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Some examples of heat exchanger are
(i) Condensers and evaporators in refrigeration units
(ii) Evaporator of an ice plant and milk chiller of a pasteurizing plant
(iii) Automobile radiators and oil coolers of heat engines
Identify the correct answer
(i) Condensers and evaporators in refrigeration units
(ii) Evaporator of an ice plant and milk chiller of a pasteurizing plant
(iii) Automobile radiators and oil coolers of heat engines
Identify the correct answer
- a)1 only
- b)2 and 3
- c)1, 2 and 3
- d)1 and 2
Correct answer is option 'C'. Can you explain this answer?
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Some examples of heat exchanger are(i) Condensers and evaporators in r...
All are the examples of heat exchanger.
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Some examples of heat exchanger are(i) Condensers and evaporators in r...
Heat exchangers are devices used to transfer heat from one fluid to another. They are widely used in various industries such as refrigeration, power generation, chemical processing, and food processing. The correct answer is option 'C', which means all the given examples are types of heat exchangers. Let's discuss each example in detail.
(i) Condensers and evaporators in refrigeration units: Refrigeration units use a cycle of compression, condensation, expansion, and evaporation to remove heat from a space or substance. Heat exchangers called condensers and evaporators are used to transfer heat between the refrigerant and the surrounding environment. The condenser removes heat from the refrigerant by condensing it from a vapor to a liquid, while the evaporator absorbs heat by evaporating the liquid refrigerant into a vapor.
(ii) Evaporator of an ice plant and milk chiller of a pasteurizing plant: These are examples of shell-and-tube heat exchangers, which consist of a bundle of tubes inside a shell. In an ice plant evaporator, warm water is circulated through the tubes, and the refrigerant is circulated outside the tubes. As the refrigerant evaporates, it absorbs heat from the water, which cools down and freezes into ice. In a milk chiller, hot milk is circulated through the tubes, and cold water is circulated outside the tubes. As the water absorbs heat from the milk, it becomes warmer, while the milk becomes cooler and is ready for pasteurization.
(iii) Automobile radiators and oil coolers of heat engines: These are examples of air-cooled heat exchangers, which use air as the cooling medium. In an automobile radiator, hot coolant from the engine is circulated through the tubes, and air is forced through the fins of the radiator to cool down the coolant. In an oil cooler, hot oil from the engine is circulated through the tubes, and air is forced through the fins of the cooler to cool down the oil.
In conclusion, heat exchangers are essential components in many industrial processes that involve heat transfer. The examples given in the question are just a few of the many types of heat exchangers that exist.
(i) Condensers and evaporators in refrigeration units: Refrigeration units use a cycle of compression, condensation, expansion, and evaporation to remove heat from a space or substance. Heat exchangers called condensers and evaporators are used to transfer heat between the refrigerant and the surrounding environment. The condenser removes heat from the refrigerant by condensing it from a vapor to a liquid, while the evaporator absorbs heat by evaporating the liquid refrigerant into a vapor.
(ii) Evaporator of an ice plant and milk chiller of a pasteurizing plant: These are examples of shell-and-tube heat exchangers, which consist of a bundle of tubes inside a shell. In an ice plant evaporator, warm water is circulated through the tubes, and the refrigerant is circulated outside the tubes. As the refrigerant evaporates, it absorbs heat from the water, which cools down and freezes into ice. In a milk chiller, hot milk is circulated through the tubes, and cold water is circulated outside the tubes. As the water absorbs heat from the milk, it becomes warmer, while the milk becomes cooler and is ready for pasteurization.
(iii) Automobile radiators and oil coolers of heat engines: These are examples of air-cooled heat exchangers, which use air as the cooling medium. In an automobile radiator, hot coolant from the engine is circulated through the tubes, and air is forced through the fins of the radiator to cool down the coolant. In an oil cooler, hot oil from the engine is circulated through the tubes, and air is forced through the fins of the cooler to cool down the oil.
In conclusion, heat exchangers are essential components in many industrial processes that involve heat transfer. The examples given in the question are just a few of the many types of heat exchangers that exist.
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