scholarly journals Comparison between Concentrated Solar Power and Gas-Based Generation in Terms of Economic and Flexibility-Related Aspects in Chile

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1063
Author(s):  
Catalina Hernández Moris ◽  
Maria Teresa Cerda Guevara ◽  
Alois Salmon ◽  
Alvaro Lorca
Keyword(s):  
Natural Gas ◽  
Solar Power ◽  
Renewable Energy Sources ◽  
Cost Effective ◽  
Hybrid Plant ◽  
Point Of View ◽  
Concentrated Solar Power ◽  
Economic Point ◽  
Hybrid Plants ◽  
Cost Of Energy

The energy sector in Chile demands a significant increase in renewable energy sources in the near future, and concentrated solar power (CSP) technologies are becoming increasingly competitive as compared to natural gas plants. Motivated by this, this paper presents a comparison between solar technologies such as hybrid plants and natural gas-based thermal technologies, as both technologies share several characteristics that are comparable and beneficial for the power grid. This comparison is made from an economic point of view using the Levelized Cost of Energy (LCOE) metric and in terms of the systemic benefits related to flexibility, which is very much required due to the current decarbonization scenario of Chile’s energy matrix. The results show that the LCOE of the four hybrid plant models studied is lower than the LCOE of the gas plant. A solar hybrid plant configuration composed of a photovoltaic and solar tower plant (STP) with 13 h of storage and without generation restrictions has an LCOE 53 USD/MWh, while the natural gas technology evaluated with an 85% plant factor and a variable fuel cost of 2.0 USD/MMBtu has an LCOE of 86 USD/MWh. Thus, solar hybrid plants under a particular set of conditions are shown to be more cost-effective than their closest competitor for the Chilean grid while still providing significant dispatchability and flexibility.

scholarly journals Performance and Economic Analysis of Concentrated Solar Power Generation for Pakistan

Processes ◽  
2019 ◽  
Vol 7 (9) ◽  
pp. 575 ◽  
Author(s):  
Soomro ◽  
Mengal ◽  
Memon ◽  
Khan ◽  
Shafiq ◽  
...  
Keyword(s):  
Energy Production ◽  
Solar Power ◽  
Renewable Energy Sources ◽  
Supply And Demand ◽  
Air Cooling ◽  
Concentrated Solar Power ◽  
Cost Of Energy ◽  
Solar Power Tower ◽  
Economic Analyses ◽  
Solar Resource

In Pakistan, the utilization of renewable energy sources is increasing in order to reduce the electricity supply and demand gap. However, concentrated solar power (CSP) generation has not been considered in the country even though it has gained considerable attention worldwide. This study, as such, investigates the potential, performance, and economic analyses of four CSP technologies for different locations in Pakistan. Initially, an assessment of CSP sites, including solar resource, land, and water availability, was undertaken. Then, performance simulations of CSP technologies for four different locations of Pakistan, namely Quetta, Hyderabad, Multan, and Peshawar, were examined. For all cases, highest energy production was achieved in summers and lowest in winters, and CSP plants with evaporative cooling were found to be efficient compared to air cooling. The results also revealed that the Quetta and Hyderabad regions were promising for CSP development while parabolic tough (PT) and solar power tower (SPT) were the suitable CSP technologies for these regions. Specifically, the SPT plant with air cooling could be a favorable option for energy production in Quetta. Lastly, economic analyses revealed the financial feasibility of CSP plants in Pakistan since the levelized cost of energy is found to be significantly low.

The Role of Economic Evaluation in Dissemination and Implementation Research

2017 ◽  
Author(s):  
Ramesh Raghavan
Keyword(s):  
Service Providers ◽  
Implementation Strategies ◽  
Cost Effective ◽  
Point Of View ◽  
Dissemination And Implementation ◽  
Economic Point ◽  
Open Questions ◽  
Public Health Organizations ◽  
Quality Health ◽  
Dissemination And Implementation Research

This chapter presents an overview of how D&I research can be evaluated from an economic point of view. Dissemination and implementation imposes costs upon knowledge purveyors, provider organizations, public health organizations, and payers (including governments). However, whether these added costs will result in improved service delivery and, perhaps more importantly, client outcomes and improvements in population health remain as open questions. If emerging studies reveal that defined implementation strategies are more cost effective than “usual” implementation, then policymakers and service providers will need to resource these added costs of implementation in order to assure the success and sustainability of high-quality health services over the long term.

scholarly journals Modeling of natural convection of a concentrated solar power receiver absorber tube in interaction with neighbouring absorbers

2021 ◽  
pp. 53-61
Author(s):  
Olanrewaju Miracle Oyewola ◽  
Niyi Ezekiel Olukayode ◽  
Olusegun Olufemi Ajide
Keyword(s):  
Nusselt Number ◽  
Natural Convection ◽  
Average Nusselt Number ◽  
Solar Power ◽  
Renewable Energy Sources ◽  
Navier Stokes ◽  
Element Formulation ◽  
Concentrated Solar Power ◽  
Set Up ◽  
Energy Equations

