scholarly journals Assessment of the Performance for a Hybrid PV / Solar Chimney

2018 ◽  
Vol 7 (4.37) ◽  
pp. 114
Author(s):  
Abdullah Sabah Hussein ◽  
Omer Khalil Ahmed
Keyword(s):  
Energy Production ◽  
Summer Season ◽  
Solar Panel ◽  
Solar Chimney ◽  
Air Velocity ◽  
Northern Iraq ◽  
Glass Cover ◽  
Pv Panel ◽  
Typical Day ◽  
Maximum Rise

In this study, we assessed the performance of a new design of the solar chimney by merging the collector through integrated solar panel by using a solar cell as a glass roof. Assessment of the performance of this new design is the main purpose of this study. Experimental work conducted at Kirkuk (35.46 oN, 44.39 oE) northern Iraq. The experiments conducted during the summer season. A hybrid solar chimney consisting of a solar panel cover replaces the glass cover in the conventional solar chimney. Different instruments used to measure temperature, air velocity, electric current and voltage of solar panel. An experimental model was built to anticipate the performance of a hybrid chimney.It has been shown, that there is an increase in the temperature of the PV panel from the beginning of the day with increased of the incident solar radiation values. It is observed that the angle (45) is the best angle for the energy production. Also, it is noted that (45-panel angle) gives the highest efficiency to this system of the three angles that have been measured (30°, 35°, 45°). The results showed the efficiency of the PV/ solar chimney ranges from 8 % to 13 %. The maximum rise of the air temperature in the solar collector it is found to be 2–3 oC on a typical day.  

Experimental and Theoretical Investigation of Performance of a Solar Chimney Model, Part I: Experimental Investigation

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Essaied M Shuia ◽  
Bashir H Arebi ◽  
Ibrahim A abuashe
Keyword(s):  
Experimental Data ◽  
Wind Speed ◽  
Solar Radiation ◽  
Air Temperature ◽  
Solar Collector ◽  
Experimental Results ◽  
Internal Diameter ◽  
Solar Chimney ◽  
Air Velocity ◽  
Collector Temperature

This paper presents the experimental data that was collected from small pilot solar chimney. The experimental data together with ambient conditions are used to evaluate the performance and study the behavior of the solar chimney; this data will be used for comparison with theoretical models in another paper [part II). The solar chimney prototype was designed and constructed at the Subrata Faculty of Engineering-Libya. The data were collected over several days of June 2011. The solar chimney system contains two main components; the solar collector and the solar chimney. The solar collector root‘ has a circular area of126 m3, the solar chimney is a PVC tube with internal diameter of 0.2 m and the total height of chimney is 9.3 m. The measurements include the intensity of solar radiation inside/outside the collector, temperature and velocity of air at the entrance of the chimney, temperature and speed of wind outside the collector, temperature of the ground inside collector al1d temperature measurements of air at speci?c points at different levels throughout the collector. Solar irradiance was found to affect the chimney temperature and subsequently affects chimney air velocity. The experimental results showed that temperature differences of (30 - 45°C) were recorded between the ambient temperature and that of air inside the chimney in the middle of the day, where the highest air temperature of 73.4°C was recorded at the entrance of the solar chimney. The maximum air velocity of 3.6 m/s was recorded inside the solar chimney at noon on 9 June. Wind speed outside the collector had a small effect on the speed of the air inside the chimney and tends to change slightly, hence, can neglect influence of wind speed on the performance of the system. Also the experimental results indicate that such type of system can trap a suf?cient amount of solar radiation, which elevates the air temperature to a suf?cient value able to generate enough air ?ow to operate a wind turbine to produce electricity; this means the solar chimney system for electricity production can work in the north-western part of Libya in the summer time at least.

scholarly journals Solar Chimney Model Parameters to Enhance Cooling PV Panel Performance

2013 ◽  
Vol 7 (2) ◽  
Author(s):  
Mohammed Sh Elden ◽  
K. Sopian ◽  
Fatah O. Alghoul ◽  
Abdelnasser Abouhnik ◽  
Ae. Muftah M.
Keyword(s):  
Model Parameters ◽  
Solar Chimney ◽  
Pv Panel

scholarly journals Spectral Filtering Copper Coated Hibiscus-Methanol Extract for Photovoltaic Module Applications

