scholarly journals Solar Energy as an alternative source in boiler economizers

2021 ◽  
Vol 19 ◽  
pp. 276-281
Author(s):  
A. Daniel Pereira de Oliveira ◽  
◽  
B. Aylton Alves ◽  
Bárbara Morais Arantes ◽  
Keyword(s):  
Solar Energy ◽  
Solar Collector ◽  
Thermal Power ◽  
Feed Water ◽  
Solar Panels ◽  
Water Heater ◽  
Alternative Source ◽  
Second Stage ◽  
Solar Field ◽  
Feed Water Temperature

This study sought to analyze the viability of the use of solar energy, for the operation in boiler economizers, in the replacement of the thermal energy of the exhaust gases. The experiment was divided in two steps: analysis of the boiler yield with different feed water temperatures and addition of the solar field to the initial set. For the modeling of the economizer-boiler set, the software used was Engineering Equation Solver (Software F-Chart, Wisconsin, USA). The technology chosen for the second stage was the high-pressure vacuum solar collector, installed at the inlet of the feed water heater. The thermal power of 2014W (per plate) and the solar radiation peak of 1000W / m² were standardized, taking into account the calculations for a steady state system at noon. The variable was the number of solar panels to be used at the plant. After analyzing the data, it was verified that the efficiency varied by approximately 7.4%, when the feed water temperature was increased by 20 ° C, close to 48 ° C. In order for this variation to occur, it was necessary to use 50 plates.

scholarly journals Water-air regenerative heat exchanger with increased heat exchange efficiency

2021 ◽  
Vol 295 ◽  
pp. 04005
Author(s):  
Sergey Batukhtin ◽  
Andrey Batukhtin ◽  
Marina Baranovskaya
Keyword(s):  
Renewable Energy ◽  
Solar Energy ◽  
Solar Collector ◽  
Renewable Energy Sources ◽  
Thermal Power ◽  
Economic Effect ◽  
Hot Water ◽  
Energy Sources ◽  
Water Supply Systems ◽  
Regenerative Heat

According to experts’ forecasts, by 2040 the global demand for energy will increase by 37%, and renewable energy sources in the next 20 years will become the fastest growing segment of the world energy, their share in the next decade will grow by about one and a half times. Solar energy is the fastest growing industry among all non-conventional energy sources and is gaining the highest rates of development in comparison with other renewable energy sources. In this article, the authors provide an overview of the technologies that increase the efficiency and productivity of solar panels, only the investigated methods are described that can speed up the process of introducing solar energy instead of traditional. All the methods described can increase the efficiency of systems that are based on the use of the sun as the main source of energy. The authors presented and described the scheme of a solar-air thermal power plant, which will improve energy efficiency through the use of a regenerative air solar collector with increased heat transfer efficiency. Strengthening will be achieved through the use of hemispherical depressions on the surface that receives solar radiation. A schematic diagram is given and the principle of operation of such a solar collector is described in detail. A comparative calculation of the intensification of the solar collector with the use of depressions and without the use as modernization was carried out, on the basis of which a conclusion was made about the efficiency of using this type of solar collector and the economic effect from the application of this method. A description of the method for calculating the solar collector is given, thanks to which this development can be used and implemented in existing heating and hot water supply systems.

scholarly journals Investigation of Performance of Solar Flat and Curved Plate Collectors through Numerical Simulations

2021 ◽  
Vol 40 (1) ◽  
pp. 66-74
Author(s):  
Luqman Ahmed Pirzada ◽  
Xiaoli Wu . ◽  
Qaiser Ali ◽  
Asif Khateeb .
Keyword(s):  
Solar Energy ◽  
Flat Plate ◽  
Solar Collector ◽  
Numerical Study ◽  
Hot Water ◽  
Working Fluid ◽  
Solar Panels ◽  
Modeling Tools ◽  
Design Work ◽  
Flat Plate Collector

Solar energy is radiant light as a form of thermal heat energy which can be obtained and used by means of a variety of solar apparatus. As apparatus the flat and curved plate solar collector is specifically designed for assembling solar energy as a solar water heater system. The designing potency of this collector lone can generate medium level hot water from radiant sunlight source via absorbed plates. Standard type flat and curved plates solar collector plates are mostly used in remote coldest regions of the world where hot water is consumed for commercial and domestic purposes. These types of solar collector Plates can cheaply be manufactured compared to other solar panels like solar Shingles, Polycrystalline Solar Panels, Mono-crystalline Solar Panels, and Thin Film Solar Panels. For future work, this proposed pre-design is recommended for fabrication. A numerical study was carried-out on eight city locations in China by tracing their horizontal and vertical longitudinal, latitudinal lines noting the date, time and sunlight feeding of temperatures in the Celsius scale with the help of simulation and modeling tools like CFD, ANSYS FLUENT software, mesh geometry tools, and by using the Navier-Stokes and Continuity equations by fluid flow discharge rate, mass flow, water temperature and dropping of temperature, radiation working mechanisms, dimensions of water flowing tubes and absorber plates, density, the velocity of water as the working fluid, the viscosity of water in a cold and hot state as a process of Pre-design. Work also focuses on the comparison between flat plate collector and curved plate collector radiant sunlight absorption, As end result it is found the Curved plate collector produces 22% more elevated heat of outgoing water than flat plate collector.

