کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6680542 | 1428074 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Use of partial load operating conditions for latent thermal energy storage management
ترجمه فارسی عنوان
استفاده از شرایط عملکرد بار جزئی برای مدیریت ذخیرۀ انرژی حرارتی پنهان
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کلمات کلیدی
ذخیره انرژی حرارتی، حرارت نهان، مواد تغییر فاز بار جزئی، مدیریت حرارتی،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
مهندسی انرژی و فناوری های برق
چکیده انگلیسی
A proper management of thermal energy storage (TES) charging and discharging processes allows the final users to optimize the performance of TES systems. In this paper, an experimental research is carried out to study how the percentage of charge in a latent heat TES system (partial load operating conditions) influences the discharge process. Several charging and discharging processes were performed at a constant heat transfer fluid (HTF) mass flow rate of 0.5â¯kg/s and temperature of 155â¯Â°C and 105â¯Â°C, respectively. High density polyethylene (HDPE) with a total mass of 99.5â¯kg was used as phase change material (PCM) in a 0.154â¯m3 storage tank based on the shell-and-tube heat exchanger concept. Five different percentages of charge have been studied: 58 %, 73 %, 83 %, 92 %, and 97 % (baseline test). Results showed that by modifying the percentage of charge, the time required for the charging process was reduced between 97.2% and 68.8% in comparison to the baseline case. However, the energy accumulated was only reduced a maximum of 35.1% and a minimum of 5.2%, while the heat transfer rates during the first 60â¯min of discharge were reduced a maximum of 45.8% and a minimum of 6%. Therefore, partially charging the TES system not lower than 85% of its maximum energy capacity becomes a good option if the final application accepts a maximum decrease of discharging heat transfer rates of 10% if compared to the fully charged system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 216, 15 April 2018, Pages 234-242
Journal: Applied Energy - Volume 216, 15 April 2018, Pages 234-242
نویسندگان
Jaume Gasia, Alvaro de Gracia, Gerard Peiró, Simone Arena, Giorgio Cau, Luisa F. Cabeza,