Concentrated Solar Power

A Renewable Energy Type Solar energy is, by definition, the radiant energy emitted by the sun. And, in many ways, we owe much of our different types of energy to the sun. Fossil fuel energy, discussed in Chapters 1-3, is certainly the result of solar energy, as well as millions of years of heat and pressure in the interior of the earth. Since fossil fuels are formed from the anaerobic decomposition of dead organisms, such as algae, prehistoric plants and animals, and plankton, there would be no organisms to decompose if it were not for their growth from solar energy. And, the hydroelectric power discussed in Chapter 5 also owes its energy, in part, to the sun. Rivers and streams flow downhill but the water for them comes from winter snow, glaciers, and melting; melting is caused by solar energy. As well, rivers and streams grow from rain. The rain occurs because of the sun heating the atmosphere, causing ground moisture to evaporate, rise into the atmosphere, form clouds, and eventually rain. Likewise, wind energy discussed in Chapter 6, is caused by solar energy heating the earth and causing air movement. And some energy types discussed in later chapters, ethanol (Chapter 8), biomass (Chapter 9), hydrogen (Chapter 11), and the Fischer-Tropsch synthesis (Chapter 12), use fuels that were generated by the sun. Ethanol and biomass use biofuels while hydrogen and the Fischer-Tropsch synthesis rely on fossil fuels and are therefore also the indirect result of solar energy. The only two energy types discussed in this book that do not rely on solar energy are nuclear and geothermal energy. Uranium is thought to have been formed from supernovas around 6.6 billion years ago, with a supernova being defined as a star reaching the end of its life that has an explosion ejecting most of its mass. This is certainly not something we want from our sun and, in fact, the sun is thought to not have enough mass to explode as a supernova. Geothermal energy comes from heat within the earth's core, and the source of this heat is from when the planet was formed, frictional heating from material movement, and heat from radioactive decay. This chapter focuses on the direct use of solar energy to make electricity. There are basically two methods of generating electricity from solar energy including photovoltaic (PV) solar energy and solar thermal energy. In the case of PV solar energy, sunlight is directly converted into electricity using panels made of semiconductor cells while solar thermal energy uses solar energy to heat a fluid (such a gas, oil, or molten

The Multi-Stage Flash (MSF) desalination technique continues to be a prevalent freshwater production method especially in desert areas. Its energy demands create major economic and environmental obstacles. The investigation examines cutting-edge methods to boost MSF energy performance through the integration of advanced heat

This article presents a comprehensive review of recent research on renewable-driven multigeneration systems using integrated 3E (Energy, Exergy, Environment) and Life Cycle Assessment (LCA) frameworks. The proposed integration provides a comprehensive understanding of a system's performance, identifying potential hotspots, optimizing resource utilization, and ultimately driving the development of more environmentally friendly energy solutions. The manuscript reviews the system's energy potentials (both inputs and outputs) with an emphasis on total energy efficiency and identifying areas of energy loss. The exergy analysis evaluates energy quality by measuring thermodynamic losses and irreversibility. A cost-benefit analysis is also performed to analyze the economic sustainability of the multigenerational system (MGS). The LCA provides environmental impact indicators. The innovative multigeneration systems are intended to generate many useful outputs (power, heat, hydrogen, and cooling) from renewable resources like solar or biomass. The study provides data for making educated decisions on system design, technology selection, and process optimization that fit with environmental goals and economic feasibility. The MGS improves energy and exergy efficiency by manufacturing many products at the same time, resulting in less waste and greater utilization of primary resources. Using renewable resources and producing diverse products significantly reduces carbon footprints and greenhouse gas emissions, encouraging environmental conservation and sustainability. Instead of proposing a new optimization strategy, this review synthesizes existing multi-objective optimization approaches applied to renewabledriven multigeneration systems and critically discusses the trade-offs among energy, exergy, economic, and environmental objectives within integrated 3E-LCA frameworks.

(IEA) studies on concentrated solar power and long-duration energy storage. 2. Research literature on molten salt thermal storage systems and Power-to-Heat integration. 3. Renewable dispatchability studies involving hybrid PV-CSP infrastructure and grid balancing. 4. Engineering analyses on thermal storage optimization, steam-cycle efficiency, and solar hybridization systems.

Enhanced oil recovery (EOR) or tertiary oil recovery is a process used in the oil industry to extract remaining crude oil from partially-exploited reservoirs by changing the characteristics of this underground oil (particularly for heavy viscous oil grades with an API gravity degree below about 20°) to improve its mobility. EOR takes place after a stage of secondary oil recovery, where a compressed immiscible fluid (typically liquid water) is injected into the oil formation to maintain the pressure and displace some of the remaining oil outside the oil field. In turn, secondary oil recovery takes place after a phase of primary oil recovery, when the initial natural formation pressure (assisted by lifting pumps if needed) is high enough to force the crude oil up through the oil rig. In this study, we focus on solar thermal projects in Oman at the Amal West offshore oil field in Concession Block 6 (in the southern Omani governorate of Dhofar, about 640 km south of Muscat). This oil field is fully owned and operated by Petroleum Development Oman (PDO), a leading oil and gas exploration and production company in Oman. In these projects, glasshouse-enclosed parabolic troughs are used to generate steam for thermal enhanced oil recovery (steam flooding), using solar thermal heating. These projects are: Amal I pilot project (8 MWth peak capacity), Amal II pilot project (8 MWth), and Miraah flagship project (330 MWth). If combined, these three projects can supply annually about 2 trillion Btu of heat (2 million MMBtu or 20 million therms), which is about 586 GWh or 2.11 PJ "petajoules" (approximately equivalent to 1.93 billion standard cubic feet "Bcf" or 56.5 million normal cubic meters "Nm 3 " of natural gas), and can produce daily up to 2,100 tonnes of steam. The conventional heating method of burning natural gas may release annually more than 100 kilotonnes of carbon dioxide (CO2). We discuss these EOR projects as examples of successful sustainable practices.

