翻訳と辞書 Words near each other ・ Phase Stretch Transform ・ Phase switch ・ Phase synchronization ・ Phase telescope ・ Phase Three ・ Phase transformation crystallography ・ Phase transition ・ Phase transitions and critical phenomena ・ Phase variation ・ Phase velocity ・ Phase VII ・ Phase vocoder ・ Phase-boundary catalysis ・ Phase-change Dual ・ Phase-change incubator ・ Phase-change material ・ Phase-change memory ・ Phase-coherent holography ・ Phase-comparison monopulse ・ Phase-contrast imaging ・ Phase-contrast X-ray imaging ・ Phase-fired controllers ・ Phase-locked loop ・ Phase-locked loop ranges ・ Phase-out of incandescent light bulbs ・ Phase-out of lightweight plastic bags ・ Phase-shift keying ・ Phase-shift mask ・ Phase-shift oscillator ・ Phase-transfer catalyst Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Phase-change material ： ウィキペディア英語版 Phase-change material A phase-change material (PCM) is a substance with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy. Heat is absorbed or released when the material changes from solid to liquid and vice versa; thus, PCMs are classified as latent heat storage (LHS) units. ==Characteristics and classification== PCMs latent heat storage can be achieved through liquid–solid, solid–liquid, solid–gas and liquid–gas phase change. However, the only phase change used for PCMs is the solid–liquid change. Liquid-gas phase changes are not practical for use as thermal storage due to the large volumes or high pressures required to store the materials when in their gas phase. Liquid–gas transitions do have a higher heat of transformation than solid–liquid transitions. Solid–solid phase changes are typically very slow and have a rather low heat of transformation. Initially, the solid–liquid PCMs behave like sensible heat storage (SHS) materials; their temperature rises as they absorb heat. Unlike conventional SHS, however, when PCMs reach the temperature at which they change phase (their melting temperature) they absorb large amounts of heat at an almost constant temperature. The PCM continues to absorb heat without a significant rise in temperature until all the material is transformed to the liquid phase. When the ambient temperature around a liquid material falls, the PCM solidifies, releasing its stored latent heat. A large number of PCMs are available in any required temperature range from −5 up to 190 °C. Within the human comfort range between 20–30 °C, some PCMs are very effective. They store 5 to 14 times more heat per unit volume than conventional storage materials such as water, masonry or rock. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phase-change material」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.