Apr 18, The Heat Exchange Institute (HEI) has released the 12th edition of Standards for Steam Surface Condensers. The latest edition represents. Jan 1, Standards for Steam Surface Condensers, 12th Edition. Priced From $ HEI Tech Sheet # Priced From $ The Eleventh Edition of the “Standards for Steam Surface Condensers” represents another step in the Heat Exchange Institute’s continuing program to provide.
|Published (Last):||9 August 2008|
|PDF File Size:||15.66 Mb|
|ePub File Size:||8.65 Mb|
|Price:||Free* [*Free Regsitration Required]|
New standards for steam surface condensers released
Click here to Renew Now. As a result, the condensation heat transfer coefficient is usually higher than that on the liquid coolant side, the latter becoming the controlling process. The Institute concentrates its efforts on the manufacturing and engineering aspects of steam surface condensers, closed feedwater heaters, power plant heat exchangers, liquid ring vacuum pumps, steam jet ejectors, deaerators, and air cooled condensers.
This 12th edition of Standards for Steam Surface Condensers primarily updates the previous edition with new revisions and insights on FM tube material, gauge correction factors, pressure design equations, nuclear hhei, condenser hotwells, atmosphere relief devices, vacuum breaker valves, condenser tube cleaning, steam inlet expansion joints, waterbox coating, lay-up procedure, and frequently asked questions.
The essential objective in surface condenser design is to provide equal access of vapor to all the surface. Surprisingly, there appears to be no optimum arrangement of tubes, the wide variety of nest configurations in service being shown by Lang If nonwetting can be maintained e.
Condenser HEI Calculations
The Heat Exchange Institute HEI Standards for Steam Surface Condensers were promulgated to design and predict the performance surfaace surface condensers for power plant applications by providing basic overall tube bundle heat transfer rates and correction factors to be applied to account for different tube diameters, wall thicknesses BWGtube materials, circulating water inlet temperatures and, average water velocities.
Significant developments in the HEI heat transfer correction factors since issuance of the 7 th edition pertain to stainless steel and titanium. View Cart Checkout Continue Shopping.
From tononferrous alloys were generally the tube materials of choice for steam power plant surface condenser service. Sign in or create your free personal ASME account.
In a surface condenser vapor is brought into contact with a solid surface which is ror to a temperature below the saturation temperature of the vapor at its prevailing partial pressure. Heat exchange in single phase flows is usually impeded by the presence of insulating boundary layers. Water Cooled Steam Surface Condensers.
The Overall Heat Transfer CoefficientU based on the condensing surface areamay be expressed in terms of local coefficients, a, via the sum of thermal resistances:. Turbomachinery Blog features postings from experts in all areas of turbomachinery, such as: Check Out Now Continue Browsing. Sign into or create your free personal account Sign in via Shibboleth What is Shibboleth? Modern practice is to model the proposed nest on computer to calculate thermal performance and to ensure that any non-condensable gases present are extracted at the point of lowest pressure, e.
Since then, operational experience gained with stainless steel and titanium coupled with technological advances in these materials have resulted in revisions and incorporation of additional correction factors in subsequent editions of the HEI Standards for Steam Surface Condensers.
The thermal resistance, F, of fouling on the coolant side is therefore an important consideration. Unlike surfxce plant condensers, they may also be designed to subcool the condensate. Since its founding over 80 years ago, the Institute stea, earned international recognition as the leading authority on the technologies for heat exchange and vacuum apparatus. It replaces the multiple user names and passwords necessary to access subscription-based content with a single user name and password that can be entered once per session.
On condensation, however, the gor reduction in volume as the vapor turns to condensate results in an inflow of vapor towards the surface; the heat transfer is impeded only by a thin film of condensate on the surface. The Heat Exchange Institute HEI is a nonprofit trade association committed to the technical advancement, promotion, and understanding of a broad range of utility and industrial-scale heat exchange and vacuum apparatus.
Again a wide variety of arrangements are in use incorporating baffled shell-and-tube, gasketed plate and spiral plate constructions and plate-fin exchangers. There are consensers products.
Useful discussions of developments are given by Bell VT05A; 9 pages doi: It highlights the importance of using and validating the proper correction factors to predict and ensure optimum condenser performance and operation. Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal.
Early attempts to provide overall heat transfer coefficients for the design of steam condensers took no account of the detailed layout of the tubenest, e. Techniques to Reduce Exchanger or System Cost. Citing articles are presented as examples only.