose of this study was to determine the effect of temperature, humidity, and wind speed on the number of germs in an air-conditioned room. This type of research is an experimental consisting of 3 dependent variables and 1 independent variable with a cross-sectional research design. Laboratory room air samples were taken by the BRAB method, 12 times in a row. Sampling of the air using

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27

Winardi. "The Effect of Temperature and Humidity Against Lead (Pb) Concentration in the Air of Pontianak City." JURNAL BORNEO AKCAYA 1, no. 1 (2014): 16–25. http://dx.doi.org/10.51266/borneoakcaya.v1i1.5.

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The existence of Lead (Pb) pollutants in the air that generated by motor vehicle exhaust emissions determined by how large the influence of temperature and humidity tend to change according to time and weather influences. Temperature and humidity Changes in the earth's surface due to solar radiation in the morning-afternoon-evening will give change in the concentration of Pb in the air. With the days variation will be seen the influence of weather that gives the difference in temperature and humidity of each day so that the concentration of Pb in air pollutants, will be varied. This research l

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28

Hollands, Jutta, and Azra Korjenic. "Indirect Economic Effects of Vertical Indoor Green in the Context of Reduced Sick Leave in Offices." Sustainability 13, no. 4 (2021): 2256. http://dx.doi.org/10.3390/su13042256.

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Low indoor humidity has been shown to influence the transmission of respiratory diseases via air. A certain proportion of sick leave in offices is therefore attributable to dryness of air. An improvement in these conditions thus means a reduction in sick leave, which is accompanied by cost savings for companies. Vertical indoor greening has a verifiable positive effect on air humidity, especially in winter months. In this article, the correlation between improved air humidity in greened rooms and reduction of sick leave due to improved air humidity was described. The resulting indirect economi

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Jo, Su-Young, Seong-Yong Cheon, Beom-Jun Kim, Taek-Don Kwon, and Jae-Weon Jeong. "Humidification Performance Evaluation of hollow-fiber membrane-based humidifier for air-conditioning." E3S Web of Conferences 396 (2023): 01099. http://dx.doi.org/10.1051/e3sconf/202339601099.

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Indoor viral and fungal activity is affected by the concentration of moisture in the air. Since the concentration of viruses and fungi in the air directly affects the human body, it is necessary to maintain a specific humidity range through the air-conditioning system. The optimum humidity in the building is 40-60%, and it needs to be maintained regardless of the season. In winter, a separate humidification system is required to adjust the indoor humidity due to the dry outside air. However, since the conventional humidification system injects water or steam directly into the air, various prob

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Wei, Xin Dong, Xue Feng Yun, and You Ke Wang. "Effect of Air Temperature and Humidity near the Ground under Moisture Conserving Irrigation of Straw Mulch." Applied Mechanics and Materials 71-78 (July 2011): 3079–86. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.3079.

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Based on the monitoring and analysis of field experiments, used the advanced auto-monitoring instruments, we studied the effect of air temperature and humidity near the ground under moisture conserving irrigation(MCI) of Straw Mulch in maize field. The result showed that the air temperature and humidity near the ground could be decreased and increased separately. The relationship between the air temperature and humidity near the ground can be expressed by Index equation. The view of this study is to provide a theoretical basis for promoting the technology of MCI of straw mulch.

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Gao, Zhen, Qiang Wang, Haowei Hu, Guotao Zhu, Bingzhan Ren, and Siwei Zhang. "Effect of Air Supply Mode on Indoor Air Quality Using Fresh Air System." MATEC Web of Conferences 175 (2018): 04014. http://dx.doi.org/10.1051/matecconf/201817504014.

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The different ways of fresh air into the indoor, different forms of organization, will affect the indoor comfort. Meanwhile, it can affect the quality of indoor air. The test of the fresh air system mainly involves the indoor temperature and humidity with and without return air. Based on various air organization conditions, the best scheme is put forward. In this work, the influence of the air inlet location on the indoor air quality is studied, and the indoor thermal environment of the room is optimized under the condition of the fresh air supplied.

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Ftaiti, Foued, Monem Jemni, Asma Kacem, et al. "Effect of hyperthermia and physical activity on circulating growth hormone." Applied Physiology, Nutrition, and Metabolism 33, no. 5 (2008): 880–87. http://dx.doi.org/10.1139/h08-073.

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The aim of this study was to differentiate the effects of hyperthermia and physical activity on circulating growth hormone (GH) secretion. Nine healthy volunteer adults performed two 40 min exercise trials and two 50 min passive standing trials. The exercise was performed in either thermo-neutral (N-Ex: air temperature 18 °C, air humidity 40%, and wet bulb globe temperature (WBGT) 17.7 °C) or hot environmental conditions (H-Ex: air temperature 33 °C, air humidity 30%, and WBGT 34.6 °C). The passive exposure trials were also performed in either a comfortable (N-P: air temperature 18 °C, air hum

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Ismail, Ahmad Rasdan, Abu Bakar Rosli, and Norfadzilah Jusoh. "Experimental Study of Temperature Effect on Human Skin: Discussion of Methodology." Advanced Engineering Forum 10 (December 2013): 71–76. http://dx.doi.org/10.4028/www.scientific.net/aef.10.71.

