Impacts on building return water temperature in district cooling systems

Gang Wang, Bin Zheng, Mingsheng Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A high temperature differential between supply and return water is most cost effective in district cooling systems. The chilled water supply temperature relies on central plant operation while the chilled water return temperature mainly depends on cooling coil performance of air handling units (AHU) at consumers. Many factors affect the AHU cooling coil performance at the consumers, such as cooling coil size, chilled water supply temperature, AHU supply air temperature, space cooling load, outside airflow and conditions, cooling coil fouling condition and cooling coil control valves types. The AHU chilled water return temperature may deviate from its design valve under off-design conditions. The common method to maintain the required consumer chilled water return temperature is to install a bypass bridge between the chilled water supply and return at consumer connections. This paper studies the impact of these factors on the AHU chilled return water temperature and finally develops the improved chilled water return temperature control method.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME International Solar Energy Conference, ISEC2006
Number of pages8
StatePublished - Nov 19 2007
Externally publishedYes
Event2006 International Solar Energy Conference, ISEC2006 - Denver, CO, United States
Duration: Jul 8 2006Jul 13 2006

Publication series

NameInternational Solar Energy Conference
ISSN (Print)1546-8402


Other2006 International Solar Energy Conference, ISEC2006
Country/TerritoryUnited States
CityDenver, CO

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Space and Planetary Science


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