Effect of supply air temperature on air distribution in a room with radiant heating and mechanical ventilation

  • Xiaozhou Wu
  • , Lei Fang
  • , Bjarne W. Olesen
  • , Jianing Zhao
  • , Fenghao Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The present study focused on the effect of supply air temperature on air distribution in a room with floor heating (FH) or ceiling heating (CH) and mixing ventilation (MV) or displacement ventilation (DV). The vertical distribution of air temperature and velocity in the occupied zone and the horizontal distribution of containment concentration in the breathing zone were measured as the supply air temperature ranged from 15.0°C(59°F) to l9.0°C(66.2°F). The results showed that the vertical air temperature differences were less than 0.3°C (32.5°F) with FH+MV or CH+MV and between 1.9°C (35.4°F) and 4.2°C (39.6°F) with FH+DVor CH+DV. The turbulence intensity variedfrom 12.5% to 15.5% with FH+MV or CH+MV and from 6.0% to 10.8% with FH+D Vor CH+D V. The air-distribution effectiveness was close to 1.0 with FH+MV or CH+MV and between 1.06 and 1.16 with FH+DV or CH+D V. The results in this paper are relevant to the design and control of the hybrid systems with radiant heating systems and mechanical ventilation systems.

Original languageEnglish
Title of host publicationASHRAE Transactions
PublisherAmerican Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
Pages120-128
Number of pages9
ISBN (Electronic)9781939200655
StatePublished - 2017
Event2017 ASHRAE Winter Conference - Las Vegas, United States
Duration: 28 Jan 20171 Feb 2017

Publication series

NameASHRAE Transactions
Volume123
ISSN (Print)0001-2505

Conference

Conference2017 ASHRAE Winter Conference
Country/TerritoryUnited States
CityLas Vegas
Period28/01/171/02/17

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