ATTENTION:
BEFORE YOU READ THE ABSTRACT OR
CHAPTER ONE OF THE PROJECT TOPIC BELOW, PLEASE READ THE INFORMATION BELOW.THANK
YOU!
INFORMATION:
YOU CAN GET THE COMPLETE
PROJECT OF THE TOPIC BELOW. THE FULL PROJECT COSTS N10,000 ONLY. THE FULL
INFORMATION ON HOW TO PAY AND GET THE COMPLETE PROJECT IS AT THE BOTTOM OF THIS
PAGE. OR YOU CAN CALL: 08068231953, 08168759420
DESIGN, CONSTRUCTION AND TESTING OF AN EVAPORATIVE
COOLING SYSTEM FOR STORING VEGETABLES
PROPOSAL
An evaporative
cooling system for the preservation of fresh vegetables was developed for
extending the shelf life of tomatoes and carrots and its performance was
evaluated. It consists of a pyramidal shaped with total storage space of 0.075
m3, made of galvanized mild steel, stainless steel and internally insulated
with 0.025 m polystyrene foam, a suction fan of 4.3 m/s velocity air flow and
0.5 W (1250 rpm), cooling pad (Jute) of 0.06 m thickness and water pump with
discharge capacity of 3.5 l/min as well as a power rating of 0.5 W. A water
reservoir of capacity 62.5 m3 is linked to the cooling system at the bottom
through a P.V.C. pipe supplying water to keep the cooling pad/mesh continuously
wet. Study was conducted to check the freshness of tomatoes and carrots, and
data were observed daily. Results of the transient performance tests revealed
that the evaporative cooling system chamber temperature and relative humidity
depression from ambient air temperature varied over 16-26°C and 33-88%
respectively. Ambient air temperatures and relative humidity during the test
periods ranged over 26-32°C and 18-31% respectively. The shelf life of the
vegetable produce inside the evaporative cooling system was extended by
fourteen days relative to ambient storage. Thus, the evaporative cooling system
has the prospect of being used for short term preservation of vegetables soon
after harvest and it will be very useful in a developing economy like Nigeria.
Background of the
study
Most of the
post-harvest losses incurred on fruits and vegetables in developing countries
are due to lack of adequate storage facilities. While refrigerated cool stores
are expensive to install and run, they are still the best method of preserving
fruits and vegetables.Cooling through evaporation is an ancient but effective
method of lowering temperature. The quality of fresh fruits and vegetables
depends on post-harvest handling, transportation and storage (Haidar and
Demisse, 1999). Compared with several temperate fruits and vegetables, tropical
and subtropical vegetables such as tomatoes and carrots, present greater
storage and transportation problems because of their perishable nature (Mitra
and when available in order to ensure their constant supply throughout
the year with their nutritional value still retained (CFNEU, 2003). In
addition, preservation of fruits and vegetables is of great importance because
it makes provision for delayed use and eliminates wastage (Aremu, 1975). Low
temperature handling and storage have been described as the most important
physical method for post-harvest loss control (Seyoum and Woldetsdik, 2004).
Temperature of the surrounding air and produce can be reduced by forced air
cooling, hydro cooling, vacuum cooling, and adiabatic cooling (Thompson et al.,
1998). In developed countries, methods employed for extending shelf life and
minimizing post-harvest losses of perishable produce include mechanical
refrigeration, controlled atmospheres, hypobaric storage, and other
sophisticated techniques. These techniques are highly capital intensive and for
most developing countries, the required manpower is either lacking or
inadequate. These cooling methods, except adiabatic cooling, are expensive for
small scale peasant farmers, retailers and wholesalers, as they require electric
power. Moreover, in the existing mechanical refrigerating systems, proper
storage conditions are not often put into consideration as stored items
(vegetables) were normally subjected to excessive chilling or freezing. The
injurious effects this has on stored vegetable products are often very severe,
hence, one of the major reasons for the low efficiency of this system in
extending the shelf life of fresh vegetables. Low temperature and high relative
humidity can be achieved by using less expensive methods of evaporative cooling
(Seyoum and Woldetsadik, 2000; Seyoum and Woldetsadik, 2004). Evaporative
cooling has been reported for achieving a favorable environment in greenhouses
(Jain and Tiwari, 2002), animations and the storage structure for fruit and
vegetables
HOW TO GET THE FULL PROJECT
WORK
PLEASE, print the following
instructions and information if you will like to order/buy our complete written
material(s).
HOW TO RECEIVE PROJECT
MATERIAL(S)
After paying the appropriate
amount (#10,000) into our bank Account below, send the following information to
08068231953 or 08168759420
(1)
Your project topics
(2)
Email Address
(3)
Payment Name
(4)
Teller Number
We will
send your material(s) after we receive bank alert
BANK ACCOUNTS
Account
Name: AMUTAH DANIEL CHUKWUDI
Account
Number: 0046579864
Bank:
GTBank.
OR
Account
Name: AMUTAH DANIEL CHUKWUDI
Account
Number: 2023350498
Bank:
UBA.
FOR MORE INFORMATION, CALL:
08068231953 or 08168759420
https://projectmaterialsng.blogspot.com.ng/
https://foreasyprojectmaterials.blogspot.com.ng/
https://mypostumes.blogspot.com.ng/
https://myeasymaterials.blogspot.com.ng/
https://eazyprojectsmaterial.blogspot.com.ng/
https://easzprojectmaterial.blogspot.com.ng/
Comments
Post a Comment