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l water flowing at 14 kg.s¹ entering at 18 monia with a mass flow rate of 18 kg.s-¹ perature and pressure of -12°C and 650 L pectively. The heat exchanger is to use th he liquid form, so no evaporation can be kPa absolute ania Qu essure

l water flowing at 14 kg.s¹ entering at 18 monia with a mass flow rate of 18 kg.s-¹ perature and pressure of -12°C and 650 L pectively. The heat exchanger is to use th he liquid form, so no evaporation can be kPa absolute ania Qu essure

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter10: Heat Exchangers
Section: Chapter Questions
Problem 10.45P
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2. A single-shell, four-tube-pass heat exchanger is used to cool water flowing at 14 kg.s¹¹ entering at 18°C using ammonia with a mass flow rate of 18 kg.s¹ and an entry temperature and pressure of -12°C and 650 kPa, absolute, respectively. The heat exchanger is to use the ammonia in the liquid form, so no evaporation can be allowed. At 620 kPa, absolute pressure, ammonia evaporates at 10.5°C. The overall heat transfer coefficient of the heat exchanger is 568 W.m²2 and the heat transfer surface area is 75 m². Determine the outlet temperatures of the hot and cold streams. Identify whether the heat exchanger, operating under the conditions shown, satisfies the requirement that the ammonia remains liquid throughout the process.
Transcribed Image Text:2. A single-shell, four-tube-pass heat exchanger is used to cool water flowing at 14 kg.s¹¹ entering at 18°C using ammonia with a mass flow rate of 18 kg.s¹ and an entry temperature and pressure of -12°C and 650 kPa, absolute, respectively. The heat exchanger is to use the ammonia in the liquid form, so no evaporation can be allowed. At 620 kPa, absolute pressure, ammonia evaporates at 10.5°C. The overall heat transfer coefficient of the heat exchanger is 568 W.m²2 and the heat transfer surface area is 75 m². Determine the outlet temperatures of the hot and cold streams. Identify whether the heat exchanger, operating under the conditions shown, satisfies the requirement that the ammonia remains liquid throughout the process.
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