S. Vongbunyong. Interaction analysis investigations of multiple supply duct split-type air-conditioning units in an open space. (). King Mongkut's University of Technology North Bangkok. Central Library. : , 2018.
Interaction analysis investigations of multiple supply duct split-type air-conditioning units in an open space
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