scholarly journals Flow-Accelerated Corrosion Analysis for Heat Recovery Steam Generator in District Heating System

2019 ◽  
Vol 29 (1) ◽  
pp. 11-15 ◽  
Author(s):  
Minki Hong ◽  
◽  
Hobyung Chae ◽  
Youngsu Kim ◽  
Min Ji Song ◽  
...  
Keyword(s):  
Steam Generator ◽  
Heat Recovery ◽  
District Heating ◽  
Heating System ◽  
Heat Recovery Steam Generator ◽  
District Heating System ◽  
Accelerated Corrosion ◽  
Flow Accelerated Corrosion

Considerations in the Capacity Uprating of an EOR HRSG

2016 ◽  
Author(s):  
John J. Aumuller ◽  
Carlos F. Lange ◽  
Michael J. Humphries
Keyword(s):  
Steam Generator ◽  
Oil Recovery ◽  
Heat Recovery ◽  
Mechanical Performance ◽  
Heat Recovery Steam Generator ◽  
Damage Mechanisms ◽  
Accelerated Corrosion ◽  
Water Steam ◽  
Available Energy ◽  
Flow Accelerated Corrosion

In enhanced oil recovery operations, the steaming capacity of a heat recovery steam generating unit is limited by the available energy provided from the gas turbine generator, however, there are a number of other component parameters that limit the thermal and mechanical performance of any specific heat recovery steam generator. These additional parameters reside on both the flue gas side and water / steam side of the heat recovery steam generator. Repetitive failures of steam generator components are evidence of damage mechanisms that are active during operation. Some of these damage mechanisms are explored to determine the immediate impact in up-rating the steam generators to higher capacity throughput and also, on longer term reliability. A resulting finding of this study examines the efficacy of using P22 low alloy piping in lieu of carbon steel piping to address flow accelerated corrosion.

Heat Recovery Enhancement and Operational Issues of a 200 kWe Fuel Cell Cogeneration Plant

1999 ◽  
Author(s):  
Erika Söderlund ◽  
Andrew R. Martin ◽  
Per Alvfors ◽  
Jonas Forsman ◽  
Laszlo Sarközi
Keyword(s):  
Fuel Cell ◽  
Heat Production ◽  
Heat Recovery ◽  
District Heating ◽  
Original System ◽  
Heating System ◽  
Cogeneration Plant ◽  
District Heating System ◽  
Air Preheater ◽  
Vapor Cloud

Abstract This study presents some of the experiences gained during a two year operational period of a decentralized fuel cell cogeneration plant installed in southern Sweden. Various modifications to the system are described, most notably a plume eliminator for the reduction of an undesirable vapor cloud emitted by the original system. Aside from vapor cloud elimination, the plume eliminator allows for more efficient plant operation, as a larger fraction of the system cooling requirements can be shifted to the district heating system. In-field measurements show a 17 to 26% increase in district heat production with use of the plume eliminator, depending upon the season of operation (winter or summer). The study also presents two options for added heat recovery, which are employed in conjunction with the plume eliminator: an air preheater module; and an air preheater/humidifier module. Calculations show that air preheating has a small but measurable impact on heat recovery (an additional 8% gain), while combined air preheating and humidification allows for nearly a 50% increase in district heat production.

scholarly journals Modelling and Simulation of Trigeneration Systems Integrated with Gas Engines

2015 ◽  
Vol 15 ◽  
pp. 18-25 ◽  
Author(s):  
M.C. Ekwonu ◽  
Simon Perry ◽  
E.A. Oyedoh
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
District Heating ◽  
Rankine Cycle ◽  
Heating System ◽  
Cycle Model ◽  
District Heating System ◽  
Gas Engine

In this paper, the integration of Gas Engines with the Rankine cycle and Organic Rankine cycle for use as a combined cooling, heating and power (CCHP) system was investigated. The gas engine model, Organic Rankine Cycle model, Rankine Cycle model and single effect absorption chiller model were developed in Aspen HYSYS V7.3®. The system performance of the combination of the Rankine Cycle and Organic Rankine Cycle was investigated with two different configurations. The series and parallel combination of Rankine and Organic Rankine Cycle integration with the gas engine showed an increase of 7% and 15% respectively both in the overall system efficiency and power generated. The trigeneration system provided a cooling duty of 18.6 kW, a heating duty of 704 kW to a district heating system with 3.9 MW of power generated and an overall trigeneration efficiency of 70%. The system also gave a 9% increase in the power generated when compared to the gas engine without waste heat recovery whilst bottoming with Rankine cycle, Organic Rankine cycle and Absorption refrigeration system.Keywords: Modelling, Trigeneration, Gas Engines, Waste Heat Recovery, Rankine Cycle, Organic Rankine Cycle.

scholarly journals Technology Pathways and Economic Analysis for Transforming High Temperature to Low Temperature District Heating Systems

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3218
Author(s):  
Pedro Durán ◽  
Herena Torio ◽  
Patrik Schönfeldt ◽  
Peter Klement ◽  
Benedikt Hanke ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Renewable Energy ◽  
High Temperature ◽  
Low Temperature ◽  
Economic Analysis ◽  
District Heating ◽  
Heating System ◽  
District Heating System ◽  
Heating Systems ◽  
District Heating Systems

There are 1454 district heating systems in Germany. Most of them are fossil based and with high temperature levels, which is neither efficient nor sustainable and needs to be changed for reaching the 2050 climate goals. In this paper, we present a case study for transforming a high to low temperature district heating system which is more suitable for renewable energy supply. With the Carnot Toolbox, a dynamic model of a potential district heating system is simulated and then transformed to a low temperature supply. A sensitivity analysis is carried out to see the system performance in case space constrains restrict the transformation. Finally, an economic comparison is performed. Results show that it is technically possible to perform the transformation until a very low temperature system. The use of decentralized renewable sources, decentralized heat storage tanks and the placement of a heat pump on each building are the key points to achieve the transformation. Regarding the sensitivity analysis, the transformation is worth doing until the seasonal storage and solar collector field sizes are reduced to 60% and 80% of their values in the reference case, respectively. The economic analysis shows, however, that it is hard for highly efficient low temperature renewable based heat networks to compete with district heating systems based on a centralized fossile CHP solution. Thus, though the presented transformation is technically possible, there is a strong need to change existing economic schemes and policies for fostering a stronger promotion of renewable energy policies in the heat sector.

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