Evaluating the Use of Displacement Ventilation for Providing Space Heating in Unoccupied Periods Using Laboratory Experiments, Field Tests and Numerical Simulations
Displacement ventilation is a proven method of providing conditioned air to enclosed spaces with the aim to deliver good air quality and thermal comfort while reducing the amount of energy required to operate the system. Until now, the practical applications of displacement ventilation have been exc...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-02-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/14/4/952 |
| _version_ | 1797411328009175040 |
|---|---|
| author | Saqib Javed Ivar Rognhaug Ørnes Tor Helge Dokka Maria Myrup Sverre Bjørn Holøs |
| author_facet | Saqib Javed Ivar Rognhaug Ørnes Tor Helge Dokka Maria Myrup Sverre Bjørn Holøs |
| author_sort | Saqib Javed |
| collection | DOAJ |
| description | Displacement ventilation is a proven method of providing conditioned air to enclosed spaces with the aim to deliver good air quality and thermal comfort while reducing the amount of energy required to operate the system. Until now, the practical applications of displacement ventilation have been exclusive to providing ventilation and cooling to large open spaces with high ceilings. The provision of heating through displacement ventilation has traditionally been discouraged, out of concern that warm air supplied at the floor level would rise straight to the ceiling level without providing heat to the occupied space. Hence, a separate heating system is regularly integrated with the displacement ventilation in cold climates, increasing the cost and energy use of the system. This paper goes beyond the common industry practice and explores the possibility of using displacement ventilation to provide heating without any additional heating system. It reports on experimental investigations conducted in laboratory and field settings, and numerical simulation of these studies, all aimed at investigating the application of displacement ventilation for providing a comfortable indoor environment in winter by preheating the space prior to occupancy. The experimental results confirm that the proposed concept of providing space heating in unoccupied periods without a separate heating system is possible with displacement ventilation. |
| first_indexed | 2024-03-09T04:43:30Z |
| format | Article |
| id | doaj.art-f602aa28c706479d81c0a9b1ecb34cf8 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T04:43:30Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f602aa28c706479d81c0a9b1ecb34cf82023-12-03T13:18:44ZengMDPI AGEnergies1996-10732021-02-0114495210.3390/en14040952Evaluating the Use of Displacement Ventilation for Providing Space Heating in Unoccupied Periods Using Laboratory Experiments, Field Tests and Numerical SimulationsSaqib Javed0Ivar Rognhaug Ørnes1Tor Helge Dokka2Maria Myrup3Sverre Bjørn Holøs4Building Services, Lund University, 221 00 Lund, SwedenClimate, Energy and Building Physics, Skanska Norway, 0107 Oslo, NorwayClimate, Energy and Building Physics, Skanska Norway, 0107 Oslo, NorwayClimate, Energy and Building Physics, Skanska Norway, 0107 Oslo, NorwayArchitectural Engineering, SINTEF Community, 0373 Oslo, NorwayDisplacement ventilation is a proven method of providing conditioned air to enclosed spaces with the aim to deliver good air quality and thermal comfort while reducing the amount of energy required to operate the system. Until now, the practical applications of displacement ventilation have been exclusive to providing ventilation and cooling to large open spaces with high ceilings. The provision of heating through displacement ventilation has traditionally been discouraged, out of concern that warm air supplied at the floor level would rise straight to the ceiling level without providing heat to the occupied space. Hence, a separate heating system is regularly integrated with the displacement ventilation in cold climates, increasing the cost and energy use of the system. This paper goes beyond the common industry practice and explores the possibility of using displacement ventilation to provide heating without any additional heating system. It reports on experimental investigations conducted in laboratory and field settings, and numerical simulation of these studies, all aimed at investigating the application of displacement ventilation for providing a comfortable indoor environment in winter by preheating the space prior to occupancy. The experimental results confirm that the proposed concept of providing space heating in unoccupied periods without a separate heating system is possible with displacement ventilation.https://www.mdpi.com/1996-1073/14/4/952indoor air qualitythermal comfortCO<sub>2</sub> concentrationsclassroompreheatingstratification |
| spellingShingle | Saqib Javed Ivar Rognhaug Ørnes Tor Helge Dokka Maria Myrup Sverre Bjørn Holøs Evaluating the Use of Displacement Ventilation for Providing Space Heating in Unoccupied Periods Using Laboratory Experiments, Field Tests and Numerical Simulations Energies indoor air quality thermal comfort CO<sub>2</sub> concentrations classroom preheating stratification |
| title | Evaluating the Use of Displacement Ventilation for Providing Space Heating in Unoccupied Periods Using Laboratory Experiments, Field Tests and Numerical Simulations |
| title_full | Evaluating the Use of Displacement Ventilation for Providing Space Heating in Unoccupied Periods Using Laboratory Experiments, Field Tests and Numerical Simulations |
| title_fullStr | Evaluating the Use of Displacement Ventilation for Providing Space Heating in Unoccupied Periods Using Laboratory Experiments, Field Tests and Numerical Simulations |
| title_full_unstemmed | Evaluating the Use of Displacement Ventilation for Providing Space Heating in Unoccupied Periods Using Laboratory Experiments, Field Tests and Numerical Simulations |
| title_short | Evaluating the Use of Displacement Ventilation for Providing Space Heating in Unoccupied Periods Using Laboratory Experiments, Field Tests and Numerical Simulations |
| title_sort | evaluating the use of displacement ventilation for providing space heating in unoccupied periods using laboratory experiments field tests and numerical simulations |
| topic | indoor air quality thermal comfort CO<sub>2</sub> concentrations classroom preheating stratification |
| url | https://www.mdpi.com/1996-1073/14/4/952 |
| work_keys_str_mv | AT saqibjaved evaluatingtheuseofdisplacementventilationforprovidingspaceheatinginunoccupiedperiodsusinglaboratoryexperimentsfieldtestsandnumericalsimulations AT ivarrognhaugørnes evaluatingtheuseofdisplacementventilationforprovidingspaceheatinginunoccupiedperiodsusinglaboratoryexperimentsfieldtestsandnumericalsimulations AT torhelgedokka evaluatingtheuseofdisplacementventilationforprovidingspaceheatinginunoccupiedperiodsusinglaboratoryexperimentsfieldtestsandnumericalsimulations AT mariamyrup evaluatingtheuseofdisplacementventilationforprovidingspaceheatinginunoccupiedperiodsusinglaboratoryexperimentsfieldtestsandnumericalsimulations AT sverrebjørnholøs evaluatingtheuseofdisplacementventilationforprovidingspaceheatinginunoccupiedperiodsusinglaboratoryexperimentsfieldtestsandnumericalsimulations |