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Khosravi Bakhtiari, Hossein
Publications (2 of 2) Show all publications
Khosravi Bakhtiari, H., Akander, J. & Cehlin, M. (2019). Evaluation of Thermal Comfort in a Historic Building Refurbished to an Office Building with Modernized HVAC Systems. Advances in Building Energy Research
Open this publication in new window or tab >>Evaluation of Thermal Comfort in a Historic Building Refurbished to an Office Building with Modernized HVAC Systems
2019 (English)In: Advances in Building Energy Research, ISSN 1751-2549, E-ISSN 1756-2201Article in journal (Refereed) Epub ahead of print
Abstract [en]

Envelopes with low thermal performance are common characteristics in European historic buildings, causing higher energy demand and insufficient thermal comfort. This paper presents the results of a study on indoor environmental quality (IEQ), with special focus on thermal comfort, in the historic City Hall of Gävle, Sweden, now used as an office building. There are two modern heat recovery ventilation systems with displacement ventilation supply devices. The district heating network heats the building via pre-heat supply air and radiators. Summer cooling comes from electric heat pump ejecting heat into the exhaust ventilation air. A building management system (BMS) controls the heating, ventilation and air-conditioning (HVAC) equipment. The methodology included on-site measurements, BMS data logging and evaluating the occupants’ perception of a summer and a winter period indoor environment using a standardized questionnaire. In conclusion, indoor environmental quality in this historic building is unsatisfactory. Stuffy air, too high, too low and varying room temperatures, lighting problems and noise are constant issues. Although it is equipped with modern ventilation systems, there are still possibilities for improving thermal comfort by improved control strategies, since upgrading the building’s envelope is not allowed according to the Swedish Building Regulations in historic buildings with heritage value.

Keywords
Thermal comfort, historic building, HVAC
National Category
Energy Engineering
Identifiers
urn:nbn:se:hig:diva-29442 (URN)10.1080/17512549.2019.1604428 (DOI)2-s2.0-85064678798 (Scopus ID)
Funder
Knowledge Foundation, 20150133
Available from: 2019-04-05 Created: 2019-04-05 Last updated: 2019-08-16Bibliographically approved
Khosravi Bakhtiari, H., Cehlin, M. & Akander, J. (2018). Thermal Comfort in Office Rooms in a Historic Building with Modernized HVAC Systems. In: Kiao Inthavong,Chi Pok Cheung, Guan Yeoh, Jiyuan Tu (Ed.), Proceedings of the 4th International Conference On Building Energy & Environment, COBEE 2018: RMIT University, Melbourne, Australia, Feb 5-9th 2018. Paper presented at 4th International Conference On Building Energy & Environment, COBEE 2018, 5-9 February 2018, Melbourne, Australia (pp. 683-688). Melbourne: Conference On Building Energy & Environment, Article ID 230.
Open this publication in new window or tab >>Thermal Comfort in Office Rooms in a Historic Building with Modernized HVAC Systems
2018 (English)In: Proceedings of the 4th International Conference On Building Energy & Environment, COBEE 2018: RMIT University, Melbourne, Australia, Feb 5-9th 2018 / [ed] Kiao Inthavong,Chi Pok Cheung, Guan Yeoh, Jiyuan Tu, Melbourne: Conference On Building Energy & Environment , 2018, p. 683-688, article id 230Conference paper, Published paper (Refereed)
Abstract [en]

SUMMARY

Envelopes with low thermal performance are common characteristics in European historic buildings, leading to higher energy demand and insufficient thermal comfort. This paper presents the results of a study on thermal comfort in the historic office building of City Hall in Gävle, Sweden. It is equipped with two modern heat recovery ventilation systems with displacement ventilation supply devices in offices. District heating network heats the building via pre-heat supply air and radiators. Summer cooling comes from electric heat pump, rejecting heat into the exhaust ventilation air. A building management system controls HVAC equipment. Methodology includes on-site measurements, data logging on management system and evaluating the occupants’ perception of a summer and a winter period indoor environment using a standardized questionnaire. In conclusion, thermal comfort in this historic building is poor although it is equipped with modern ventilation systems and there should be possibilities for improving comfort, by improved control strategies.

Keywords — Historic Buildings, On-site Measurements, Standardized Questionnaire, Thermal Comfort

Place, publisher, year, edition, pages
Melbourne: Conference On Building Energy & Environment, 2018
National Category
Energy Systems
Identifiers
urn:nbn:se:hig:diva-26550 (URN)978-0-646-98213-7 (ISBN)
Conference
4th International Conference On Building Energy & Environment, COBEE 2018, 5-9 February 2018, Melbourne, Australia
Available from: 2018-05-07 Created: 2018-05-07 Last updated: 2018-06-05Bibliographically approved
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