The Influence of Weather Conditions and Operating Parameters on the Efficiency of Solar Power Collectors Based on Empirical Evidence

Shamsl is hybrid solar/natural-gas concentrated solar power (CSP) plants. The plant is also integrated with a booster gas-fired-heaters for steam superheating. In addition to direct fire-heaters to the heat transfer fluid (HTF) for supplying thermal energy during the night or whenever the solar irradiance level is dimmed. However, there is a more sustainable way to avoid power-generation-outages caused by transient weather conditions without a significant plant reconstruction, i.e. integration with gas turbines. In this study, a thermodynamic model of Shamsl integration with gas turbines is developed to investigate the gas turbine capacity and the exergitic efficiency of the supplied gas with and without the gas turbine involvement. The HTF heaters will receive the needed thermal energy from the gas turbines exhaust gases instead of the direct fire-heater (case1). Another potential is replacing the booster fire heaters with the gas turbine system as well. (case2). A parametric study is conducted to determine the size and the requirements of a gas turbine system for the specified power target demand in addition to a feasibility study for the proposed system. The results showed that using two gas turbines for the HTF heater significantly improved the overall efficiency and reduces the CO2 emission. Replacing the booster heater with two gas turbines improves the efficiency up to excess air factor of 2.5.

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CHARACTERISTICS OF MOLTEN SALTS AND RECOMMENDATIONS FOR USE IN SOLAR POWER STATIONS

Proceedings of International Structural Engineering and Construction ◽

10.14455/isec.res.2016.36 ◽

2016 ◽

Vol 3 (1) ◽

Author(s):

Samaan G. Ladkany ◽

William G. Culbreth ◽

Nathan Loyd

Keyword(s):

Molten Salt ◽

Molten Salts ◽

Solar Power ◽

Weather Conditions ◽

Thermal Capacity ◽

Naval Research ◽

Power Stations ◽

Office Of Naval Research ◽

The Us ◽

Efficient Type

Molten salts (MS) in the 580°C range could be used to store excess energy from solar power stations and possibly from nuclear or coal. The energy can be stored up to a week in large containers at elevated temperature to generate eight hours of electricity to be used at night or during peak demand hours. This helps to reduce the fluctuation experienced at thermal solar power stations due to weather conditions. Our research supported by Office of Naval Research (ONR), presents a survey of salts to be used in molten salt technology. The physical characteristics of these salts such as density, melting temperature, viscosity, electric conductivity, surface tension, thermal capacity and cost are discussed. Cost is extremely important given the large volumes of salt required for energy storage at a commercial power station. Formulas are presented showing the amount of salt needed per required megawatts of stored energy depending on the type of salt. The estimated cost and the size of tanks required and the operating temperatures are presented. Recommendations are made regarding the most efficient type of molten salt to use. Commercial thermal solar power stations have been constructed in the US and overseas mainly in Spain for which molten salt is being considered. A field of flat mirrors together with collection towers are used in some designs and parabolic troughs used in others.

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Renewable Energy Sources Used to Supply Pre-School Facilities with Energy in Different Weather Conditions

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.624.604 ◽

2014 ◽

Vol 624 ◽

pp. 604-612 ◽

Cited By ~ 37

Author(s):

Rifat Alihodzic ◽

Vera Murgul ◽

Nikolay Vatin ◽

Ekaterina Aronova ◽

Vojislav Nikolić ◽

...

Keyword(s):

Renewable Energy ◽

Power Supply ◽

Solar Power ◽

Renewable Energy Sources ◽

Weather Conditions ◽

School Facilities ◽

Energy Sources ◽

Space Planning ◽

Saint Petersburg ◽

The City

Pre-school facilities are considered to be specific buildings in the matter of construction and renovation. Space-planning features in design for pre-school facilities create special conditions for solar power use to ensure heat and power supply. The article deals with estimation of incoming solar power in reference to the surfaces oriented in different cardinal directions under the weather conditions of the city of Saint-Petersburg (Russia) and the city of Nish (Serbia). A model of how to ensure power supply for a kindergarten of the city of Nish is presented on the basis of the calculations analysis. The cases with regard to completed projects designed to use renewable energy sources in order to supply pre-school facilities with energy in other weather conditions are given herein.

