1. SOLAR AIR HEATER
GUIDE: MEMBERS:
Mr. Varun Pratap Singh Riya
(Asst. Prof. ME Dept.)
FINAL YEAR PROJECT
2. Content
Introduction
Literature Review
Gap Finding
Objective Function
Parameter and range selection
Reference Setup CAD Design
Prototype making
Real scale setup construction/fabrication and installation
Component of setup
Constructed Setup
Testing and Equipment
4. Literature Review
Solar air heater from the major component of solar
energy utilization system which absorbs the incoming
solar radiations , converting it into thermal energy at
the absorbing surface , in transferring the energy to a
fluid flowing collector. The efficiency of flat plate solar
air heater has been found to be low convective heat
transfer coefficient between the absorber plate and the
flowing air which increases the absorber plate
temperature , leading to high heat losses to the
environment resulting in low thermal efficiency of such
collectors.
Artificial roughness in the form of repeated ribs the
most effective and economic way of improving the
thermal performance of solar air heater.
5. Gap Finding
From the Literature review we conclude that the Multi
V ribs with gap gave highest enhancement in nusselt
number , however there was a very high enhancement
in friction factor also.
All the research work is done on Single pass SAH so we
worked upon the Double pass SAH.
From Literature review we also conclude that by
providing turbulence ( Ribs ) the SAH is more efficient
than Flat plate SAH.
6. Objective Function
The major objective of this work is to find out the ways
to improve effectiveness of SAH by integration of
Artificial Roughness Solar Air Heater By Using Perforated
Multi V Ribs with Double Pass Parallel Flow.
The second objective is to come out with new shape
and geometry to enhance effectiveness of SAH and
compare it with other existing geometries and find out
gaps and limitations of that shape.
7. Selection of Parameters and
its ranges
Equations Used are DITTUS BOELTER and MODIFIED
BLASSIUS EQUATION.
Parameters Used are Raynolds Number , Nusselt
number , Friction factor and we have to find out
variation in between these parameters with respect to
other by plotting graphs.
