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Warming impact on energy use of HVAC system in buildings of different thermal qualities and in different climates
Qatar University, Mechanical & Industrial Engineering Department, Doha.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water. Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Qatar University, Mechanical & Industrial Engineering Department, Doha.
McGill University, Department of Mining Metals and Materials Engineering.
2014 (English)In: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 81, p. 106-111Article in journal (Refereed) Published
Abstract [en]

In order to combat climate change, energy use in the building must be further reduced. Heating ventilation and air conditioning (HVAC) systems in residential buildings account for considerable fraction of global energy consumption. The potential contribution the domestic sector can make in reducing energy consumption is recognized worldwide.The driving energy of HVACs depends on the thermal quality of the building envelope (TQBE) and outside temperature. Definitely, building regulations are changing with the time toward reduce the thermal loads of buildings. However, most of the existing residential buildings were built to lower TQBE. For instant, 72% of residential dwellings in the 15-EU were built before 1972.To investigate the impact of warming on driving energy of HVACs of a residential building a computer model was developed. Three climate categories/cities were considered, i.e. Stockholm (cold), Istanbul (mild), and Doha (hot). In each city, two buildings were modeled: one was assumed to be built according to the current local buildings regulations (standard TQBE), while the anther was built to lower TQBE. The simulations were run for present and future (in 2050) outdoor designing conditions.The calculations show that the impact of the warming on annual driving energy of HVACs (reduction or increase) depends very much on the climate category and on the TQBE. Based on the climate and TQBE, the change in annual HVACs energy varies from −7.4% (in cold climate) to 12.7% (in hot climate). In mild climate, it was shown that the warming does not have significant impact on annual HVACs energy. Improving the TQBE can mitigate the impact of the warming.

Place, publisher, year, edition, pages
2014. Vol. 81, p. 106-111
National Category
Water Engineering Fluid Mechanics and Acoustics
Research subject
Water Resources Engineering; Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-7312DOI: 10.1016/j.enconman.2014.02.001Local ID: 5a9075ac-52f5-4c77-aea6-45e761f82dc1OAI: oai:DiVA.org:ltu-7312DiVA: diva2:980201
Note

Validerad; 2014; 20140304 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-02-15Bibliographically approved

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