Title of the Invention: Nanofluid Coolant Stabilization System Using Motorized Permanent
Magnetic Strainer
Information Regarding Invention
Motorized Magnetic Strainer for Nanofluid Coolant Stabilization in Automobiles
1. Background of the Invention:
(a) What is the scientific/engineering domain/field to which the invention applies?
Answer: Thermal Engineering, Automotive Engineering, Nanotechnology
(b) What is the subject matter of the invention?
Answer: Product. A magnetically active mechanical strainer system to stabilize nanofluid coolant
using a motorized permanent magnetic rotor placed inside the coolant tank.
(c) What is the prior art (research references) and its problem?
Answer: Prior research on nanofluids suggests the use of surfactants, ultrasonic stirring, or
static magnetic fields to prevent nanoparticle sedimentation. For example:
Das et al. (2006), Nanofluids: Science and Technology – mentions limited thermal
stability.
Wang et al. (2009), Thermal Conductivity of Nanofluids – notes sedimentation as a major
issue.
Technical drawback: These methods degrade over time or lack continuous dynamic re-
dispersion.
(d) What is the prior art in terms of patents?
Answer:
US20100247969A1 – Nanofluid cooling system for power electronics using magnetic
nanoparticles.
Drawback: Uses static magnetic fields only; no mechanical stirring.
CN104130965A – Nanofluid preparation with dispersant.
Drawback: Relies on chemicals that deteriorate under thermal stress.
(e) What are the current technologies/products and drawbacks?
Answer:
Market solutions use pre-mixed nanofluids with surfactants.
Drawback: Lack active re-dispersion methods; limited long-term stability in high-heat
environments.
(f) Which prior art problems are intended to be solved?
Answer:
Sedimentation and aggregation of nanoparticles.
Ineffective or degrading passive stabilization techniques.
(g) How does your invention overcome these problems?
Answer: By using a motorized rotating magnetic strainer, the system applies constant magnetic
and mechanical agitation, preventing particle settling and maintaining thermal consistency over
time.
(h) Summary of the invention:
Answer:
This invention presents a nanofluid coolant stabilization device using a motor-driven permanent
magnetic strainer placed inside the coolant reservoir of automobiles. Nanofluids, which are
known for their superior thermal conductivity, suffer from stability issues such as nanoparticle
sedimentation. The proposed device features a rotating shaft embedded with permanent
magnets and driven by a small motor. As the shaft rotates, it creates both mechanical
turbulence and a dynamic magnetic field. This motion re-disperses settled particles and
maintains homogeneous nanoparticle suspension throughout the coolant. This solution avoids
the drawbacks of static magnetic traps, degrading surfactants, and costly ultrasonic devices. It
ensures higher thermal efficiency, reduced maintenance, and longer operational life for
nanofluid coolants.
2. Details of Invention
a. Provide the Figure numbers with appropriate figure legends:
Figure 1:
Figure 2:
Figure 3:
(III) Novelty and Inventiveness
a. Novel technical features:
Integration of motor-driven mechanical motion with magnetic action.
Continuous nanoparticle agitation.
Energy-efficient and thermally robust design.
b. Novelty from prior art: None of the known solutions combine active magnetic and
mechanical agitation inside the fluid container itself.
c. How it works: The motor turns a magnetized shaft inside the nanofluid. The magnetic and
mechanical action stirs the fluid continuously, preventing particle settling and maintaining
thermal uniformity.
d. Industrial application: Automotive cooling systems, electric vehicles, aerospace electronics
cooling.
e. Patentability under Indian Patent Act, Section 3: Yes, it is a technical advancement with
industrial application and does not fall under exclusions in Section 3.
(IV) Testing and Results : No prototype tested yet; theoretical modeling under progress.
(V) Govt. Permissions Needed? No special permissions currently known. Will comply with
automotive standards.
(VI) Biological materials used?
No.
(VII) DNA/RNA/protein sequences used? No.
(VIII) Traditional knowledge involved? No.
(IX) Abstract : This invention introduces a motorized magnetic strainer system for nanofluid
coolant stability in automobile applications. Designed as a compact unit within the coolant
reservoir, it uses a rotating shaft embedded with permanent magnets, driven by a DC motor.
This system provides simultaneous magnetic attraction and mechanical stirring, ensuring
constant nanoparticle suspension. It prevents the common issue of sedimentation in nanofluids,
thereby maintaining consistent thermal conductivity and improving system efficiency. This is a
product-type invention designed for real-time stabilization of magnetic nanofluids.
3. Technology Transfer & TRL
(I) Raw Materials:
Neodymium magnets, small DC motor, polymer strainer cage, steel shaft, nanofluid
sample
(II) Prototype Cost (approx): INR 10,000 – 15,000
(III) Prototype Time: 2-4 weeks
(IV) TRL Level of prototype: TRL 3–4 (concept validated, early lab model)
(V) Stages to TRL 9:
TRL 5: Functional lab prototype
TRL 6: Environmental testing
TRL 7: In-vehicle testing
TRL 8–9: Field testing and optimization
(VI) Market Viability: Yes, initial discussions with EV system developers show interest.
(VII) Market Cost of Product: Estimated INR 3,000–5,000 per unit (mass production)
(VIII) Regulatory Permissions: May require ARAI or BIS certification for automotive cooling
systems
(IX) Environmental Impact: Positive. Prevents waste of nanofluid, reduces clogging, improves
efficiency
(X) Suggested Companies:
1. Mahle India
2. Bosch Ltd.
3. Tata AutoComp Systems
4. Amara Raja Batteries
5. Valeo Thermal Systems
6. Hella India
7. Exide Industries
8. Ather Energy
9. Ashok Leyland
10. TVS Motors
