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clear answer In a biomass processing plant, an engineer plans to use a cross-flow heat exchanger to recover heat form hot air to pre-heat water as in Figure 5a. The total surface area is about 10 m² while its overall heat transfer coefficient is 0.2116 W/m².°C The hot air flows into the heat exchanger at a temperature of 100°C, 0.92 kg/s to pre-heat water which enters at 30°C with a flow rate of 0.42 kg/s. If the specific heats of hot air and water can be taken as Cp,air= 1.01 kJ/kg°C and Cp,water = 4.18 kJ/kg°C respectively, determine: i) ii) iii) iv) the effectiveness of the heat exchanger; the heat exchange rate between hot air and water; the outlet temperatures of bot hot air and water; and state two (2) parameters that you adjust to increase the heat transfer rate without changing the heat exchanger's design. Air flow (unmixed) O Water flow (unmixed)

clear answer In a biomass processing plant, an engineer plans to use a cross-flow heat exchanger to recover heat form hot air to pre-heat water as in Figure 5a. The total surface area is about 10 m² while its overall heat transfer coefficient is 0.2116 W/m².°C The hot air flows into the heat exchanger at a temperature of 100°C, 0.92 kg/s to pre-heat water which enters at 30°C with a flow rate of 0.42 kg/s. If the specific heats of hot air and water can be taken as Cp,air= 1.01 kJ/kg°C and Cp,water = 4.18 kJ/kg°C respectively, determine: i) ii) iii) iv) the effectiveness of the heat exchanger; the heat exchange rate between hot air and water; the outlet temperatures of bot hot air and water; and state two (2) parameters that you adjust to increase the heat transfer rate without changing the heat exchanger's design. Air flow (unmixed) O Water flow (unmixed)

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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clear answer In a biomass processing plant, an engineer plans to use a cross-flow heat exchanger to recover heat form hot air to pre-heat water as in Figure 5a. The total surface area is about 10 m² while its overall heat transfer coefficient is 0.2116 W/m².°C The hot air flows into the heat exchanger at a temperature of 100°C, 0.92 kg/s to pre-heat water which enters at 30°C with a flow rate of 0.42 kg/s. If the specific heats of hot air and water can be taken as Cp,air= 1.01 kJ/kg°C and Cp,water = 4.18 kJ/kg°C respectively, determine: i) ii) iii) iv) the effectiveness of the heat exchanger; the heat exchange rate between hot air and water; the outlet temperatures of bot hot air and water; and state two (2) parameters that you adjust to increase the heat transfer rate without changing the heat exchanger's design. Air flow (unmixed) 00 оо Water flow (unmixed)
Transcribed Image Text:clear answer In a biomass processing plant, an engineer plans to use a cross-flow heat exchanger to recover heat form hot air to pre-heat water as in Figure 5a. The total surface area is about 10 m² while its overall heat transfer coefficient is 0.2116 W/m².°C The hot air flows into the heat exchanger at a temperature of 100°C, 0.92 kg/s to pre-heat water which enters at 30°C with a flow rate of 0.42 kg/s. If the specific heats of hot air and water can be taken as Cp,air= 1.01 kJ/kg°C and Cp,water = 4.18 kJ/kg°C respectively, determine: i) ii) iii) iv) the effectiveness of the heat exchanger; the heat exchange rate between hot air and water; the outlet temperatures of bot hot air and water; and state two (2) parameters that you adjust to increase the heat transfer rate without changing the heat exchanger's design. Air flow (unmixed) 00 оо Water flow (unmixed)
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