Mixed Mode Solar Dryer

Volume 7, Issue 5, May – 2022 International Journal of Innovative Science and Research Technology
ISSN No:-2456-2165
Mixed Mode Solar Dryer

SHUBHAM MHATRE, ATULKUMAR VAGHELA, JITESH MAHESHWARI, PRATHAMESH SURYAWANSHI
guided by Prof. PRAMOD SURYAVANSHI
(Department of Mechanical, Bharati Vidyapeeth College of Engineering, Navi Mumbai)
Abstract:- Mixed mode solar dryer composed of solar chamber and a blower. For dryer to more drying rate, they
collector and a drying chamber. The flat plate collector carried out tests in different conditions.
is the most extensively used solar collector for domestical
and business motive because it is easy and portable III. CONSTRUCTION
format and required lots much less maintenance. The
drying device uses most effective solar energy. The air  Solar Air Collector: The Solar Air Collector consists of
allowed in through air inlet is heated up inside the solar components aluminum absorber plate, black glass and for
collector channeled through the drying chamber wherein insulation black paint is applied which helps in decreasing
it is implemented in drying and removing the moisture the heat loss. For absorbing solar energy 1mm thick
content from the agriculture product. This paper gives a aluminum plate is used. The important material that is
format of mixed mode dryer for drying products records used in the dryer is 5mm thick black tinted glass. The
were obtained from the results. casing is made up of sheet metal, which surrounds the
forging components and keeps them free from dust and
I. INTRODUCTION moisture.
 Drying Chamber: The drying chamber is constructed of
Solar dryers are devices used to remove moisture in sheet metal with aluminum frame body. It consists of flat
agricultural products or foods by means of heat produced tray with holes for drying the product. To increase heat
from solar energy. Solar dryers are classified as direct, absorption, black coating is applied on the drying
indirect and mixed mode solar dryers. Direct solar dryer chamber. The roof of drying chamber is covered with
uses direct sunlight for drying the food. It consists of a black tinted glass with 5 mm thickness. To control the
drying chamber with transparent roof cover, food tray and convection flow of air an outlet vent is provided to the
air inlet and outlet vents. In an indirect solar dryer, a solar upper end of drying chamber. A door is also provided at
collector is air heated and then passes through the food tray the back of the drying chamber to access tray.
for drying the food.  Blower: A blower of 600V with motor speed of 15000rpm
and blowing speed of 80mph is used to pass the hot air
Mixed mode solar is basically a combination of direct
from the solar collector to the drying chamber.
and indirect solar dryers. In mixed mode solar dryer, the
food is dried by the heat generated from direct sunlight and
the heated air from the solar collector. In comparison with
direct and indirect dryers, it is best and significantly gives
better results.
II. LITERATURE REVIEW
 Vigneshwaran.T: They proposed the design of the mixed-

mode solar dryer, which consists of a solar collector and a
drying chamber. From its construction, it is concluded that
solar radiation can be used effectively and efficiently to
dry various agricultural products. Also, with the little
region of the dryer, the entire arrangement can be
conveyed anyplace without any problem. Fig.1: Working Model of Mixed Mode Solar Dryer
 Bukola O. Bolaji: This paper gives the design,
construction and overall performance assessment of a solar
dryer which is used to preserve food. When they were
testing the dryer, they noticed that during most hours of
sunlight, the temperature inside the solar collector and
chamber were much higher than ambient temperature.
 Emmanuel Ayua: In this study, from a Horticultural
Innovation Laboratory design they have made a mixed
mode solar dryer. And compared it to a direct solar dryer,
where mixed mode solar dryer had high drying rate. They
made it at low cost and suitable for drying small scale
agricultural products.
 Syed Mohammed Shamiq: In this study, they have Fig. 2: Solidworks model of mixed mode solar dryer
developed a solar dryer with a solar collector, a drying
IJISRT22MAY1303 www.ijisrt.com 699

Volume 7, Issue 5, May – 2022 International Journal of Innovative Science and Research Technology
ISSN No:-2456-2165
IV. METHODOLOGY REFERENCES
The procedure of dehydration includes elimination of [1.] Shobhana Singh and Subodh Kumar; Comparative
moisture from the product by heat generated from direct Thermal Performance Study of Indirect and Mixed-
sunlight and heated air from collector. First the product to be mode Solar Dryers; International Journal of
dried is washed, peeled and prepared (if necessary), and Sustainable Energy Development, 2012.
placed on flat-bottomed trays of drying chamber. The direct [2.] Chandrakumar B Pardhi and Jiwanlal L Bhagoria;
sun rays on the solar air collector and drying chamber Development and performance evaluation of mixed-
elevate the drying chamber temperature and the heat mode solar dryer with forced convection; Pardhi and
produced is used to dry the product. The heated product Bhagoria; International Journal of Energy and
offers out water vapor and dries up. Gradually the moist air Environmental Engineering, 2013.
goes up and leaves the drying chamber through the air outlet [3.] Emmanuel Ayua, Violet Mugalavai, James Simon,
on the back of drying chamber. Stephen Weller, Pamela Obura and
NamanNyabinda;Comparison of a mixed modes solar
V. RESULT (GRAPH) dryer to a direct mode solar dryer for African
indigenous vegetable and chili processing: AYUA et
Time Temperature in Normal al, 2016.
(pm) dryer(0C) temperature(0C) [4.] Vigneshwaran.T, Aravindh.A, Jayaraj.R,
2.15 34.7 34.7 Balachandar.B and Arumugam.P;Design of Mixed
2.45 45.9 34.8 Mode Solar Dryer, 2015.
3.15 44.3 35 [5.] Bukola O. Bolaji and Ayoola P. Olalusi;
3.45 43.7 35.3 Performance Evaluation of a Mixed-Mode Solar Dryer,
4.15 44.8 35.2 2008.
4.45 45.9 35.3 [6.] Durga V. N. Lakshmi, PalanisamyMuthukumar,
5.15 44.2 34.6 Jasinta P. Ekka, Prakash K.Nayak and
5.45 41.6 33.3 ApurbaLayek: Performance comparison of mixed
Table1: Reading without blower mode and indirect mode parallel flow forced
convection solar driers for drying Curcuma zedoaria,
Time Temperature in Normal 2019.
(pm) dryer(0C) temperature(0C)
2.15 37 34.2
2.45 41.8 34.4
3.15 43.7 34.7
3.45 46.7 35
4.15 46.9 35.2
4.45 49.3 35.1
5.15 48.6 34.9
5.45 46.9 34.1
Table 2: Reading with blower
From the table 1 and 2readings, it concludes that by

using blower, we get more temperature in the drying
chamber.
By using blower, it gives more efficiency in sunny

days as well as cloudy weather.
VI. CONCLUSION
The portable Mixed Mode Solar Dryer is used to dry

the produce by using the blower and direct sunlight.
By using the blower there is increase in the

temperature inside the drying chamber and product is dried
faster than any regular drying process.
Without blower the temperature doesn’t increases that

much as compared to using blower.
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Mixed Mode Solar Dryer

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Volume 7, Issue 5, May – 2022 International Journal of Innovative Science and Research Technology

Mixed Mode Solar Dryer

II. LITERATURE REVIEW

 Vigneshwaran.T: They proposed the design of the mixed-

IJISRT22MAY1303 www.ijisrt.com 699

From the table 1 and 2readings, it concludes that by

By using blower, it gives more efficiency in sunny

The portable Mixed Mode Solar Dryer is used to dry

By using the blower there is increase in the

Without blower the temperature doesn’t increases that

IJISRT22MAY1303 www.ijisrt.com 700

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