scholarly journals Numerical Simulations of a PV Module with Phase Change Material (PV-PCM) under Variable Weather Conditions

2021 ◽  
Vol 39 (2) ◽  
pp. 643-652
Author(s):  
Stefano Aneli ◽  
Roberta Arena ◽  
Antonio Gagliano
Keyword(s):  
Phase Change ◽  
Numerical Simulations ◽  
Phase Change Materials ◽  
Weather Conditions ◽  
Ansys Fluent ◽  
Pv Panel ◽  
Pv Module ◽  
Pv Modules ◽  
Fluent Software ◽  
Variable Weather

The electrical efficiency of photovoltaic (PV) modules can be improved through the cooling of the PV. Among the passive cooling strategy, one of the most promising concerns the use of phase change materials (PCMs) to decrease the operative temperature of a PV panel. This paper investigates the performances of a conventional PV panel in which two organic PCMs are added (PV-PCM) to reduce the temperature rise of PV cells and consequently to increase the electrical performances. With this aim, unsteady numerical simulations have been carried with Ansys Fluent software using a two-dimensional simplified geometry for the PV modules with the PCM is incorporated (PV-PCM), as well as for the benchmark PV module. The numerical simulations have allowed evaluating the PV cell temperatures, the power production, as well the PCM thermal behavior. As regards this latter aspect the dynamic analysis has evidenced the need to extend the time of simulation at least for two days in such way to take into account of the degree of solidification achieved during the night by the PCM materials. PCM with low melting temperature cannot complete solidifying during the night and so the heat stored during the day will be lesser than the theoretical one. The results of this study pointed out that the PV-PCM units allow achieving higher performances in comparison with a conventional PV module, especially during the hottest months. An increase in the peak power of 10% and of 3.5% of the energy produced all year round is attained.

scholarly journals CFD Analysis of Phase Change Materials Integrated with Solar Photovoltaic Modules

2019 ◽  
Vol 9 (2S4) ◽  
pp. 523-527
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Heat Removal ◽  
Thermal Response ◽  
Weather Conditions ◽  
Ethylene Vinyl Acetate ◽  
Photovoltaic Cell ◽  
Rear Side ◽  
Pv System ◽  
Pv Panel

The electrical output decreases in the PV system due to the heat generation in photovoltaic (PV) cell. The part of PV heat formation can be removed through attachment of phase change materials (PCM) at rear side of the ethylene vinyl acetate (EVA). The paper explains the Temperature distribution in the PV modules and analysis was done with and without PCM in two different weather conditions. Then the PCM (Calcium chloride hexa-hydrate) is connected on the PV panel rear side to evaluate the different solar irradiance levels. In Literature it is observed that the heat removal of PCM capability is used to control the generation of heat of the PV system. Thus the current work is to investigate the effects of PCMs in photovoltaic cell which reduces its temperature and also the thermal response of PV-PCM system and various weather conditions are analysed.

scholarly journals Photovoltaic Cooling Utilizing Phase Change Materials

2020 ◽  
Vol 160 ◽  
pp. 02004
Author(s):  
Suhil Kiwan ◽  
Hisham Ahmad ◽  
Ammar Alkhalidi ◽  
Wahib O Wahib ◽  
Wael Al-Kouz
Keyword(s):  
Phase Change ◽  
Experimental Test ◽  
Phase Change Materials ◽  
Experimental Tests ◽  
Photovoltaic System ◽  
Cell Temperature ◽  
Average Cell ◽  
Solar Systems ◽  
Pv Panel ◽  
Change Material

A theoretical analysis based on mathematical formulations and experimental test to a photovoltaic system cooled by Phase Change Material (PCM) is carried out and documented. The PCM is attached to the back of the PV panel to control the temperature of cells in the PV panel. The experimental tests were done to solar systems with and without using PCM for comparison purposes. A PCM of paraffin graphite panels of thickness15 mm has covered the back of the panel. This layer was covered with an aluminum sheet fixed tightly to the panel frame. In the experimental test, it was found that when the average cell temperature exceeds the melting point temperature of the PCM, the efficiency of the system increases. However, when the cell temperature did not exceed the melting temperature of the PCM, the use of the PCM will affect negatively the system efficiency.

Simulation Research on Phase Change Materials Using in Floor Heating

2011 ◽  
Vol 211-212 ◽  
pp. 236-239
Author(s):  
Lin Qiu ◽  
Li Huang ◽  
Yue Zou
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Materials ◽  
Release Process ◽  
Simulation Research ◽  
Temperature Changes ◽  
Fluent Software ◽  
And Function ◽  
Change Material ◽  
Floor Heating

Analysis the action and function of phase change material (PCM) in building energy storage, and numerical simulation the heat storage and heat release process of heating floor filled PCM packed module by using the FLUENT software, discussion and analysis the relation of temperature distribution with energy storage and discharge time, the effects of PCM in transfer heat, stabilizing temperature changes rate and adjust floor surface temperature in energy storage floor heating are provided.

scholarly journals Performance Evaluation of a Solar PV/T Water Heater Integrated with Inorganic Salt Based Energy Storage Medium

