Title:
APPARATUS AND PROCESS FOR DETECTING CONDENSATION IN A HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2005/108863
Kind Code:
A1
Abstract:
A feedwater heater (14) for an HRSG (A) is provided with a monitoring unit (B) for detecting the presence of condensation in the feedwater heater. The monitoring unit includes a dielectric band (50) around one of the tubes (26) of the feedwater heater near the location where the feedwater is directed into the heater and a conductive band (52) located around the dielectric band. The unit also includes a conductivity sensor (44) installed between a ground (40) on the feedwater heater and the conductive element. Hot gas containing moisture passes through the feedwater heater, and if the temperature of surfaces in the region of the tube around which the dielectric and conductive bands extend drops below the dew point of the gas, an electrically conductive condensate will appear those surfaces and on the tube and will flow over the dielectric band, completing an electric circuit between the tube and the conductive band. The conductivity sensor detects this and hence detects the presence of the condensation.
Inventors:
SCHROEDER JOSEPH E (US)
Application Number:
PCT/US2005/010190
Publication Date:
November 17, 2005
Filing Date:
March 25, 2005
Export Citation:
Assignee:
NOOTER ERIKSEN INC (US)
SCHROEDER JOSEPH E (US)
SCHROEDER JOSEPH E (US)
International Classes:
F02C6/00; F02G1/00; F02G3/00; F22B37/02; F24H9/00; F28F19/00; G01R27/26; (IPC1-7): F22B37/02; F24H9/00
Foreign References:
| EP0434395A1 | 1991-06-26 | |||
| AT390073B | 1990-03-12 | |||
| EP0400370A2 | 1990-12-05 | |||
| US4611652A | 1986-09-16 |
Attorney, Agent or Firm:
Boeschenstein, Edward A. (L.C. 12412 Powerscourt Drive, Suite 20, St. Louis Missouri, US)
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