A Review of Mathematical Models for Performance Analysis of Hybrid Solar Photovoltaic - Thermal (PV/T) Air Heating Systems

2013 ◽  
Vol 768 ◽  
pp. 29-39 ◽  
Author(s):  
P. Baskar ◽  
G. Edison
Keyword(s):  
Industrial Process ◽  
Electrical Energy ◽  
Solar Thermal ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Thermal Systems ◽  
Heating Systems ◽  
Photovoltaic Modules ◽  
Air Heating ◽  
Process Heating

In recent years, many researches are being carried out on the integration of solar thermal systems with solar photovoltaic modules in many countries for heat generation along with electricity generation. The electrical energy generated by the solar PV modules is utilized for the operation of fan. The hybrid solar photovoltaic - Thermal (PV/T) technology provides an opportunity to enhance the electrical and thermal performances. This paper deals with analysis of various parameters which affect the electrical and thermal performances of different types of hybrid solar photovoltaic - Thermal (PV/T) air heating systems. These systems deliver more useful energy per unit area of the heater than that of individual solar PV and solar thermal systems and can be used for preheating the air for many applications such as drying of agricultural products, space heating and industrial process heating. The performance comparisons among the various models reveal that the model III in which the air flows above and below the absorber plate is most suitable for converting the solar energy into high quality electrical energy and low quality heat energy.

scholarly journals Comparison of Different Solar Thermal Energy Collectors and Their Integration Possibilities in Architecture

2017 ◽  
Vol 2 (1) ◽  
pp. 36 ◽  
Author(s):  
Humam Kayali ◽  
Asst. Professor Dr. Halil Alibaba
Keyword(s):  
Flat Plate ◽  
Electrical Energy ◽  
Solar Panel ◽  
Solar Thermal ◽  
The Sun ◽  
Solar Panels ◽  
Solar Thermal Energy ◽  
Thermal Systems ◽  
Heating Systems ◽  
Electricity Grids

Solar energy is becoming an alternative for the limited fossil fuel resources. One of the simplest and most direct applications of this energy is the conversion of solar radiation into heat, which can be used in water heating systems. A commonly used solar collector is the flat-plate. A lot of research has been conducted in order to analyze the flat-plate operation and improve its efficiency. The solar panel can be used either as a stand-alone system or as a large solar system that is connected to the electricity grids. The earth receives 84 Terawatts of power and our world consumes about 12 Terawatts of power per day. We are trying to consume more energy from the sun using solar panel. In order to maximize the conversion from solar to electrical energy, the solar panels have to be positioned perpendicular to the sun. Thus the tracking of the sun’s location and positioning of the solar panel are important. The main goal of this article is explaining all the solar thermal systems available and the integration possibilities with comparisons for better usages and integration process into design.

scholarly journals Tracking of Maximum Power Point in Solar PV (SPV) Systems using Perturb & Observe (PO) and Incremental Conductance (IC) Method

2019 ◽  
Vol 8 (12) ◽  
pp. 613-618
Keyword(s):  
Electrical Energy ◽  
Maximum Power ◽  
Energy Utilization ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Maximum Power Point ◽  
Incremental Conductance ◽  
Tracking Time ◽  
Power Point ◽  
Number Of Publications

The solar energy being clean, green & commercially modest, have become one of the most prevalent choice amongst the renewable sources of electrical energy. Utilization of energy generated from Solar photovoltaic (SPV) system rest on the maximum extraction of the power generated. Ideal maximum power point (MPP) tracking (MPPT) is used to transfer 100% generated power from source and transfer it to load. In literature of recent years, a good number of publications found on SPV systems and MPPT. In this paper most popular MPPT techniquesPerturb & Observe (PO) and Incremental Conductance (IC) methods are simulated and implemented. The comparison is also presented on the ground of parameters like tracking time, tracking efficiency etc.

scholarly journals New Design of Solar Photovoltaic and Thermal Hybrid System for Performance Improvement of Solar Photovoltaic

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Ridwone Hossain ◽  
Al Jumlat Ahmed ◽  
Sheik Md Kazi Nazrul Islam ◽  
Nirupam Saha ◽  
Preetom Debnath ◽  
...  
Keyword(s):  
Hybrid Systems ◽  
Energy Conversion Efficiency ◽  
Open Circuit ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Thermal Systems ◽  
Energy Technologies ◽  
Pv Panel ◽  
Average Improvement ◽  
New Type

