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lower the temperature of nitrogen. Assume that ses have constant specific heat values: gen 1.042 kJ/kg. K) and Cpo of helium = 5.1 =

lower the temperature of nitrogen. Assume that ses have constant specific heat values: gen 1.042 kJ/kg. K) and Cpo of helium = 5.1 =

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Nitrogen gas flows through a compressor and a heat exchanger as shown in the figure below. All the provided properties at the inlets and outlets of both devices are shown. Nitrogen is modeled as an ideal gas. A separate cooling stream of Helium, also modeled as ideal gas, flows through the heat exchanger to lower the temperature of nitrogen. Assume that both devices are perfectly insulated and both gasses have constant specific heat values: Cpo of nitrogen = 1.042 kJ/kg. K) and Cpo of helium = 5.193 kJ/kg.K) A. Identify the systems, the process that each system goes through, and the assumptions you need to make for each process. B. Find the temperature of nitrogen at the exit of the compressor (T2) C. Determine the mass flow rate of the helium. 50 kW Compressor N₂ P₁ = 100 kPa T₁ = 280 K m₁ = 0.25 kg/s T₁ = 175°C +5 Helium 4+T4= 4+T4=25°C www www. T3 = 350 K Heat exchanger
Transcribed Image Text:Nitrogen gas flows through a compressor and a heat exchanger as shown in the figure below. All the provided properties at the inlets and outlets of both devices are shown. Nitrogen is modeled as an ideal gas. A separate cooling stream of Helium, also modeled as ideal gas, flows through the heat exchanger to lower the temperature of nitrogen. Assume that both devices are perfectly insulated and both gasses have constant specific heat values: Cpo of nitrogen = 1.042 kJ/kg. K) and Cpo of helium = 5.193 kJ/kg.K) A. Identify the systems, the process that each system goes through, and the assumptions you need to make for each process. B. Find the temperature of nitrogen at the exit of the compressor (T2) C. Determine the mass flow rate of the helium. 50 kW Compressor N₂ P₁ = 100 kPa T₁ = 280 K m₁ = 0.25 kg/s T₁ = 175°C +5 Helium 4+T4= 4+T4=25°C www www. T3 = 350 K Heat exchanger
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