My research paper pressentation

1. Presented By :
PARVEZ ALAM
M.Tech (pro.)
Deptt. of Mechanical Engineering
GLA University, Mathura
“Characterization of nano-particles
embedded Phase Change Materials
in TES ”
ICMPC-2020
21-23th February 2020, GLA University,
Mathura, India

2.  Introduction
 Process flow in a TES
 Experimental Methodology
 Experimental Setup
 Preparation process
 Results and discussions
 Conclusion
 References
CONTENTS

3. THERMAL ENERGY STORAGE - WHY DO WE NEED IT ?
 Energy demands vary on daily, weekly and seasonal bases. TES
is helpful for balancing between the supply and demand of
energy.
 Thermal energy storage (TES) is defined as the temporary
holding of thermal energy in the form of hot or cold substances
for later utilization.
 Increase system reliability which reduces the peak of energy
generation.
 Reduction in costs of generation.

4.  In thermal energy storage process heat energy is stored and utilizes
this energy for other beneficial works. This process is divided into
two main types which are sensible heat storage and latent heat
storage.
INTRODUCTION

5.  The temperature of thermal energy storage in sensible heat type is
changed to create new energies and stored them like in brine, soil,
water, etc. But in Latent TES systems, the energy phase
transformation can be stored and utilize later like: solid to liquid
(heat), liquid to solid.
 In this experiment, the latent thermal energy systems should
consider for energy stored for melting and recovered at the
freezing time of PCM usage.
 Basically, the main component of TES is phase change material
(PCM), which is classified into phase change process like solid to
liquid; solid to solid; liquid to gas.
 Although PCMs have these desirable properties, they still have
some drawbacks which are low thermal conductivity (lead), and
rate of heat storage and extraction at the time of melting and
solidification process. To overcome those drawbacks, using nano-
materials which can be effective enhancements should be done.
Contd…

6. PROCESS FLOW IN A TES
Excess
Heat/Cold Charging Storing Discharging

7.  Materials selection and preparation of nano-enhanced
PCM composites:
 Materials selection
 Preparation of NPCM composites
 Material property characterization:
 SEM analysis
 FT-IR spectroscopy
 Particle size/Zeta Potential Analyzer
 Measurement of thermal physical properties
EXPERIMENTAL METHODOLOGY

8.  Selected PCM:
Paraffin Wax (melting point: 52–58 °C)
 Selected Nano-materials:
Graphene and Carbon Nano-tube (CNT)
(Graphene has a thickness of 4–7 nm and plane diameter of 80 ⁄ 80 um and CNT
with a length of 10um and diameter of 11 nm)
 Preparation of sample: 3 sample prepared
a) Pure PCM
b) PCM and Graphene
c) PCM and CNT
EXPERIMENTAL SETUP

9. Graphene
CNT
PCM

10.  At first, the paraffin wax was heated in a water bath at 70 0C.
 After they were dissolved then additives were added and mixed
with liquid paraffin PCM with different mass fractions of 0.5, 1.0,
and 1.5 wt% respectively.
 A homogeneous mixture of paraffin and nanomaterials was
obtained after stirring at a rate of 710 rev/min for 38 min. and also
gives ultrasonic vibration for the next duration to guarantee
complete mixing.
 Finally, liquid mixtures were cooled to room temperature.
 After sample preparation it was characterized in Materials
Research Centre (MNIT, JAIPUR).
PREPARATION OF PCM COMPOSITES LOADING
NANO-MATERIALS:

11. The final sample of nano-enhanced phase change material (NPCMs)

12.  Micro morphology analysis:
RESULTS AND DISCUSSIONS
FESEM IMAGING: PCM+GRAPHENE

13. Contd…
FESEM IMAGING: PCM+CNT

14.  Both of these nanomaterials
composite PCM images show
that the additives are uniformly
distributed in based PCM and
these additives help in
enhancing the higher thermal
conductivities as compare to
pure paraffin(PCM).
 From the SEM images, it was
also observed that both
additives got arranged in the
same direction as incorporated
in the pure paraffin and settled
in holes of pure PCM
(paraffin).
Contd…

