Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Through tapping into the boundless resources provided by the sea and sun, scientists have created a sustainable and cost-effective drinking water supply using solar-powered desalination. In this manuscript, utilizing gravels, sand and wick materials as the energy storage medium is one of the key sustainability modifications made for bettering the rate of evaporation within solar stills, hence enhancing the freshwater yield. Here, experiments on a single basin solar still with and without energy storage components have been carried out. Typically, energy storage materials are employed to enhance the rate of evaporation in solar stills, aiming to increase the yield of distilled water during nocturnal hours. Consequently, it was observed that using locally available heat storage materials in a solar still during daylight and overnight production of distillate for 15 liter of water input resulted in increases of 54.39 and 58.08%, respectively. In the case of upgraded solar desalination systems, the maximum thermal efficiencies were notably improved, with increases of 90.843, 84.464, and 66.326% compared to conventional solar desalination systems for water inputs of 15, 20, and 25 liters, respectively. The suggested solar still design is particularly well-suited for generating freshwater in regions with a pronounced demand, such as areas characterized by excessively saline groundwater, coastal zones, and rural locations. PubDate: 2024-07-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Driven by the scarcity of sufficient rooftop areas for PV installation in urban locations, this work assesses the performance and economic considerations of alternative vertical PV installations. A quantitative model-based analysis was conducted to estimate the percentage decrease in output of vertically installed PV modules. The results demonstrate that although vertical installations, driven by a shortage of rooftop space, do indeed result in reduced output, this decrease is deemed acceptable in many scenarios. For installations at high and medium latitude angles above 45°, vertical PV output reaches between 80 to 90% of that at the optimum tilt angle installation, and even surpasses horizontally installed panels for these latitudes. At latitudes between 25° and 45°, the vertical output ranges from 60 to 80% of the optimum, dropping to approximately 50% at latitudes within 20° of the equators. In all cases, the output loss can be easily offset with only a few percent additional cost associated with installing additional PV panels. Additionally, vertical systems collect less dust and require less cleaning. However, the complete system installation costs associated with vertical walls compared to rooftops are subject to specific circumstances and may still impede widespread adoption in some cases. It is expected that these costs will decrease through the implementation of innovations in this area. Examples of such innovations include PV-integrated glass windows and flexible PV panels. In conclusion, vertical wall-installed PV panels can indeed offer a viable alternative to rooftop installation in buildings with limited rooftop space. PubDate: 2024-07-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Lithium-ion batteries are receiving much attention for powering different electrical systems. During charging and discharging, heat generated may cause a fire. Maintaining a low surface temperature is crucial for the safety of the batteries. The uniform temperature distribution is critical to achieve. Flow through the channel has been used for the active cooling of batteries. Air, water and nanofluid are the fluids utilized in the dynamic cooling system. In the present study, we replace the channel configuration with a triply periodic minimal surfaces (TPMS) sheet made of AlSi10Mg with a thickness of 1 cm. The heat generated using 1C and 4C class of batteries is used. The numerical simulation using COMSOL software investigated different types of TPMS thermal performance. A solid gyroid network is the most suitable for such an application compared to a diamond network and I-graph and wrapped package graph (IWP) network for identical porosity. It is found that besides uniform temperature distribution compared to traditional channel configuration, there is an increase of the Nusselt number of 85% compared to the channel configuration. The performance evaluation criteria are increased by 40% compared to the channel configuration. The surface area of the TPMS plays a crucial role in heat extraction. Two parameters that confirmed the performance of the solid gyroid network are the performance evaluation criterion and the perforated ratio. Both indicated that the reliable gyroid network having a porosity of 0.5 is more effective in heat removal for this application. PubDate: 2024-07-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: The main objective of this work is to enhance the performance of the Photovoltaic water pumping system to cover the water requirement in rural areas. To do so, it is important to make sure that the PV array produces its maximum power at all times, which can be influenced by external condition (mainly the temperature and irradiation). Hence, we are employing