(Fixed, Floating, and U-Tube)
The conditions grid is a repository for tubesheet design cases. Values entered here will overrule values entered on previous tabs. For example, if shell pressure on this tab is 15 PSI and shell pressure on the shell tab is 50 PSI, 15 PSI will be used in the calculations; however, a value entered on the conditions grid will not change the value on any other tab.
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Shell T's: The metal temperature of the shell at the tubesheet as rim as expected during the case under consideration (e.g., Operating, Startup, Shutdown, etc). It is usually not conservative to substitute the shell design temperature for T's. This value is only required for radial differential thermal expansion calculations.
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Tube Ttm: The mean tube temperature along the tube length as expected during the case under consideration (e.g., Operating, Startup, Shutdown, etc); this considers the entire tube bundle. It is generally not conservative to substitute the tube design temperature for Ttm.
(T'c): The metal temperature of the channel at the tubesheet rim as expected during the case under consideration (e.g., Operating, Startup, Shutdown, etc). It is generally not conservative to substitute the channel design temperature for T'c. This value is only required for radial differential thermal expansion calculations.
(T'): The metal temperature of the tubesheet at the rim as expected during the case under consideration (e.g., Operating, Startup, Shutdown, etc). It is usually not conservative to substitute the tubesheet design temperature for T'. This value is only required for radial differential thermal expansion calculations.
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