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.

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Condenser HEI Calculations

The latest edition 11 th edition was issued in October Poorly designed nests may suffer excessive frictional pressure losses and contain regions where the tubes are blanketed by noncondensable gases. For such models detailed correlations for local heat transfer and frictional pressure loss are required; developments in this complex field are reviewed by Davidson On condensation, however, the large 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.

Condensers and Cooling Towers.

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. View Cart Checkout Continue Shopping. In some applications spirally grooved tubing has been used to stem drainage of the condensate film and to increase internal heat transfer by turbulating the coolant flow.


Sign into or create your free personal account. 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. Surprisingly, there appears to be no optimum arrangement of tubes, the wide variety of nest configurations in service being shown by Lang Unlike power plant condensers, they may also be designed to subcool the condensate.


By continuing to use our website, you are agreeing to our privacy policy. The thermal resistance, F, of fouling on the coolant side is therefore an important consideration. 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.

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See also Condensation and Condensers. However, the Nusselt formulation is less successful in predicting tube nest mean heat transfer coefficient. VT05A; 9 pages doi: By the time the 7 th edition of the HEI Standards was issued inconcerns with corrosion and other issues with nonferrous tubing surgace had led to increased specification of stainless steel while titanium was still in its infancy.

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Some tools below are only available to our subscribers or users with an online account. 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 applications, condenser hotwells, atmosphere relief devices, vacuum breaker valves, condenser tube cleaning, steam inlet expansion joints, waterbox coating, lay-up procedure, and frequently asked questions.


Condensing heat transfer rates are typically two orders of magnitude higher than the rates for a gas on the shell side, so condensers do not generally require extended surface tubing.

Condenser HEI Calculations

Customize your page view by dragging and repositioning the boxes below. Surface condensers for process industries are usually smaller than power plant condensers and may contain a region for desuper-heating the incoming vapor.

In a surface condenser vapor is brought into contact with a solid surface which is cooled to a temperature below the saturation temperature of the vapor at its prevailing partial pressure. If nonwetting can be maintained e. 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.

Significant developments in the HEI heat transfer correction factors since issuance of the 7 th edition pertain to stainless steel and titanium. Basics of Hydraulic Loops.

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