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This paper present the discussion of methods used in experimental studies of thermal comfort that only focus on the effect skin temperature of human. The study was conducted human subject tests in a controlled environment chamber for cooling conditions. This study was measure in the test climate chamber at Universiti Malaysia Pahang. Three broad methodology categories are compared which are experiments in which subjects have control of air temperature, relative humidity or neither. The local supply air temperatures were at 19, 25 and 32 °C while relative humidity was at 40, 55 and 70%. Togethe

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Karim, Yasmin G., M. Khalid Ijaz, Syed A. Sattar, and C. Margaret Johnson-Lussenburg. "Effect of relative humidity on the airborne survival of rhinovirus-14." Canadian Journal of Microbiology 31, no. 11 (1985): 1058–61. http://dx.doi.org/10.1139/m85-199.

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Rhinovirus-14, suspended in tryptose phosphate broth supplemented with uranine (physical tracer) and an antifoam, was aerosolized by use of a Collison nebulizer. The aerosols were held in a rotating drum with the relative humidity at either the low (30 ± 5%), medium (50 ± 5%), or high (80 ± 5%) level at 20 ± 1 °C. An all-glass impinger was used to recover the virus from the air in the drum, with the first air sample being collected after a 15-min period of aerosol stabilization. Subsequent air samples were withdrawn at 2, 4, 8, and 14 h after stabilization of the aerosol. At the low and medium

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Zhang, Xin, Junjie Liu, Xilei Dai, and Jingjing Pei. "Experimental Analysis of Residential Ventilation and Dehumidification Strategies in Chongqing." E3S Web of Conferences 111 (2019): 01004. http://dx.doi.org/10.1051/e3sconf/201911101004.

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As a typical representative city of China’s hot and humid climate zone, Chongqing has an average annual relative humidity of 70% - 80%. Continuous online monitoring of indoor air quality (IAQ) were conducted in more than 20 residents of Chongqing city. It was found that the apartments in the area had excessive indoor absolute humidity in summer (far exceed the ASHRAE recommended comfort limit—12g/kg) and excessive indoor relative humidity in winter and transitional seasons. It is necessary to dehumidify the outdoor intake air during the summer and decrease the indoor related humidity during th

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Aziz, Azizuddin Abd, Daisuke Sumiyoshi, and Yasunori Akashi. "Design procedure for dual air handling unit of air-conditioning system." MATEC Web of Conferences 225 (2018): 04016. http://dx.doi.org/10.1051/matecconf/201822504016.

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The use of conventional air-conditioning system in tropical climate is ineffective to reduce the humidity. In a typical application, the indoor temperature has to be overcooled to decrease the humidity which has an inherent effect of high energy consumption. The introduction of dual air handling unit (AHU) is the answer to high humidity environment. Each AHU is tasked to control the parameter of temperature and humidity respectively according to the desired value. In this paper, the objective is to design the procedure of sizing the dual AHU so that the control system could run efficiently. Ba

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Hamidi, Omid, Hamed Abbasi, and Hamid Mirhashemi. "Analysis of the Response of Urban Water Consumption to Climatic Variables: Case Study of Khorramabad City in Iran." Advances in Meteorology 2021 (March 18, 2021): 1–14. http://dx.doi.org/10.1155/2021/6615152.

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Iran is located in a dry climate belt. Such conditions have made the supply of urban water resources one of the most fundamental management challenges. The amount of water consumed in a city is affected by the weather conditions greatly such that as the weather changes, the amount of water consumed changes as well. In this study, several models including zero-order Pearson’s correlation coefficient, first-order Pearson’s correlation, generalized additive model (GAM), generalized linear model (GLM), support vector machine (SVM-Nu), and simplex optimization algorithm were used in order to identi

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Zhang, Tao, Zhongguang Fu, and Hao Zhou. "Experimental Study of the Effect of Humidity on Air Filter Material Performance." Energies 16, no. 9 (2023): 3626. http://dx.doi.org/10.3390/en16093626.

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A large number of application cases show that air filter media are easy to fail under extreme conditions of high humidity, haze, rain and snow, thus seriously affecting the energy efficiency of gas turbines. To study the impact of humidity on the dust-holding performance of filter media, three typical filter media applied for gas turbines with a similar efficiency are selected, and their dust-holding performance is investigated at a humidity of 30%, 60% and 75%, respectively. The results showed that the dust-holding pressure drop curves of three filter media were divided into two phases. With

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Han, S. H., K. R. Kim, D. K. Ahn, and Y. D. Choi. "Experimental analysis of a dimensionless number in the cathode channels of a polymer electrolyte membrane fuel cell with different head losses." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 1 (2009): 95–108. http://dx.doi.org/10.1243/09544062jmes1757.

