A counterflow. concentric tube heat exchanger is designed to heat water from 22 to 80 deg C using hot oil.which is supplied to the annulus at 162 deg C and discharged at 140 deg C. The thin-walled...

Extracted text: A counterflow. concentric tube heat exchanger is designed to heat water from 22 to 80 deg C using hot oil.which is supplied to the annulus at 162 deg C and discharged at 140 deg C. The thin-walled inner tube has a diameter of Di=22 mm and the overall heat transfer coefficient is 500 W/m2. K. The design condition calls for a total heat transfer rate of 3200 W. What is the length of the heat exchanger? Select one: O a. 0.76999 O b. 0.90938 O c. 1.2028 O d. 0.93619 Mater enters at 20r ata cate of 01 kale in.a double..nine.counter flow.beat.exchanger is to be beated bu hot air that