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While designing Phase Change Materials (PCMs) for energy storage applications, several critical factors must be taken into consideration to ensure efficiency, safety, and performance. PCMs are substances that absorb or release a significant amount of latent heat during their phase transition, typically from solid to liquid or vice versa. Their utility in thermal energy storage depends largely on their thermophysical, chemical, and operational properties. First and foremost, melting temperature is a primary consideration. The PCM must have a phase transition temperature that matches the intended application's temperature range. For example, for building thermal management, PCMs with melting points around human comfort levels (20–25°C) are preferred, while in solar thermal power plants, higher melting points are suitable. The latent heat of fusion is another critical factor. A PCM _____ ______ _________ __________ _____ ___ _________ _____ _________ ______ _____.
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