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This study investigates the effects of stoichiometry, humidity, cell temperature, and pressure on the performance and the flooding of the proton exchange membrane fuel cell. Values of stoichiometry are 1.5, 2.0, and 2.5 at cell temperatures of 50, 55, and 60 °C, respectively. This study shows that the dimensionless flooding value (FV) is a function of the stoichiometry, humidity, temperature, and pressure. The FV is calculated by using the measured values of temperature, humidity, pressure, and flowrate of the cathode. The effect of the dimensionless number on the flooding of the cathode in th

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Qi, Xuejun, Xing Zhao, Bin Fu, Lanjing Xu, Haibin Yu, and Shuyan Tao. "Numerical Study on the Influence of Rivers on the Urban Microclimate: A Case Study in Chengdu, China." Water 15, no. 7 (2023): 1408. http://dx.doi.org/10.3390/w15071408.

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The urban heat island phenomenon in large cities is becoming increasingly serious as urbanization continues to develop, seriously affecting the lives of urban residents. Rivers can effectively alleviate urban heat islands and improve the thermal comfort of riverfront space in summer. Thus, the effect of rivers on the urban microclimate environment is studied in this work. A section of the Fu River in the inland city of Chengdu was selected as the research object, and a combination of experimental and numerical simulation methods was employed. ENVI-met software was used to study the river’s inf

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Nizovtsev, M. I., and V. N. Letushko. "Effect of phase transitions on operation of air-to-air heat exchangers with drop irrigation." Journal of Physics: Conference Series 2119, no. 1 (2021): 012076. http://dx.doi.org/10.1088/1742-6596/2119/1/012076.

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Abstract The article presents the results of experimental studies of the thermal and humidity parameters of air flows of a regenerative air-to-air heat exchanger with drop irrigation and an intermediate heat carrier when operating in winter conditions with negative outside temperatures. The dependences of temperature and humidity efficiency of the heat exchanger on saline solution flow rate were determined, while the maximum temperature efficiency in the heating column was more than 70%. It is shown that under all investigated regimes in the heating column, moisture evaporated from the saline

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Nedvěd, Oldřich, and Plamen Kalushkov. "Effect of Air Humidity on Sex Ratio and Development of LadybirdHarmonia axyridis(Coleoptera: Coccinellidae)." Psyche: A Journal of Entomology 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/173482.

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Length of development of larvae and pupae of the invasive alien ladybird beetleHarmonia axyridis, their survival rates, sex ratio, and fresh mass of the emerged adults were measured at three contrasting levels of relative air humidity: 30, 60, and 90%, 25°C and photoperiod 16L : 8D. Overall sex ratio was 51%, but there was a strong trend for higher proportion of males at low humidity and higher proportion of females at high humidity. Survival rate, larval developmental time, and adult mass were all differently influenced by air humidity depending on the food type. In individuals fed with aphid

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Marczyński, Szczepan, and H. B. Tukey, Jr. "Effect of relative humidity on foliar absorption of P and Rb by Chrysanthemum and Pilea." Acta Agrobotanica 39, no. 2 (2013): 249–59. http://dx.doi.org/10.5586/aa.1986.022.

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Air humidity differentially affected the foliar absorption of <sup>33</sup>P and <sup>86</sup>Rb by <i>Chrysanthemum morifolium</i> 'Giant # 4 Indianapolis White' and <i>Pilea cardierei</i>. As the relative humidity increased from 47 to 80% in most cases, there was in increase in uptake. Further raising of humidity to 92% increased uptake of Rb and P by <i>Chrysanthemum</i> leaves only when guttation did not occure . Air humidity influenced most strongly the uptake of calcium phosphate probably due to its low solubility.

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Chang, Tingting, Chun Wang, Fuqing Wang, and Kun Wang. "Simulation on Evaporation and Cooling Characteristics of Spray System." Journal of Physics: Conference Series 2599, no. 1 (2023): 012036. http://dx.doi.org/10.1088/1742-6596/2599/1/012036.

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Abstract This study explored the evaporation and cooling characteristics of air pipeline spray based on computational fluid dynamics method. A geometric model of the pipeline air spray was constructed and meshed, and the Euler-Lagrange research method of the discrete phase model (DPM) was used to study the evaporation and cooling characteristics of the spray system. It was found that the length required for complete evaporation of droplets increased with the relative humidity. When the inlet temperature was 308K and the relative humidity was 40%, the evaporation length increased by 43.71% comp

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Kato, Mikiro, Tomoko Sakihama, Yoshio Kinjo, David Itokazu, and Yasuharu Tokuda. "Effect of Climate on COVID-19 Incidence: A Cross-Sectional Study in Japan." Korean Journal of Family Medicine 43, no. 1 (2022): 37–41. http://dx.doi.org/10.4082/kjfm.20.0260.

