Gıda Uygulamaları Laboratuarı

Sertlik Testleri

Sertlik Tanımı -Brinell Sertlik Deneyi (HB) -Vickers Sertlik Deneyi (HV) -Rockwell Sertlik Deneyi (HR) Sertlik Nedir? Basite indirgendiğinde oldukça kolay tanımlanan bir özelliktir; – tebeşir yumuşak, – çelik serttir. Malzeme özelliği olarak ele alındığında; Sertlik, malzemelerin plastik deformasyona karşı direnç gösterebilme kabiliyetidir. …
Tray Dryer ( Ayşenur ÇİFTASLAN )

CONTENTS: INTRODUCTION PURPOSE THEORY PROCEDURE MATERIALS RESULTS -CALCULATIONS DISCUSSION REFERENCES …
Tray Dryer ( Canan ÇİÇEK )

The dryers consist of a cabinet containing trays which is connected to a source of air heated by gas, diesel or bio-mass such as rice husk. The air temperature is usually controlled by a thermostat which is normally set between 50 and 70 OC. The air enters the bottom of the chamber below the trays and then rises, through the trays of food being dried, and exits from an opening in the top of the chamber. In the IT systems the trays are designed to force the air to follow…
Gıdaların Kurutulması

Kurutma; dayanma süresi kısa olan ürünlere uygulanan saklama yöntemlerinden biridir. Kısaca bir maddenin neminin alınması olarak tanımlanabilir (Bulduk, 2004). Kurutma gıdalarda mevcut suyun büyük bir kısmının uzaklaştırılarak, su miktarının (su aktivitesinin) mikroorganizma faaliyetlerini önleyecek seviyeye düşürülmesi işlemidir (Ertugay ve ark., 1990). Gıdaların kurutularak korunması yöntemi, insanın doğadan öğrendiği ve ilk çağdan beri uygulamakta olduğu en eski saklama yöntemidir. Gerçekten bu yöntem doğada çoğu zaman kendi kendine gerçekleşmektedir. Örneğin, çeşitli tahıllar ve baklagiller tarlada kendi halinde kuruyarak dayanıklı hale gelebilmektedir. Doğada kuruma, güneş ısısıyla gerçekleştiğinden, kurumanın her yerde ve her zaman…
Concentric Tube Heat Exchanger ( Ali SÖNMEZ )

OBJECTIVE: The objective of this experiment is to study the working principles of a concentric tube heat exchanger operating under parallel and counter flow. INTRODUCTION: Up to this point we have learned how to analyze conduction and convection heat transfer in various systems with different geometries. This information, however, is not very useful unless it can be applied to practical situations. For this reason we shall devote this experiment to a prototypical application of heat transfer analysis known as a heat exchanger. A heat exchanger is a device that efficiently…
Concentric Tube Heat Exchanger ( Zeynep AYDIN )

In this experiment, our aim is to demostrate the working principles of concentric tube heat exchanger operating under paralel and counter flow conditions and the observe the effect of flow rate and hot water temperature variation the performance charasteristics of a concentric tube heat exhanger. A heat exchanger is used when it is necessary to transfer heat from one fluid to another without mixing the fluids. Two types of heat exchangers, parallel flow and counter flow, will be examined in this lab. The parallel flow heat exchanger has the hot…
Cream Separation

Milk is an oil-in-water emulsion, with the fat globules dispersed in a continuous skimmilk phase. If raw milk were left to stand, however, the fat would rise and form a cream layer. Homogenization is a mechanical treatment of the fat globules in milk brought about by passing milk under high pressure through a tiny orifice, which results in a decrease in the average diameter and an increase in number and surface area, of the fat globules. The net result, from a practical view, is a much reduced tendency for creaming…
Cream Separation, Churning & Homogenization

Purpose of the experiment: The aims are: • to separate cream from milk and to obtain milk fat by application of churning process. • to show how homogenization works • to produce butter and pure fat using churning. CLARIFICATION AND CREAM SEPARATION The following topics will be covered in this section: • Centrifugation • Separation • Clarification • Standardization …