The Surface Temperature Factor - An Assessment Criterion of Superficial Condensation Risk

2017 ◽  
Vol 21 ◽  
pp. 497-505
Author(s):  
Irina Baran ◽  
Mihaela Stela Georgescu ◽  
Laura Dumitrescu ◽  
Irina Bliuc ◽  
Radu Aurel Pescaru
Keyword(s):  
Complex Analysis ◽  
Phenomenological Approach ◽  
Temperature Factor ◽  
Simultaneous Action ◽  
Risk Level ◽  
Indoor Climate ◽  
Climate Conditions ◽  
Outdoor Climate ◽  
Surface Condensation ◽  
Definition Of

The emergence of condense phenomenon, generally associated with the mould, on the inner surface of the closing elements affects not only the finishing works quality, but also the comfort conditions and, not least, the occupants’ health. The phenomenon is caused by the simultaneous action of several categories of factors. If factors related to the design and structure of closing elements can be controlled by proper design and execution respecting the quality requirements, those related to users’ behaviour and to indoor and outdoor climate conditions, have a variable and random character. Hence there is the possibility that all or most of parameters, that reflect the action of these factors simultaneously, reach values ​​that can cause mould and condensation on the surface. In these circumstances we can speak of a risk level defined as the possibility of producing an undesirable event. The risk assessment involves the precise definition of it and finding a way to calculate how often such an event may occur under particular conditions. One of the criteria to be taken into account to estimate the risk of superficial condensation is the temperature factor. The effective value of this criterion is influenced by several categories of factors that refer to the indoor climate conditions influenced by users’ behaviour, constructive and architectural features and outdoor climate. The objective of this paper is to integrate a phenomenological approach of producing the surface condensation and mould in a complex analysis, through this global criterion, using the concept of "risk”.

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 Managing climate-change-induced overheating in non-residential buildings

2020 ◽  
Vol 172 ◽  
pp. 02009
Author(s):  
André Badura ◽  
Birgit Mueller ◽  
Ivo Martinac
Keyword(s):  
Energy Demand ◽  
Energy Use ◽  
Residential Buildings ◽  
Climate Extremes ◽  
Building Design ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Indoor Climate ◽  
Climate Conditions ◽  
Outdoor Climate

Large and rapid climatic changes can be uncomfortable and sometimes hazardous to humans. Buildings protect people from external climatic conditions, and also mitigate the impacts of external climate extremes through their design and construction, as well as with the help of dedicated building service and other technical systems. Active space conditioning accounts for more than 30 per cent of the overall final energy use in Germany. In the life cycle of a building, the construction phase (planning and construction) is the phase with the shortest duration. However, the quality applied during this phase has a significant impact on the resources required, as well as the overall building performance during the much longer operational phase. Once built, buildings are often unable to adapt to boundary conditions that were not considered in the original building design. Consequently, changing outdoor climate conditions can result in an uncomfortable indoor climate over the lifetime of a building. The aim of this study was to determine the effectiveness of flexible solutions for reducing winter heating loads and to reducing/avoiding summer cooling loads in nonresidential buildings in Germany. Various external shading scenarios for non-residential buildings were analysed using the IDA ICE indoor climate and energy simulation tool. Key simulation parameters included the orientation and location of the building, as well as the envelope structure. We investigated the impacts of solar shading on heat storage in the building mass and indoor climate and how different types of envelopes affect overall energy use. The result shows that the use of an adaptive building envelope allows a higher reduction of the total energy demand by 7 % to 15 % compared to an increase in insulation thickness only.

scholarly journals Indoor Airflow Distribution in Repository Design: Experimental and Numerical Microclimate Analysis of an Archive

Buildings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 152
Author(s):  
Karin Kompatscher ◽  
Rick P. Kramer ◽  
Bart Ankersmit ◽  
Henk L. Schellen
Keyword(s):  
Vertical Gradient ◽  
Building Envelope ◽  
Cfd Modeling ◽  
Indoor Climate ◽  
Ambient Conditions ◽  
Climate Control ◽  
Climate Conditions ◽  
Airflow Distribution ◽  
Air Mixing ◽  
Delay Variations

The majority of cultural heritage is stored in archives, libraries and museum storage spaces. To reduce degradation risks, many archives adopt the use of archival boxes, among other means, to provide the necessary climate control and comply with strict legislation requirements regarding temperature and relative air humidity. A strict ambient indoor climate is assumed to provide adequate environmental conditions near objects. Guidelines and legislation provide requirements for ambient indoor climate parameters, but often do not consider other factors that influence the near-object environment, such as the use of archival boxes, airflow distribution and archival rack placement. This study aimed to provide more insight into the relation between the ambient indoor conditions in repositories and the hygrothermal conditions surrounding the collection. Comprehensive measurements were performed in a case study archive to collect ambient, local and near-object conditions. Both measurements and computational fluid dynamics (CFD) modeling were used to research temperature/relative humidity gradients and airflow distribution with a changing rack orientation, climate control strategy and supply as well as exhaust set-up in a repository. The following conclusions are presented: (i) supplying air from one air handling unit to multiple repositories on different floors leads to small temperature differences between them. Differences in ambient and local climates are noticed; (ii) archival boxes mute and delay variations in ambient conditions as expected—however, thermal radiation from the building envelope may have a large influence on the climate conditions in a box; (iii) adopting night reduction for energy conservation results in an increased influence of the external climate, with adequate insulation, this effect should be mitigated; and (iv) the specific locations of the supply air and extraction of air resulted in a vertical gradient of temperature and insufficient mixing of air, and adequate ventilation strategies should enhance sufficient air mixing in combination with the insulation of external walls, and gradient forming should be reduced.