2019 ◽  
Vol 9 (2) ◽  
pp. 2894-2897
Keyword(s):  
Methanol Extract ◽  
Weather Conditions ◽  
Solar Panel ◽  
Photovoltaic Module ◽  
Spectral Filtering ◽  
Pv Panel ◽  
Harmful Radiation

This research focuses on ways to protect the photovoltaic solar panel from harmful radiation during harsh weather conditions. The bio-filter made up of copper coated hibiscus extract from methanol was proposed. It was discovered that the bio-filter was able stabilize the fluctuations and in some cases improved on the output of the PV panel. It was recommended that the onward study on this kind of bio-filter would enhance higher patronage of PV products in the African market.

scholarly journals Experimental Investigation on The Effect of Divergent Tower Solar Chimney on The Theoretical Power Potential

2021 ◽  
Vol 81 (1) ◽  
pp. 140-149
Author(s):  
Ahmad Jawad ◽  
Mohd Suffian Misaran ◽  
Md. Mizanur Rahman ◽  
Mohd Azlan Ismail
Keyword(s):  
Power Plant ◽  
Cost Ratio ◽  
Main Body ◽  
Test Results ◽  
Solar Chimney ◽  
Air Velocity ◽  
Higher Temperature ◽  
Electric Heat ◽  
Solar Chimney Power Plant ◽  
Tall Structure

Solar chimney power plant is a sustainable alternative for electricity generation using solar as the source of energy. In general, the main body of a solar chimney plant requires a tall structure which is costly and challenging to construct. Thus, it is important to increase the performance of the solar chimney power plant and have a better energy-cost ratio. This study aims to experimentally investigate the influence of divergent solar chimney as opposed to a cylindrical chimney on solar chimney performance. Three divergent scaled-down solar chimney model at 1-meter, 1.5-meter and 2-meter were fabricated and tested for its performance at various simulated heat loads. The test results were compared with similar heights cylindrical solar chimney. The experiments show that divergent solar chimney increases the theoretical power generation potential and improves the stalk effect and have higher outlet velocity compared to a cylindrical solar chimney. The power potential of the divergent chimney is increased up to 18 times with the maximum theoretical power obtain at 0.183W on the 2-meter divergent chimney. Higher temperature was recorded on the 2-meter divergent chimney outlet at 341.3k compared to 330.4k on the cylindrical chimney indicates better stack effect. The highest average velocities in the divergent and cylindrical chimneys were recorded under the electric heat load of 2 kW at 0.994 m/s and 0.820 m/s respectively in the 1-meter configuration. It is also observed that the air velocity in a shorter divergent chimney is higher than taller divergent chimney models while better compared to all cylindrical height. This study finds that a shorter divergent solar chimney produces greater energy compared to a higher cylindrical solar chimney. Therefore, it is possible to reduce the overall cost of solar chimney by reducing the height of the main structure without sacrificing the performance of the solar chimney.

scholarly journals Performance estimation of photovoltaic energy production

2020 ◽  
Vol 13 (3) ◽  
pp. 267-285
Author(s):  
Laura Casula ◽  
Guglielmo D’Amico ◽  
Giovanni Masala ◽  
Filippo Petroni
Keyword(s):  
Solar Radiation ◽  
Energy Production ◽  
Performance Estimation ◽  
Spot Price ◽  
Solar Panels ◽  
Pv System ◽  
Vector Autoregressive Models ◽  
Vector Autoregressive ◽  
Pv Panel ◽  
Payment Policies

AbstractThis article deals with the production of energy through photovoltaic (PV) panels. The efficiency and quantity of energy produced by a PV panel depend on both deterministic factors, mainly related to the technical characteristics of the panels, and stochastic factors, essentially the amount of incident solar radiation and some climatic variables that modify the efficiency of solar panels such as temperature and wind speed. The main objective of this work is to estimate the energy production of a PV system with fixed technical characteristics through the modeling of the stochastic factors listed above. Besides, we estimate the economic profitability of the plant, net of taxation or subsidiary payment policies, considered taking into account the hourly spot price curve of electricity and its correlation with solar radiation, via vector autoregressive models. Our investigation ends with a Monte Carlo simulation of the models introduced. We also propose the pricing of some quanto options that allow hedging both the price risk and the volumetric risk.

