Interaction analysis investigations of multiple supply duct split-type air-conditioning units in an open space

Name: W. Widsonkun

Organization : King Mongkut's University of Technology Thonburi. Institute of Fleld robotics (FIBO)

Name: D. Woradechjumroen

Organization : Sripatum University. School of Engineering

Email : denchai.wora@gmail.com, denchai.wo@spu.ac.th

Name: S. Vongbunyong

Organization : King Mongkut's University of Technology Thonburi. Institute of Fleld robotics (FIBO)

keyword: Split-type air-conditioning

ThaSH: Air conditioning -- Equipment and supplies

ThaSH: Ventilation

ThaSH: Detectors

Abstract: Oversizing has been seldom concerning in Thailand However, oversizing causes short-term operations of an air-conditioning (AC) unit and excessive power consumptions. In addition, multiple operations of oversized AC units can be faulty operations when they are used to serve in an open space area because interaction among AC units are not considered before installations. This paper collects data operations of the multiple supply duct split-type air-conditioning (SAC) units used in an open space from additional sensors installed in zone and return temperature. Significant wireless sensors are added for measuring temperature effect among a interaction area between two SAC units. To measure the system variation caused by system interaction, runtime fraction (RTF) is used to quantify the compressor runtime ratio which equals to a stage-on time operation over the cycle time at an AC design condition. The results show that one of the four SAC units performs under-sizing instead of oversizing performance because it runs continuously without off cycling. To diagnose this issue, interactions between zone and return temperature are quantified in terms of correlation coefficient, which demonstrates that this SAC results in higher oversizing of the rest SAC. units. This interaction analysis can be further used to design a soft-repair algorithm to reduce oversizing effect of the multiple SAC operations.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2018

Modified: 2025-06-30

Issued: 2025-06-30

BibliograpyCitation : In Thammasat University Faculty of Engineering. The 9th TSME International Conference on Mechanical Engineering 2018 (TSME-ICoME9) (pp.614-620) Pathum Thani : Thammasat University

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