the Adaptive Neuro-Fuzzy Inference System based MPPT in two ways. The ANFIS controller is considered more accurate and efficient as it uses an artificial neural network to learn from training data and generate fuzzy rules based on that data. Both approaches of ANFIS are used to control the duty cycle of the SEPIC converter, which connects the PV panel to the DC motor feeding the water pump. The system combining the PV panel, the SEPIC converter, the controller and the DC motor, is designed and simulated under MATLAB/Simulink. The performance of the proposed methods is tested under various meteorological conditions. PubDate: 2024-07-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: This study aims to examine the performance of a parabolic solar trough collector (PSTC) for the efficient use of green renewable solar energy. The study investigates the energy taken by water (ETW), receiver efficiency (RE), cumulative heat gain (CHG) by water in the tank, receiver terminal temperature difference (RTTD), and percentage of electric energy saving (PEES) at various mass flow rates (MFR) with and without coating of the receiver. The study found that the PSTC performed best with a coating (WC) of the receiver at a mass flow rate of 18.72 kg/h compared to the case without coating (WOC). At the mass flow rate of 18.72 kg/h, significant increases in ETW, RE, CHG of water in the tank, and RTTD were observed for the case WC compared to WOC, at 25.88, 25.87, 23.96, and 20.56%, respectively. Meanwhile, the maximum PEES of 66.8% was observed at the MFR of 18.72 kg/h for the case WC. There is a 23.45% reduction in the annual cost per kWh of energy used for the case with coating compared to the case without coating. In addition, a substantial amount of CO2, equivalent to 3,121.03 kg, can be offset by using the PSTC to heat water over its entire useful life. Pure titanium powder was used as the coating material. PubDate: 2024-06-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: The accuracy of hourly global horizontal irradiance forecasts provided by the ICON (Icosahedral Nonhydrostatic Weather and Climate Model), GFS (Global Forecast System), and MeteoFrance Global models for Moscow, Russia, over a 36-h forecast horizon, is analyzed. The study investigates the suitability of these freely available global Numerical Weather Prediction (NWP) models for predicting the output of PV power plants, considering the standards of the Russian wholesale electricity and capacity market. The study conducts a comparative assessment of the forecasts from the mentioned models. A notable conclusion drawn from the study is the superior performance of all the NWP models over the naive 36-h persistence forecast, as indicated by the root mean square error, mean absolute error and mean bias error metrics. The overall findings suggest a higher accuracy of hourly global horizontal irradiance forecasts from the ICON model compared to the others under the investigated conditions. PubDate: 2024-06-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: In recent years, ZnO nanostructure thin films have been used extensively by researchers in dye-sensitized solar cells (DSSCs) application due to its unique photovoltaic properties. The effects of the concentrations of Ni metal dopants on ZnO thin film DSSCs were investigated. ZnO–Ni nanocomposites were synthesized via sol-gel method. In this paper, the structural, morphological, and chemical properties of ZnO–Ni nanocomposite thin films were reported. Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), atomic force microcopy (AFM) and mapping analyses have found out that the crystallite and grain sizes of ZnO-Ni is increasing when Ni percentage is increased. The optical study from UV-Vis spectroscopy indicates that the band gap energy for ZnO–Ni photoanodes is in the range 3.5–3.7 eV. Energy dispersion X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) have identified the elements and chemical bonding that are related to ZnO and Ni. The photovoltaic performances were analyzed using photocurrent-voltage (J–V) measurement and electrochemical impedance spectroscopy (EIS). As the result, ZnO–Ni photoanode based DSSC with 60% of Ni concentration shows the highest power conversion efficiency (0.421%) with Jsc, Voc and FF of 1 mA/cm2, 0.95 V and 0.443. PubDate: 2024-06-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Currently, there is widespread interest in developing efficient technologies for harnessing solar energy, both in direct conversion of solar energy into electrical energy and in solar thermal power plants (STPPs). STPPs are sustainable sources of electricity due to the accumulation of heat in a heat carrier, which can be water, molten salt, or oil. The key to increasing the attractiveness of this technology lies in replacing the method of directly generating steam by heating water with solar radiation, with a receiver method using an intermediate heat transfer fluid. The technology of transferring heat obtained from solar radiation through liquid salt (a mixture of potassium nitrate and sodium nitrate, among others) imposes high demands on the pipes of this system that carry the heat transfer fluid, particularly regarding their corrosion resistance and service life. Using pipes made