Study on Temperature Stratified-thermal Energy Storage Tank Corresponding to Thermal Storage at Multiple Temperature Zones

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04729
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 23020:Architectural environment and building equipment-related
• Research Institution: Mie University
• Principal Investigator: Kitano Hiroaki 三重大学, 工学研究科, 准教授 (80293801)
• Co-Investigator(Kenkyū-buntansha): 岩田 剛 三重大学, 工学研究科, 技術専門員 (20636542)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 建築設備 / 蓄熱槽 / 温度成層型 / 実験 / モデル

Outline of Final Research Achievements

The purpose of this research is to develop a thermal energy storage system that can store and use cold and warm heat according to temperature zones and heat quantities. First, a model experiment of a temperature stratified thermal storage tank with multiple inlets and outlets in the height direction was conducted to evaluate the basic performance of the thermal storage tank. Next, a computational fluid dynamics analysis was performed to simulate multiple temperature ranges of heat storage under various conditions. Then, a mixing model was developed to predict temperature distribution in the tank. Finally, a simulation of a thermal storage air-conditioning system that uses cascading cold heat was conducted to evaluate its practical feasibility.

Free Research Field

建築環境・設備

Academic Significance and Societal Importance of the Research Achievements

本研究では，複数の温度帯の冷温熱を一つの温度成層型蓄熱槽で蓄放熱可能であることを示し，その温度分布を簡易に予測できる槽内混合モデルを開発した。このような蓄熱槽を導入することで，熱のカスケード利用時に温度帯毎の熱需給のアンバランスがある場合でも，熱の有効利用が可能となると考えられる。また，蓄熱槽内温度を簡易に予測可能となったことから，蓄熱槽の設計法の検討や蓄熱システムのシミュレーションによる性能評価が容易となり，自然エネルギーや廃熱等の高度な有効利用の促進と建築物における化石エネルギーの消費の削減が期待される。