Title
The local thermal comfort impact on working productivity loss in non-residental buildings
Creator
Bajc, Tamara S., 1984-
Copyright date
2017
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
Dozvoljavate samo preuzimanje i distribuciju dela, ako/dok se pravilno naznačava ime autora, bez ikakvih promena dela i bez prava komercijalnog korišćenja dela. Ova licenca je najstroža CC licenca. Osnovni opis Licence: http://creativecommons.org/licenses/by-nc-nd/3.0/rs/deed.sr_LATN. Sadržaj ugovora u celini: http://creativecommons.org/licenses/by-nc-nd/3.0/rs/legalcode.sr-Latn
Language
English
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 23. 06. 2017.
Other responsibilities
mentor
Banjac, Miloš, 1968-
član komisije
Todorović, Maja, 1971-
član komisije
Gojak, Milan, 1960-
član komisije
Papadopoulos, Agis.
član komisije
Stevanović, Žana.
Academic Expertise
Tehničko-tehnološke nauke
University
Univerzitet u Beogradu
Faculty
Mašinski fakultet
Alternative title
Утицај локалног стања топлотног комфора на смањење радне способности у нестамбеним зградама
Publisher
[T. S. Bajc]
Format
XXVII, 174 lista
description
Mechanical engineering-Thermomechanics, Thermal science engineering / Машинство-Термомеханика, Термотехника
Abstract (en)
The dissertation is dedicated to the local thermal discomfort impact on
occupants’ productivity loss. The research was performed in real classroom, during the
winter semester, for moderate climate conditions, involving voluntaries, students of the
Mechanical engineering Faculty of Belgrade. The measurement had been performed for
four weeks, on the different circumstances of thermal comfort conditions which had
been provoked using four different scenarios and various methods. The local thermal
discomfort is valuated using three scientific methods: experimental, statistical and
numerical research. The improved methodology for measuring the physical parameters
of the environment in real conditions was introduced. The local thermal discomfort is
investigated using the key parameters: floor temperature, radiant asymmetry, vertical air
difference and draught intensity. The student' skin temperature measurements are also
presented, together with the results of thermal imaging camera recording used as a
control method.
The various statistical surveys were performed and valuable data regarding
occupants’ thermal sensations and impact of local thermal comfort on working
performances have been discussed. The statistical survey was conducted on young adult
population, age between 20 and 25, predominantly male and healthy. The novel
questionnaires had been developed, with special reference to the questions regarding
local thermal comfort and occupants’ productivity loss. The productivity of the students
was evaluated using the novel questionnaires and concentration test developed
especially for this purpose. The productivity results were gathered based on 240 tests
that had been performed.
In numerical part of the survey, the novel models were developed and physical
parameters were simulated using the commercial software for Computational Fluid
Dynamics. The results were gathered for every point within the classroom model. These
simulations can be used in a lack of measuring possibilities in similar types of buildings...
Abstract (sr)
Дисертација обухвата разматрање утицаја стања локалног топлотног
дискомфора на смањење продуктивности корисника простора. Истраживање је
спроведено у реалним условима, у учионици, у току зимског семестра, за
умерено-континенталне климатске услове, укључујући добровољно учешће
студената Машинског факултета Универзитета у Београду. Мерења су вршена
током четири недеље, у различитим условима топлотног комфора, који је вариран
у четири различитa сценаријa, коришћењем више метода. Локални топлотни
дискомфор је оцењен анализом резулатата који су добијени коришћењем три
научне методе истраживања: експерименталне, статистичке и нумеричке методе
истраживања. Унапређена је методологија мерења физичких параметара
унутрашње средине у реалним условима. Локални топлотни дискомфор је
разматран на основу анализе више кључних параметара, као што су: температура
пода, радијантна асиметрија, вертикална температурска разлика и интензитет
промаје. Резултати мерења температуре површине коже студената и снимци
термовизијском камером, који су коришћени као контролно мерење, су такође
презентовани у раду.
Различите статистичке анализе су спроведене и значајни подаци о утисцима
корисника о утицају локалног топлотног комфора на смањење радне способности
су разматрани. Статистичко истраживање је извршено на претежно мушкој,
здравој популацији, која обухвата младе, одрасле људе, старости између 20 и 25
година. Нови упитници су развијени, са посебном пажњом усмереном на питања о
локалном топлотном комфору и утицају на радну способност корисника.
Продуктивност корисника је оцењена помоћу нових упитника и тестова
концентрације који су развијени у оквиру истраживања. Резултати
продуктивности корисника су обрађени на основу 240 тестова који су спроведени...
Authors Key words
thermal comfort, local thermal discomfort, PMV, PPD, productivity loss,
CFD simulations, productivity tests, indoor environmental quality, thermal imaging,
skin temperature measurements
Authors Key words
топлотни комфор, локални топлотни дискомфор, PMV, PPD,
губитак радне способности, CFD симулације, тестови продуктивности, квалитет
унутрашње средине, снимање термовизијском камером, мерење температуре коже
Classification
697.1:536.24(043.3)
Type
Tekst
Abstract (en)
The dissertation is dedicated to the local thermal discomfort impact on
occupants’ productivity loss. The research was performed in real classroom, during the
winter semester, for moderate climate conditions, involving voluntaries, students of the
Mechanical engineering Faculty of Belgrade. The measurement had been performed for
four weeks, on the different circumstances of thermal comfort conditions which had
been provoked using four different scenarios and various methods. The local thermal
discomfort is valuated using three scientific methods: experimental, statistical and
numerical research. The improved methodology for measuring the physical parameters
of the environment in real conditions was introduced. The local thermal discomfort is
investigated using the key parameters: floor temperature, radiant asymmetry, vertical air
difference and draught intensity. The student' skin temperature measurements are also
presented, together with the results of thermal imaging camera recording used as a
control method.
The various statistical surveys were performed and valuable data regarding
occupants’ thermal sensations and impact of local thermal comfort on working
performances have been discussed. The statistical survey was conducted on young adult
population, age between 20 and 25, predominantly male and healthy. The novel
questionnaires had been developed, with special reference to the questions regarding
local thermal comfort and occupants’ productivity loss. The productivity of the students
was evaluated using the novel questionnaires and concentration test developed
especially for this purpose. The productivity results were gathered based on 240 tests
that had been performed.
In numerical part of the survey, the novel models were developed and physical
parameters were simulated using the commercial software for Computational Fluid
Dynamics. The results were gathered for every point within the classroom model. These
simulations can be used in a lack of measuring possibilities in similar types of buildings...
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