Fabrication And Performance Evaluation Of Cold Storage System

3.3.1    Cold Storage System
    The type of cold storage system used is special (combi) cold storage machinery for fruits and vegetables with other items. These facilities store potatoes and other vegetables at one temperature and also have other compartment specially designed for keeping seeds, pulps, and fruits at the best temperature for preservation. It has various units for proper control of temperature and relative humidity.
3.3.2    Capacity of the storage system
    It is generally defined in terms of the store volume but there are a number of ways in expresses this value. It is measure in cm3.
i.    Gross volume: is the volume of the refrigerated space.
ii.    Effective volume: is the store space that can actually be utilized for storage and its; takes into account the requirement for passage ways stacking equipment e.t.c
V =     L x B x H (cm3).
3.3.3    Power Requirement for cold storage system
    The power required for the operation of a cold storage system is high-voltage main electricity. A transformer unit must supply low-voltage mains in the establishment via a general switchboard.
3.3.4    Nature of Fruits and vegetables
    Fresh, filling and heart-healthy, fruits and vegetables are an important part of your overall healthy eating plan.
    They are high in vitamins and minerals that are good for your health. These include vitamins A (beta-carotene), C and E, magnesium, Zinc, phosphorous and folic acid. Folic acid may reduce blood levels of homocysteine, a substance that may be a risk factor for coronary heart disease.
    Eating a variety of fruits and vegetables may help you control your weight and your blood pressure.     
3.4    Design Calculation and Analysis
3.4.1 Capacity of the Cooling Chamber   
    Cooling capacity is the measure of a cooling systems ability to remove heat. The S.I units are watts (w). Another common unit is the ton, which describes the amount of water at a given temperature that can be cooled in a given amount of time.
    The capacity of the cooling chamber is given as
V= L x B x H
V= Volume of the could storage structure
L= length, B= width or breadth, H= Height
L= 2.21m, B= 1.52m, H= 1.93m
Volume= 2.21 x 1.52 x 1.93 = 6.48m3
3.4.2    Heat transfer Analysis of the System
    The heat gain by the stainless materials used for the cabinet construction was estimated using Fourier’s law of heat conduction.