PCMを用いた蓄・放熱設備の設計に際しては，その設置量や相変化温度の設定により特性が大きく変化するため，使用条件に適したPCMの選定が必要である.したがつて，PCMの選定に際してはそれ自体の正確な物性値の把握が求められ，一般的には示差走査熱量計（DSC)による測定値が用いられる.本研究では，安価で簡易なPCM熱物性測定方法を提案し，実験装置を製作して実験を行うとともに，DSCによる測定結果と比較した.本実験装置による冷却と加熱過程の温度と比ェンタルピーの関係はほぼ一致し，DSCでは表現されない凝固開始時の過冷却現象の確認も可能であることから，本装置は十分な測定精度でPCMの熱物性の測定が可能であり，蓄•放熱特性を把握する上で有効な装置であることが確認できた.%The thermal characteristics of a heat storage system that uses a phase change material (PCM) as the heat storage medium depends on the quantity and temperature of the phase change. For the efficient use of the system, it is necessary to understand the thermal property of the PCM correctly, so that differential scanning calorimetry (DSC) is usually used for the measurement of the thermal characteristics of PCM. In this study, inexpensive and simple experimental equipment that can measure the thermal properties of the PCM was proposed and manufactured. Using the proposed equipment, measurement of the temperature and specific enthalpy characteristics of PCM was conducted. The experimental results were compared with those measured by DSC. The temperature and the specific enthalpy characteristics of the PCM measured by the proposed equipment showed almost the same characteristics in cooling and heating processes, and supercooling that could not be detected by DSC was also measured. It is confirmed that the proposed equipment can accurately measure the charging and discharging characteristics of the PCM, so that its availability was demonstrated.
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