Q. A steam condenser is transferring 250 k W of thermal energy at a condensing temperature of 65 degree Celsius. The cooling water enters the condenser at 20 degree Celsius with a flow rate of 7500 kg/hr. If overall heat transfer coefficient for the condenser surface is 1250 W/m² K, what surface area is required to handle this load?

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Q. Exhaust gases (c P = 1.12 k J/kg K) flowing through a tubular heat exchanger at the rate of 1200 kg/hr are cooled from 400 degree Celsius to 120 degree Celsius. This cooling is affected by water (c P = 4.18 k J/kg K) that enters the system at 10 degree Celsius at the rate of 1500 kg/hr. If the overall heat transfer coefficient is 500 k J/m² hr degree, what heat exchanger area is required to handle the load for counter flow arrangement?

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Q. What is the value of specific heat for brick in J/kg K?

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Q. Which one is having highest value of specific heat?

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Q. What is the value of specific heat for asphalt in J/kg K?

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Q. What is the value of specific heat for Bakelite in J/kg K?

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Q. Which one is having lowest value of specific heat?

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Q. What is the value of specific heat for coal in J/kg K?

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Q. What is the value of specific heat for cotton in J/kg K?

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Q. What is the value of specific heat for sand in J/kg K?

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Q. Which one is having highest value of overall heat transfer coefficient?

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Q. What is the value of overall heat transfer coefficient for air to heavy tars and liquid?

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Q. What is the value of overall heat transfer coefficient for air to low viscosity liquid?

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Q. Which one is having lowest value of overall heat transfer coefficient?

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Q. What is the value of overall heat transfer coefficient for air condensers?

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Q. What is the value of overall heat transfer coefficient ammonia condensers?

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Q. What is the value of overall heat transfer coefficient for steam condensers?

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Q. Capacity ratio is defined as the product of

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Q. Which of the following is not associated with heat exchanger?

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Q. The engine oil at 150 degree Celsius is cooled to 80 degree Celsius in a parallel flow heat exchanger by water entering at 25 degree Celsius and leaving at 60 degree Celsius. Estimate the exchanger effectiveness

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