Solar photovoltaic (PV) and solar thermal systems are most widely used renewable energy technologies. Theoretical study indicates that the energy conversion efficiency of solar photovoltaic gets reduced about 0.3% when its temperature increases by 1°C. In this regard, solar PV and thermal (PVT) hybrid systems could be a solution to draw extra heat from the solar PV panel to improve its performance by reducing its temperature. Here, we have designed a new type of heat exchanger for solar PV and thermal (PVT) hybrid systems and have studied the performance of the system. The PVT system has been investigated in comparison with an identical solar PV panel at outdoor condition at Dhaka, Bangladesh. The experiments show that the average improvement of open circuit voltage (Voc) is 0.97 V and the highest improvement of Voc is 1.3 V. In addition, the overall improvement of output power of solar PV panel is 2.5 W.

scholarly journals Integration of solar thermal systems into existing district heating systems

2017 ◽  
Vol 116 ◽  
pp. 158-169 ◽  
Author(s):  
C. Winterscheid ◽  
S. Holler ◽  
J.-O. Dalenbäck
Keyword(s):  
District Heating ◽  
Solar Thermal ◽  
Thermal Systems ◽  
Heating Systems ◽  
District Heating Systems

Investigations of Different Liquid Based Spectrum Beam Splitters for Combined Solar Photovoltaic Thermal Systems

2016 ◽  
Vol 138 (2) ◽  
Author(s):  
S. S. Joshi ◽  
A. S. Dhoble ◽  
P. R. Jiwanapurkar
Keyword(s):  
Solar Spectrum ◽  
Coconut Oil ◽  
Transformer Oil ◽  
Electrical Performance ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Solar Simulator ◽  
Thermal Systems ◽  
Beam Splitters ◽  
Beam Split

In the spectrum beam split approach of combined solar photovoltaic thermal system (PVT), the complete solar spectrum is splitted. The unwanted part of the solar spectrum for photovoltaic (PV) applications is filtered out and is used separately as heat. In this work, some inexpensive, clear, and easily available selective fluids are identified which can be used as both volumetric heat absorbers and selective spectrum filters for C-Si-based PVT. The electrical performance of a C-Si solar PV cell using these fluid-based filters is analyzed using a solar simulator at 1 Sun, AM 1.5 G. To check the volumetric heat absorbing potential, the required thermophysical properties of these selected fluids are estimated using a solar radiation pyranometer and standard experiments. The study concludes that water, coconut oil, and hydrotreated silicone transformer oil are some of the potential beam splitters and heat absorbers suitable for C-Si based spectrum beam split PVT applications.

scholarly journals Design of Augmented Cooling System for Urban Solar PV System

2021 ◽  
Vol 335 ◽  
pp. 03002
Author(s):  
Chong Jia Joon ◽  
Kelvin Chew Wai Jin
Keyword(s):  
Cooling System ◽  
Electrical Energy ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Pv System ◽  
Pv Panel ◽  
Solar Pv System ◽  
Low Efficiency ◽  
Electrical Loads ◽  
Temperature Output

Solar photovoltaic (PV) panels have been widely used to convert the renewable energy from the sun to electrical energy to power electrical loads but suffers from relatively low efficiency between 15% to 22%. Typically, the panels have an average lifespan of 25 to 30 years but could degrade quicker due to the panel overheating. Beyond the optimum working temperature of 25°C, a drop of efficiency by 0.4 to 0.5% for every 1°C had been reported. For solar PV applications in urban regions, passive cooling is beneficial due to limited amount of space and lower energy consumption compared to active cooling. A solar PV system with augmented cooling was conducted at a balcony of a condominium from 10am until 2pm. The solar PV system consisted of an Arduino controller, solar panel module, temperature sensor and LCD monitor. Reusable cold and hot gel packs were attached to the bottom of the solar PV. Both setups of solar PV panel with and without the cooling system were placed at the balcony simultaneously for measurement of temperature, output voltage and current. From this research, the outcome of implementing a cooling system to the solar PV increases the efficiency of the energy conversion.

