Characterizing phase change materials using the T-History method: On the factors influencing the accuracy and precision of the enthalpy-temperature curve
Journal article, 2018

While research on using the latent heat of so called phase change materials (PCMs) for thermal energy storage has gained increasing interest in the last decade, the measurement of its thermal properties are still subject to research. The T-History method has been frequently used by researchers to measure the enthalpy–temperature curve of PCMs but the factors influencing its accuracy and precision have rarely been discussed. This work provides a systematic experimental study of an organic PCM based on different insulated sample holders. It is first shown that the data evaluation method has to be adjusted against noise to improve both accuracy and precision for all experimental setups. The results moreover show that neglecting the insulation thermal mass in the experimental setup leads to systematic errors in the enthalpy results due to oversimplification of the mathematical model. This confirms a previous numerical study by the authors. It is recommended that either the mathematical model or the experimental setup are adjusted in future work to decrease this error. Until then it is generally recommended to use sample holders with a high ratio between the thermal mass of the PCM to the insulated sample holder. This is further supported by a measurement uncertainty analysis via Monte Carlo simulations.

Thermal Analysis

Phase Change Materials

T-History

Calorimetry

Author

Pepe Tan

Chalmers, Architecture and Civil Engineering, Building Technology

Michael Brütting

Bavarian Center for Applied Energy Research (ZAE Bayern)

Stephan Vidi

Bavarian Center for Applied Energy Research (ZAE Bayern)

Hans-Peter Ebert

Bavarian Center for Applied Energy Research (ZAE Bayern)

Pär Johansson

Chalmers, Architecture and Civil Engineering, Building Technology

Angela Sasic Kalagasidis

Chalmers, Architecture and Civil Engineering, Building Technology

Thermochimica Acta

0040-6031 (ISSN)

Vol. 666 212-228

Evaluation and optimization of a heat storage with phase change materials for better energy management in buildings - field studies, modeling and laboratory experiments

Swedish Energy Agency, 2015-01-01 -- 2017-12-31.

Demonstration plant for cold storage in phase change materials

Swedish Environmental Protection Agency, 2017-01-01 -- 2018-06-30.

Subject Categories

Energy Engineering

Other Materials Engineering

Energy Systems

Building Technologies

Areas of Advance

Energy

DOI

10.1016/j.tca.2018.07.004

More information

Latest update

8/31/2018