TY - JOUR
T1 - Differences in temperature measurement by commercial room temperature sensors
T2 - Effects of room cooling system, loads, sensor type and position
AU - Shinoda, Jun
AU - Mylonas, Angelos
AU - Kazanci, Ongun B.
AU - Tanabe, Shin ichi
AU - Olesen, Bjarne W.
N1 - Funding Information:
This work was supported by Japan Society for the Promotion of Science [JSPS KAKENHI Grant Number JP 19J14856]. The authors thank Nico Henrik Ziersen for his help with preparing the experimental setup and Prof. David P. Wyon for his comments and help in finalising the manuscript.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/1/15
Y1 - 2021/1/15
N2 - Thermostats control the heating, ventilation and air-conditioning (HVAC) system of a building based on the temperature they measure. Integration with communication network technologies allows wireless sensors to be used as the temperature sensing component of an HVAC system, increasing the flexibility in the selection and positioning of sensors. This study compared the temperature measuring performance of nine wireless and two conventional wired temperature sensors against reference air and globe temperature sensors in a climate chamber with a two-person office setup. The influence of sensor position, room cooling system (all-air or radiant with ventilation) and cooling load (33, 61 W/m2) was studied. Sensors placed at the same position had a measurement difference of up to 1.8 K, and assumptions about the type of temperature a sensor measures (air or globe) had the largest impact on the deviation from the reference temperatures. As opposed to common assumptions, conventional wired temperature sensors measured closer to globe temperature sensors and could be a possible indicator for the operative temperature. When the load settings were high, measurements in radiant system cases had smaller deviations from the reference sensors compared with all-air systems, due to the chilled surface compensating for the radiation from the loads.
AB - Thermostats control the heating, ventilation and air-conditioning (HVAC) system of a building based on the temperature they measure. Integration with communication network technologies allows wireless sensors to be used as the temperature sensing component of an HVAC system, increasing the flexibility in the selection and positioning of sensors. This study compared the temperature measuring performance of nine wireless and two conventional wired temperature sensors against reference air and globe temperature sensors in a climate chamber with a two-person office setup. The influence of sensor position, room cooling system (all-air or radiant with ventilation) and cooling load (33, 61 W/m2) was studied. Sensors placed at the same position had a measurement difference of up to 1.8 K, and assumptions about the type of temperature a sensor measures (air or globe) had the largest impact on the deviation from the reference temperatures. As opposed to common assumptions, conventional wired temperature sensors measured closer to globe temperature sensors and could be a possible indicator for the operative temperature. When the load settings were high, measurements in radiant system cases had smaller deviations from the reference sensors compared with all-air systems, due to the chilled surface compensating for the radiation from the loads.
KW - All-air system
KW - Building management system
KW - Radiant cooling
KW - Thermostat
KW - Wired temperature sensor
KW - Wireless temperature sensor
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U2 - 10.1016/j.enbuild.2020.110630
DO - 10.1016/j.enbuild.2020.110630
M3 - Article
AN - SCOPUS:85097480299
SN - 0378-7788
VL - 231
JO - Energy and Buildings
JF - Energy and Buildings
M1 - 110630
ER -