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Q:

Which of the following is the correct definition of condenser efficiency?

A) It is the ratio of the difference between the outlet and the inlet temperatures of cooling water to the difference between the temperature correspondi B) It is the ratio of the difference between the temperature corresponding to the vacuum in the condenser and inlet temperature of cooling water to the d
C) It is the ratio of the difference between the atmospheric pressure and the absolute pressure inside the condenser to the difference between the atmosp D) It is the ratio of the difference between the actual pressure inside the condenser and the partial pressure of the steam to the atmospheric pressure
 
Answer & Explanation Answer: A) It is the ratio of the difference between the outlet and the inlet temperatures of cooling water to the difference between the temperature correspondi

Explanation: Condenser efficiency is defined as the ratio of the difference between the outlet and the inlet temperatures of cooling water to the difference between the temperature corresponding to the vacuum in the condenser and inlet temperature of cooling water.

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Category: Mechanical Engineering MCQs
Sub Category: Thermal Engineering Mcqs

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The inlet and outlet temperatures of cooling water to a certain condenser are recorded to be 30°C and 40°C respectively. If the absolute pressure in the condenser is given to be 0.11 bar, determine efficiency.

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Inlet temperature of cooling water = 36°C
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Determine the amount of cooling water required, if the condenser (surface condenser) deals with 15000 kg of steam per hour. The steam is dry and has a latent heat of 2432 kJ per kg. The temperature of condensate is 20°C is less than the steam temperature. Also, the rise is cooling water temperature is 10°C. Take specific heat of water at constant pressure as 4.186 kJ/kg-°C.

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A jet condenser is designed to handle 12000 kg of dry and saturated steam per hour. The steam enters the condenser at 38°C (dry and saturated), and the condensate leaves the condenser at 32°C. If the inlet temperature of cooling water is 10°C, find out the mass of cooling water required in kg per hour. Take latent heat of steam as 2300 kJ/kg and specific heat at constant pressure as 4.186 kJ/kg-°C.

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In a jet condenser, the difference between the temperature of steam (dry and saturated) entering the condenser and the condensate leaving the condenser is 4°C. The amount of cooling water required and the mass of steam being supplied to the condenser are 900000 kg/hr and 12000 kg/hr. Take the latent heat of water to be 2300 kJ/kg and the specific heat at constant pressure to be 4.186 kJ/kg-K. If the temperature of cooling water entering the condenser is 26°C, determine the temperature of cooling water leaving the condenser.

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