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Background: Effect of meteorological factors such as air temperature, humidity, and sunlight exposure on transmission dynamics of novel coronavirus disease 2019 (COVID-19) remains controversial. We investigated the association of these factors on COVID-19 incidence in Japan.Methods: We analyzed data on reverse transcription polymerase chain reaction confirmed COVID-19 cases for each prefecture (total=47) in Japan and incidence rate was defined as the number of all reported cumulative cases from January 15 to March 17, 2020. Independent variables of each prefecture included three climatic varia

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Misha, Suhaimi, Ali Sohif Mat, Mohd Hafidz Ruslan, Kamaruzzaman Sopian, and Elias Salleh. "The Effect of Drying Air Temperature and Humidity on the Drying Kinetic of Kenaf Core." Applied Mechanics and Materials 315 (April 2013): 710–14. http://dx.doi.org/10.4028/www.scientific.net/amm.315.710.

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Drying kinetics of kenaf core was investigated in a Low Temperature and Humidity Chamber Test. The drying experiments were carried out at temperature of 45, 50 and 55°C and air relative humidity of 10, 20 and 30% using a constant air velocity of 1.0 m/s. The moisture content data at various drying air conditions were converted to moisture ratio and plotted against time to obtain the drying curves for each experimental data. The curves were fitted to eight different thin layer drying models to determine a suitable model for drying of kenaf core. The fit quality of the models was evaluated based

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Sui, Lu Yan, Xiao Ping Miao, Liang Kai Fan, and Dai Yong Jia. "The SMER Simulation Solution of Air Volume on the Effects of Dehumidifier." Applied Mechanics and Materials 291-294 (February 2013): 1863–66. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.1863.

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This paper adopts the Matlab language to program the SMER dehumidifier. Through simulation calculation, the effect of air, inlet air humidity and temperature on SMER was carried out, the relationship among the three factors was also gotten. The influence of humidity on the optimal air volume according to the maximum of the dehumidification is more than the temperature influence. The paper can provide certain basis for the optimal air volume setting.

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Luo, Qing, Hongjie Zhang, Lin Lin, Min Chen, and Yahong Sun. "A mathematical hypothesis to research the effects of heat and humidity from the TGR on the local climate." Journal of Water and Climate Change 10, no. 1 (2018): 30–42. http://dx.doi.org/10.2166/wcc.2018.067.

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Abstract Previous research studies focused only on data of local air temperature and humidity, ignoring the water body itself, which cannot definitively answer the question of how the Three Gorges Reservoir's (TGR) water affects the local climate overall. To understand the effect of the TGR on the local climate quantitatively, this paper provides an original mathematical hypothesis and proves in theory there is only one way to calculate the transfer of heat and humidity between the TGR and the local air. Based on this mathematical hypothesis, a detailed research method to explore the effects o

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Lipczynska, Aleksandra, Jan Kaczmarczyk, and Beata Dziedzic. "Effect of Indoor Green Walls on Environment Perception and Well-Being of Occupants in Office Buildings." Energies 17, no. 22 (2024): 5690. http://dx.doi.org/10.3390/en17225690.

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Office employees often face discomfort due to dry air, impacting their productivity. Existing solutions like standalone humidifiers or HVAC-integrated systems are either inefficient or costly. Thus, maintaining optimal air humidity remains a challenge. Green walls offer a potential solution by influencing humidity and air quality. A survey was conducted in five Warsaw office buildings involving 85 participants to investigate this issue. Measurements were taken in three stages: without humidifiers, with standalone humidifiers, and with green walls. The results showed a high acceptance of humidi

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Elijah, Kusi1* Humphrey Danso1 Emmanuel Appiah-Kubi1, and Boateng2 Francis Gyimah2 Chelteau Barajei2 Isaac. "Effect of Airflow on Thermal Comfort in a Naturally Ventilated University Classroom." MSI Journal of Multidisciplinary Research (MSIJMR) Volume 2, Issue 5 (2025): 06–30. https://doi.org/10.5281/zenodo.15332652.

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The health, productivity, and learning capacities of the people who use a classroom are greatly impacted by the indoor thermal conditions. Airflow short-circuiting, draft discomfort, and uncomfortable temperature stratification are just a few of the issues that can arise from inadequate air distribution in a classroom. The Classroom ESABSF was selected for the airflow analysis on thermal comfort in a naturally ventilated university classroom. The selection was based on the indoor thermal environmental conditions measured and simulated. The Classroom ESABSF, which measures 24 x 25 x 5m (length

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