Heat accumulator - Chikunetsuki (English spelling)

Japanese: 蓄熱器 - ちくねつき(英語表記)heat accumulator
Heat accumulator - Chikunetsuki (English spelling)
A general term for equipment that temporarily stores energy in the form of thermal energy. Because the conversion efficiency is low when converting thermal energy back into the original energy, it is usually used to store surplus thermal energy. It is used when there is a seasonal or time-of-day difference between the time thermal energy is generated and consumed, when leveling out the operation of thermal energy equipment that involves additional fluctuations, and when utilizing waste heat, such as in regenerators for thermal storage heat exchangers and refrigerators. Thermal storage methods vary depending on the heat storage material (solid, liquid, gas) and the heat used (sensible heat, latent heat), but the most efficient thermal storage methods are those that use the latent heat of evaporation of water or the latent heat of melting of molten salt or ice.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
エネルギーを熱エネルギーの形で一時貯蔵する機器の総称。熱エネルギーから元のエネルギーへ再変換する際の変換効率が低いため,通常は余剰の熱エネルギーを貯蔵するのに使用する。熱エネルギーの発生時間と消費時間の間に季節や時間帯規模のズレがある場合や,付加変動を伴う熱エネルギー機器の運転の平準化を行う場合,さらに,蓄熱式熱交換器や冷凍機における再生器などのように廃熱を利用する場合などに使用する。蓄熱方式は,蓄熱材 (固体,液体,気体) および利用する熱 (顕熱,潜熱) によりさまざまであるが,蓄熱効率が高いのは水の蒸発潜熱や溶融塩・氷の融解潜熱を利用する方式である。

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