An approximate thermal-flow model of a regenerative heater

Rafał Laskowski , Adam Smyk

Abstract

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.

Author Rafał Laskowski (FPAE / IHE)
Rafał Laskowski,,
- The Institute of Heat Engineering
, Adam Smyk (FPAE / IHE)
Adam Smyk,,
- The Institute of Heat Engineering
Journal seriesRynek Energii, ISSN 1425-5960
Issue year2013
Vol107
Pages77-82
ASJC Classification2100 General Energy; 2600 General Mathematics
Languageen angielski
Score (nominal)11
Score sourcejournalList
ScoreMinisterial score = 9.0, 29-10-2019, ArticleFromJournal
Ministerial score (2013-2016) = 11.0, 29-10-2019, ArticleFromJournal
Publication indicators Scopus Citations = 4; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 0.563; WoS Impact Factor: 2010 = 0 (2)
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