안녕하세요. air cooler회사 신입사원입니다.

HTRI를 돌렸는데 아래와 같은 message가 뜨네요

이유가 뭐죠???

----------------------------------------------------------------------------------------------------

Based on the standard deviation of the Duty Ratio in each increment, the case may not be converged properly.  Nonconvergence usually results from an           
incorrect bundle layout, such as a case with only one or two tubes in a pass on one or more of the rows.  The duty ratio is the assumed duty divided by the           
calculated duty in each increment; the values should be approximately the same for all increments in the exchanger if the case is properly converged.           
           
To check convergence after the case has run.           
           
1.  Click the Graphs tab.           
           
2.  Select Output 3D Profiles.           
           
3.  Plot the Duty Ratio.           
           
If the values in the plot are not within 10%, the case has not converged properly.  Check the bundle layout to ensure that the tubes in the unit are properly           
positioned; the Equal count bundle layout option may result in an unrealistic bundle geometry.  If the unit layout is not as you intended, correct the bundle and           
run the case again.  If you receive this message and the unit is as you intended, do not use the results.  Instead, please e-mail the case to Support@HTRI.net           
for analysis.