2020 ◽  
Vol 23 (3) ◽  
pp. 213-220
Author(s):  
R Prakash ◽  
B Meenakshipriya ◽  
S Vijayan ◽  
R Kumaravelan
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Materials ◽  
Electrical Energy ◽  
Electrical Performance ◽  
Back Side ◽  
Solar Pv ◽  
Storage Medium ◽  
Pv Module ◽  
Mixture Phase

Thermal and Electrical performance of solar PV/T hybrid water heating system using salt mixture phase change materials in storage tank is analyzed in this study. Compare to all conventional type heaters, the solar PV/T hybrid module collector has ability to produces both electrical energy from PV module and utilizes incident solar energy to heat the water. The sheet and tube type absorber is used to heat up the tube which is attached at the back side of PV module and transfer the heat to flowing water and the electrical energy is tested by connecting the DC load on the PV terminals under glazed and unglazed modes respectively. To enhance the thermal performance, energy storage medium is used as phase change materials at good proportion in the tank. The thermo physical properties of PCM are analyzed by Differential Scanning Calorimetry. This experimental testing is conducted from 8.00 to 17.00 IST in various sunny days and results are compared for glazed and unglazed conditions. The results shows that the average water temperature easily reaches 38-45°C and the final temperature of water never dropped below 34°, the temperature of PCM is 45.6oC, which is 5oC higher than outlet. The amount of heat stored using PCM in tank is 16.86% greater than no-PCM in the tank for constant 0.01 kg/s mass flow rate. The daily average electrical efficiency is 6.4% under glazed mode and 8.8% under unglazed conditions.

scholarly journals Comparative study with practical validation of photovoltaic monocrystalline module for single and double diode models

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Salam J. Yaqoob ◽  
Ameer L. Saleh ◽  
Saad Motahhir ◽  
Ephraim B. Agyekum ◽  
Anand Nayyar ◽  
...  
Keyword(s):  
Weather Conditions ◽  
Electrical Energy ◽  
Variable Load ◽  
Simple Method ◽  
Simple Modification ◽  
Matlab Simulink ◽  
Pv Panel ◽  
Pv Module ◽  
Internal Parameters ◽  
Good Agreement

AbstractA photovoltaic (PV) module is an equipment that converts solar energy to electrical energy. A mathematical model should be presented to show the behavior of this device. The well-known single-diode and double-diode models are utilized to demonstrate the electrical behavior of the PV module. “Matlab/Simulink” is used to model and simulate the PV models because it is considered a major software for modeling, analyzing, and solving dynamic system real problems. In this work, a new modeling method based on the “Multiplexer and Functions blocks” in the "Matlab/Simulink Library" is presented. The mathematical analysis of single and double diodes is conducted on the basis of their equivalent circuits with simple modification. The corresponding equations are built in Matlab by using the proposed method. The unknown internal parameters of the PV panel circuit are extracted by using the PV array tool in Simulink, which is a simple method to obtain the PV parameters at certain weather conditions. Double-diode model results are compared with the single-diode model under various irradiances and temperatures to verify the performance and accuracy of the proposed method. The proposed method shows good agreement in terms of the I–V and P–V characteristics. A monocrystalline NST-120 W PV module is used to validate the proposed method. This module is connected to a variable load and tested for one summer day. The experimental voltage, current, and power are obtained under various irradiances and temperatures, and the I–V and P–V characteristics are obtained.

scholarly journals Performance Enhancement of Self-Cleaning Hydrophobic Nanocoated Photovoltaic Panels in a Dusty Environment

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6800
Author(s):  
Emran Aljdaeh ◽  
Innocent Kamwa ◽  
Waleed Hammad ◽  
Mohammed I. Abuashour ◽  
Tha’er Sweidan ◽  
...  
Keyword(s):  
Performance Enhancement ◽  
Hydrophobic Surface ◽  
Experimental Tests ◽  
Sio2 Nanoparticles ◽  
Dust Particles ◽  
Substantial Impact ◽  
Pv Panel ◽  
Pv Module ◽  
Pv Modules ◽  
Self Cleaning

The efficiency of a photovoltaic (PV) panels drops significantly in dusty environments. The variation in temperature could have a substantial impact on PV panel cells, which could further lead to high deterioration and eventually permanent damage to the PV material in the presence of dust. To resolve this issue, in this work a novel hydrophobic silicon dioxide (SiO2)-based nanoparticle coating is proposed for the PV panel, to shrink the surface stress developed between the water and the coated facet. Two identical PV modules were installed to conduct comparable experimental tests simultaneously. The first module is coated by the SiO2 nanoparticles, and the second is uncoated and used as a reference. To maintain coherency, the experiments are done in the same environmental conditions, cleaning the PV modules at regular intervals. Results reveal that the accumulated energy generated during this period of study was comprehensively enhanced. Moreover, the self-cleaning property of the hydrophobic surface of the coated panel allowed water droplets to slide smoothly down the PV module surface, carrying dust particles. Useful recommendations are made at the end to enhance the performance of PV panels in dusty environments.

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