ASME Piping Code-Based Stress Analysis Procedure and a Comparison With the Italian Code

2012 ◽  
Author(s):  
Ottaviano Grisolia
Keyword(s):  
Heat Recovery ◽  
Analysis Procedure ◽  
Steam Generators ◽  
Stress Evaluation ◽  
Good Design ◽  
Flexibility Analysis ◽  
Preliminary Stress ◽  
High Temperature Components ◽  
The Stability ◽  
Tube Assembly

The procedure proposed applies to evaporator section of bottom-supported heat-recovery steam generators (HSRG): It includes classical methods for the static analysis of the lower header based on ASME Power Piping code B31.1 [1] and a computer-modeled flexibility analysis with a preliminary stress evaluation using both Italian and ASME pressure formulae. The stability of the harp high-temperature components may be critical because of their longitudinal dimensions, thermal expansions and loading. So, further elements of engineering choices may help obtaining good design of the header-tube assembly (harp).

Application of ASME Piping Code Through a Stress Analysis Procedure and Comparison With the Italian Code

2014 ◽  
Author(s):  
Ottaviano Grisolia ◽  
Lorenzo Scano
Keyword(s):  
Combined Cycle ◽  
Analysis Procedure ◽  
Stress Evaluation ◽  
Flexibility Analysis ◽  
Worked Example ◽  
Preliminary Stress ◽  
Static Instability ◽  
High Temperature Components ◽  
The Stability ◽  
Pressure Stress

A previously-developed procedure applies to evaporator section of bottom-supported heat-recovery steam generators (HRSG): The procedure features methods to use on pressure internal parts designed according to Section I, as required by the Boiler & Pressure Vessel (B & PV) Code. It uses ASME Power Piping Code B31.1, which is for external piping, to evaluate additional concerns on pressure parts that have already met Section I. This mainly because other sections of B & PV code do not cover flexibility analysis: Procedure includes classical methods for the static analysis of the lower header and a computer-modeled flexibility analysis. They investigate the stability of the harp high-temperature components, which may be critical because of their longitudinal dimensions, thermal expansions and loading: Preliminary stress evaluation showed that Italian pressure formula is largely conservative. Methods’ application to a worked example using both ASME and Italian pressure formulae shows now that the pressure contribution is the greatest. Also, the maximum stress found out on the header in sustained case appears consistent with that from numerical model, though bending contribution the greatest; Sustained case appears less critical than thermal. So, the design should be safe from risks of static instability due to longitudinal pressure stress: deformation occasionally observed in field on the lower headers may be correctly imputed to thermal expansion. Herein, a bottom-supported HRSG double-width unity of combined cycle power plant is considered as the worked example.

Flow Stability of Heat Recovery Steam Generators

2004 ◽  
Author(s):  
Heimo Walter ◽  
Wladimir Linzer
Keyword(s):  
Heat Recovery ◽  
Flow Instability ◽  
Reverse Flow ◽  
Natural Circulation ◽  
Density Wave ◽  
Horizontal Tube ◽  
Steam Generators ◽  
Tube Bank ◽  
First Results ◽  
The Stability

In this paper the results of a theoretical stability analysis are presented. The investigation was done for two different types of natural circulation Heat Recovery Steam Generators (HRSG) — a two-drum steam generator and a HRSG with a horizontal tube bank. The investigation shows the influence of the boiler geometry on the stability of the steam generators. For the two-drum boiler the static instability, namely the reverse flow is analysed. First results of the investigations for the HRSG with a horizontal tube bank are also presented. In this case the dynamic flow instability of density wave oscillations is analysed.

scholarly journals General Design Considerations for Gas Turbine Waste Heat Steam Generators

1968 ◽  
Author(s):  
W. V. Hambleton
Keyword(s):  
Gas Turbine ◽  
Heat Recovery ◽  
Waste Heat ◽  
Steam Generation ◽  
Steam Generators ◽  
Design Considerations ◽  
Exhaust Heat ◽  
Gas Turbine Exhaust ◽  
Exhaust Heat Recovery ◽  
Turbine Exhaust

This paper represents a study of the overall problems encountered in large gas turbine exhaust heat recovery systems. A number of specific installations are described, including systems recovering heat in other than the conventional form of steam generation.

scholarly journals Gas Turbine Heat Recovery Steam Generators for Combined Cycles Natural or Forced Circulation Considerations

1988 ◽  
Author(s):  
Akber Pasha
Keyword(s):  
Gas Turbine ◽  
Steam Generator ◽  
Heat Recovery ◽  
Power Plants ◽  
Natural Circulation ◽  
Combined Cycle ◽  
Heat Recovery Steam Generator ◽  
Steam Generators ◽  
Forced Circulation ◽  
Gas Turbine Exhaust

In recent years the combined cycle has become a very attractive power plant arrangement because of its high cycle efficiency, short order-to-on-line time and flexibility in the sizing when compared to conventional steam power plants. However, optimization of the cycle and selection of combined cycle equipment has become more complex because the three major components, Gas Turbine, Heat Recovery Steam Generator and Steam Turbine, are often designed and built by different manufacturers. Heat Recovery Steam Generators are classified into two major categories — 1) Natural Circulation and 2) Forced Circulation. Both circulation designs have certain advantages, disadvantages and limitations. This paper analyzes various factors including; availability, start-up, gas turbine exhaust conditions, reliability, space requirements, etc., which are affected by the type of circulation and which in turn affect the design, price and performance of the Heat Recovery Steam Generator. Modern trends around the world are discussed and conclusions are drawn as to the best type of circulation for a Heat Recovery Steam Generator for combined cycle application.

Heat Recovery Steam Generators of Binary Combined-Cycle Units

2021 ◽  
Vol 68 (6) ◽  
pp. 452-460
Author(s):  
P. A. Berezinets ◽  
G. E. Tereshina
Keyword(s):  
Heat Recovery ◽  
Combined Cycle ◽  
Steam Generators

The Upgrading of the Combined-Cycle Cogeneration Plant with Heat-Recovery Steam Generators for Large Cities of the Russian Federation

2021 ◽  
Vol 68 (2) ◽  
pp. 110-116
Author(s):  
M. A. Vertkin ◽  
S. P. Kolpakov ◽  
V. E. Mikhailov ◽  
Yu. G. Sukhorukov ◽  
L. A. Khomenok
Keyword(s):  
Russian Federation ◽  
Heat Recovery ◽  
Combined Cycle ◽  
Cogeneration Plant ◽  
Steam Generators ◽  
Large Cities ◽  
The Russian Federation
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