Thermal performance based optimization of an office wall containing PCM under intermittent cooling operation

被引：107
作者：
Tuncbilek, Ekrem [1 ]
Arici, Muslum [1 ]
Krajcik, Michal [2 ]
Nizetic, Sandro [3 ]
Karabay, Hasan [1 ]
机构：
[1] Kocaeli Univ, Engn Fac, Mech Engn Dept, Umuttepe Campus, TR-41001 Kocaeli, Turkey
[2] Slovak Univ Technol Bratislava, Fac Civil Engn, Radlinskeho 11, Bratislava 81005, Slovakia
[3] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, LTEF Lab Thermodynam & Energy Efficiency, Rudjera Boskov 32, Split 21000, Croatia
来源：
APPLIED THERMAL ENGINEERING | 2020年 / 179卷
关键词：
Intermittent cooling; Phase change material; Energy savings; Office; Optimum melting temperature; Optimum layer thickness; Energy efficiency; PHASE-CHANGE MATERIAL; OPTIMUM INSULATION THICKNESS; RESIDENTIAL BUILDINGS; ENERGY-STORAGE; HEAT-STORAGE; ENVELOPE; BEHAVIOR; SYSTEM; BRICK;
D O I：
10.1016/j.applthermaleng.2020.115750
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An optimization study was conducted for an external office wall containing a phase change material (PCM) layer under intermittent cooling operation. The design parameters such as location, PCM layer thickness and phase transition temperature were optimized to maximize energy savings by efficient use of latent heat. Moreover, simulations were performed for a representative week of each summer month to evaluate the effect of incorporating PCM into the wall on thermal comfort and air conditioner operation. PCM located near the exterior did not save energy and might even increase the energy demand. It is advisable to locate the PCM layer near the interior. The optimum phase transition temperature was 25 degrees C irrespective of the PCM layer thickness, which equaled the upper temperature setpoint. M this phase transition temperature, the room and wall surface temperature was reduced before working times and during lunch breaks which enabled reducing the number of operation cycles of the air conditioner. Also, energy savings of up to 12.8% were attained for the PCM layer thickness of 23 mm as compared to a wall without any PCM. Any phase transition temperature above 26 degrees C negatively affected the energy savings due to the adverse effect of latent heat usage.
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页数：12
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