Effect of temperature and humidity on space charge quantities

The electric field distortion caused by space charge is an important factor affecting the operation reliability of oil–paper insulation in a converter transformer. To study the accumulation and decay characteristics of the space charge within oil-impregnated pressboard under DC and polarity reversal voltage, and consider the possible operating conditions of the converter transformer, the space charge behavior of oil-impregnated pressboard was measured by the pulsed electro-acoustic (PEA) method in the temperature range from −20 °C to 60 °C. The effect of temperature on the accumulation and decay characteristics of space charge is also analyzed. The space charge accumulated within the pressboard at low temperature is mainly homocharge injected by the electrode, while heterocharge formed by ion dissociation counteracts some of the homocharge at high temperature. Thus, the space charge of pressboard first increases, then decreases, with an increase in temperature. However, slow decay of the space charge causes severe distortion of the electric field distribution in the pressboard during voltage polarity reversal.

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Effect of Temperature and Humidity on Nasal Flora of Mice

Experimental Biology and Medicine ◽

10.3181/00379727-90-22060 ◽

1955 ◽

Vol 90 (2) ◽

pp. 446-448 ◽

Cited By ~ 3

Author(s):

S. A. Mayyasi ◽

J. M. Birkeland ◽

M. C. Dodd

Keyword(s):

Effect Of Temperature ◽

Temperature And Humidity

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Effect of temperature and humidity on the transmission properties of textile signal lines

Journal of the Textile Institute ◽

10.1080/00405000.2019.1658851 ◽

2019 ◽

Vol 111 (4) ◽

pp. 604-610 ◽

Cited By ~ 1

Author(s):

Jacek Leśnikowski

Keyword(s):

Effect Of Temperature ◽

Transmission Properties ◽

Temperature And Humidity

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The Effect of Temperature and Humidity May Reduce the Growth Rate of the Coronavirus Disease 2019 Epidemic

10.21203/rs.3.rs-27890/v1 ◽

2020 ◽

Author(s):

Lei Qin ◽

Qiang Sun ◽

Jiani Shao ◽

Yang Chen ◽

Xiaomei Zhang ◽

...

Keyword(s):

Growth Rate ◽

Relative Humidity ◽

Effect Of Temperature ◽

Average Temperature ◽

Temperature And Humidity ◽

Scatter Plots ◽

Low Humidity ◽

Average Relative Humidity ◽

Effects Of Temperature ◽

The Relationship

Abstract Background: The effects of temperature and humidity on the epidemic growth of coronavirus disease 2019 (COVID-19)remains unclear.Methods: Daily scatter plots between the epidemic growth rate (GR) and average temperature (AT) or average relative humidity (ARH) were presented with curve fitting through the “loess” method. The heterogeneity across days and provinces were calculated to assess the necessity of using a longitudinal model. Fixed effect models with polynomial terms were developed to quantify the relationship between variations in the GR and AT or ARH.Results: An increased AT dramatically reduced the GR when the AT was lower than −5°C, the GR was moderately reduced when the AT ranged from −5°C to 15°C, and the GR increased when the AT exceeded 15°C. An increasedARH increased theGR when the ARH was lower than 72% and reduced theGR when the ARH exceeded 72%.Conclusions: High temperatures and low humidity may reduce the GR of the COVID-19 epidemic. The temperature and humidity curves were not linearly associated with the COVID-19 GR.

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