of ordinary steel grades with a special anti-corrosion coating applied to their inner surface can significantly reduce costs and increase the service life of the pipes, as well as the efficiency and reliability of STPPs. The study demonstrates that the method of comprehensive plasma vacuum arc treatment of the inner surface of metal pipes of various configurations, and the application of special coatings, ensures high anti-corrosion protection. For instance, applying a thin-layer coating of austenitic steel with a high chromium content (up to 28%) to samples of martensitic steel pipes resulted in 100% retention of the original sprayed material composition. Thus, the mechanical strength of the base material of the metal pipes in salt STPPs is combined with the high anti-corrosion properties of the applied material. Recommendations are provided for using plasma vacuum arc technology to ensure high operational properties of the circulating pipe systems in salt STPPs. PubDate: 2024-06-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Considering the global fuel crisis, countries have made it imperative to exploit solar energy correctly, which has emerged as the most significant renewable energy source in recent times. Utilizing solar energy to heat the water appropriately to reduce global energy consumption is a challenge most countries face. Research has, therefore, been done extensively to maximize the performance of solar water heating through various applications. Several methods were enumerated and applied in this review study to determine how to enhance the performance of solar water heaters. Eleven techniques for improvement were identified. They are as follows: using nanofluid with phase change material; improving the collector design; coating; lowering the inlet water temperature; switching to a combined system in place of the conventional gas heating system; utilizing a dual glass cover; utilizing the upstream delta wing; utilizing the evacuated tube collector; utilizing the heat exchanger; utilizing the photovoltaic glass unit; and integrating the solar water heater and tubular lighting device into one unit. According to the essential results, using an absorption cooling system with solar power resulted in 34% electricity savings. The absorption system was enhanced, and the COP was raised to 2.75 by implementing the solar water heating system. Solar heating systems combined with PCM achieved the highest efficiency rating of 65%. The dryer system’s CO2 emissions were lowered by about 34% when adding a solar collector. The solar water heater’s thermal efficiency was increased by 22.53% by a CuO/H2O nanofluid. PubDate: 2024-06-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: The accelerated transformation of the world’s energy system, associated with events observed over the past 10 years, such as the global energy crisis that began in 2021, the COVID-19 pandemic, and others, have influenced a noticeable change in the face of global energy, dictating the introduction of renewable energy sources at a rapid pace for a “post-crisis” recovery of the global economy. As in other countries of the world, the fourth energy transition in Uzbekistan is also accompanied in accordance with the Sustainable Development Goals. The state plans to install renewable energy sources with a capacity of 4300 MW in 2023, which ultimately contributes to the diversification of energy resources and will make it possible to assess the country’s energy security level, taking into account the share of newly introduced renewable energy capacities. However, if we take into account the peculiarity of the “instability” of renewable energy sources, the energy security of the state may remain under threat. The purpose of this work is to identify the most significant indicators of energy security in assessing its level for Uzbekistan, taking into account the geostrategic, political, technical, and technological features of the country’s energy system based on a detailed and critical review of existing global methodologies regarding the comparison of primary data from two or more samples. It has been revealed that the weight of the indicator “Ratio of primary energy production (extraction) from renewable energy sources to gross fuel and energy consumption” has a significantly comparable role with the indicators of the blocks “Block of diversification of suppliers and types of energy resources,” “Block of reliability of electricity supply,” and “Block of reproduction of the main fund of production (MFP)” due to the political course of Uzbekistan in recent years. Based on the selected indicators, a methodology for assessing the level of energy security of the Republic of Uzbekistan is proposed, which allows one to obtain a transparent picture of energy security in economic sectors. As a result of which it is possible to identify strengths and weaknesses in various areas and timely prevent expected negative results through energy scenarios with a stable and reliable indicator of electricity supply, contributing to an increase in the level of energy security of the country. PubDate: 2024-06-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: The solar drying method consists of removing gartially and non-bound water with a small impact on