15.  TR-FTIR analysis:
Contd…
Pure PCM

16. Contd…
PCM + Graphene

17. Contd…
PCM + CNT

18.  Chemical stability of
composite PCM was observed
by Fourier Transform Infrared
(FTIR) spectroscopy.
 The peaks of these samples
are identical indicating the
good stability of NPCMs.
 Therefore, good thermal and
chemical stability of both
PCM and nano-materials
could reinforce the long-term
use for thermal energy
storage.
Contd…

19.  Thermal conductive properties:
Contd…
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0 0.5 1 1.5
Thermalconductivity(wm-1k-1)
Mass Fraction (%)
PCM
PCM+CNT
PCM+Graphene

20.  The thermal conductivity of the
samples was measured by the
TCi thermal conductivity
analyzer (C-Therm Technologies
Ltd.) at room temperature 20 0C.
 The thermal conductivity of
composite PMCs continuously
increased with the increasing
quantity of additives.
 The graphene and CNT
nanomaterial for the addition of
1.5 wt% with pure PCM then
thermal conductivity becomes
0.77 and 0.62 W/mK, which is
1.96 and 1.57 times respectively
higher than that of pure paraffin.
Contd…

21. In this work, the thermal energy storage has been proposed and the selection
of PCM (Paraffin), the effect of the addition of nanoparticles (Graphene
and CNT) on the thermo-physical properties and other chemical properties
of PCM are future outlook and challenges in this field.
Furthermore, the major conclusions include the following parts:
 To improve the overall thermal conductivity of PCM, a sufficient amount
of nanoparticles is required.
 The thermal conductivity was greatly improved when graphene was added
into PCM when compared to CNT-based nanomaterials.
 As compared to metal and metal oxides nanoparticles, the thermal
conductivity of nanocomposite PCM is more significant to Carbon-based
nanomaterials at different concentrations.
 With the increase of nanoparticle concentration, the density of PCM
increases based on the mixture prepared.
 The durability of PCM through various cycles of the changing phase is also
a vital aspect to consider.
CONCLUSION

22. REFERENCES
1. A. Karaipekli, A. Sarı, and K. Kaygusuz, “Thermal conductivity improvement of stearic
acid using expanded graphite and carbon fiber for energy storage applications,”
Renewable Energy, 2007 vol. 32, pp. 2201–2210.
2. G. Alva, Y. Lin, and G. Fang, “An overview of thermal energy storage systems,” Energy,
2018 vol. 144 , pp. 341–378.
3. K. Y. Leong, M. Rosdzimin, A. Rahman, and B. A. Gurunathan, “Nano-enhanced phase
change materials : A review of thermo-physical properties , applications and challenges,”
J. Energy Storage, 2018 vol. 21, pp. 18–31.
4. S. Yu, S. Jeong, O. Chung, and S. Kim, “Solar Energy Materials & Solar Cells Bio-
based PCM / carbon nanomaterials composites with enhanced thermal conductivity,”
Sol. Energy Mater. Sol. Cells 2014 vol. 120, pp. 549–554.
5. L. Xia, P. Zhang, and R. Z. Wang, “Preparation and thermal characterization of
expanded graphite / paraffin composite phase change material,” Carbon N. Y., 2010 vol.
48, no. 9, pp. 2538–2548.
6. H. Babaei, P. Keblinski, and J. M. Khodadadi, “International Journal of Heat and Mass
Transfer Thermal conductivity enhancement of paraffins by increasing the alignment of
molecules through adding CNT / graphene q,” HEAT MASS Transf., 2013 vol. 58, no.
1–2, pp. 209–216.

23. Parvez Alam
Contact no. : 7417820165
Gmail: alamparvez752@gmail.com