A thin-walled, double-tube, counterflow heat exchanger is used to cool oil (Cp = 2.20 kJ/kg °C) from 150 to 40°C at a rate of 2 kg/s by means of water (Cp = 4.18 kJ/ kg °C), which enters at 22°C at a rate of 1.5 kg/s. Determine the rate of heat transfer in the exchanger and the leaving temperature of the water. Aguafría1.5 kg/s22°C40°CAceite caliente2 kg/s 150°C A thin-walled, double-tube, counterflow heat exchanger is used to cooloil (Cp = 2.20 kJ/kg °C) from 150 to 40°C at a rate of 2 kg/s by meansof water (Cp = 4.18 kJ/ kg °C), which enters at 22°C at a rate of 1.5kg/s. Determine the rate of heat transfer in the exchanger and theleaving temperature of the water.

Answered: n-walled, double-tube, counterflow heat…

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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A thin-walled, double-tube, counterflow heat exchanger is used to cool oil (Cp = 2.20 kJ/kg °C) from 150 to 40°C at a rate of 2 kg/s by means of water (Cp = 4.18 kJ/ kg °C), which enters at 22°C at a rate of 1.5 kg/s. Determine the rate of heat transfer in the exchanger and the leaving temperature of the water.

Agua
fría
1.5 kg/s
22°C
40°C
Aceite caliente
2 kg/s 150°C

Expert Solution

Step 1

Given data as per question

For Hot fluid , oil

$C_{p_{h}} = 2.2 kJ / kg ° C, T_{h_{i}} = 150 ° C, T_{h_{o}} = 40 ° C, \dot{m} = 2 kg / s$

For Cold fluid, Water

$C_{p_{c}} = 4.18 kJ / kg ° C, T_{c_{i}} = 22 ° C, T_{c_{o}} = ?, \dot{m} = 1.5 kg / s$

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