Title:
DUAL ENHANCED TUBE FOR VAPOR GENERATOR
Document Type and Number:
WIPO Patent Application WO/2011/043779
Kind Code:
A4
Abstract:
A heat exchange assembly for generating steam from a second medium to be used to drive a steam turbine for generating electricity or for other process, includes a tube having a longitudinal axis and an inner wall and an outer wall. The outer wall includes a plurality of spaced fins oriented generally perpendicular to the longitudinal axis. The inner wall defines a preheat zone and a dual phase zone. The preheat zone defines a helical rib configured to provide swirling motion and increase heat transfer surface area to liquid entering the tube increasing heat transfer from the tube to the liquid. The dual phase zone is spaced from the preheat zone and defines a helical rib configured to provide swirling motion to steam and liquid passing through the dual phase zone increasing heat transfer from the tube to the steam and liquid while preventing vapor stagnation and film boiling.
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Inventors:
MASTER BASHIR I (US)
RANADE BHUSHAN (US)
RANADE BHUSHAN (US)
Application Number:
PCT/US2009/060184
Publication Date:
June 03, 2011
Filing Date:
October 09, 2009
Export Citation:
Assignee:
HAMON RES COTTRELL INC (US)
MASTER BASHIR I (US)
RANADE BHUSHAN (US)
MASTER BASHIR I (US)
RANADE BHUSHAN (US)
International Classes:
F28D7/16; F28F1/26; F28F1/40; F28F1/42; F28F13/12; F28F13/14; F28F13/18
Attorney, Agent or Firm:
AMBURN, Dean, W. et al. (450 West Fourth StreetRoyal Oak, MI, US)
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