Using Probabilistic Calculation for the Assessment of the Risk of Water Vapor Condensation on Structures

2014 ◽  
Vol 1020 ◽  
pp. 534-539
Author(s):  
Denisa Donová ◽  
Naďa Zdražilová ◽  
Veronika Šípková
Keyword(s):  
Water Vapor ◽  
Surface Temperature ◽  
Vocational Training ◽  
Internal Surface ◽  
Vapor Condensation ◽  
Dew Point ◽  
Training Center ◽  
Water Vapor Condensation ◽  
Inner Surface

The aim of this paper is the assessment of structures in terms of the lowest internal surface temperature. It assessed the risk of condensation of water vapor on the surface of these structures. This assessment will be conducted by probabilistic calculation based on data acquired in Vocational training center MSDK. Using this calculation will be found how many times during the year the internal surface temperature drops below the dew point on the inner surface of the structures.

WATER VAPOR CONDENSATION ON THE INNER SURFACE OF AN N95 FILTERING FACEPIECE RESPIRATOR

2019 ◽  
Vol 50 (3) ◽  
pp. 217-231
Author(s):  
Yu Rao ◽  
Hui Li ◽  
Shengnan Shen ◽  
Quan Yang ◽  
Guoqing Zhang ◽  
...  
Keyword(s):  
Water Vapor ◽  
Vapor Condensation ◽  
Water Vapor Condensation ◽  
Inner Surface

scholarly journals An Experimental Investigation of Water Vapor Condensation from Biofuel Flue Gas in a Model of Condenser, (1) Base Case: Local Heat Transfer without Water Injection

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 844
Author(s):  
Robertas Poškas ◽  
Arūnas Sirvydas ◽  
Vladislavas Kulkovas ◽  
Povilas Poškas
Keyword(s):  
Heat Transfer ◽  
Water Vapor ◽  
Flue Gas ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Water Injection ◽  
Vapor Condensation ◽  
Base Case ◽  
Water Vapor Condensation ◽  
Condensing Heat Exchanger

Waste heat recovery from flue gas based on water vapor condensation is an important issue as the waste heat recovery significantly increases the efficiency of the thermal power units. General principles for designing of this type of heat exchangers are known rather well; however, investigations of the local characteristics necessary for the optimization of those heat exchangers are very limited. Investigations of water vapor condensation from biofuel flue gas in the model of a vertical condensing heat exchanger were performed without and with water injection into a calorimetric tube. During the base-case investigations, no water was injected into the calorimetric tube. The results showed that the humidity and the temperature of inlet flue gas have a significant effect on the local and average heat transfer. For some regimes, the initial part of the condensing heat exchanger was not effective in terms of heat transfer because there the flue gas was cooled by convection until its temperature reached the dew point temperature. The results also showed that, at higher Reynolds numbers, there was an increase in the length of the convection prevailing region. After that region, a sudden increase was observed in heat transfer due to water vapor condensation.

Water vapor condensation on binary mixed substrates: A molecular dynamics study

2021 ◽  
pp. 122281
Author(s):  
Zi-Jie Wang ◽  
Shao-Yu Wang ◽  
Dan-Qi Wang ◽  
Yan-Ru Yang ◽  
Xiao-Dong Wang ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Water Vapor ◽  
Vapor Condensation ◽  
Mixed Substrates ◽  
Water Vapor Condensation

Gasdynamic water-vapor-condensation laser

1975 ◽  
Vol 5 (9) ◽  
pp. 1131-1132
Author(s):  
V K Konyukhov ◽  
A M Prokhorov ◽  
V I Tikhonov ◽  
V N Faizulaev
Keyword(s):  
Water Vapor ◽  
Vapor Condensation ◽  
Water Vapor Condensation

scholarly journals Methods for Determining Mold Development and Condensation on the Surface of Building Barriers

Buildings ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 4 ◽  
Author(s):  
Aleksander Starakiewicz ◽  
Przemysław Miąsik ◽  
Joanna Krasoń ◽  
Lech Lichołai
Keyword(s):  
Water Vapor ◽  
Vapor Condensation ◽  
Mold Growth ◽  
Vapor Pressures ◽  
Climate Conditions ◽  
Outdoor Climate ◽  
Surface Condensation ◽  
Water Vapor Condensation ◽  
Calculation Results ◽  
Temperature Factors

The article presents four equivalent methods for checking mold growth on the surface of building barriers and checking water vapor condensation on their surface. Each method applies to two parallel phenomena that may occur on a building barrier. The first method is to calculate and compare temperature factors. In the second method, the characteristic humidity in the room is calculated and compared. The third method is to calculate and compare the characteristic temperatures in the room. The fourth method is based on the calculation and comparison of characteristic water vapor pressures. Three boundary conditions are presented for each method and phenomenon: when a given phenomenon can occur, when it begins or ends, and when it does not occur. The presented methods systematize the approach to the problem of mold development and surface condensation. The presented calculation results relate to the selected building barrier functioning in specific indoor and outdoor climate conditions. The calculation results confirm the compliance of the presented methods in identifying the phenomenon of mold growth or condensation on the surface of the barrier. A graphical interpretation of the results for each method with periods of occurrence or absence of a given phenomenon is also presented.

scholarly journals In situ monitoring of internal surface temperature of the historic building envelope

2016 ◽  
Vol 11 (1) ◽  
pp. 77-84
Author(s):  
Veronika Labovská ◽  
Dušan Katunský
Keyword(s):  
Surface Temperature ◽  
Internal Surface ◽  
Building Envelope ◽  
In Situ Monitoring ◽  
Heat Accumulation ◽  
Historical Building ◽  
External Temperature ◽  
Inner Surface ◽  
Real Behavior

Abstract Historical building envelope is characterized by a large accumulation that impact is mainly by changing the inner surface temperature over time. The minimum value of the inner surface temperature is set Code requirements. In the case of thermal technology assessment of building envelope contemplates a steady state external temperature and internal environment, thereby neglecting the heat accumulation capacity of building envelopes. Monitoring surface temperature in real terms in situ shows the real behavior of the building envelope close to reality. The recorded data can be used to create a numerical model for the simulation.

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