scholarly journals Penggunaan Pembangkit Listrik Tenaga Surya Sebagai Sumber Energi Pada Kapal Nelayan: Suatu Kajian Literatur

2020 ◽  
Vol 4 (2) ◽  
pp. 101
Author(s):  
I Made Aditya Nugraha
Keyword(s):  
Solar Energy ◽  
Environmental Sustainability ◽  
Power Plants ◽  
Positive Impact ◽  
Electrical Energy ◽  
Electrical Equipment ◽  
Health Economy ◽  
Solar Panels ◽  
Scientific Publications ◽  
Alternative Source

The need of electricity in every ship are very diverse. Power plants for using diesel as an engine can also come from sunlight as an alternative source of electrical energy. The measurement of solar energy in Indonesia is 4.8 kWh /m2. This renewable energy is in suitable for the Indonesian topography. Thus, the energy from the sunlight around the equator is so abundant that its availability is always available throughout the year, except when it rains. Utilization of solar energy can be used as a substitute for conventional energy which is starting to be limited and the price is quite expensive. Therefore, the data that are presented in this paper comes from publications, manufacturers, relevant official government documents, scientific publications and other publications. Utilization of solar energy as electrical energy can be done by using solar panels mounted in ships. The generated electricity can be used to turn on electrical equipment and send lights at night, and can be used as fishing aids. The use of solar power plant can also have a positive impact on fishermen, such as improving health, economy, environmental sustainability, and building independent fishermen.

scholarly journals A New Approach to Solar Desalination Using a Humidification–Dehumidification Process for Remote Areas

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1120
Author(s):  
Mishal Alsehli
Keyword(s):  
Solar Energy ◽  
Solar Collector ◽  
Critical Issue ◽  
Feed Water ◽  
Daily Production ◽  
New Approach ◽  
Remote Areas ◽  
Solar Desalination ◽  
Two Phases ◽  
Solar Powered

Freshwater supply in remote areas has become a critical issue. This paper aims to introduce a new approach to a solar-powered humidification–dehumidification (HDH) desalination system. The design uses a solar collector, a thermal storage tank, and an HDH unit. The HDH works continuously by feeding water to absorb solar energy during the day and then relaying the desalination units with feed water at a top brine temperature (TBT) at night. The model predicts the amount of solar energy stored for the next day, and based on this, the amount of feed water that should be raised to the TBT is calculated. The system operation is carried out in two phases. During the day, the feed water absorbs the heat of solar energy, thereby increasing its temperature to TBT. This hot feed water is then kept in storage tanks. At night, the tank switches to discharging mode and starts feeding the HDH with the hot feed water. The system is designed so that the roles of the tank are rotated at sunset. To achieve the same TBT every day in response to changes in the available solar energy, the mass of the feed water is adjusted daily. The design is simulated using a dynamic model of the energy and mass balance resulting in an average daily production of 7.6 kg of fresh water per unit area of the solar collector. The daily average of the gain output and the recovery ratios are 0.3 and 0.09 respectively.

Model Energi Pembangkit Listrik Tenaga Surya di Pulau Giliyang Madura

2018 ◽  
Vol 2 (2) ◽  
pp. 81
Author(s):  
Nurhadi Nurhadi ◽  
Mochammad Ali M ◽  
Daif Rahuna ◽  
Sutopo P. Fitri
Keyword(s):  
Solar Energy ◽  
Power Systems ◽  
Energy Demand ◽  
Alternative Energy ◽  
Thermal Power ◽  
Electrical Energy ◽  
Solar Photovoltaic ◽  
Solar Panels ◽  
Solar Thermal Power ◽  
Storage Media

Giliiyang Island is a famous island that has the highest oxygen content in the world, and very beautiful sea, but the location is far from PLN / elctictric grid system. It is necessary to develop environmentally friendly alternative energy. One of alternative energy offered is solar energy. Solar energy is energy that’s form of light and heat from the sun. This energy can be utilized using a range of technologies such as solar heating, solar photovoltaic, solar thermal power, solar architecture, and artificial photosynthesis. Based on the calculation is known that the electrical energy demand for Giliiyang Island is around 1984 kWh. The design of two off-grid solar power systems which each capacity about 1 MWp will require 3000 m2 of land with 780 solar panels that have an intensity of 800 W / m2. Deep cycle battery with 24 V DC 200 AH as storage media required about 504 pieces.

