This set of Heat Transfer Operations Multiple Choice Questions & Answers (MCQs) focuses on “Types of Condensers”.
Explanation: The bed is stable and at a low height, hence the given figure is packed column. If it had been in free state, it would have been a fluidised column.
Explanation: The tube side condenser is a special condenser in which the coolant flows in the shell and the condensation in the tubes, hence the name tube side condenser. It cannot usually handle high pressure drops.
Explanation: The sparged tube condenser consists of a perforated tube/ pipe with holes for injecting bubbles of vapour into a pool of liquid. The condensate being immiscible float at the top of the coolant, or maybe the coolant is the same material as the vapour.
Explanation: The spray type condenser is actually a direct contact condenser where in which the coolant and gas come in direct contact as the coolant is sprayed with the use of nozzles in a vessel filled with the vapour.
Explanation: The baffled column condenser is similar to the spray condenser, with the difference that the coolant is directed to flow over a set of trays in a column. The vapour is supplied from the bottom as shown in the diagram.
Explanation: The air cooled condensers are a separate category of condensers which use air as the cooling medium, it may be natural/forced convection air cooled condensers. As an example for this being the commonly used indoor refrigerators and air conditioners.
Explanation: The jet condenser is a device in which a jet of coolant liquid forced into a hot vapour stream, de-superheating the vapour and hence condensing it. Here a jet of liquid is injected into a vessel carrying vapour via a plate/pipe and a nozzle located at the centre axis.
Explanation: The shell side condenser is a special condenser in which the coolant flows in the tubes and the condensation happens in the shell, hence the name shell side condenser. This condenser can handle large pressure drops.
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