the chemical structure and compositions, thus reducing the mass and minimizing the risk of numerous transformations. Taraxacum officinale leaves are well-known in the fields of pharmacology, herbal medicine, and traditional soft drinks. Since it is a seasonal plant, plants from these regions have become an indispensable element after drying and storing. The objective of this paper is to determine both total and specific energy consumption of the hybrid solar convection dryer in drying Taraxacum officinale leaves. The paper investigates the energy analysis of the leaves of Taraxacum solar drying, which includes the investigation of the impact of the aerothermal parameters’ variations: 4 temperatures (50, 60, 70, and 80°C) and 2 drying airflows (150 and 300 m3 h–1) on the specific energy utilization in the drying process. Furthermore, this work studies the thermal efficiency as well as the energy efficiency of the solar dryer which gives room to maximize the performance of the dryer chamber. The results indicate minimal values of total energy consumption are achieved at higher temperatures and airflow rates. The findings reveal that lower total energy consumption is achieved at higher temperatures and airflow rates. Moreover, the study delves into thermal efficiency and energy efficiency, highlighting a thermal efficiency of approximately 5.58% at lower temperatures 50°C. PubDate: 2024-06-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Aims investigation study to predict the albedo number as a function of latitude and longitude coordinates of the Algeria area, which is situated in North Africa. The estimated range of latitude is between 18.5° and 37.7° whereas the longitude is between –8.5° and 10.5°. The study takes the database as the real data, which is considered comparable values as a reference of the confirmation. An ideal reflector is going to have an albedo of 1, whereas an object that has an albedo of 0 is going to absorb any radiation that strikes it. Albedo is a measure of how much solar radiation, or sunlight, a surface reflects. It can be stated as a percentage or a decimal number, where 0 represents complete absorption of all incoming light and 1 represents a perfect reflector. The prediction model is divided into two parts the first part gives two formulas g1 and g2 which depend on the longitude and latitude of the coordinates of the area, respectively, and then added together g1, and g2, and divided by 2 to take the albedo number. for the second part do the correction between the model and experimental data, which gives us some errors, in this case, create a new correlation of the errors estimate f1, and f2 and add in the old correlation. Finally, a new correlation is corrected and the results give a perfect approximation of the best way. PubDate: 2024-06-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Solar energy has emerged as a prominent contender in this arena, attracting significant attention across the globe. Governments worldwide have undertaken extensive efforts to encourage the adoption of renewable energy, increasing the usage of solar panels. Despite its benefits, the deployment of photovoltaic (PV) modules generates significant waste, thereby posing a major environmental challenge. This study explores several recycling techniques, including physical, thermal, and chemical methods, that could be employed to manage solar panel waste. An in-depth analysis of separation techniques presently employed and underdevelopment was studied and compared to determine the physical treatment necessary for the separation of glass and aluminium. Extraction of rare earth metals cadmium, copper and tellurium requires chemical treatments using organic and inorganic solvents along with thermal treatment at 500–600°C to remove the EVA polymer. Recovery of silicon wafers and rare metals through various metal extraction processes is further examined. Europe was concluded as a frontrunner in solar waste management policies after analysis of the governmental policies of developed and developing nations of the world. The circular economy model developed portrayed a systematic approach for the removal of different components of a solar panel and reintegration into the manufacturing process. The implementation of a robust circular economy for renewable energy systems is conditional upon the optimization of resource recovery while minimizing energy consumption and this serves as the governing framework of this review. PubDate: 2024-04-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: In the front surface of PV modules, the soiling and dust is a major issue, especially in areas with high soiling rates, frequent dust, limited water supplies, and significant solar energy potential and appears to have a significant influence in output power. This study proposes an approach to mitigate the soiling, dust and assess the PV module performance under IEC 60891 by using of based-brush and based-water cleaning methods (CBB and CBW), which can significantly increase power generation and reduce the cost of operation and maintenance. Moreover, the CBB and CBW cleaning types help to improve the performance of PV modules. The cleaning factor shows that the overall electrical output power is approximately 3.09%, with