Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in Winter
This paper presents a comparative study of a clean technology based on a DSF (double skin facade) used in winter conditions in the occupied buildings comfort improvement, namely the thermal comfort and air quality. The performance of a solar DSF system, the building’s thermal response, the internal...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Clean Technologies |
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| Online Access: | https://www.mdpi.com/2571-8797/3/2/18 |
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| author | Eusébio Conceição João Gomes Maria Manuela Lúcio Maria Inês Conceição Hazim Awbi |
| author_facet | Eusébio Conceição João Gomes Maria Manuela Lúcio Maria Inês Conceição Hazim Awbi |
| author_sort | Eusébio Conceição |
| collection | DOAJ |
| description | This paper presents a comparative study of a clean technology based on a DSF (double skin facade) used in winter conditions in the occupied buildings comfort improvement, namely the thermal comfort and air quality. The performance of a solar DSF system, the building’s thermal response, the internal thermal comfort and the internal air quality are evaluated. In this study, a DSF system, an air transport system and a HVAC (heating, ventilating and air conditioning) system based on mixing ventilation are used. The study considers a virtual chamber occupied by eight persons and equipped, in the outside environment, by three DSFs. A new horary pre-programming control methodology is developed and applied when the airflow rate is constant and the number of DSFs to operate is variable, when the airflow rate is variable and the number of DSFs to operate is constant and when the airflow rate is variable and the number of DSFs to operate is variable. This work uses a numerical model that simulates the integral building thermal behavior and an integral human thermal response. The internal air, provided by a mixing ventilating system, is warmed using the DSF system. The air temperature inside the DSF system and the virtual chamber, the thermal comfort level using the PMV index, the internal air quality using the carbon dioxide concentration and the uncomfortable hours are calculated for winter conditions. The results obtained show that the energy produced in the DSF, using solar radiation, guarantees acceptable thermal comfort conditions in the morning and in the afternoon. The indoor air quality obtained at the breathing level is acceptable. It is found that the airflow rate to be used is more decisive than the DSF operating methodology. However, when a solution is chosen that combines a ventilation rate with the number of DSF to operate, both variables throughout the day can obtain simultaneously better results for indoor air quality and thermal comfort according to the standards. |
| first_indexed | 2024-03-10T12:41:19Z |
| format | Article |
| id | doaj.art-2c780ae64236425882977248f4976c17 |
| institution | Directory Open Access Journal |
| issn | 2571-8797 |
| language | English |
| last_indexed | 2024-03-10T12:41:19Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Clean Technologies |
| spelling | doaj.art-2c780ae64236425882977248f4976c172023-11-21T13:48:21ZengMDPI AGClean Technologies2571-87972021-04-013231133410.3390/cleantechnol3020018Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in WinterEusébio Conceição0João Gomes1Maria Manuela Lúcio2Maria Inês Conceição3Hazim Awbi4Faculdade de Ciências e Tecnologia, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, PortugalCINTAL, Campus de Gambelas, 8005-139 Faro, PortugalFaculdade de Ciências e Tecnologia, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, PortugalInstituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, PortugalSchool of Construction Management & Engineering, University of Reading, Reading RG6 6AW, UKThis paper presents a comparative study of a clean technology based on a DSF (double skin facade) used in winter conditions in the occupied buildings comfort improvement, namely the thermal comfort and air quality. The performance of a solar DSF system, the building’s thermal response, the internal thermal comfort and the internal air quality are evaluated. In this study, a DSF system, an air transport system and a HVAC (heating, ventilating and air conditioning) system based on mixing ventilation are used. The study considers a virtual chamber occupied by eight persons and equipped, in the outside environment, by three DSFs. A new horary pre-programming control methodology is developed and applied when the airflow rate is constant and the number of DSFs to operate is variable, when the airflow rate is variable and the number of DSFs to operate is constant and when the airflow rate is variable and the number of DSFs to operate is variable. This work uses a numerical model that simulates the integral building thermal behavior and an integral human thermal response. The internal air, provided by a mixing ventilating system, is warmed using the DSF system. The air temperature inside the DSF system and the virtual chamber, the thermal comfort level using the PMV index, the internal air quality using the carbon dioxide concentration and the uncomfortable hours are calculated for winter conditions. The results obtained show that the energy produced in the DSF, using solar radiation, guarantees acceptable thermal comfort conditions in the morning and in the afternoon. The indoor air quality obtained at the breathing level is acceptable. It is found that the airflow rate to be used is more decisive than the DSF operating methodology. However, when a solution is chosen that combines a ventilation rate with the number of DSF to operate, both variables throughout the day can obtain simultaneously better results for indoor air quality and thermal comfort according to the standards.https://www.mdpi.com/2571-8797/3/2/18clean technologyclean energiesDSFsolar radiationbuilding thermal behaviorthermal comfort level |
| spellingShingle | Eusébio Conceição João Gomes Maria Manuela Lúcio Maria Inês Conceição Hazim Awbi Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in Winter Clean Technologies clean technology clean energies DSF solar radiation building thermal behavior thermal comfort level |
| title | Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in Winter |
| title_full | Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in Winter |
| title_fullStr | Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in Winter |
| title_full_unstemmed | Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in Winter |
| title_short | Comparative Study of a Clean Technology Based on DSF Use in Occupied Buildings for Improving Comfort in Winter |
| title_sort | comparative study of a clean technology based on dsf use in occupied buildings for improving comfort in winter |
| topic | clean technology clean energies DSF solar radiation building thermal behavior thermal comfort level |
| url | https://www.mdpi.com/2571-8797/3/2/18 |
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