With the help of the description methods in graph theory and the adaptive adjustment method, a steady sate simulation model for fin-and-tube heat exchanger with complex circuit arrangement was developed.This model cou...With the help of the description methods in graph theory and the adaptive adjustment method, a steady sate simulation model for fin-and-tube heat exchanger with complex circuit arrangement was developed.This model could provide better compatibility and accuracy for the design of heat exchanger with complex circuit arrangement.Using this model, six typical fin-and-tube heat exchangers with different circuit arrangements were analyzed.The counter flow arrangement could not always achieve the best performance.With appropriate compound arrangement, the performance of heat exchanger could be improved by 2%—4%.展开更多
Curve fitting method is often used in the test of heat transfer performance of heat exchangers.The convective heat transfer coefficient may be obtained with the method.However,there are defects with the method.The new...Curve fitting method is often used in the test of heat transfer performance of heat exchangers.The convective heat transfer coefficient may be obtained with the method.However,there are defects with the method.The new curve fitting method introduced in this paper is a practical method for test of convective heat transfer coefficient.There are few constraint with the method.Moreover,the results are more precise and the test is more convenient.The method is expecially suitable for test of convective heat transfer coefficient of finned tubes outer surface.An instance of use of the method is given.展开更多
文摘With the help of the description methods in graph theory and the adaptive adjustment method, a steady sate simulation model for fin-and-tube heat exchanger with complex circuit arrangement was developed.This model could provide better compatibility and accuracy for the design of heat exchanger with complex circuit arrangement.Using this model, six typical fin-and-tube heat exchangers with different circuit arrangements were analyzed.The counter flow arrangement could not always achieve the best performance.With appropriate compound arrangement, the performance of heat exchanger could be improved by 2%—4%.
文摘Curve fitting method is often used in the test of heat transfer performance of heat exchangers.The convective heat transfer coefficient may be obtained with the method.However,there are defects with the method.The new curve fitting method introduced in this paper is a practical method for test of convective heat transfer coefficient.There are few constraint with the method.Moreover,the results are more precise and the test is more convenient.The method is expecially suitable for test of convective heat transfer coefficient of finned tubes outer surface.An instance of use of the method is given.
