INVESTIGATION OF SUITABLE PRODUCTION MATERIALS FOR CONSTRUCTION OF RAW MILK PASTEURIZER

Abstract

Heat exchanger- versatile equipment which finds its application in both industrial and domestic environment was designed with the principle of recycled heat transfer technique over a short concentric tube heat exchanger. The aim was to ascertain its viability to select the suitable material for the heat exchanger and components fabrication. A host of common pipe materials were selected and passed through heat transfer test to obtain coefficient of heat transfer of each material and also Biochemical analysis to validate selection of the better material. The thermal conductivity of each material is the instrument for obtaining each heat transfer coefficient with stainless steel having the most suitable and safest at Ui(0.1) = 1.355, Ui(0.15) =2.032, Ui(0.2) =3.386, Ui(0.25)= 3.519 and Ui(0.3) = 3.661. Also, the three critical parameters for biochemical analysis which were considered provided stainless steel with the better values of mean velocity and standard deviation for safety of milk consumption standing at 24.30 ± 0.01, 2.81 ± 0.01 and 6.65 ± 0.01 for Titratable acidity, Casein level and PH level respectively. These results ensure safe milk consumption.