Concentrated Solar Power (CSP) technology stands out among other renewable energy sources not only because of its ability to address current energy security and environmental challenges but because its energy can be stored for future use. To ensure optimum performance in this system, the heat losses need to be evaluated for better design. This work studies the natural convection in the receiver absorber tube of a CSP plant taking into consideration the influence of neighboring absorbers. A 2-Dimensional model was adopted in this study. Initially, a single absorber tube was considered, it was subjected to heat flux at the top wall, the bottom wall was insulated and a temperature differential was set up at the lateral walls. The dimensionless forms of Navier-Stokes and energy equations were solved using the finite element formulation of COMSOL Multiphysics software. The result obtained for a single absorber tube showed good agreement with existing research works. This validated model was then extended to multiple absorber tubes (two to six absorber tubes). On the basis of the study, there is an observed increase in the intensity and dominance of convective heat transfer with an increase in the number of absorber tubes. This is occasioned by an increase in the average surface temperature as well as average Nusselt number. For the Rayleigh number of 104, 105 and 106, the average Nusselt number increases with the number of absorber tubes by 13.87 %, 6.26 %, and 1.55 %, respectively. This increment suggests effect of thermal interactions among the neighboring absorber tubes

Natural-Gas-Derived Hydrogen in the Presence of Carbon Fuel Taxes and Concentrated Solar Power

2018 ◽  
Vol 6 (3) ◽  
pp. 3029-3038 ◽  
Author(s):  
Abdulrahman M. Al-Bassam ◽  
Jeremy A. Conner ◽  
Vasilios I. Manousiouthakis
Keyword(s):  
Natural Gas ◽  
Solar Power ◽  
Concentrated Solar Power ◽  
Fuel Taxes

Methodological Approach to Assessing the Economic Efficiency of Digital Projects Applying Internet of Things Platforms

2021 ◽  
Vol 152 (6) ◽  
pp. 134-142
Author(s):  
Aleksandr Yu. Mishin ◽  
Keyword(s):  
Internet Of Things ◽  
Economic Efficiency ◽  
Methodological Approach ◽  
Objective Assessment ◽  
Cost Effective ◽  
Scientific Work ◽  
Point Of View ◽  
Scientific Publications ◽  
Economic Point ◽  
Iot Platforms

One of the key ones and most cost-effective technology from an economic point of view for the real sector is the Internet of Things (IoT) technology, which is usually provided in the form of Internet of Things (IoT) platforms, still does not have its own framework for assessing its economic efficiency. The author proposes a methodological approach based on a combination of classical methods of investment analysis and an architectural approach. From the information point of view the scientific work is based on cost-effectiveness studies of IoT projects, domestic and foreign scientific publications, IT cases and research on taxonomy of IoT platforms. The proposed approach may serve as the basis both for preparation of financial business cases and for facilitating the development of tools for objective assessment of the project initiatives attractiveness as part of implementation of the state digital development programs in Russia.

THE POTENTIAL ECONOMIC ANALYSIS OF SOLAR HOME SYSTEM WITH SWITCHING METHOD ON HOUSEHOLD ELECTRICITY SCALE

2020 ◽  
Vol 9 (2) ◽  
pp. 125-134
Author(s):  
Kurnia Paranita Kartika ◽  
Riska Dhenabayu
Keyword(s):  
Electrical Power ◽  
Electricity Consumption ◽  
Electrical Energy ◽  
Point Of View ◽  
Solar Panels ◽  
Economic Point ◽  
Household Appliances ◽  
Cost Of Energy ◽  
Solar Home System ◽  
Switching Method

This study aims to design a Solar Home System with an Arduino-based Smart Switching system so that the use of electrical energy generated by solar panels can be adjusted without adding power from other electricity sources, such as PLN. Calculation of Leveled Cost of Energy (LCOE) is used as the basis for the switching process that will be carried out to regulate the use of household appliances that are routinely used, regulate electricity consumption automatically, minimize usage, and calculate the effectiveness of electric power usage. The way SHS works is to collect electrical energy from sunlight, then convert DC voltage to AC so that it can be used to run household electronic equipment. To accommodate the adequacy of electrical power, an automatic adjustment is made for household appliances that are routinely used, namely house lights, which includes setting the lights on and off and the number of lights that can be activated. The advantage of this research is that the SHS system is integrated with the automatic setting of the lights installed in the house so that the number of lights on will adjust the availability of electrical energy in the battery. In addition, with the LCOE method, the level of usage can be calculated so that users can save electricity. From the results of usage testing, it is found that the application of this switching technology provides benefits for users because it is no longer dependent on PLN supply. From an economic point of view, based on the calculation of Leveled Cost of Energy (LCOE), there is a kWh value savings of Rp. 77, - for each kWh price or about 4.53% compared to purchasing electricity with prepaid mode.

