Dry and Hybrid Condenser Cooling Design to Maximize Operating Income

2005 ◽  
Author(s):  
Richard B. Boulay ◽  
Miroslav J. Cerha ◽  
Mo Massoudi
Keyword(s):  
Power Plants ◽  
Cooling System ◽  
Heat Rate ◽  
Electrical Energy ◽  
Spot Market ◽  
Capital Cost ◽  
Plant Location ◽  
Energy Prices ◽  
Operating Income ◽  
The Impact

Reduced availability of the large quantities of water required for traditional wet condenser cooling systems has created a growing market for dry and hybrid cooling for power plants. These technologies significantly reduce overall water consumption, but with large capital cost and heat rate penalties. An important consideration in sizing air-cooled and hybrid condensing systems is the emergence of a spot market for electrical energy. Energy prices can vary over an order of magnitude, and are typically highest during summer conditions. This paper evaluates whether it may be more economical to over-size the cooling system to achieve lower backpressures during the summer and thus generate additional revenue when energy prices peak. A universal methodology for evaluating the impact of cooling system design on operating economics was developed. It consists of a capital cost database for the condensing system, a Gate/Cycle model used to evaluate the effect of cooling parameter selection thermal performance, climatological data to provide representative dry bulb and wet bulb temperatures for typical annualized operating profiles at each plant location, and historical spot market energy pricing for each plant location. Several different design points for the cooling system are examined to determine the optimum selection that maximizes the difference between revenue and cooling system capital cost recovery. A nominal 500 MW coal-burning power plant is used as the study basis to demonstrate the results of this methodology for both northeastern and southwestern sites in the USA.

Cash is King - Repurposing Marginal Assets to Reduce Floating LNG CAPEX

2021 ◽  
Author(s):  
Kenneth Shane Tierling
Keyword(s):  
Energy Demand ◽  
Investment Decision ◽  
Renewable Energy Sources ◽  
Cost Savings ◽  
Business Case ◽  
Capital Cost ◽  
Minimum Size ◽  
Energy Prices ◽  
Global Energy ◽  
The Impact

Objective / Scope With renewable energy sources not currently able to move energy around the globe and forming small portions of the total global energy supply, it has fallen upon hydrocarbon sources to form the backbone of global energy movements. Hence, the recent energy demand decline, along with policy, have disproportionately impacted world-wide petroleum and LNG pricing. The impact on Floating LNG has been a heightened demand for capital efficiency, required to achieve final investment decision. A business case specific means of reducing FLNG CAPEX, has been repurposing marginal assets. Starting with a breakdown of the cost components of an FLNG facility, this paper will provide examples of the inclusion of preexisting assets into FLNG projects to reduce capital cost. The paper will wrap up with other opportunities for cost savings, to stimulate thought. Methods, Procedures, Process Floating LNG (FLNG) technologies have been deployed to monetize mid-sized offshore gas reservoirs, avoiding constructing a sub-sea gas pipeline to a land-based LNG facility and export jetty. Containing the processing to an oceanic environment also reduces the impact on indigenous peoples as well as terrestrial flora and fauna. FLNG facilities also have the potential of serving multiple offshore fields over the life of the facility, thereby reducing the minimum size field that can be economically monetized. Interest in FLNG continues, despite the current slump in energy prices, however these challenging times are refocusing efforts on reducing the capital cost of FLNG. This paper will explore recent capital cost trends in LNG, with a focus on floating LNG, examples of realized opportunities to reduce CAPEX, and further scope for reductions. Results, Observations, Conclusions The readers will take-away from this paper a deeper understanding of: Recent trends in CAPEX for LNG, and specifically FLNG Where significant opportunities lie for cost reduction Examples of the reuse and repurposing of marginal assets to reduce cost of FLNG facilities Areas to be explored for future capital reduction Novel / Additive Information This paper pulls together disparate threads into a coherent whole, providing visualization of the trends and examples of realized opportunities.

