کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6680160 1428069 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design and functionality of a segmented heat-storage prototype utilizing stable supercooling of sodium acetate trihydrate in a solar heating system
ترجمه فارسی عنوان
طراحی و قابلیت استفاده از یک نمونه اولیه ذخیره سازی قطعه ای با استفاده از بازدارندگی پایدار تر هیدرات استات سدیم در یک سیستم گرمایش خورشیدی
کلمات کلیدی
سیستم گرمایش خورشیدی، نمونه اولیه ذخیره سازی حرارت، مواد تغییر فاز سدیم استات تری هیدرات، سوپراکولینگ پایدار،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
A solar heating system with 22.4 m2 of solar collectors, a heat storage prototype consisting of four 200 kg phase-change material (PCM) storage units, and a 735 L water tank was designed to improve solar heat supply in single-family houses. The PCM storage utilized stable supercooling of sodium acetate trihydrate composites to conserve the latent heat of fusion for long-term heat storage. A control strategy directed heat from a solar collector array to either the PCM storage or a water buffer storage. Several PCM units had to be charged in parallel when the solar collector output peaked at 16 kW. A single unit was charged with 27.4 kWh of heat within four hours on a sunny day, and the PCM temperature increased from 20 °C to 80 °C. The sensible heat from a single PCM unit was transferred to the water tank starting with about 32 kW of thermal power after it had fully melted at 80 °C. A mechanical seed crystal injection device was used to initialize the crystallisation of the sodium acetate trihydrate after it had supercooled to room temperature. The unit discharge during solidification peaked at 8 kW. Reliable supercooling was achieved in three of the four units. About 80% of latent heat of fusion was transferred from PCM units after solidification of supercooled sodium acetate trihydrate to the water tank within 5 h. Functionality tests with practical operation conditions on the novel, modular heat-storage configuration showed its applicability for domestic hot water supply and space heating.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 221, 1 July 2018, Pages 522-534
نویسندگان
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