Food technology is a blanket term for applying food science techniques and principles to the cultivation, production, processing, packaging, labeling, quality management, and distribution of food substances. Much of the food we eat and drink is made
Food manufacturing transforms livestock and agricultural products into products for consumption. It involves businesses that collect raw food materials and process them into edible products. It processes a wide range of food and drinks to cater to th
Marketing may be regarded as comprising four key elements known as the 4 Ps product, price, place and promotion. Food marketing describes any form of advertising used to promote the purchase and or consumption of a food or beverage. It can influence
Food technology is a blanket term for applying food science techniques and principles to the cultivation, production, processing, packaging, labeling, quality management, and distribution of food substances. Much of the food we eat and drink is made
Food hygiene is fundamentally important. It plays a major role in ensuring food safety. Poor food hygiene practice can lead to food poisoning. Food premises posting poor hygiene scores as practiced in UK will su er negative economic e ects as consume
Food fraud is a major problem with all food and drink businesses. It has become a global problem of increasing importance. Fraud may be regarded as the intentional misrepresentation of fact by one person or an organization. Food fraud is the delibera
Food hygiene is fundamentally important. It plays a major role in ensuring food safety. Poor food hygiene practice can lead to food poisoning. Food premises posting poor hygiene scores as practiced in UK will su er negative economic e ects as consume
Food science is the discipline that applies basic sciences and engineering to study the nature of foods and their harvesting, processing, distribution, storage, and preparation. It is essential to meeting the needs of a growing global population. A m
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The importance of food is increasingly included on the urban agenda in many nations. Food systems consists of the various processes and infrastructures involved in feeding the society, including growing and harvesting, production, processing, transpo
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As markets grow from local to global, food supply chains become complex distribution systems and pose the challenge of safeguarding our food supply. Food fraud is an emerging global problem with wide range of economic, social, health, and environment
Food waste is a major, highly visible global problem. It has recently attracted much attention in the world and has become a priority in the global political agenda. Food waste occurs at different stages of a food value chain, including agriculture,
A food storage locker requires a refrigeration capacity of 50 KW.it works between a condenser o
temperature of 35 c and an evaporator temperature of -10
o
C .the refrigerant is ammonia. It is sub
o
cooled by 5 C before entering the expansion valve by the dry saturated vapour leaving the evaporation. Assuming a single cylinder, single acting compressor operating at 1000 rpm with stroke equal to 1.2 times of the bore, Determine (i) the power required (ii) the cylinder dimensions. Properties of ammonia are Saturati on Temp o ( C)
Pressure (bar)
-10 35
2.9157 13.522
Enthalpy (KJ/Kg)
Entropy (KJ/KgK)
liquid
liquid
154.856 366.072
vapour 1450.22 1488.57
Specific volume 3 (m /kg)
Specific heat (KJ/KgK)
liquid
vapor
liquid
vapor
-1.7023
0.417477 .099562
-4.556
2.492 2.903
vapor
.82965 1.56605
5.75550 5.2086
(or) Explain briefly about ammonia –water vapor absorption refrigeration system with neat schematic diagram.
(8)
Show the vapor compression cycle cycle on T-S And p-h diagram for the following following cases. (i)When the vapor is super heated before the compression (ii) When the vapor is dry and saturated at the end of compression (iii) When the vapor is dry and saturated at the before compression and super saturated at the end of compression
(8)
A two stage double acting air compressor operating at 220 rpm takes in air at 1 bar and 27 oC .the size of the L.P cylinder is 360x 400 mm .the storke of H.P cylinder is the same as that of the L.P cylinder and the clearance of both the t he cylinders is 4% .the air passes through t he intercooler so that if enters the H.P cylinder at 27 o C and 3.8 bar,finally it is dischared from the compressor at 15.2 bar.the value of n in both the cylinder is 1.3. Cp=1.0035 KJ/KgK and R- .287 KJ/KgK. Calculate (i) the heat rejected in the intercooler (ii) Diameter of H.P cylinder (iii) The power required to drive H.P cylinder.
(16) (or) 3
A single stage double acting compressor has a free delivery (FAD) of 14 m /min measured at 1.013 bar o
&15oC. The pressure and temperature in the cylinder during in suction are 0.95 bar 32 C. The delivery pressure is 7 bar and index o f compression and expansion n=1.3. The clearance volume is 5% of the swept volume. Calculate (1) indicated power required. (ii) Volumetric efficiency.
(10)
A 4 cylinder double acting compressor is required to compress 30 m3/min of air at 1 bar and 27o C to a pressure of 16 bar,determine the size of moter required and cylinder dimensions if the following data is given . Speed of the c ompressor N=320 rpm,clearance volume Vc= 4%,stroke to bore ratio (L/D)=1.2,
η mech =
82% ,value of index n=1.32. Assume no pressure change in suction valves and the air gets o
heated by 12 C during suction stroke. What is meant by refrigerant? Define co efficient of performance for refrigerator? What is slip factor & pressure co efficient? What do you mean by surging and choking?
