Economics of Gas Turbine Inlet Air Cooling System for Power Enhancement

1996 ◽  
Author(s):  
Motoaki Utamura ◽  
Yoshio Nishimura ◽  
Akira Ishikawa ◽  
Nobuo Ando
Keyword(s):  
Power Generation ◽  
Thermal Energy ◽  
Cooling System ◽  
Electric Energy ◽  
Dew Point ◽  
Design Parameters ◽  
Air Cooling ◽  
Power Enhancement ◽  
Air Cooling System ◽  
Running Cost

A cost estimate method is presented, which enables to compare inlet air cooling system for power enhancement of combustion turbine with other power generation system. A new energy conversion index is developed which arranges system design parameters in a dimensionless form and also exhibits running cost. It is suggested that the inlet air cooling system is equivalent to simple cycle or pumped storage in view of the dimensionless running cost. Next, a cost diagram relating capital cost to power generation cost is presented also in non-dimensional form, which could provide a measure to examine investment worth for a power producer. Moreover, cooling effectiveness as function of cooled inlet air temperature is investigated using specific thermal energy. It is revealed that cooling beyond dew point requires a larger thermal energy per electric energy produced and thus less economical unless the price of electricity depends on electricity demand.

Assessments of High-Efficient Regenerative Evaporative Cooler Effects on Desiccant Air Cooling Systems

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Hakan Caliskan ◽  
Dae-Young Lee ◽  
Hiki Hong
Keyword(s):  
Cooling System ◽  
Dew Point ◽  
Air Cooling ◽  
Sensible Heat ◽  
Cooling Systems ◽  
High Efficient ◽  
Air Cooling System ◽  
Evaporative Cooler ◽  
Effectiveness And Efficiency ◽  
And Performance

Abstract In this paper, the effects of regenerative evaporative coolers on the dry desiccant air cooling system are assessed. Thermodynamic analysis is performed point by point on the unmodified (ɛ = 0.67) and modified (ɛ = 1) regenerative evaporative cooler supported systems. It is found that the effectiveness and efficiency of the system were significantly increased by modification. Effectiveness of the system increases from 0.95 to 2.16 for the wet bulb and from 0.63 to 1.43 for dew point effectivenesses, while the exergy efficiency increases from 18.40% to 41.93%. Exergy and energy performances of the system increase 1.28 times and 0.61 times, respectively. Finally, sustainability is increased by 40% with the modification of the regenerative evaporative cooler. Also, changing the regenerative evaporative cooler of the solid desiccant wheel with the effective one can increase the overall system efficiency and performance without changing the sensible heat and desiccant wheels.

Optimization of Indirect Air-Cooling System of Power Plants with Incremental Power Generation Method and Coal Consumption Method

2013 ◽  
Vol 341-342 ◽  
pp. 1250-1253
Author(s):  
Wen Zhou Yan ◽  
Bo Yang
Keyword(s):  
Power Generation ◽  
Annual Cost ◽  
Power Plants ◽  
Cooling System ◽  
Operating Cost ◽  
Air Cooling ◽  
Coal Consumption ◽  
Optimization Software ◽  
Practical Engineering ◽  
Air Cooling System

The indirect air-cooling system is usually optimized for minimum annual cost. Domestic designing departments take different views on incremental power generation method and coal consumption method in calculation of operating cost. This paper analyzed the two different methods by using the optimization software of indirect air-cooling system, and modified the main parameters of indirect air-cooling system in practical engineering. In this paper, annual cost is in 10 thousand Yuan.

scholarly journals Preliminary investigation of thermal behaviour of PCM based latent heat thermal energy storage

2018 ◽  
Vol 32 ◽  
pp. 01017
Author(s):  
Octavian G. Pop ◽  
Lucian Fechete Tutunaru ◽  
Florin Bode ◽  
Mugur C. Balan
Keyword(s):  
Energy Consumption ◽  
Energy Storage ◽  
Latent Heat ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Cooling System ◽  
Air Cooling ◽  
Air Velocity ◽  
Air Inlet ◽  
Air Cooling System

Solid-liquid phase change is used to accumulate and release cold in latent heat thermal energy storage (LHTES) in order to reduce energy consumption of air cooling system in buildings. The storing capacity of the LHTES depends greatly on the exterior air temperatures during the summer nights. One approach in intensifying heat transfer is by increasing the air’s velocity. A LHTES was designed to be integrated in the air cooling system of a building located in Bucharest, during the month of July. This study presents a numerical investigation concerning the impact of air inlet temperatures and air velocity on the formation of solid PCM, on the cold storing capacity and energy consumption of the LHTES. The peak amount of accumulated cold is reached at different air velocities depending on air inlet temperature. For inlet temperatures of 14°C and 15°C, an increase of air velocity above 50% will not lead to higher amounts of cold being stored. For Bucharest during the hottest night of the year, a 100 % increase in air velocity will result in 5.02% more cold being stored, at an increase in electrical energy consumption of 25.30%, when compared to the reference values.

