کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11023541 1701271 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Two types of composite phase change panels containing a ternary hydrated salt mixture for use in building envelope and ventilation system
ترجمه فارسی عنوان
دو نوع پانل تغییر فاز کامپوزیت حاوی مخلوط نمک هیدراته سه جزء برای استفاده در ساختمان پاکت و سیستم تهویه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
Herein the co-integration of two composite phase change materials into building envelopes and ventilation systems was first explored for reducing indoor temperature fluctuation. Specifically, a ternary mixture consisting CaCl2·6H2O, NH4Cl and SrCl2·6H2O was combined with expanded perlite and expanded graphite to prepare two composites with different thermal conductivities, followed by fabricating them into two kinds of panels. A test room composed of a main room and a ventilation system was constructed, in which the expanded perlite-based composite panels were placed at the insides of the four walls, floor and roof of the main room, while the other expanded graphite-based composite ones were incorporated into the ventilation system. It is shown that the ternary mixture consisting of 95 wt% CaCl2·6H2O-4 wt% NH4Cl-1 wt% SrCl2·6H2O exhibits a melting point of 23.46 °C, lower than that of CaCl2·6H2O, making it more suitable for use in buildings. Its melting enthalpy is as high as 173.2 kJ/kg. The thermal conductivities of the expanded perlite- and expanded graphite-based composites have been measured to be 0.1170 and 9.720 W/(m·K), respectively. Compared with the room equipped with the expanded perlite-based composite panels at the envelopes, the one containing the two composite phase change panels at the envelopes and the ventilation system simultaneously exhibits a reduced indoor temperature fluctuation (22.29-28.69 °C) and a higher frequency of thermal comfort (78.3%). This work paves the way to the exploitation of hydrated salts as well as the applications of the phase change composites with different thermal conductivity in buildings envelopes and ventilation systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 177, 1 December 2018, Pages 306-314
نویسندگان
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