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Electric Vehicle as an Energy Storage for Grid Connected Solar Power System

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v6.i3.pp567-575 ◽

2015 ◽

Vol 6 (3) ◽

pp. 567 ◽

Cited By ~ 1

Author(s):

E. Sheeba Percis ◽

Manivannan S ◽

Nalini A

Keyword(s):

Energy Storage ◽

Electric Vehicle ◽

Solar Irradiance ◽

Solar Power ◽

Weather Conditions ◽

Real Field ◽

Technological Advancement ◽

Atmospheric Conditions ◽

Pv System ◽

Point Tracking

In the past few years the growing demand for electricity and serious concern for the environment have given rise to the growth of sustainable sources like wind, solar, tidal, biomass etc. The technological advancement in power electronics has led to the extensive usage of solar power. Solar power output varies with the weather conditions and under shading conditions. With the increasing concerns of the impacts of the high penetration of Photovoltaic (PV) systems, a technical study about their effects on the power quality of the utility grid is required. This paper investigates the functioning of a grid-tied PV system along with maximum power point tracking (MPPT) algorithm. The effects of varying atmospheric conditions like solar irradiance and temperature are also taken into account. It is proposed in this work that an Electric Vehicle (EV) can be used as an energy storage to stabilize the power supplied to the grid from the photovoltaic resources. A coordinated control is necessary for the EV to obtain desired outcome. The modeling of the PV and EV system is carried out in PSCAD and the proposed idea is verified through simulation results utilizing real field data for solar irradiance and temperature.

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Solar Power Plant Generation Short-Term Forecasting Model

MATEC Web of Conferences ◽

10.1051/matecconf/201820804004 ◽

2018 ◽

Vol 208 ◽

pp. 04004

Author(s):

Stanislav Eroshenko ◽

Elena Kochneva ◽

Pavel Kruchkov ◽

Aleksandra Khalyasmaa

Keyword(s):

Power Plant ◽

Power Plants ◽

Solar Power ◽

Weather Conditions ◽

Solar Power Plant ◽

Short Term ◽

Variable Capacity ◽

Solar Power Plants ◽

Rapid Pace ◽

Short Term Forecasting

Recently, renewable generation plays an increasingly important role in the energy balance. Solar energy is developing at a rapid pace, while the solar power plants output depends on weather conditions. Solar power plant output short-term forecasting is an urgent issue. The future electricity generation qualitative forecasts allow electricity producers and network operators to actively manage the variable capacity of solar power plants, and thereby to optimally integrate the solar resources into the country's overall power system. The article presents one of the possible approaches to the solution of the short-term forecasting problem of a solar power plant output.

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Performance of parabolic through solar power plant under weather conditions of the Oujda city in Morocco

Applied Solar Energy ◽

10.3103/s0003701x17010121 ◽

2017 ◽

Vol 53 (1) ◽

pp. 45-52 ◽

Cited By ~ 7

Author(s):

H. Ait Lahoussine Ouali ◽

R. Guechchati ◽

M. A. Moussaoui ◽

A. Mezrhab

Keyword(s):

Power Plant ◽

Solar Power ◽

Weather Conditions ◽

Solar Power Plant

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A Novel Hybrid Model for Short-Term Forecasting in PV Power Generation

International Journal of Photoenergy ◽

10.1155/2014/569249 ◽

2014 ◽

Vol 2014 ◽

pp. 1-9 ◽

Cited By ~ 30

Author(s):

Yuan-Kang Wu ◽

Chao-Rong Chen ◽

Hasimah Abdul Rahman

Keyword(s):

Power Output ◽

Solar Power ◽

Peak Load ◽

Weather Conditions ◽

Green Energy ◽

Weather Data ◽

Stable Operation ◽

Short Term ◽

Pv System ◽

Experimental Database

The increasing use of solar power as a source of electricity has led to increased interest in forecasting its power output over short-time horizons. Short-term forecasts are needed for operational planning, switching sources, programming backup, reserve usage, and peak load matching. However, the output of a photovoltaic (PV) system is influenced by irradiation, cloud cover, and other weather conditions. These factors make it difficult to conduct short-term PV output forecasting. In this paper, an experimental database of solar power output, solar irradiance, air, and module temperature data has been utilized. It includes data from the Green Energy Office Building in Malaysia, the Taichung Thermal Plant of Taipower, and National Penghu University. Based on the historical PV power and weather data provided in the experiment, all factors that influence photovoltaic-generated energy are discussed. Moreover, five types of forecasting modules were developed and utilized to predict the one-hour-ahead PV output. They include the ARIMA, SVM, ANN, ANFIS, and the combination models using GA algorithm. Forecasting results show the high precision and efficiency of this combination model. Therefore, the proposed model is suitable for ensuring the stable operation of a photovoltaic generation system.

