An approximate thermal-flow model of a regenerative heater
Rafał Laskowski , Adam Smyk
In the paper the performance of a high-pressure regenerative heater, being a shell-tube heat exchanger containing a desuperheater, a condensation zone and a condensate cooler, was analyzed. An extensive mathematical model (a simulator) of such exchanger was developed, with a division into three heat exchange zones. Based on the data from the regenerative heater simulator, an approximate relation was proposed to describe the exchanger heat transfer effectiveness as a function of the water temperature at the inlet, the saturation temperature of the bleed steam, and the feed water mass flow rate, with four constant coefficients. The applicability of the proposed relation was verified against the data obtained using the simulator and the real measurement data of a regenerative heater (HE3) supplied by the first bleed of a 200-MW turbine. A good agreement was achieved between the heat transfer effectiveness as calculated from the definition and from the approximate relation. The proposed relation may be used in diagnostics as a reference function for assessing the performance of regenerative heaters in a unit thermal system. Using the simulator to create analogous simple models may be applicable for any regenerative heaters if no required measurement data are available.
|Journal series||Rynek Energii, ISSN 1425-5960|
|Score|| = 9.0, 29-10-2019, ArticleFromJournal|
= 11.0, 29-10-2019, ArticleFromJournal
|Publication indicators||= 4; : 2013 = 0.563; : 2010 = 0 (2)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.