Construction and Operation of Solar Powered Egg Incubator

Full text

Construction and Operation of Solar Powered
Egg Incubator
Kelebaone Tsamaase, Kagiso Motshidisi,
Rapelang Kemoabe, Ishmael Zibani, Refilwe Moseki
Electrical Department,
University of Botswana
Gaborone, Botswana
Abstract—This paper deals with the solar powered egg
incubator which has been constructed operated to show that it
can work as expected. The incubator has been developed
particularly for areas without any access to electricity grid but
having potential for chicken farming. The carrying capacity of
the constructed incubator is 40 eggs. However, large capacity
incubators using the same principle of operation can be
constructed as well. The incubator has proven to be working
accordingly well because it was able to regulate internal
temperatures and relative humidity to keep them within
allowable temperature range and relative humidity range
respectively. It was able to tilt the tray on their side at
predetermined intervals. Further work will include
demonstrating the effectiveness of the incubator by putting it in
practice. Its efficiency will be determined as part of future work.
Keywords— Egg incubator, photovoltaic system, efficiency
Introduction
I. INTRODUCTION
Chicken incubation is where by eggs are incubated and
hatched with the use of technology or through man-made
equipment. The normal hatching period is 21 days, same
period taken by a hen when the natural hatching is taking
place because egg incubation and chicks’ raising is not part of
the process. However, comparatively artificial incubation is
more advantageous because when the hen has finished laying
eggs, it does not take long before it lays again. For natural
hatching, the hen generally spends 21 days from incubation to
hatching. Requires another period from weeks to months to
raise chicks and that is when thereafter it can start laying eggs
again. Therefore, building and utilization of solar powered
egg incubator improves the results of poultry of chicken
farming and the overall living of the farmers and communities
in general. There are areas which do not have access to the
electricity grid. Examples can be places away from grid, place
whose geographical positioning makes it very expensive to
have grid extended to them. For these places, the viable option
is use of off grid electricity supply in particular the solar PV
system due to abundance of solar energy and its
environmentally friendliness[1, 2]. This paper is focusing on
the building of an automated incubator powered from solar PV
system [3]. The intention of the project is to further have an
incubator which is built from locally acquired materials.
The rest of this paper is arranged as follows: Section II
deals with energy source of the incubator, principle of
operation of PV system, Section III operation of the system
deals with main equipment used, Section IV deals with
operation of proposed incubator system, Section V deals with
system sizing, Section VI is on programme developed for
loading into the micro controller, Section VII deals with
equipment setup and the results, Section VIII is conclusion
and future work
II. ENERGY SOURCE OF THE SYSTEM
The incubator was designed to be powered from solar
energy system. Due to its nature of operation it was designed
such that it useful in areas where there is no access to
electricity grid. The system is designed such that it powers the
motor directly if there is enough solar radiation. Alternatively
where there is not enough solar energy input a battery is
provided as an energy storage to provide power to the system
[5]. A general schematic diagram of the PV system is show in
Figure 1.
Figure 1 – schematic diagram of solar PV energy system [6]
III. SYSTEM OPERATION
There are three key parameters important for the
incubation of eggs. These are relative humidity, temperature
and egg turning defined in terms of angle of inclination of egg
tray as it swings on either side of the axis. The schematic
diagram showing a cross section of the incubator with features
for the control of such parameters is show in figure 2. The
bulbs are using to provide heating to raise temperature to the
required range. The fan is used speed water evaporation from
the water reservoir to increase humidity to the required level.
The motor which is equipped with actuator mechanism is used
to tilt egg tray at an angle of 45 degrees on either side of the
axle at predetermined intervals. The incubator has electronic
displays showing balance of days left before hatching. They
also show the internal ambient temperature and relative
humidity. The incubator components are powered from solar
International Journal of Engineering Research & Technology (IJERT)
ISSN: 2278-0181http://www.ijert.org
IJERTV8IS120232 (This work is licensed under a Creative Commons Attribution 4.0 International License.)
Published by :
www.ijert.org
Vol. 8 Issue 12, December-2019
675

