Document Type
Thesis
Date of Award
5-31-1963
Degree Name
Master of Science in Chemical Engineering - (M.S.)
Department
Chemical Engineering
First Advisor
Herbert Dengler
Second Advisor
C. L. Mantell
Third Advisor
Jerome J. Salamone
Abstract
Control of a condensing steam heat exchanger by condensate throttling was investigated theoretically by a frequency response analysis. The theoretical analysis was verified by experimental operation of the heat exchanger.
The system was characterized by heat transfer calculations and Laplace transform functions. The transfer functions were used to complete a frequency response analysis of the system which predicted the controller settings, the stability of the system and its response to a step set point change. The calculations were verified by experimental operation and reasonable agreement was obtained.
It was calculated that condensate throttling can be used to obtain stable control providing several important requirements are met:
1. That the dead time of the exchanger be small in comparison to the time constant of the exchanger.
2. That the total lag time of the exchanger is small in comparison to the time constant of the process that the exchanger serves.
3. That the frequency range of input disturbances be kept to low frequencies.
Recommended Citation
Fornoff, Louis F., "The investigation of frequency response and stability of a heat exchanger under condensate control" (1963). Theses. 2785.
https://digitalcommons.njit.edu/theses/2785