an average value of 1.61% in cleaning based-brush and 1.49% in cleaning-based water, the CBB improve the total output power with 52% and CBW with 58%. The cleaning process affects, \({{I}_{{{\text{sc}}}}}~\) positively by approximately 2.49 and 2.24%, and the maximum output current \({{I}_{{{\text{mpp}}}}}\) with an overall cleaning factor of approximately 3.58%, where the average cleaning factors for CBB and CBW were 1.9 and 1.68%, respectively. The CBB showed good performance and significantly reduced the thickness of the dust layer accumulated on the module surface and removed a large portion of soiling. Therefore, a regular wet or dry cleaning of PV modules surface is essentially needed and the combination between the two methods is important to attempt the minimum costs and maximum power. From a sustainability perspective, this work demonstrates that the CBB method can be significantly utilized to reduce soiling losses in PV modules without using water. The study shows that CBW is an effective way to remove the bird dropping, thin dust and improve the output power. PubDate: 2024-04-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Photo-supercapacitors (PSCs) are independent energy sources serving the cause of simultaneous photoelectric conversion and energy storage. Insights on the working of PSCs are inevitable to realize higher efficiencies in these integrated systems and so theoretical analyses are highly required. A theoretical study on PSC comprising a CdS/CdTe thin film solar cell with a supercapacitor is carried out. The device physics of the solar cell is characterized by Sah-Noyce-Shockley (SNS) theory and the Electrical Circuit Model is used to model the working of supercapacitor. The temporal evolution of the PSC charging is theoretically simulated by the differential equation of the integrated circuit, solved using numerical methods. The effect of solar cell factors on the PSC charging is studied. With the optimized solar cell parameters, the maximum value of Energy Conversion and Storage Efficiency (ECSEmax %) of about 8.8% can be achieved with the proposed PSC. PubDate: 2024-04-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: In the past three decades, photovoltaic power generation has emerged as a key player in the field of green electricity market. Conventional coal-based power generation, causing all kinds of adverse environmental impacts, is even established in the electricity market only based on its efficiency and matured technology advantage. Now, based on new technology and research, photovoltaic power generation is also enjoying the reliable and efficient technology advantage. By enhancing the efficiency of photovoltaic power generation, the economic gap (per unit energy cost) between conventional and renewable one can be mitigated, by generating more energy during available sunny-times. The efficiency of the photovoltaic cell decreases drastically with an increase in module temperature. The responsible wavelength of the spectrum of solar irradiance can be filtered with the help of a passive optical filter or an active (thermo-electrical) optical filter. In this article, a new model-based predictive controller (MPC) is proposed for controlling the active optical filter that optimizes the Photovoltaic electrical power output efficiency at every wavelength of solar irradiance. This proposed MPC controller is simulated in MATLAB-R2022b, with the real-world solar irradiance and ambient temperature available at NIT K solar energy lab. The results are further verified at the real-time OPAL-RT platform to ensure the viability of the proposed work at the hardware level. The MATLAB and OPAL-RT results show that the overall performance of the PV cell has been increased. PubDate: 2024-04-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Renewable energy is in very much demand in current time due to its many favorable environment effect. Solar energy is one of the frontline sources of renewable energy. Solar photovoltaic converts the solar light into electricity. The performance of the solar photovoltaic depends on various parameters and one of such parameters is shading behavior. Further, the shading pattern and the progress of the shading are also important for predicting the solar performance. The interconnections of solar cells also impact the performance of solar photovoltaic. Therefore, a 4 × 4 module with various interconnections such as series-parallel (SP), total cross tied (TCT), bridge-link (BL), honeycomb (HC) and triple tied (TT) are studied under the row and column wise shading pattern. Shading pattern on a 4 × 4 module is increased cell by cell in horizontal direction, both from left to right and right to left. In the similar fashion, the shading pattern is varied from top to bottom or vice-versa in vertical direction. This shading pattern progresses from first row to the last and first column to last column in a progressive fashion. The power-voltage and current-voltage characteristics of solar photovoltaic are investigated for the mentioned shading patterns using various reconfigurations. The power output is identical when all cells in a row or column are shaded. On the other hand, if only few cells are shaded on row or column then the power output with TCT connection