photovoltaic (PV) energy system. The system has the option
of powering the circuits directly from the panel. Alternatively
when there is not enough power from the panel the system is
powered from a battery which is used as energy storage.
Figure 2 – Cross sectional view of the egg incubator
IV. EXPERIMENTAL SETUP
The incubator was built as show in Figures 3 to 4. Figure 3
shows solar PV system connects whilst Figure 4 shows
connections in Figure 4 show between the PV module,
controller or regulator and the battery. The casing of cover
was made from foam material. It was preferred because it was
to susceptible to sudden change of temperatures and humidity
and was easy and cheap to acquire. However, to make the
casing durable, a thin hardboard was used to enclose the foam
in between. Other components connection are as shown in
Figure 4. Figure 5 shows the assembly and connection of
dehumidifying fan which is used for regulating relative
humidity in the incubator.
Figure 3: PV system components connections
PV system components connections
Figure 4: Experimental setup of the incubator
Figure 5 – shows DC humidifying fan and corresponding water reservoir
V. RESULTS
The result below were obtained when operating the incubator
under different environmental or weather conditions. In
Figure 6 the temperature fell below the normal operating
temperature range. The temperature display unit reading
shows 34.1 degrees celsius and a relative humidity reading of
24.4%. This triggered, through temperature sensor, the bulbs
to switch on as on the figure. When the temperature has
reached the upper value of the temperature range, 39 degrees
Celsius, the lights switched off as shown in Figure 7 where
the temperature reading was 39.2 degrees and the lights went
off. The relative humidity reading was 18.7%. Regarding the
turning of egg tray on either side of the axle, Figure 4 shows
such turning. When it was supplied with power. Figure 8
shows the countdown of days (balance of days), starting with
21days, before hatching. The counter enables the user to
make prior preparation form the small chicks before hatching.
The parameters, temperature and relative humidity were
monitored over a period of time and the results were recorded
in Table 1. The results were also presented graphically as
shown in Figures 9 and 10. Figure 6: Bulbs are ON when
temperature is below 36.5°C
Figure 6 – The lights are on when temperature is below 36°C
Figure 7: Bulbs are OFF when temperature increases beyond 39°C
International Journal of Engineering Research & Technology (IJERT)
ISSN: 2278-0181http://www.ijert.org
IJERTV8IS120232 (This work is licensed under a Creative Commons Attribution 4.0 International License.)
Published by :
www.ijert.org
Vol. 8 Issue 12, December-2019
676

Figure 8 – Counter and display units for days left before hatching
Table 1: Ambient temperature readings (external and
internal) and relative humidity (internal and external)
April 25, 2019
Ambient Temperature (°C)
Relative Humidity (%)
Time
Internal
External
Internal
External
9:00 am
28.9
24.8
51.5
16.1
9:30 am
34.3
28.5
39.3
16.2
10:00 am
37.1
30.3
36.7
16.4
10:30 am
38.6
30.1
35.1
14.3
11:00 am
38
28.8
36.6
12.8
11:30 am
36.9
28.9
36.7
13
12:00 pm
38.4
28.9
31.8
12.3
12:30 pm
37.7
29.3
35.7
11.8
1:00 pm
37.9
29.2
48.6
13.1
1:30 pm
38.8
26.6
57.2
12.2
2:00 pm
39.2
27.2
58
11.1
2:30 pm
39.0
27.8
60.5
10.6
3:00 pm
38.8
29
56.3
15
3:30 pm
38.2
28.5
58.3
16.3
4:00 pm
36.9
29
61.7
24
4:30 pm
37.9
27.3
56.3
30.5
5:00 pm
38
26.9
54.1
31.6
5:30 pm
37.6
25.5
56.3
35.1
6:00 pm
37.2
25
56.4
37.4
Figure 9 - Internal and external ambient temperatures
Figure 10 – Internal and external relative humidity
VI. ANALYSIS OF THE RESULTS
The results as presented in Table 1 and in Figures 9 and 10
show that the design incubator successfully operated as
expected. Figure 8 shows that though the external ambient
temperature was in the range of around 30 °C the internal
temperature readings were around 39 °C. This internal
temperature falls within design temperature range of 36 to 39
°C. Regarding relative humidity, Figure 10 shows that the
external relative humidity was low in the range of 10% to
around 29%. However, the internal relative humidity was
increased from low values of around 30% to as high as 60%.
The final reading of around 60% also falls with the design
range of the incubator. Same results are also presented in
tabular form as shown in Table 1. The egg tray turning
mechanism was operating accordingly as it managed to turn
the try on either side not exceeding a preset value.
VII. CONCLUSION AND FUTURE WORK
The results show that the incubator is working accordingly
as expected. In was responding to temperature variations
which fell outside set temperature range. The same was
observed whereby it responded well to the relative humidity
readings outside the set humidity range. The egg tray was also
turning on either side to the axle or pivot with maximum tilt
angle not exceeding 45 degrees. Also, the solar PV system
provided enough power to operate the synchronous motor and
also to provide power to other electronic gadgets in the
system, and all the operating mechanism such as egg tray
turning operated as expected. For further work the incubator
packaging is to be improved and be tested under normal
working environment with eggs inside.
VIII. REFERENCES
[1] M. O. North and D. D. Bell, Commercial chicken production manual.
Chapman & Hall, 1990.
[2] V. S. Kumar, J. Prasad, and R. Samikannu. Computational Linear
Model for predicting solar energy in Botswana. 2017 International
Conference on Energy, Communication, Data Analytics and Soft
Computing (ICECDS). Chennai, India. 21 June 2018. p. 1-5.
[3] [Radhakrishman K., Jose N., Sanjay SG, Cherian T and Vishnu K.R.
“Design and implementation of a fully automated egg incubator.
International Journal of Advanced Research in Electrical, Electronics
and Instrumentation Engineering (2014)
[4] M. C. Nesheim, R. E. Austic and L. E. Card, Poultry Production. Lea
& Febiger, 1979.
[5] Beaule J., Ryan M. and Salley G., Deep Cycle Batteries. Alternative
Energy Store Inc., 2016.
International Journal of Engineering Research & Technology (IJERT)
ISSN: 2278-0181http://www.ijert.org
IJERTV8IS120232 (This work is licensed under a Creative Commons Attribution 4.0 International License.)
Published by :
www.ijert.org
Vol. 8 Issue 12, December-2019
677