Repowering of a Rankine Cycle Power Plant by Means of Concentrating Solar Collectors

2011 ◽  
Author(s):  
Sergio M. Camporeale ◽  
Bernardo Fortunato ◽  
Alessandro Saponaro
Keyword(s):  
Power Plant ◽  
Solar Energy ◽  
Steam Turbine ◽  
Power Plants ◽  
Thermal Power ◽  
Peak Load ◽  
Rankine Cycle ◽  
Feed Water ◽  
Partial Load ◽  
Steam Turbine Condenser

Repowering of an existing steam power plant by means of solar concentrating collectors is examined as a viable option to decrease CO2 emissions and increase electric power production during daytime peak load energy demanding hours. In the proposed scheme, the regenerative bleeds from the steam turbine are partially intercepted while boiler feed-water is heated by means of parabolic solar trough concentrating collectors. It is considered that fossil boiler, steam turbine and condenser are the same of the original plant, without modifications. After choosing a steam cycle reproducing an existing power plant, the scheme of solar repowering is examined and the efficiency of conversion of the solar energy is optimized in relation to the characteristics of the solar collector. The paper shows that the modified scheme produces very little effects on the working conditions of the existing components, either at full load or partial load, and does not reduce the conversion efficiency of the fossil fuel. In comparison with solar thermal power plants with heat storage and only solar energy as thermal input, the proposed scheme is expected to have comparable efficiency but lower costs per kWh produced, as a consequence of the fact that there is no need for steam turbine, condenser, cooling tower and auxiliary boiler. Moreover it is expected that personnel and maintenance costs will be lower.

scholarly journals Optimizing Large-Scale Solar Field Efficiency: Latvia Case Study

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4171
Author(s):  
Ilze Polikarpova ◽  
Roberts Kakis ◽  
Ieva Pakere ◽  
Dagnija Blumberga
Keyword(s):  
Solar Energy ◽  
Influencing Factors ◽  
Heat Carrier ◽  
Thermal Energy ◽  
Solar Collector ◽  
Energy Production ◽  
Large Scale ◽  
District Heating ◽  
Field Efficiency ◽  
Solar Field

Solar energy transformation technologies are increasingly being used worldwide in the district heating sector. In the Baltic states, only one district heating company has implemented a large-scale solar collector field into its thermal energy production system, which is analyzed within this research. In this study, we analyzed the first year operation of the solar field, solar collector efficiency, and several influencing factors, i.e., ambient air temperature, heat carrier flow, and the temperature difference between the supply and return heat carrier temperatures. The study includes collecting and compilation of the data, analyzing influencing factors, and data analysis using the statistical analysis method. In addition, the research presents a simplified multi-regression model based on the actual performance of a large-scale solar field, which allows for forecasting the efficiency of solar collectors by taking into account the main operational parameters of the DH system. The results show that solar energy covers around 90% of the summer heat load of a particular district heating system. However, they also show room for improvements in producing all the necessary heat in the summer using solar energy. The regression analyses show that the most significant correlation between all parameters examined was obtained in May, reaching R2 = 0.9346 in solar field efficiency evaluation. This is due to several suitable conditions for solar energy production, i.e., placing solar collectors at an angle for them to be the most productive, having enough space in the storage tank, and the demand for thermal energy being still higher than in the summer months.

Implementation of an Integrated Solar Combined Cycle on an Existing Coal Fired Power Plant

2010 ◽  
Author(s):  
Eric Reitze ◽  
Hank Price
Keyword(s):  
Heat Transfer ◽  
Control System ◽  
Power Plant ◽  
Thermal Energy ◽  
Combined Cycle ◽  
Heat Transfer Fluid ◽  
Feed Water ◽  
Water Heater ◽  
Solar Field ◽  
Steam Cycle

