Firman La Ode Mohammad, Rahmalina Dwi, Rahman Reza Abdu
Department of Mechanical Engineering, Faculty of Engineering, Universitas Pancasila, Srengseng Sawah, Jagakarsa, DKI, Jakarta 12640, Indonesia.
HardwareX. 2023 Dec 2;16:e00496. doi: 10.1016/j.ohx.2023.e00496. eCollection 2023 Dec.
Estimating the total thermal capacity for phase change material (PCM) as heat storage material is extremely important to set the proper operational parameter of the latent storage tank (LST) unit. However, estimating the total thermal capacity for solid-liquid PCM is relatively complex due to temperature-dependent properties for each phase. Thus, predicting the state of charge (SoC) indicator for the LST unit is technically complex. The common approach is taken by estimating the heat of fusion during the melting process and monitoring the working fluid temperature, which makes the SoC estimation less accurate. The present project proposes a reliable method with an affordable apparatus to estimate the total thermal capacity simultaneously based on the temperature of low-temperature PCM. Moreover, sensible heating during phase transition is also estimated precisely based on the energy balance at a given temperature. The developed apparatus employs widely available components at an affordable cost which is possible for further customization. Validation and characterization are done comprehensibly by comparing the measurement from differential scanning calorimetry and previous studies. The results indicate a suitable estimation for estimating the solid-liquid heat capacity, including partial heat capacity and latent heat of fusion.
将相变材料（PCM）作为储热材料时，估算其总热容量对于设定潜热储存罐（LST）单元的合适运行参数极为重要。然而，由于各相的性质随温度变化，估算固 - 液PCM的总热容量相对复杂。因此，预测LST单元的充电状态（SoC）指标在技术上很复杂。常见的方法是估算熔化过程中的熔化热并监测工作流体温度，但这使得SoC估算不够准确。本项目提出了一种可靠的方法，使用价格合理的设备，基于低温PCM的温度同时估算总热容量。此外，还基于给定温度下的能量平衡精确估算相变过程中的显热。所开发的设备采用广泛可用的组件，成本低廉，且可进一步定制。通过将测量结果与差示扫描量热法及先前研究进行比较，全面完成了验证和特性描述。结果表明，对于估算固 - 液热容量，包括部分热容量和熔化潜热，该方法具有适用性。
