Effect of wettability of cooling surface on frosting phenomena

2019 ◽  
Vol 2019.29 (0) ◽  
pp. J401
Author(s):  
Haruka AGUI ◽  
Hidetoshi OHKUBO ◽  
Yuta SUZUKI ◽  
Takuhiro HASHIMOTO
Keyword(s):  
Cooling Surface

scholarly journals The Impacts of a Building’s Thermal Mass on the Cooling Load of a Radiant System under Various Typical Climates

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1356 ◽  
Author(s):  
Rong Hu ◽  
Gang Liu ◽  
Jianlei Niu
Keyword(s):  
Weather Conditions ◽  
Thermal Mass ◽  
Cooling Load ◽  
Radiation Heat ◽  
Combined System ◽  
Indoor Temperature ◽  
External Wall ◽  
Cooling Surface ◽  
Concrete Layer ◽  
Energy Plus

Cooling load is difficult to predict for a radiant system, because the interaction between a building’s thermal mass and radiation heat gain has not been well defined in a zone with a cooling surface. This study aims to reveal the effect of thermal mass in an external wall on the transmission load in a space with an active cooling surface. We investigated the thermal performances in a typical office building under various weather conditions by dynamic simulation with Energy-Plus. It was found that the thermal mass in the inside concrete layer had positives in terms of indoor temperature performance and energy conservation. The peak cooling load of the hydronic system decreases 28% in the proper operating state, taking into account the effect of the thermal mass in an external wall. Compared to the performances in zones with equivalent convective air systems (CASs), the peak cooling load and the accumulated load of the combined system (radiant system coupled by fresh air system) are higher by 9%–11% and 3%–4%, respectively. The effect of thermal mass is evident in a transient season with mild weather, when the relative effects are about 45% and 60%, respectively, for a building with radiant systems and a building with equivalent CASs.

402 Investigation on influence of surface roughness of cooling surface on ice structure formed by control of initial ice crystal orientation

2014 ◽  
Vol 2014.24 (0) ◽  
pp. 121-122
Author(s):  
Takahiro IKEYA ◽  
Koji MATSUMOTO ◽  
Yoshikazu TERAOKA ◽  
Kazuyoshi MATSUNAGA ◽  
Masato HONDA
Keyword(s):  
Surface Roughness ◽  
Crystal Orientation ◽  
Ice Crystal ◽  
Cooling Surface

S0805-1-2 Studies on frost layer growth and its structure on cooling surface

2009 ◽  
Vol 2009.3 (0) ◽  
pp. 187-188
Author(s):  
Tatsuya YOHIDA ◽  
Keisuke SHIOMI ◽  
Kenji YOSHIDA ◽  
Isao KATAOKA
Keyword(s):  
Layer Growth ◽  
Cooling Surface ◽  
Frost Layer

Growth Velocity and Shape of TBAB Hydrate Crystals Propagating on a Cooling Surface

2019 ◽  
Vol 2019 (0) ◽  
pp. 0019
Author(s):  
Yoshinori Tetsuka ◽  
Takateru Yoshida ◽  
Yoshikazu Teraoka
Keyword(s):  
Growth Velocity ◽  
Cooling Surface
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