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Development of a Solar-Powered Unmanned Aerial Vehicle for Extended Flight Endurance

Drones ◽

10.3390/drones5020044 ◽

2021 ◽

Vol 5 (2) ◽

pp. 44

Author(s):

Yau Hei Chu ◽

Chun Leung Ho ◽

Yoon Jo Lee ◽

Boyang Li

Keyword(s):

Power System ◽

Unmanned Aerial Vehicle ◽

Flight Control ◽

Solar Power ◽

Weather Conditions ◽

Solar Panels ◽

Experimental Conditions ◽

Aerial Vehicle ◽

Solar Powered ◽

Power System Performance

Having an exciting array of applications, the scope of unmanned aerial vehicle (UAV) application could be far wider one if its flight endurance can be prolonged. Solar-powered UAV, promising notable prolongation in flight endurance, is drawing increasing attention in the industries’ recent research and development. This work arose from a Bachelor’s degree capstone project at Hong Kong Polytechnic University. The project aims to modify a 2-metre wingspan remote-controlled (RC) UAV available in the consumer market to be powered by a combination of solar and battery-stored power. The major objective is to greatly increase the flight endurance of the UAV by the power generated from the solar panels. The power system is first designed by selecting the suitable system architecture and then by selecting suitable components related to solar power. The flight control system is configured to conduct flight tests and validate the power system performance. Under fair experimental conditions with desirable weather conditions, the solar power system on the aircraft results in 22.5% savings in the use of battery-stored capacity. The decrease rate of battery voltage during the stable level flight of the solar-powered UAV built is also much slower than the same configuration without a solar-power system.

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Energetic & exergetic analysis of a parabolic trough: concentrated solar power plant

Acta Innovations ◽

10.32933/actainnovations.40.2 ◽

2021 ◽

pp. 19-30

Author(s):

Mohit Nagpal ◽

Rajesh Maithani ◽

Suresh Kumar

Keyword(s):

Power Plant ◽

Solar Power ◽

Design Parameters ◽

Operating Parameters ◽

Solar Power Plant ◽

Concentrated Solar Power ◽

Parabolic Trough ◽

Energy And Exergy ◽

Exergetic Analysis ◽

Lower Temperature

Solar energy is the most affordable source of energy. Parabolic trough systems are used to concentrate and extract heat, therefore it’s very significant to analyse its performance in terms of energy and exergy. Exergy based analysis of the system ensures the eradication of losses, resulting in the yield of energy of the highest quality. In this paper, an investigation has been carried out using numerical simulation with an objective of analysis of Parabolic Trough Collectors on the basis of energy and exergy. Detailed second law analysis has been performed by varying the system and operating parameters through computer simulation. Exergy output has been determined by analysing the effect of major system parameters, namely, mirror reflectivity, glass transmissivity, absorptivity, the diameter of glass envelop, and the receiver. The operating parameters considered in the investigation are insolation and temperature rise parameters. The extensive investigation of the parabolic trough of a concentrated solar power plant for various design parameters in the range of operating parameters reveals that it is beneficial to operate the system at higher temperature as opposed to the preference of the operating system at lower temperature from purely thermal considerations.

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Study of the solar power plant power generation forecasting model.

Journal of Electrical and power engineering ◽

10.31474/2074-2630-2021-1-73-76 ◽

2021 ◽

Vol 24 (1) ◽

pp. 73-76

Author(s):

KARDASH D. ◽

◽

LYUBIMENKO, E.N. ◽

KONDRATENKO, V. ◽

TYUTYUNNYK, N. ◽

...

Keyword(s):

Power Plant ◽

Power Plants ◽

Solar Power ◽

Analytical Data ◽

Weather Conditions ◽

Structural Features ◽

Energy Output ◽

Solar Power Plant ◽

Photovoltaic Panel ◽

Nonlinear Object

The question of determining the possible capacity of a photovoltaic power plant is very acute due to the growing demand for renewable energy, coupled with the fact that during the day we have limited time to generate energy from such a source. Thus, based on the obtained analytical data, which allows to predict weather conditions, it is possible to regulate the amount of energy supplied to the network in a certain way due to more maneuverable power plants. In previous years, electrical engineering scientists and researchers from different countries have developed and implemented methods for determining weather conditions, such as clouds, air temperature, atmospheric dust and others, as well as their impact on the energy output of a solar power plant. A photovoltaic panel is a complex nonlinear object with many variables. In addition to the structural features of the module, the output is most affected by solar radiation and panel temperature. When researching the prediction of the amount of energy produced, it is important to find sufficiently reliable and consistent data. At the forefront of these issues are US universities and research centers. For example, the University of Nevada in Las Vegas, in 2006 put into operation a set of measurements of weather conditions: the level of sunlight, ambient temperature, wind speed, humidity and others. When calculating the power generated by the panels, it is assumed that the system operates at the point of maximum power. The scheme works as follows: we set the values of temperature (Temperature) and irradiation (Irradiance); we apply voltage to the output terminals of the array by changing its value from 0 to Voc. We take current readings at each point, we find the power for each point, we find the maximum among the obtained array of points. Repeat over the entire range of input values. Thus, we obtain a graph of the output power of Figs. 4 pre-considering the losses in the inverter.

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