2. What are nano fluids?
Nanofluids are a new class of fluids engineered by
dispersing nanometer-sized materials in base fluids
Nanofluids, the fluid suspensions of nanomaterials, have
shown many interesting properties, and the distinctive
features offer unprecedented potential for many
applications.
3. Application of nano fluids
Heat Transfer Intensification
Electronic Applications
Transportation
Industrial Cooling Applications
Heating Buildings and Reducing Pollution
Nuclear Systems Cooling
Space and Defense
Solar Absorption
4. Why nano particles are added in
refrigerant
Addition of nanoparticles to the refrigerant results in
improvements in the thermophysical properties and heat
transfer characteristics of the refrigerant, thereby
improving the performance of the refrigeration system
Based on requirement properties of nano refrigerant can
be changed accordingly by manipulating concentration of
nanoparticles
5. What is R600a?
R600a is a refrigerant grade isobutane. It is a natural refrigerant that is
suitable for a wide range of applications in refrigerant. It is a very good
replacement of harmful refrigerants such as R12, R13a, R22,
hydrofluorocarbon and chlorofluorocarbon. R600a is a part of petrol gas that
is produced naturally.
Isobutane R600a has gained a lot of popularity in last few years due to its
exceptional thermodynamics performance and very low impact on the
environment. It is a non toxic substance with zero ozone depletion potential
and low global warming potential. R600a cycles may use a system of current
vapour compression with minimum design tweaks.
6. Properties of R600a
R600a does not cause green house effect.
R600a has a very strong cooling performance.
The power consumption of R600a is low.
R600a has a low speed of load temperature rise.
R600a is compatible with various lubricants.
7. Our aim?
To enhance the properties by adding nano fluid Tio2 in refrigerant R600a
• Author had added Tio2 nano particles in well
established R600a refrigerant to improve its
properties
What we had done?
8. Future scope
As only energy consumption test and freezing capacity test are performed in
experiment so various tests like
Calculating friction coefficient of refrigerant
Calculating heat transfer of refrigerant
Calculate effect on viscosity by adding nanofluid
Calculate effect on density of refrigerant by addition of nano fluid
Calculate effect on surface tension of refrigerant
This list is never ending but the whole thing depends upon application like in this
paper author focus on power consumption and freezing capacity which are key
parameters in domestic use but if we thought we are using it for space then
surface tension might be dominating one so it is solely depends upon application
9. Abstract
To analyze thermophysical properties (e.g. thermal conductivity, viscosity,
density, surface tensions and specific heat) of other fluids and applying in
nano refrigerant. As different fluids have different fundamental properties,
the model used may not a correct one. It is expected that if experimental
values of nano refrigerant are obtained, it would be more appropriate for
better analysis of heat transfer, energy performance, and lubricity and so on.
So the author perform energy consumption test and freezing capacity test on
R600a Tio2 and compare the result with normal R600a refrigrant.and he finds
nano fluids have lesser energy consumption with larger freezing rate for the
same load.
10. SUBMITTED BY SUB MITTED TO
Gagan Garg (801983001) Dr. Rohit Kumar Singla
THANK YOU
