SELECTION OF HEAT EXCHANGER FOR USE IN INDUSTRIAL DRYING PROCESS

The aim of this study was to determine the effect of differentiated air relative humidity during the drying process on selected quality features of TSG (traditional specialties guaranteed) pork and poultry-pork kabanosy. After heat treatment and 24-hour cooling at 4–6°C, the products were placed in three chambers at 15°C with differentiated air relative humidity: 60, 70, and 80%, respectively. The drying process was carried out until all variants of kabanosy achieved the required final yield of the product (<68%). Color components, water activity and shear force, water, protein, fat, and salt content, and the TBARS indicator values were determined. The drying process might be shortened (~50%) by a reduction of humidity in the drying chamber from 80 to 60%. The changes in the content of chemical components in pork kabanosy compared to poultry-pork ones demonstrated the different dynamics of the drying of the two types of kabanosy and the need for the selection of optimum drying conditions relative to raw material composition.

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Multipass Plate Heat Exchangers—Effectiveness-NTU Results and Guidelines for Selecting Pass Arrangements

Journal of Heat Transfer ◽

10.1115/1.3250678 ◽

1989 ◽

Vol 111 (2) ◽

pp. 300-313 ◽

Cited By ~ 45

Author(s):

S. G. Kandlikar ◽

R. K. Shah

Keyword(s):

Heat Capacity ◽

Heat Exchanger ◽

Finite Difference Method ◽

Heat Exchangers ◽

Rate Ratio ◽

Plate Heat Exchanger ◽

Tabular Form ◽

Plate Heat ◽

Number Of Passes ◽

Selection Of

Plate heat exchangers are classified on the basis of number of passes on each side and the flow arrangement in each channel, taking into account the end plate effects. This results in four configurations each for the 1–1 (1 Pass–1 Pass), 2–1, 2–2, 3–3, 4–1, 4–2, and 4–4 arrangements, and six configurations for the 3–1 arrangement. These arrangements are analyzed using the Gauss–Seidel iterative finite difference method; the plate arrangement that yields the highest effectiveness in each pass configuration is identified. Comprehensive results are presented in tabular form for the temperature effectiveness P1 and log-mean temperature difference correction factor F as functions of the number of transfer units NTU1, the heat capacity rate ratio R1, and the total number of thermal plates. On the basis of these results, specific guidelines are outlined for the selection of appropriate plate heat exchanger configurations.

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Heat Pipe Based Heat Exchanger for Clean Yerba Mate Drying Process

Waste Energy and Management ◽

10.18690/978-961-286-063-9.2 ◽

2017 ◽

Author(s):

Hussam Jouhara ◽

Theodora Nannou ◽

Bertrand Delpech ◽

Sulaiman Almahmoud ◽

Amisha Chauhan ◽

...

Keyword(s):

Heat Exchanger ◽

Heat Pipe ◽

Yerba Mate ◽

Drying Process

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Influence of the drying regime on the quality indicators of dry mare’s milk

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/937/2/022099 ◽

2021 ◽

Vol 937 (2) ◽

pp. 022099

Author(s):

S Yu Smolentsev ◽

L M Sufyanova ◽

A S Makarov ◽

N Yu Garafutdinova ◽

O I Shorkina ◽

...

Keyword(s):

Heat Treatment ◽

Quality Indicators ◽

Experimental Studies ◽

Quality Parameters ◽

Optimum Temperature ◽

Optimal Temperature ◽

Drying Process ◽

Milk Pasteurization ◽

Drying Regime ◽

Selection Of

Abstract The data on the influence of the temperature regime of the spray drying process on the quality parameters of dry mare’s milk are given. The results of experimental studies on the selection of the optimal drying mode for maximum preservation of the quality indicators of the final product are presented. It was revealed that the optimum temperature during the drying process of mare’s milk is the temperature at the entrance to the dryer t = 180°C, at the exit t = 70-80°C. The study of qualitative indicators with this drying mode showed that the particle size (more than 68%) was 117-140 microns, the solubility index was 0.18 ml of insoluble sediment in 50 ml of reconstituted mare’s milk, the moisture in dry mare’s milk was 3.8% (at t = 180°C), which met all the requirements of the standard. In addition, it was found that the correct heat treatment of mare’s milk before drying also affects the quality indicators of the dry product. The most optimal temperature for milk pasteurization is a temperature of no more than 60°C.

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The Freeze-Drying of Foods—The Characteristic of the Process Course and the Effect of Its Parameters on the Physical Properties of Food Materials

Foods ◽

10.3390/foods9101488 ◽

2020 ◽

Vol 9 (10) ◽

pp. 1488 ◽

Cited By ~ 1

Author(s):

Dorota Nowak ◽

Ewa Jakubczyk

Keyword(s):

Mechanical Properties ◽

Physical Properties ◽

Structural Properties ◽

Freeze Drying ◽

Process Conditions ◽

Drying Process ◽

High Quality ◽

Freeze Dried ◽

Secondary Drying ◽

Selection Of

Freeze-drying, also known as lyophilization, is a process in which water in the form of ice under low pressure is removed from a material by sublimation. This process has found many applications for the production of high quality food and pharmaceuticals. The main steps of the freeze-drying process, such as the freezing of the product and primary and secondary drying, are described in this paper. The problems and mechanisms of each step of the freeze-drying process are also analyzed. The methods necessary for the selection of the primary and secondary end processes are characterized. The review contains a description of the effects of process conditions and the selected physical properties of freeze-dried materials, such as structural properties (shrinkage and density porosity), color, and texture. The study shows that little attention is given to the mechanical properties and texture of freeze-dried materials obtained from different conditions of the lyophilization process.

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Basic design of a cooling system for nylon 6, 6 process

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.9421 ◽

2018 ◽

Vol 7 (3) ◽

pp. 977

Author(s):

Karthik Silaipillayarputhur Ph. D ◽

Nasser Al Mulhim ◽

Abdullah Al Mulhim ◽

Mohammed Arfaj ◽

Ahmed Al Naim

Keyword(s):

Heat Exchanger ◽

Rate Ratio ◽

Cooling System ◽

Ambient Air ◽

Nylon 6 ◽

Polymer Fibers ◽

Basic Design ◽

Quenching Process ◽

Pre Treatment ◽

Selection Of

The project concentrates on the basic design of a cooling system for rapidly cooling nylon 6, 6 polymer fibers using cold air. The ambient air after pre-treatment in the air-washer is available at 72°F all year round. Based on the company’s throughput, it is required to supply (quench) air at 58°F. Nylon 6, 6 polymer after thorough polymerization is distributed through 16 quench cabinets and each quench cabinet requires approximately 530 ft3/min (cubic feet per minute, CFM) of air. The project concentrates on the basic design of a cooling system wherein air at the required mass flow rate is supplied at 58°F for the quenching process. A basic design of the refrigeration cycle and heat exchangers were considered in this work. In the development of the basic design for heat exchanger, performance charts were developed. Performance charts describe the performance of the heat exchanger in terms of fundamental dimensionless parameters. Using performance charts it was clearly seen that increasing the number of transfer units (NTU) doesn’t necessarily increase the rate of heat transfer. Increasing the NTU beyond an optimum value is pointless and increases the capital cost of the heat exchanger. The preliminary design involves selection of appropriate NTU and capacity rate ratio for the heat exchanger. From the capacity rate ratio and NTU, it is fairly straight forward to extrapolate the detailed design for the heat exchanger. A cooling system model was developed for the design process and for the simulation of the cooling system.

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