This paper presents the implementation of an integrated solar combined cycle (ISCC) on the existing 44 MW Cameo Power Generating Station, located in Palisade, Colorado. The plant was originally built in 1957 as a coal fired power plant, to serve the Grand Junction community. This plant has been chosen to demonstrate the viability of the ISCC because of its time line to decommissioning and the availability of additional power from nearby stations to fulfill the community’s needs. The solar system at Cameo utilizes 8 aluminum parabolic trough collectors arranged in 4 loops. Each of these collectors is approximately 150 meters long and 5.77 meters wide. The hot heat transfer fluid used in the solar field is sent to a solar feed water heater, located in between two of the existing feed water heaters, to supplement the thermal energy required by the steam cycle. At design conditions, the solar field will provide 4 MW of thermal energy to the power plant. The development of this ISCC has faced several design and construction challenges not common in traditional power plant and solar power plant design. When first constructed, the Cameo station had no provisions made regarding solar field location, heat transfer fluid piping runs, heat transfer fluid pumping station, thermal expansion vessels, the addition of solar thermal energy to the feed water system, and the integration of a solar field control system into the existing plant distributed control system. Also unaccounted for are the affects the integration of a solar feed water heater has on the thermodynamic efficiency of the steam cycle. This paper discusses these challenges, as well as their resolution, as seen during the engineering, procurement, construction, and commissioning phases of this project. The Cameo Power Generating Station is located in the DeBeque Canyon, 4 miles east of Palisade, Colorado along the Colorado River and Interstate 70. The solar feed water heating demonstration will be in operation for 1 to 2 years, at the discretion of Xcel Energy, to test and develop operating and maintenance methods for large scale application. After such time, both the plant and the solar field will be decommissioned. After decommissioning all applicable solar field equipment shall be refurbished and utilized at additional testing facilities.

scholarly journals An Investigation of Hybrid Solar-Steam Power Plant: A case study in Iraq

2020 ◽  
Vol 10 (4) ◽  
pp. 199-216
Author(s):  
Dr. Karima Esmail Amori ◽  
Randa Rashid Sari
Keyword(s):  
Power Plant ◽  
Solar Collector ◽  
Thermal Power ◽  
Working Fluid ◽  
Feed Water ◽  
Outlet Temperature ◽  
Parabolic Trough ◽  
Flow Rates ◽  
Parabolic Trough Solar Collector ◽  
Side Flow

 In this work integrating Al-Zubaydia (Kut-Iraq) thermal power plant with solar thermal system is studied for heating feed water by solar energy to reduce fuel consumption and greenhouse gases emission. A closed type Parabolic Trough Solar Collector (PTSC) is designed, constructed, instrumented, and tested. Its thermal characteristics are reported under Iraq climate conditions for the period extended from June, to September 2017. The collector heat gain, efficiency, absorber temperature and heat exchanger effectiveness (considered as feed water heater) were presented for absorber side flow rates of (0.15, 0.2, 0.3, 0.4, 0.5) lpm of water or oil), and shell side water flow rates of (0.4, 0.5, 0.6lpm). Results show that the maximum obtained thermal efficiency of parabolic trough solar collector was 83.33% for oil working fluid. The maximum obtained oil outlet temperature was 106 oC at solar noon for (0.15) lpm. Theoretical results showed that the fuel save mode needs collector area of (32842 m2), while that needed for power boosting is (102569 m2) for the same thermal cycle efficiency. The fuel save mode reported a reduction in greenhouse emission.

scholarly journals Peningkatan Skill dan Pengetahuan Masyarakat tentang Instalasi Panel Surya sebagai Sumber Energi Listrik Alternatif

2020 ◽  
Vol 6 (1) ◽  
pp. 44-47
Author(s):  
Riska Ekawita ◽  
Supiyati Supiyati ◽  
Elfi Yuliza
Keyword(s):  
Solar Energy ◽  
Electric Energy ◽  
Solar Panel ◽  
Solar Panels ◽  
Alternative Source ◽  
Household Products ◽  
Before And After ◽  
Questionnaire Result

Bengkulu city has abundant solar energy that has not yet been utilized to optimize. Bengkulu people, especially the Muara Bangkahulu district, do not yet have the skills and knowledge to use solar panels to meet their daily electricity needs. In this activity, the workshop was carried out on the use and solar panel installation technique that could be used as an alternative source of electricity. Participants were the residents of RT.20/01, Pematang Gubernur sub-district, Muara Bangkahulu district, Bengkulu City. The workshop consisted of three main parts; they were filling out the questionnaire, presentation, and practice of installing a solar panel. The questionnaire was given at the time before and after the material and practice were done. Some household products that are using solar energy were delivered during the presentation. The next step was the installation practice of solar panels and their components. The questionnaire result shows that participants are attracted to use the solar panel as alternative electric energy. In addition, the community who initially has a limitation of knowledge to install a solar panel, after the workshop is carried out, they have the skill for that installation.

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