A Simulation of the Thermal Performance of a Small Solar Chimney Already Installed in a Building

2012 ◽  
Vol 135 (1) ◽  
Author(s):  
J. Arce ◽  
J. P. Xamán ◽  
G. Álvarez ◽  
M. J. Jiménez ◽  
R. Enríquez ◽  
...  
Keyword(s):  
Flow Rate ◽  
State Energy ◽  
Theoretical Study ◽  
Volumetric Flow Rate ◽  
Metallic Plate ◽  
Balance Equations ◽  
Solar Chimney ◽  
Concrete Wall ◽  
Glass Cover ◽  
Heat Absorber

In this paper we present a theoretical study of a small solar chimney. The dimensions of the solar chimney channel are 1.95 m high, 1.70 m wide, and 0.24 m deep. The channel of the solar chimney has in its backside a metallic plate as a solar heat absorber, and it is attached to a concrete wall, which acts as storage and thermal insulation. On the front part of the chimney a glass cover is used to decrease the heat losses to the exterior. For this theoretical study, the steady-state energy balance equations were solved numerically for each element of the solar chimney. The results showed the temperature profiles for the glass cover, the air inside the channel, and the metallic plate. Also, the air mass flow rate was determined. When solar irradiance increases from 100 to 700 W/m2, the maximum instantaneous efficiency of the system varies from 28% to 37%, and also, the volumetric flow rate increases from 61 to 147 m3/h.

scholarly journals Analisis Energi Aktual Purata per Minggu yang Dihasilkan Solar Panel 20 WP di Kota Bekasi

MESIN ◽  
2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Jamal M Afiff ◽  
Gusti Firdaus Alamhudi
Keyword(s):  
Energy Production ◽  
Alternative Energy ◽  
Average Power ◽  
Average Energy ◽  
Solar Panel ◽  
Tropical Country ◽  
Real Condition ◽  
Know How ◽  
System A ◽  
Power And Energy

<p><em>Solar panel is gaining popularity as one of the source of alternative energy especially in tropical country. Solar panel users need to know how much energy is produced and what components it takes before starting to make a solar panel system. A comparison between ideal energy and actual energy will help to evaluate the performance of solar panel to show how much energy it will produce under a real condition. In this research, a 20 WP solar panel was used and the data collection was performed from 9 May 2018–9 July 2018 in Bekasi City. Collected data are voltage and current produced by the solar panel every ten minutes for ten hours continuous measurements. The solar panel performance was analysed by comparing maximum power, average power, and energy production per week. From the data measurements and analysis, it is found that the total energy produced is 3797 Wh, the average energy produced in one day is 61.24 Wh, and the average peak hour is 11.20 a.m.</em><em></em></p>

Optimization of Fixed Photovoltaic Panel “Tilt” Angles for Maximal Energy Harvest Considering Year-Around Sky Coverage Conditions

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Ammar Omar Gwesha ◽  
Peiwen Li ◽  
Yasir Mohammed Alfulayyih
Keyword(s):  
Solar Energy ◽  
Elevation Angle ◽  
Electrical Energy ◽  
Small Time ◽  
Solar Panel ◽  
Energy Harvest ◽  
Photovoltaic Panel ◽  
Fixed Angle ◽  
Maximal Energy ◽  
Pv Panel