Heat Loss Characteristics of a Roof Integrated Solar Micro-Concentrating Collector

2011 ◽  
Author(s):  
Tanzeen Sultana ◽  
Graham L. Morrison ◽  
Siddarth Bhardwaj ◽  
Gary Rosengarten
Keyword(s):  
Heat Transfer ◽  
Heat Loss ◽  
Large Scale ◽  
Radiation Heat Transfer ◽  
Industrial Process ◽  
Hot Water ◽  
Solar Thermal ◽  
Convection Heat ◽  
Thermal Systems ◽  
Optical Efficiency

Concentrating solar thermal systems offer a promising method for large scale solar energy collection. It is feasible to use concentrating solar thermal systems for rooftop applications such as domestic hot water, industrial process heat and solar air conditioning for commercial, industrial and institutional buildings. This paper describes the thermal performance of a new low-cost solar thermal micro-concentrating collector (MCT), which uses linear Fresnel reflector technology and is designed to operate at temperatures up to 220°C. The modules of this collector system are approximately 3 meters long by 1 meter wide and 0.3 meters high. The objective of the study is to optimize the design to maximise the overall thermal efficiency. The absorber is contained in a sealed enclosure to minimise convective losses. The main heat losses are due to natural convection inside the enclosure and radiation heat transfer from the absorber tube. In this paper we present the results of a computational investigation of radiation and convection heat transfer in order to understand the heat loss mechanisms. A computational model for the prototype collector has been developed using ANSYS-CFX, a commercial computational fluid dynamics software package. Radiation and convection heat loss has been investigated as a function of absorber temperature. Preliminary ray trace simulation has been performed using SolTRACE and optical efficiency has been evaluated. Finally, the MCT collector efficiency is also evaluated.

scholarly journals Review of solar photovoltaic/thermal (PV/T) air collector

2019 ◽  
Vol 9 (1) ◽  
pp. 126 ◽  
Author(s):  
Ahmad Fudholi ◽  
Mariyam Fazleena Musthafa ◽  
Abrar Ridwan ◽  
Rado Yendra ◽  
Hartono Hartono ◽  
...  
Keyword(s):  
Electrical Energy ◽  
Photoelectric Effect ◽  
Solar Air Heater ◽  
Solar Photovoltaic ◽  
Solar Pv ◽  
Pv System ◽  
Collector System ◽  
Promising Area ◽  
Solar Pv System ◽  
Solar Thermal Collectors

<span lang="EN-US">Growing concern with regard to energy sources and their usage has consequently increased significance of photovoltaic thermal (PV/T) collectors. A PV/T air collector is a system which has a conventional PV system combined with a thermal collector system. The system is able to produce electrical energy directly converted from sunlight by using photoelectric effect. Meanwhile, it also extracts heat from the PV and warms the fluid (air flow) inside the collector. In this review, solar PV system and solar thermal collectors are presented. In addition, studies conducted on solar PV/T air collectors are reviewed. The development of PV/T air collectors is a very promising area of research. PV/T air collectors using in solar drying and solar air heater.</span>

scholarly journals Industrial and commercial opportunities to utilise concentrating solar thermal systems in South Africa

2011 ◽  
Vol 22 (4) ◽  
pp. 15-30 ◽  
Author(s):  
Alan Brent ◽  
Marthinus Pretorius
Keyword(s):  
South Africa ◽  
Power Systems ◽  
South African ◽  
Electrical Power ◽  
Industrial Process ◽  
Solar Thermal ◽  
Technological Systems ◽  
Thermal Systems ◽  
Technology Roadmap ◽  
International Trends

A solar energy technology roadmap has been developed for South Africa. The roadmap lists a number of technological systems that fulfil three requirements from a South African perspective. First, they have clearly been demonstrated or commercialised. Second, a local industry could be stimulated including the potential to export, with associate socio-economic growth; and the other requirements of government can be met in terms of improving energy security and access, and addressing climate change. Third, they have a medium to high R&D intensity, in terms of available capacity and associate resources needed to support the further development of the technological systems. Concentrated Solar Thermal systems feature prominently in the list of technologies. These systems can generate electrical power, then referred to as Concentrating Solar Power systems, typically in the 1 to 100 MW range for on- and off-grid applications. They can also simply produce heat, typically in the 100 to 1000ºC range, primarily for commercial and industrial process applications. This paper discusses the international trends and drivers for these systems to generate power and heat, and then focuses on the specific potential in the South African context. A number of barriers to realizing the potential are discussed and recommendations are made accordingly to stimulate the growth of this industry sector in South Africa.

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