THE EFFECT OF OUTDOOR CLIMATE CONDITIONS ON PASSIVE GREENHOUSE DESIGN

2009 ◽  
pp. 61-66 ◽  
Author(s):  
Bram Vanthoor ◽  
Cecilia Stanghellini ◽  
Eldert van Henten ◽  
Pieter de Visser
Keyword(s):  
Climate Conditions ◽  
Outdoor Climate

scholarly journals ECONOMIC SECURITY OF SMALL AGRICULTURAL ENTERPRISES

2019 ◽  
Vol 1 (15) ◽  
pp. 181-185
Author(s):  
M.V. Boiko
Keyword(s):  
Economic Security ◽  
Risk Level ◽  
Economic Science ◽  
Economic Stability ◽  
Economic Space ◽  
Agricultural Enterprises ◽  
Basic Approaches ◽  
Definition Of ◽  
Theoretical Foundations ◽  
Single Approach

The article “Economic Security of Small Agricultural Enterprises” aims at exploring the theoretical foundations of economic security for small agricultural enterprises. The basic approaches to definition of the category "economic security of the enterprise" are investigated. The theoretical bases of the definition of "economic security" are considered. The integration of Ukraine into the global economic space implies the modernization of the modern financial and economic system, which envisages the transition of market entities to a new level of relations and the leveling of traditional geographical boundaries. At the same time, the conditions of functioning of enterprises in a market environment become more stringent due to the expansion of the range of probable threats and dangers, which increase the risk level of conducting business activities, increasing uncertainty, and increasing competition. It is economic security that can provide the enterprise with effective functioning, economic stability, development and improvement of its competitiveness level. The main purpose of this work is to research and analyze the major achievements of economic science in the economic security of a small business and to present the author's vision of the essence of this concept. The set of research methods is the methodology of analysis and organization of major publications, legislation and laws, namely methods of generalization, comparison, chronologization, analysis and generalization. The author's vision of interpreting the concept of "economic security of enterprises" is a scientific novelty. The practical value of the study is to analyze the main publications on the definition of the essence of the concept of “economic security of the enterprise”, because today there is no single approach that would clearly interpret this concept.

scholarly journals As Espiritualidades em Psicoterapeutas Junguianos e Transpessoais: Um Breve Estudo Fenomenológico

2020 ◽  
Vol 26 (2) ◽  
pp. 135-146
Author(s):  
Aurino Lima FERREIRA ◽  
Laila Anine Candida da SILVA ◽  
Sidney Carlos Rocha da SILVA ◽  
Marlos Alves BEZERRA
Keyword(s):  
Qualitative Research ◽  
Internal Energy ◽  
Scientific Literature ◽  
Phenomenological Approach ◽  
Structured Interview ◽  
The Self ◽  
Unconditional Love ◽  
Psychological Theories ◽  
Definition Of ◽  
The City

Spirituality as a human phenomenon presents itself as a significant aspect in the understanding and promotion of health, yet its study was neglected by psychological theories, with the exception of Jung's pioneering studies and the transpersonal approach. In this sense, we aim to present the vision of spirituality among psychologists from the city of Recife (in Brazil) who are guided by these theoretical lines, indicating how this phenomenon is experienced in their professional practices. We performed a phenomenological qualitative research that had as instrument the semi-structured interview with eight psychologists. The data were analyzed according to Bicudo's phenomenological approach and are in agreement with the scientific literature in this field, which indicates that there is no hegemonic definition of spirituality. There are visions of spiritualities, sometimes singular, sometimes common. Spirituality sometimes appears as synonymous with unconditional love, sometimes as access to the transcendent, without denying immanence. It also arises as internal energy and access to the Higher Self or just the Self. In the clinic it is considered as health promoter and approached from the demand in the Jungian perspective and seen as contextual in the transpersonal. We raised reflections on the importance of spirituality to the understanding of human being in its complexity.