Abstract The fixed setup angles of photovoltaic (PV) panels are typically optimized properly in order to maximize the electrical energy harvest. In the present work, the sunlight availability or sky coverage conditions of sufficiently small time intervals for everyday around the year are counted in the modeling for computation of solar energy on the PV panel in order to optimize the panel tilt angles. Maximal energy harvest in a year is the objective of choosing the optimal tilt angles. The analysis calculates vectors of instantaneous sunray and solar panel normal direction to consider the ‘cosine’ effect. The energy harvested in every 6 min by a PV panel of per square meter is summated for day-long period from sunrise to sunset when the sun elevation angle is above 5 deg. The general model is applied to the authors’ local city, Tucson, Arizona, USA. The results show that the annual solar energy received by a solar panel tilted with a fixed angle of equal to the local latitude could reach to 2297 kWh/m2 with the 10-year averaged sky coverage conditions of every 6 min considered. However, if a PV panel is inclined using the discovered optimal angles with two times, four-seasonal, and monthly adjustments, the gain in the yearly solar energy harvest can be 7.59%, 7.60%, and 9.19%, respectively, greater than that with the fixed angle equal to local latitude.

Performance of a Solar Chimney With a Modified Collector Geometry: A Case Study From Erbil to the North of Iraq

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Dara Khalid Khidhir ◽  
Soorkeu A. Atrooshi
Keyword(s):  
Solar Radiation ◽  
Ambient Temperature ◽  
Temperature Difference ◽  
Mechanical Energy ◽  
Maximum Temperature ◽  
Geometrical Shape ◽  
Solar Chimney ◽  
Air Velocity ◽  
Temperature Loss ◽  
Solar Intensity

Abstract The principle of solar chimney power plant (SCPP) is based on harvesting the thermal spectrum of solar radiation and converting it to mechanical energy by the means of a collector, a wind turbine, and a chimney. In this work, a number of experiments were performed on a modified model made up of one-third of the circular collector area. Field data from selected clear, sunny days were recorded and studied. The analysis focused on time-temperature relations for ambient, near chimney entry point and the collector periphery, in addition to hourly solar radiation intensity and air velocity inside the chimney. The results show that for this geometry arrangement, the maximum temperature of the air entering the chimney is achieved before the ambient temperature reaches its peak value. Air velocity inside the chimney depends on the intensity of solar radiation and the temperature difference between the air temperature entering the chimney and the ambient temperature. Solar intensity directly affects the temperature of air beneath the collector, and a part of this energy is stored in the ground. Later, when the solar radiation is impaired, the stored energy can be utilized. Air velocity of 2.1 m/s is obtained after the solar noon, when the solar intensity is 737 W/m2 and the maximum temperature difference is 11.2 °C. Due to the unique geometrical shape of the rig, a minor temperature loss of up to 1.3 °C occurs for the air near the center of the chimney.

Numerical and experimental study of the impact of conical chimney angle on the thermodynamic characteristics of a solar chimney power plant

2019 ◽  
Vol 233 (5) ◽  
pp. 1185-1199 ◽  
Author(s):  
Haythem Nasraoui ◽  
Zied Driss ◽  
Ahmed Ayadi ◽  
Abdallah Bouabidi ◽  
Hedi Kchaou
Keyword(s):  
Power Plant ◽  
Power Output ◽  
Thermodynamic Characteristics ◽  
Solar Chimney ◽  
Efficient System ◽  
Conical Angle ◽  
Mathematical Correlation ◽  
Typical Day ◽  
Solar Chimney Power Plant ◽  
The Impact

The goal of this paper is to study and optimize the conical chimney angle (α) of a divergent solar chimney power plant (DSCPP) by using CFD technique. The local airflow characteristics were analyzed in four configurations with different conical angles α = 0°, α = 3°, α = 6° and α = 9°. The first design is validated experimentally by using a pilot prototype build at the National School of Engineers of Sfax, Tunisia. In addition, some experimental results of the temperature, the velocity and the power output were presented during a typical day. A novel mathematical correlation was developed to prove the effect of the conical angle and the DSCPP scale on the power output. In fact, the relationship between the optimum conical angle and the system scale was performed based on both quadratic and cubic regressions. The computational results ensure that the conical chimney angle presents a parabolic tendency with the turbulence airflow characteristics and the power output. The performance of the DSCCP was degraded since the conical angle is greater than α = 3°. Furthermore, the optimum angle decreases with an increasing system scale. A commercial solar chimney with a conical angle around α = 1° presents an efficient system.

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