Development of an evaporative cooling system for the preservation of fresh vegetables

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Development of an evaporative cooling system for the preservation of fresh vegetables

ABSTRACT

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.

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THE EFFECT OF MATERIAL MANAGEMENT TECHNIQUE ON PRODUCTION PLANNING PROCESSES

ATTENTION: BEFORE YOU READ THE 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 N5,000 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 THE EFFECT OF MATERIAL MANAGEMENT TECHNIQUE ON PRODUCTION PLANNING PROCESSES ABSTRACT The aims and objectives of this work is to examine “The Effect of Materials Management Techniques on Production Planning Process with reference to United Nigeria Textile Plc (UNT Plc), Kaduna... Materials management is open to so many problems in industrial sector in Nigeria, especially when theory and practice are compared. Among the problems facing materials management in Nigeria, which is also peculiar to the company which the project is based on are: Multiplication of materials manag...

EFFECT OF POOR INFRASTRUCTURAL FACILITIES IN THE DEPARTMENT OF SECRETARIAL STUDIES

ATTENTION: BEFORE YOU READ THE 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 N5,000 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 EFFECT OF POOR INFRASTRUCTURAL FACILITIES IN THE DEPARTMENT OF SECRETARIAL STUDIES CHAPTER ONE 1.0 INTRODUCTION Secretarial studies is a vocational programme that is offered in Polytechnics, Colleges of Education and Universities primarily to educate and train students to become secretarial teachers and administrators with the appropriate skills and competencies to take up a career in teaching, office occupation and business. According to Amoor and Udoh (2008), secretarial education is an area of instruction that has been in existence for...

EFFECT OF TEMPERATURE ON THE GROWTH OF YEAST

ATTENTION: BEFORE YOU READ THE 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 N5,000 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 EFFECT OF TEMPERATURE ON THE GROWTH OF YEAST ABSTRACT Yeast cells respire aerobically if there is enough oxygen supply. If there is not enough oxygen present then fermentation will take place as the yeast cells have to respire anaerobically. Fermentation makes energy that is used for cell growth. When yeast cells ferment they also produce ethanol (alcohol) which is important to brewers. The yeast cells need sugar to ferment as without sugar, the yeast cells would not be able to respire at all. The sugar supply provided is called sucrose, Enzymes in the yeast cells break d...

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