Chilled water temperature set-point reset based on outdoor air temperature and its cooling energy performance in an office building

Lee, Young Jun; Hong, Sung Hyup; Lee, Jong Man; Yoon, Yeo Beom; Choi, Jong Min; Lee, Kwang Ho

doi:10.1007/s12206-022-0241-4

Title: Chilled water temperature set-point reset based on outdoor air temperature and its cooling energy performance in an office building

Journal Article · 03 March 2022 · Journal of Mechanical Science and Technology

DOI: https://doi.org/10.1007/s12206-022-0241-4 · OSTI ID:1883793

Lee, Young Jun ^[1]; Hong, Sung Hyup ^[1]; Lee, Jong Man ^[1]; Yoon, Yeo Beom ^[2]; Choi, Jong Min ^[3]; Lee, Kwang Ho ^[1]

Korea University, Seoul, (Korea, Republic of)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Hanbat National University, Daejeon (Korea, Republic of)

Here, in this study, the cooling energy performance of two strategies for controlling ChWT (chilled water temperature) are compared: the conventional control strategy of constantly fixing ChWT and the OAT (outdoor air temperature) compensation control strategy that adjusts ChWT according to the changes in OAT. OAT compensation control strategy was modeled and realized based on Appendix G of ASHRAE Standard 90.1. It was confirmed that applying OAT compensation control strategy can significantly reduce chiller energy consumption, which accounts for the largest portion of total cooling energy consumption. It was found that the difference in total cooling energy consumption between applying the conventional control of constantly fixing ChWT to 6 °C and applying the OAT compensation control was approximately 8 % and 3 % during spring (March to May) and summer (June to August), respectively. Additionally, during the fall (September–November) period, about 7 % of total cooling energy consumption could be saved.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: Korea Government (MOTIE); Korea University; USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1883793

Journal Information:: Journal of Mechanical Science and Technology, Journal Name: Journal of Mechanical Science and Technology Journal Issue: 3 Vol. 36; ISSN 1738-494X

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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