H2. Cross Flow Heat Exchanger.pdf - H2 Cross Flow Heat Exchanger Dr Aldoss H2 Cross Flow Heat Exchanger Overall Objective This laboratory exercise is

H2. Cross Flow Heat Exchanger.pdf - H2 Cross Flow Heat...

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3/10/2019 1 H2. Cross Flow Heat Exchanger Dr. Aldoss H2: Cross Flow Heat Exchanger Overall Objective: This laboratory exercise is used to investigate the convection heat transfer Coefficient, which occurs in a cross flow heat exchanger. The performance of a cross flow heat exchanger is largely dependent on the configuration of the tubes across the duct and the speed of the cooling air flowing within the duct. Additionally, the overall performance of any heat exchanger must involve a determination of the static pressure drop through the apparatus.
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3/10/2019 2 The cross flow heat exchanger apparatus is shown in Figure 1 and consists of a fan and duct assembly. The centrifugal fan draws air into the duct through a flared entry and exhausts upward through the vertical duct above the fan unit. Mounted in the middle of the duct assembly is a clear acrylic test section. The air speed through the duct is varied via changing the speed of the fan. The air speed in the duct is determined by measuring the static and total pressures of the flow using pressure taps and a manometer. Two static pressure taps are provided at the front and rear of the test section (on the bottom side). A moveable total pressure probe can be used to measure the total pressure at several points in the working section. A schematic diagram of the test section is shown in Figure 2. One or more acrylic rods (… mm diameter) may be inserted into the test section with their axes at right angles to the direction of flow (i.e. the rod is said to be in cross flow ).
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