The Effect of Alternative Turbine Cooling Schemes on the Performance of Utility Gas Turbine Powerplants

1982 ◽  
Author(s):  
Arthur Cohn ◽  
Mark Waters
Keyword(s):  
High Temperature ◽  
Gas Turbines ◽  
Power Plants ◽  
Heat Rate ◽  
Combined Cycle ◽  
Specific Power ◽  
Cooling Effectiveness ◽  
Turbine Cooling ◽  
The Impact ◽  
Systems Studies

It is important that the requirements and cycle penalties related to the cooling of high temperature turbines be thoroughly understood and accurately factored into cycle analyses and power plant systems studies. Various methods used for the cooling of high temperature gas turbines are considered and cooling effectiveness curves established for each. These methods include convection, film and transpiration cooling using compressor bleed and/or discharge air. In addition, the effects of chilling the compressor discharge cooling gas are considered. Performance is developed to demonstrate the impact of the turbine cooling schemes on the heat rate and specific power of Combined–Cycle power plants.

Carbon Dioxide Capture Using Sorbent-Loaded Hollow-Fiber Modules for Coal-Fired Power Plants

2021 ◽  
pp. 1-28
Author(s):  
Bachir El Fil ◽  
Dhruv C. Hoysall ◽  
Srinivas Garimella
Keyword(s):  
Carbon Dioxide ◽  
Power Plant ◽  
Hollow Fiber ◽  
Carbon Capture ◽  
Power Plants ◽  
Carbon Dioxide Capture ◽  
Electrical Energy ◽  
Parasitic Load ◽  
Temperature Swing Adsorption ◽  
The Impact

Abstract The impact of post-combustion carbon dioxide capture on the performance of a power plant is evaluated. A model of a coal power plant with post-combustion temperature swing adsorption CO2 capture using sorbent-loaded hollow fibers is presented. The resulting performance and cost of carbon capture are compared with those of other adsorption-based technologies. A parametric analysis of the performance of the power plant with respect to key parameters in the hollow fiber module operation is presented. It is found that electrical energy consumption for the compression of CO2 is a major parasitic load common to all absorption technologies and accounts for almost half of the total parasitic load. The effect of source temperature, flue gas fan and coupling fluid pump flow rates on overall system performance is presented. The impacts of different carbon capture technologies on the same coal-fired power plant are compared. Hollow fiber modules had the lowest parasitic load on the power plant, followed by KS-2 based carbon capture.

Reducing the Risk of Natural Ventilation With Flexible Design

Solar Energy ◽  
2006 ◽  
Author(s):  
Lara V. Greden ◽  
Leon R. Glicksman ◽  
Gabriel Lo´pez-Betanzos
Keyword(s):  
Natural Ventilation ◽  
Energy Savings ◽  
Cooling System ◽  
Building Energy ◽  
Design Parameters ◽  
Energy Prices ◽  
Flexible Design ◽  
Local Climate ◽  
Capital Costs ◽  
The Impact

Performance uncertainty is a barrier to implementation of innovative technologies. This research investigates the potential of flexible design — one that enables future change — to improve the economic performance of a naturally ventilated building. The flexible design of the naturally ventilated building enables future installation of a mechanical cooling system by including features such as space for pipes and chillers. The benefits of the flexible design are energy savings, delay of capital costs and capability of mitigating the risk of a failed building (by installing the mechanical cooling system). To evaluate the flexible design, building energy simulation is conducted over a multi-year time period with stochastic outdoor temperature variables. One result is a probability distribution of the time when the maximum allowable indoor temperature under natural ventilation is exceeded, which may be “never.” Probability distributions are also obtained for energy savings and cost savings as compared to a mechanically cooled building. Together, these results allow decision-makers to evaluate the long-term performance risks and opportunities afforded by a flexible implementation strategy for natural ventilation. It is shown that the likelihood of future installation of mechanical cooling is most sensitive to design parameters. The impact of increased climate variability depends on the local climate. The probability of installing the mechanical system also depends on the comfort criteria. The results show that capital costs for cooling equipment are much greater than the present value of 10 years of cooling energy costs. This result motivates consideration of flexible design as opposed to hybrid cooling designs (which have immediate installation of mechanical cooling). Future work will study the impact of uncertain energy prices on investment attractiveness of naturally ventilated buildings. Other applications of the framework presented herein include replacing the building energy model with a model of another climate-dependent system, such as solar photovoltaic arrays.