Cooperation Strategies Towards Sustainability in Insular Territories

2020 ◽  
pp. 216-238 ◽  
Author(s):  
Sérgio António Neves Lousada ◽  
Rui Alexandre Castanho
Keyword(s):  
Spatial Planning ◽  
Renewable Energy Sources ◽  
Point Of View ◽  
Energy Sources ◽  
Future Prospects ◽  
Economic Point ◽  
El Hierro ◽  
Sustainability Strategies ◽  
Economic Constraints ◽  
Sustainable Energy Policy

Nowadays, the high environmental sensitivity and economic constraints, as well as future prospects for development, require a strong sustainable energy policy. Such policies should be based on the local resource valorization – which gains more emphasis in ultra-peripheral territories as the case of the Madeira and Canary Archipelagos. In fact, renewable energy sources become more competitive from the economic point of view – however, with high environmental and social benefits in both Archipelagos. Thus, the local policies of Porto Santo Island will be inspired on the neighbor archipelago (Canary Islands), more specifically in the El Hierro Island – which is one of the worldwide leaders in sustainability issues. Contextually, the work enables a view through the cooperation perspective, highlighting sustainability strategies in Porto Santo Island (Madeira, Portugal) and El Hierro Island (Canary, Spain). Therefore, it will address diverse forms of energy production through natural resources with influence on spatial planning.

Waste to energy efficiency improvements: Integration with solar thermal energy

2019 ◽  
Vol 37 (4) ◽  
pp. 419-434
Author(s):  
B Mendecka ◽  
L Lombardi ◽  
Pawel Gladysz
Keyword(s):  
Energy Efficiency ◽  
Power Plant ◽  
Solar Power ◽  
Thermal Power ◽  
Environmental Benefits ◽  
Waste To Energy ◽  
Base Case ◽  
Concentrated Solar Power ◽  
Economic Point ◽  
Energy Plant

Hybridisation of waste to energy with solar facility can take competing energy technologies and make them complementary. However, realising the benefits of solar integration requires careful consideration of the technical feasibility as well as the economic and environmental benefits of a proposed system. In this work, a solar-integrated waste-to-energy plant scheme is proposed and analysed from an energy, environmental and economic point of view. The new system integrates a traditional waste-to-energy plant with a concentrated solar power plant, by superheating the steam produced by the waste-to-energy flue gas boiler in the solar facility. The original waste-to-energy plant – that is, the base case before introducing the integration with concentrated solar power – has a thermal power input of 50 MW and operates with superheated steam at 40 bar and 400 °C; net power output is 10.7 MW, and the net energy efficiency is equal to 21.65%. By combining waste-to-energy plant with the solar facility, the power plant could provide higher net efficiency (from 1.4 to 3.7 p.p. higher), lower specific CO2 emissions (from 69 to 180 kg MWh-1 lower) and lower levellised cost of electricity (from 13.4 to 42.3 EUR MWh-1 lower) comparing with the standalone waste to energy case. The study shows that: (i) in the integrated case and for the increasing steam parameters energy, economic and ecological performances are improved; (ii) increasing the solar contribution could be an efficient way to improve the process and system performances. In general, we can conclude that concentrated solar-power technology holds significant promise for extending and developing the waste to energy systems.

scholarly journals Natural Gas Hydrate Prediction and Prevention Methods of City Gate Stations

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Lili Zuo ◽  
Sirui Zhao ◽  
Yaxin Ma ◽  
Fangmei Jiang ◽  
Yue Zu
Keyword(s):  
Natural Gas ◽  
Ethylene Glycol ◽  
Gas Phase ◽  
Hydrate Formation ◽  
Inhibitory Effect ◽  
Point Of View ◽  
Economic Point ◽  
Prediction And Prevention ◽  
Prevention Methods ◽  
And Control

During the process of distributing natural gas to urban users through city gate stations, hydrate is easy to form due to the existence of throttling effect which causes safety risks. To handle this problem, a program to quickly calculate hydrate prediction and prevention methods for city gate stations is developed. The hydrate formation temperature is calculated through the Chen–Guo model, and the Peng–Robinson equation of state combined with the balance criterion is used to analyze the water condensation in the throttling process. The Wilson activity coefficient model is used to calculate the mass fraction in the liquid phase of thermodynamic inhibitors for preventing hydrates. Considering the volatility of inhibitors, the principle of isothermal flash has been utilized to calculate the total injection volume of the inhibitor. Moreover, the effects of commonly used methanol and ethylene glycol inhibitors are discussed. In terms of safety and sustainability, the ethanol inhibitor, which is considered for the first time, exhibited better prevention and control effects under conditions with relatively high temperature and low pressure after throttling. Combined with the actual working conditions of a gate station, methanol has the best inhibitory effect, followed by ethylene glycol. From an economic point of view, the benefits of the gas phase of the inhibitor during the delivery of natural gas are obvious; therefore, the method of methanol injection is recommended for hydrate prevention. If the gas phase benefits of the inhibitor are not considered, the ethylene glycol injection method becomes more economical.

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