is highest among all connections. Further, the power output is for complete column shading is much higher than complete row shading for all the connections. The theoretical simulated results can ensure better implementation of interconnection in hardware set-up based on the shading pattern. PubDate: 2024-04-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: Heliostats serve as essential light-collecting components within tower solar thermal power stations. These power stations are typically located in windy and sandy environments, the strong winds can lead to deflection, deformation, or even collapse of heliostats, significantly impacting the light-gathering efficiency of the entire power generation system and causing substantial economic losses. Therefore, understanding the influence of wind on heliostats and their surroundings is crucial for designing wind-resistant heliostat structures, optimizing their layout, and enhancing power generation efficiency. This research employs computational wind engineering (CWE) for the study of wind-related phenomena in heliostat arrays under varying spatial conditions. This research employs three mathematical models for inlet boundary conditions in wind engineering, distinct from empirical expressions. Corresponding user-defined function (UDF) programs simulate conditions consistent with wind tunnel tests. The analysis aids in determining entrance boundary conditions tailored to the geomorphological characteristics of heliostats, laying the foundation for subsequent 3D numerical wind tunnel construction and simulation. It calculates wind load coefficients under various spatial positions, determining the maximum force coefficients for each component and identifying optimal deflection positions under adverse wind conditions. Based on heliostat structure dimensions and radiation grid layouts, the research calculates radial and circumferential distances that ensure no mechanical collisions or shielding losses occur between adjacent heliostats. This information aids in determining optimal heliostat spacing. PubDate: 2024-04-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: This study introduces a novel methodology for the accurate characterization of photovoltaic (PV) devices that are using spectral distributions from various unfiltered light sources, including ASTM G173-03 solar irradiance, xenon arc lamp, metal halide lamp and tungsten halogen lamp within the 300–1300 nm wavelength range. By leveraging experimental values of external quantum efficiencies and open circuit voltages from nine distinct solar cell technologies, the authors calculated efficiencies with minimal deviation from the experimental benchmarks. The approach uniformly applies across all light sources, revealing a significant correlation between the power and spectrum of light sources that mitigates their spectral influence on solar cell output parameters. This work not only advances the understanding of light source effects on PV device performance but also proposes a correction methodology that significantly reduces evaluation errors, providing a pathway towards more accurate and cost-effective PV device testing and characterization. PubDate: 2024-04-01
Please help us test our new pre-print finding feature by giving the pre-print link a rating. A 5 star rating indicates the linked pre-print has the exact same content as the published article.
Abstract: The solar adsorption cooling (SAC) system driven by a flat-type solar collector was investigated in this study. The adsorber is heated by solar energy and contains activated carbon-methanol as a working pair. The modulation is based on the first law of thermodynamics to determine all forms of energy interactions at each phase of the thermodynamic cycle of the SAC system. Some assumptions are taken into consideration to develop the model. The Dubinin–Astakhov model was used to calculate the adsorbate mass in the adsorbent. Additionally, REFPROP-NIST (V 8.0, 2007) was used to determine the thermodynamic properties of the adsorbate. A numerical simulation program was developed in FORTRAN to solve the model using the Simpson method. The model is validated with published research. The results obtained from the simulation of the model were analyzed and presented to explain the effects of different operating conditions on the performance of the adsorption cycle. The system’s total heat input \({{Q}_{{{\text{in}}}}}\) is found to be 3377.35 kJ, while its total cold production \({{Q}_{{{\text{ev}}}}}\) is 1640.29 kJ, corresponding to a total daily ice produced of 3.65 kg. Furthermore, the system achieved a cycle \({\text{CO}}{{{\text{P}}}_{{{\text{th}}}}}\) of 0.4857. A large amount (61%) of the total heat input is used in the desorption process; about 10% is utilized by the adsorbate, the adsorbent uses 25%, and the adsorber’s metal cover uses the remaining 4%. Also, an analysis of the results indicates that the thermal performance coefficient ( \({\text{CO}}{{{\text{P}}}_{{{\text{th}}}}})\) decreases with increased ambient and condensation temperatures. Furthermore, an increase in the evaporation temperature leads to an increase in the thermal performance coefficient. PubDate: 2024-04-01
Hybrid journal (It can contain Open Access articles)
[2468 journals]