The need for mobile phones increases with the level of multiplicity they offer, hence a need for portable chargers. Besides, the globe is facing the need for renewable energy sources and ways of addressing global warming. The current power banks have limitations that include reliance on grid electricity, which makes them unavailable in distant areas. Hence, the project aims at designing a solar charger with a built-in mobile phone holder.This gadget uses solar cells that capture energy from the sun and store it in the form of electric power within a rechargeable battery for future use. The energy from the solar cell is eco-friendly and available worldwide. Also, the device has a 2500 mAh rechargeable battery that enhances portability without reducing its effectiveness when there is no power connection. In addition, the built-in mobile phone holder enables one to charge the phone hands-free for activities like watching videos or navigating.As seen, the performance of the device is consistent regarding electricity generation, and the range of voltage produced by it is 4.6V-5.1V, while the range of current produced is 0.9A-1.0A. The power produced by the device is 4.2W-4.8W, while its efficiency is 85%-90%, which shows efficient production of electricity using solar energy. Regarding the battery charging capacity of the device, it can charge the battery from 20% to 85% in 1-1.5 hours, and fully charge the mobile phone in 2-2.5 hours.The electrical characteristics of the solar panel have been proven to be steady; therefore, it provides a potential difference in the range from 4.6V to 5.1V and currents from 0.9A to 1.0A required for charging portable equipment. Average power consumption generated by solar panels fluctuates between 4.2W and 4.8W, whereas the efficiency of the system equals 85-90%. The charging ability of the batteries provided by this device is characterized by full charging for 2-2.5 hours. Moreover, charging the battery in the first stage within 20% to 85% lasts 1-1.5 hours, depending on sun irradiance levels. Efficiency of the charging process equals 70-80%.When it comes to charging a portable device, the efficiency is estimated at 5-8% within 30 minutes providing stable voltage in the range of ±0.2V. Backup capacity reaches 45 minutes to 1 hour. Besides, small dimensions (120×80×40mm) and light weight increase the equipment portability. Mechanical stability has been proven to be high; furthermore, thermal stability has also been proved to be relatively high, allowing moderate vibrations and heating up to 10°С.From the standpoint of the environment, the proposed device gives a possibility to reduce power consumption from the electric grid by 20-30% and to save energy by 1-2 kW/h per year. Also, this device will allow reducing the carbon dioxide footprint by 1-1.5 kg of CO₂ per year due to the application of ecologically pure energy sources.In general, the proposed solar-powered bank together with its portable holder is a convenient and environmentally friendly device which satisfies the demands of today's world regarding the power supply. The proposed device will allow people to charge devices independently, by using natural power sources.

Concentrating solar power (CSP) systems use solar absorbers to convert sunlight into thermal electric power. In CSP systems, a high reflective surface focuses sunlight onto a receiver that captures the solar energy and converts it into heat. The operation of high efficiency CSP systems involves improvements in the performance of the coatings of the solar absorption materials. To accomplish this, novel, more efficient selective coatings are being developed with high solar absorptance and low thermal losses at their operation temperature. Heat losses in a CSP system occur by three mechanisms: conduction, convection and radiation. It has been widely documented that energy losses increase with increasing operating temperature of CSP systems, and the precise knowledge of the thermophysical properties of the materials involved in CSP systems may allow us to increase the efficiency of systems. In this work, we applied the pulsed photoradiometry technique (PPTR) to evaluate the changes in the thermophysical properties of selective coatings on a variety of substrates as a function of temperature. Three types of coatings deposited with two different techniques on three types of substrate were examined: commercial coatings based on titanium oxynitride deposited by sputtering on substrates of copper and aluminum, coatings based on black nickel deposited by electrochemical methods on substrates of steel, and coatings based on black cobalt deposited by electrochemical methods on substrates of steel and copper. Values of the thermal diffusivity and thermal conductivity were obtained in the temperature range of 25 to 550 o C. Optical reflectance measurements have been performed in order to provide an estimate of the dependence of the thermal emittance on temperature using the black body radiation theory.

Solar thermal energy systems, particularly concentrated solar power (CSP) technologies, operate at high temperatures and often involve highpressure gaseous working fluids. Efficient thermal energy transfer under such extreme conditions is essential for improving system efficiency, compactness, and operational reliability. However, conventional heat exchanger designs frequently face limitations related to low gasside heat transfer coefficients, excessive pressure drop, and material degradation at elevated temperatures. This review presents a comprehensive assessment of advanced heat exchanger technologies developed for hightemperature and highpressure gas applications in solar thermal systems. Emphasis is placed on augmented and membrane-based heat exchanger configurations, including helical coils, serpentine tubes, and extendedsurface designs, which have shown strong potential for enhancing heat transfer performance. Design evolution, heat transfer mechanisms, numerical and experimental investigations, and material considerations are critically discussed. In addition, insights from highpressure gas cooling applications in industrial and underground energy systems are used to highlight transferable design concepts for solar thermal technologies. Key research gaps and future directions are identified to support the development of efficient, reliable, and scalable heat exchanger solutions for nextgeneration solar thermal power plants.