scholarly journals Heat Transfer in the Ducts of the Cooling Systems of Traction Motors

2018 ◽  
Vol 7 (4.3) ◽  
pp. 315
Author(s):  
A А. Aleksahin ◽  
A V Panchu ◽  
L A. Parkhomenko ◽  
H V. Bilovol
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Nuclear Power ◽  
Power Plants ◽  
Cooling System ◽  
Transfer Processes ◽  
New Energy ◽  
Working Media ◽  
Artificial Heat ◽  
The Impact

Requirements for increasing thermal efficiency heat exchangers, which lead to energy saving, material and reduction cost, and as a result of reducing the impact on the environment, led to the development and use of various methods of increasing heat transfer. These methods are called intensification of heat transfer processes. Intensification of heat and mass transfer processes is of great importance for making progress in improving the existing and creation of new energy and heat-exchange equipment. Among the ways of intensifying heat transfer, the swirling of flows of working media is one of the simplest and most common methods and is widely used in energy-intensive channels of nuclear power plants, heat exchangers, aeronautical and rocket and space equipment, chemical industry and other technical devices. We have proposed formulas to determine the cooling air velocity necessary to ensure the required temperature condition of the traction motor assemblies. Decrease in the power of fans in the cooling system using the artificial heat transfer intensification in the ducts was estimated based on the generalization of the results of calculations.  

scholarly journals Economic viability and profitability assessments of WECS

2020 ◽  
Vol 10 (2) ◽  
pp. 1220
Author(s):  
Mohammed Kdair Abd
Keyword(s):  
Wind Energy ◽  
Alternative Energy ◽  
Power Plants ◽  
Electrical Energy ◽  
Green Energy ◽  
Energy Prices ◽  
Wind Energy Conversion ◽  
Alternative Energy Sources ◽  
Technological Advances ◽  
Alternative Sources

Technical and technological advances in alternative energy sources have led many countries to add green energy to their power plants to reduce carbon emissions and air pollution. At present, many electricity companies are looking to use alternative sources of energy because of high electrical energy prices. Wind energy is more useful than many renewable energies such as solar, heat, biomass, etc. The Wind Energy Conversion System (WECS) is a system that converts the kinetic energy of the wind into electrical energy to feed the known loads. WECS can be found in a variety of technology. Climate change and load demand are essential determinants of WECS optimization modelling. In this paper, proposed a strategy focused primarily on economic analysis WECS. The strategy based on a weather change to find the optimal designing and modelling for four different types of WECS using HOMER software. Finally, several criteria were used to determine which type of WECS was the most profitable investment and less payback period.

Global Pandemics on European Electrical Energy Markets

2021 ◽  
Vol 10 (3) ◽  
pp. 24-46
Author(s):  
Mariusz Piotr Drabecki ◽  
Klaudia Brygida Kułak
Keyword(s):  
Electrical Energy ◽  
Energy Markets ◽  
High Impact ◽  
Market Condition ◽  
Power Demand ◽  
Energy Prices ◽  
Share Prices ◽  
Empirical Survey ◽  
The United Kingdom ◽  
The Impact

Global pandemics cause crises influencing all branches of economies. Basing on the currently striking COVID-19 pandemic, the authors analyze in this paper to what extent they may impact selected European electrical energy markets. For this, this research performs an empirical survey of the evolution of three market condition indicators: power demand, day-ahead energy prices, and prices of shares of power companies active in the generation sector. These are analyzed on examples of four European countries that all reacted differently to the spreading epidemic at governmental level: Italy, the United Kingdom, Poland, and Sweden. The evolution of indicators is analyzed for the period of COVID-19 outbreak in Europe, from January 27th 2020 until May 27th 2020 and checked with their behaviors in previous periods of time statistically. The study showed that global pandemics may have high impact on power demand and on share prices of power companies. Yet, the impact on day ahead energy prices is less evident and seems not present.

scholarly journals Application of System Dynamic Modelling for Evaluation of CO2 Emissions and Expenditure for Captive Power Generation Scenarios in the Cement Industry

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3115
Author(s):  
Akhil Kunche ◽  
Bożena Mielczarek
Keyword(s):  
Power Generation ◽  
Co2 Emissions ◽  
United Arab Emirates ◽  
Power Plants ◽  
Carbon Tax ◽  
Dynamic Modelling ◽  
Electrical Energy ◽  
Cement Industry ◽  
System Dynamic ◽  
The Impact

