Karakterisasi Material Penyimpan Kalor Laten Menggunakan Metode T-History
Abstract: The capacity of
energy storage and temperature storage has come into consideration in choosing
thermal energy storage system. Absorbed or released material either big or
small can be determined by finding the value of the specific heat (Cp) and the
latent heat fusion (HL). Available method to determine latent heat of fusion
(H), specific heat (Cp), temperature melting (Tm) and thermal conductivity (k)
are conventional calorimetry method, Differential Thermal Analysis (DTA) and
Differential Scanning Calorimetry (DSC). Measurement of physical properties of
phase change material using DTA and DSC has disadvantage due to small weight
that used for sample (1-10 mg), so that thermophysic of sample usually
different when the material is used in large quantities. In this study,
T-history method is used to determine thermophysic heat storage material.
Examination results show the match value in latent heat (Hm) of paraffin with
DSC testing results are 249.42 KJ / kg with 251 KJ / kg. The results of
calculations using the T-History for paraffin obtained at temperature Tm 52.72
to 59.9 0C; Cp of 2.54 to 3.57 KJ / Kg.K; Hm at 249.42 KJ / Kg; k of 0, 18 W /
mK. For bee-wax Tm obtained at temperatures from 52.4 to 61.79 0C; Cp of 2.65
to 3.45 KJ / Kg.K; Hm of 171 KJ / Kg; k of 0.234 W / mK. For fat cow obtained
at temperature Tm 40.82 to 44.10C; Cp of 3.19 to 4.16 KJ / Kg.K; Hm at 60.13 KJ
/ Kg; k of 0.181 W / mK. It can be concluded after examanination that Paraffin
is a good material as a phase change material (PCM) in comparison to bee-wax
and beef fat.
Penulis: Ully Muzakir, Hamdani,
Ahmad Syuhada
Kode Jurnal: jptmesindd120107