Experimental Full-Scale Test Cell Optimizing for Research of Novel Concepts towards Climatically Active Solar Façade Design

2016 ◽  
Vol 861 ◽  
pp. 213-220 ◽  
Author(s):  
Miroslav Čekon ◽  
Richard Slávik ◽  
Karel Struhala ◽  
Marian Formánek
Keyword(s):  
Numerical Models ◽  
Test Methods ◽  
Full Scale ◽  
Test Cell ◽  
Full Scale Test ◽  
Climate Conditions ◽  
Outdoor Climate ◽  
Research Activities ◽  
Building Components ◽  
Scale Test

The passive solar test facilities have recently been created in many research centers all over the world to analyse dynamic outdoor phenomena on buildings and their components. The main objective of these research activities is primarily to evolve a methodology, improve test methods, validate numerical models and measure real thermodynamic properties of building components under outdoor climate conditions. An integration of advanced material solutions into buildings need to be investigated within specific conditions related specifically to outdoor test methods. A research project on Contemporary concepts of climatically active solar facades at the Brno University of Technology does have an ambition to create an experimental full-scale test cell for research of thermal aspects in progressive advances of future solar façade concepts exposed to the real climate conditions. This paper describes the design optimization phase preceding the test cell assembly. This phase includes the analysis of energy and thermal properties based on parametric study features. Computer simulations based on finite element and volume methods are involved in the optimization process. The proposed optimized test cell design is confronted with parametrization of typical thermal aspects to present final test cell demonstration.

Short-term Measurements of Indoor Environmental Quality in Selected Offices – Case Study

2017 ◽  
Author(s):  
Ludmila Meciarova ◽  
Silvia Vilcekova ◽  
Eva Kridlova Burdova ◽  
Ilija Zoran Apostoloski ◽  
Danica Kosicanova
Keyword(s):  
Environmental Quality ◽  
Indoor Air ◽  
Indoor Environmental Quality ◽  
Indoor Climate ◽  
Climate Conditions ◽  
Healthy Environment ◽  
Health And Wellbeing ◽  
The One

Decent quality of indoor air is important for health and wellbeing of building users. We live, work and study in indoors of various types of buildings. Often people are exposed to pollutants at higher concentrations than these that occur out-doors. Continual investigation of indoor air quality is needed for ensuring comfort and healthy environment. Measuring and analysis of occurrence of physical, chemical and biological factors is the first step for suggestion of optimization measures. Inside school buildings there are often inadequate indoor climate conditions such as thermal comfort parame-ters or ventilation. The aim of this study was determination of indoor environmental quality in selected offices in the building of elementary school in Slovakia. The values of operative temperature were not within the optimum range of values for the warm period of the year in one of the monitored offices. The intensity of illumination was lower in the two offices. Low levels of particulate matters were measured except the one office where permissible value was exceeded by 7.6%.

Initial Results of Monitoring the Temperature on the Facade of Office Building

2019 ◽  
Vol 887 ◽  
pp. 411-418
Author(s):  
Peter Juras ◽  
Radoslav Ponechal ◽  
Daniela Štaffenová
Keyword(s):  
Temperature Distribution ◽  
Air Temperature ◽  
Full Scale ◽  
Office Building ◽  
Wind Flow ◽  
Climate Conditions ◽  
Outdoor Climate ◽  
Measurement Units ◽  
Weather Stations ◽  
Initial Results

This paper deals with creating of the unique measurement units on the building façade, which enable the possibility to conduct a full-scale measurement of the outdoor climate parameters around the building. The façade of the Research center building, which is a part of University of Zilina campus, is equipped with 36 weather stations to measure the outdoor climate conditions and impact of the building on the approaching wind flow, air temperature distribution, solar radiance impact on the façade etc.In this article, the change of temperatures within the time and place on the facade (sides, position, time), is monitored. This takes into account the surroundings of the building and the temperature on the façade and comparison to the measured “basic” air temperature.

scholarly journals The Analysis of Outdoor Climate, Moist Air Enthalpy and their Relation to Cooling Energy Consumption in the Tropics

2018 ◽  
Vol 7 (4.35) ◽  
pp. 254
Author(s):  
Waraporn Rattanongphisat ◽  
Anantachai Suwannakom
Keyword(s):  
Energy Consumption ◽  
Correlation Coefficient ◽  
Energy Demand ◽  
Climate Data ◽  
Outdoor Temperature ◽  
Indoor Climate ◽  
Outdoor Climate ◽  
Enthalpy Difference ◽  
One Year ◽  
The Tropics

The air conditioned auditorium classroom was monitored for energy consumption by a monitoring platform. One year collected data from energy consumption and indoor climate monitoring systems and outdoor climate data in Phitsanulok province, Thailand, where its climate classified as the tropics, was employed to determine their relation by regression analysis. The analysis of climate data showed that the outdoor temperature above 26 oC was accounted for 70% of the year this emphasizes on cooling requirement. Furthermore, the hourly cooling energy consumption ranged from 8.1 to 10.3 kWh for indoor air temperature between 20 oC and 32 oC.  The higher outdoor temperature causes the greater cooling energy consumption. The correlation between outdoor temperature and cooling energy consumption with linear regression showed the correlation coefficient of 0.38 while the correlation between temperature difference and enthalpy difference of the outdoor and indoor found the correlation coefficient of 0.71. This pointed out that the outdoor tropical climate highly affected to the cooling energy demand.

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