The possibility of using a novel dew point air cooling system (M-Cycle) for A/C application in Arab Gulf Countries

2019 ◽  
Vol 148 ◽  
pp. 185-197 ◽  
Author(s):  
Saleh S. Baakeem ◽  
Jamel Orfi ◽  
Abdulmajeed Mohamad ◽  
Saleh Bawazeer
Keyword(s):  
Cooling System ◽  
Dew Point ◽  
Air Cooling ◽  
Gulf Countries ◽  
Air Cooling System ◽  
Arab Gulf

GT Inlet Air Boosting and Cooling Coupled With Cold Thermal Storage in Combined Cycle Power Plants

2008 ◽  
Author(s):  
Nicola Palestra ◽  
Giovanna Barigozzi ◽  
Antonio Perdichizzi
Keyword(s):  
Gas Turbine ◽  
Energy Production ◽  
Power Plants ◽  
Cooling System ◽  
Electric Energy ◽  
Thermal Storage ◽  
Combined Cycle ◽  
Inlet Pressure ◽  
Air Cooling ◽  
Air Cooling System

Investigation results of compressor inlet air boosting and cooling, applied to combined cycle power plants, are presented and discussed. Gas turbine performances may be reduced by site altitude and inlet losses due to air ducts and filters. Increasing inlet pressure by fans allows the restoring of gas turbine power output and efficiency at least to ISO reference conditions. Coupling such a system with inlet air cooling may completely suppress the temperature increase given by inlet air compression and the pressure losses through air coils as well; therefore, by this way, a further increase of electric energy production can be achieved. An in-house simulation code, developed for evaluating inlet air cooling system performance by cool thermal storage, has been adapted in order to also simulate off-design behaviour of boosting applied to combined cycle plants. A 127 MW reference power plant, operating in the Italian scenario, has been considered. Inlet pressure increase has been evaluated with and without inlet cooling, and in comparison with inlet cooling solution alone. Both thermodynamic and economical results have been analyzed. A parametric analysis on both system sizing parameters has been carried out. Best solution was found in coupling boosting to inlet cooling system through cool thermal storage; it produced an important increase in electric energy production. Location site influence on investment pay-back proved to be less important compared to the solution with inlet air cooling system alone.

scholarly journals Air circulation in a gastrointestinal light source box and endoscope in the era of SARS-CoV-2 and airborne transmission of microorganisms

2021 ◽  
Vol 09 (03) ◽  
pp. E482-E486
Author(s):  
Stanislas Chaussade ◽  
Einas Abou Ali ◽  
Rachel Hallit ◽  
Arthur Belle ◽  
Maximilien Barret ◽  
...  
Keyword(s):  
Light Source ◽  
Cooling System ◽  
Air Cooling ◽  
Airborne Transmission ◽  
Plastic Tube ◽  
Care Workers ◽  
Air Cooling System ◽  
Forced Air ◽  
Air Circulation ◽  
Closed Environment

Abstract Background and study aims The role that air circulation through a gastrointestinal endoscopy system plays in airborne transmission of microorganisms has never been investigated. The aim of this study was to explore the potential risk of transmission and potential improvements in the system. Methods We investigated and described air circulation into gastrointestinal endoscopes from Fujifilm, Olympus, and Pentax. Results The light source box contains a lamp, either Xenon or LED. The temperature of the light is high and is regulated by a forced-air cooling system to maintain a stable temperature in the middle of the box. The air used by the forced-air cooling system is sucked from the closed environment of the patient through an aeration port, located close to the light source and evacuated out of the box by one or two ventilators. No filter exists to avoid dispersion of particles outside the processor box. The light source box also contains an insufflation air pump. The air is sucked from the light source box through one or two holes in the air pump and pushed from the air pump into the air pipe of the endoscope through a plastic tube. Because the air pump does not have a dedicated HEPA filter, transmission of microorganisms cannot be excluded. Conclusions Changes are necessary to prevent airborne transmission. Exclusive use of an external CO2 pump and wrapping the endoscope platform with a plastic film will limit scatter of microorganisms. In the era of pandemic virus with airborne transmission, improvements in gastrointestinal ventilation systems are necessary to avoid contamination of patients and health care workers.

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