Optimal supply air temperature with respect to energy use in a variable air volume system
(2004) In Energy and Buildings 36(3). p.205-218- Abstract
- In a variable air volume (VAV) system with 100% outdoor air, the cooling need in the building is satisfied with a certain air flow at a certain supply air temperature. To minimize the system energy use, an optimal supply air temperature can be set dependent on the load, specific fan power (SFP), chiller coefficient of performance, outdoor temperature and the outdoor relative humidity. The theory for an optimal supply air temperature is presented and the heating, ventilation and air-conditioning (HVAC) energy use is calculated depending on supply air temperature control strategy, average U-value of the building envelope and two outdoor climates. The analyses show that controlling the supply air temperature optimally results in a... (More)
- In a variable air volume (VAV) system with 100% outdoor air, the cooling need in the building is satisfied with a certain air flow at a certain supply air temperature. To minimize the system energy use, an optimal supply air temperature can be set dependent on the load, specific fan power (SFP), chiller coefficient of performance, outdoor temperature and the outdoor relative humidity. The theory for an optimal supply air temperature is presented and the heating, ventilation and air-conditioning (HVAC) energy use is calculated depending on supply air temperature control strategy, average U-value of the building envelope and two outdoor climates. The analyses show that controlling the supply air temperature optimally results in a significantly lower HVAC energy use than with a constant supply air temperature. The optimal average U-value of the building envelope is in practise mostly zero. (C) 2003 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/281663
- author
- Engdahl, Fredrik LU and Johansson, Dennis LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- supply air temperature, heating, ventilation and air-conditioning, variable air volume system
- in
- Energy and Buildings
- volume
- 36
- issue
- 3
- pages
- 205 - 218
- publisher
- Elsevier
- external identifiers
-
- wos:000220762100001
- scopus:1542742127
- ISSN
- 1872-6178
- DOI
- 10.1016/j.enbuild.2003.09.007
- language
- English
- LU publication?
- yes
- id
- 07a20de5-96ea-44e6-a7f8-b7fff2a20328 (old id 281663)
- date added to LUP
- 2016-04-01 12:25:02
- date last changed
- 2022-02-18 22:11:26
@article{07a20de5-96ea-44e6-a7f8-b7fff2a20328, abstract = {{In a variable air volume (VAV) system with 100% outdoor air, the cooling need in the building is satisfied with a certain air flow at a certain supply air temperature. To minimize the system energy use, an optimal supply air temperature can be set dependent on the load, specific fan power (SFP), chiller coefficient of performance, outdoor temperature and the outdoor relative humidity. The theory for an optimal supply air temperature is presented and the heating, ventilation and air-conditioning (HVAC) energy use is calculated depending on supply air temperature control strategy, average U-value of the building envelope and two outdoor climates. The analyses show that controlling the supply air temperature optimally results in a significantly lower HVAC energy use than with a constant supply air temperature. The optimal average U-value of the building envelope is in practise mostly zero. (C) 2003 Elsevier B.V. All rights reserved.}}, author = {{Engdahl, Fredrik and Johansson, Dennis}}, issn = {{1872-6178}}, keywords = {{supply air temperature; heating; ventilation and air-conditioning; variable air volume system}}, language = {{eng}}, number = {{3}}, pages = {{205--218}}, publisher = {{Elsevier}}, series = {{Energy and Buildings}}, title = {{Optimal supply air temperature with respect to energy use in a variable air volume system}}, url = {{http://dx.doi.org/10.1016/j.enbuild.2003.09.007}}, doi = {{10.1016/j.enbuild.2003.09.007}}, volume = {{36}}, year = {{2004}}, }