Effect of inner decoration coating on inner surface temperatures and heat flows under air-conditioning intermittent operation

Meng, Xi; Du, Junfei; Gao, Yawen; Yu, Han

doi:10.1016/j.csite.2019.100503

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…For the thermal conductivity of the IDC, the greater the thermal conductivity, the slower the thermal response rate, and the higher the stable temperature. This phenomenon is also found by Meng et al [26], and they also claim that the thermal conductivity had the highest energy-saving efficiency. The reason is that when the thermal conductivity of IDC is small, the main construction of the wall directly affects the interior surface temperature.…”

Section: Effect On Interior Surface Temperaturesupporting

confidence: 77%

“…Hence, the interior surface temperature of the external insulation wall was more stable than the internal insulation wall, and could maintain the indoor temperature for a long time after stopping air conditioning. Reducing the thermal conductivity of the IDC was beneficial to increase the thermal response rate of the wall interior surface [26]. However, for the internal insulation wall, the insulation layer is close to the wall inside, so the influence of the thermal conductivity of the thin IDC layer on the interior surface thermal response is limited.…”

Section: Resultsmentioning

confidence: 99%

“…Research on this subject is hardly found in the literature. Only Meng et al [26] discovered that IDCs had a significant influence on the temperature and heat flow variations of the interior surface.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Study on the Dynamic Thermal Response of Building Interior Decoration Coatings during Intermittent Air-Conditioning in High U-Values Buildings in China

Chen

Zhang

2022

Energies

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Interior decorating coatings (IDCs) are the heat-transfer medium between indoor air and building walls, which mainly form the cooling load and are important in an indoor built environment. To explore the impacts of the precooling process of IDCs on indoor thermal environment of occupants during intermittent air conditioning, this paper investigated the dynamic thermal response of IDCs. Three representative coating materials were integrated to the external insulation wall and internal insulation wall, and their interior surface temperatures were experimentally tested under intermittent air conditioning operation in southern China. Moreover, a heat transfer model was established and verified to analyze the influences of IDC on the thermal response of the interior surface. During the pull-down process, the cold was accumulated in the IDC layer with small thermal diffusivity and could not be transferred into the wall inside, so that the largest temperature reduction was obtained, meaning that the indoor thermal environment could meet the setpoint in a short time. According to modelling calculations, the thick IDC with volumetric specific heat capacity less than 1 × 105 J/(m3·K) and small thermal conductivity integrated to the internal insulation wall was beneficial to increase the thermal response rate and had the better energy-saving efficiency.

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Section: Effect On Interior Surface Temperaturesupporting

confidence: 77%

Section: Resultsmentioning

confidence: 99%