Cement manufacturing is an emission-intensive process. The cement industry is responsible for 8% of the global CO2 emissions, and produces a ton of cement uses up to 102 kWh of electrical energy, leading to a significant amount of indirect emissions depending on the emission intensity of the electricity source. Captive power generation can be potentially utilised as a mitigation approach to reduce emissions and as well as expenditure on electricity tariffs. In this study, a system dynamic simulation model is built to evaluate the impact of captive power generation on a cement plant’s net emissions and expenditure through electricity use, under different scenarios for carbon-tax, grid emission factor, and electricity tariffs. The model is then utilised to simulate a reference plant under realistic scenarios designed based on the conditions in Germany and United Arab Emirates. Furthermore, the model is utilised to calculate the payback period of investments on captive power plants under different carbon tax scenarios. The study concludes that a carbon tax policy on emissions through electricity utilisation could have an impact on incentivising the use of captive power generation and would lead to fewer emissions and expenditure during the cement plant’s lifetime.

scholarly journals Substation Related Forecasts of Electrical Energy Storage Systems: Transmission System Operator Requirements

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6207
Author(s):  
Tamara Schröter ◽  
André Richter ◽  
Jens Götze ◽  
André Naumann ◽  
Jenny Gronau ◽  
...  
Keyword(s):  
Power Plants ◽  
Storage Systems ◽  
Electrical Energy ◽  
Distribution Networks ◽  
Transmission System ◽  
Specific Storage ◽  
Network Load ◽  
System Operator ◽  
Micro Power ◽  
The Impact

The growth in volatile renewable energy (RE) generation is accompanied by an increasing network load and an increasing demand for storage units. Household storage systems and micro power plants, in particular, represent an uncertainty factor for distribution networks, as well as transmission networks. Due to missing data exchanges, transmission system operators cannot take into account the impact of household storage systems in their network load and generation forecasts. Thus, neglecting the increasing number of household storage systems leads to increasing forecast inaccuracies. To consider the impact of the storage systems on forecasting, this paper presents a new approach to calculate a substation-specific storage forecast, which includes both substation-specific RE generation and load forecasts. For the storage forecast, storage systems and micro power plants are assigned to substations. Based on their aggregated behavior, the impact on the forecasted RE generation and load is determined. The load and generation are forecasted by combining several optimization approaches to minimize the forecasting errors. The concept is validated using data from the German transmission system operator, 50 Hertz Transmission GmbH. This investigation demonstrates the significance of using a battery storage forecast with an integrated load and generation forecast.

scholarly journals RANCANG BANGUN TURBIN REAKSI PADA SUNGAI TAMAN KOTA 2 DENGAN MODEL ALIRAN VORTEX

2021 ◽  
Vol 5 (2) ◽  
pp. 79
Author(s):  
Chairil Insani
Keyword(s):  
Cross Section ◽  
Power Plants ◽  
River Flow ◽  
Draft Tube ◽  
Electrical Energy ◽  
Bearing Life ◽  
Water Turbine ◽  
Strip Plate ◽  
Type V ◽  
The Impact

Electricity is a necessity that must exist today, its use is always subject to binding. Most of the electricity comes from fossil energy-based power plants such as PLTU. Therefore, a solution was made by making a vortex water turbine to produce electrical energy. Utilizing a river flow with a small head of water, the water will enter the cross section. The flow will form a vortex because the shape of the section and the draft tube makes the lower side of the section have lower pressure. The vortex turbine will be designed to use a permanent magnet 150 watt AC generator. With a cross section of 60 x 55 x 150cm, draft tube 9.6 mm and turbine blade 30 x 50cm made of aluminum. On the framework will be used a 3 x 3.5 cm strip plate which is rolled. In order to withstand the impact of water on the blade, a 7 mm shaft is used and a nominal bearing life of 10274 hours. The resulting rotation is continued with a pulley with a diameter of 30 mm, 180 mm and with a belt type V material JIS K 6323 A 34.

Sign in / Sign up

Export Citation Format

Share Document