Showing papers on "Photovoltaic thermal hybrid solar collector published in 2012"
TL;DR: In this paper, a high-efficiency polymer solar cell whose device architecture is compatible with a large-scale roll-to-roll process is demonstrated, achieving power conversion efficiency of around 7.4%.
Abstract: Researchers demonstrate a high-efficiency polymer solar cell whose device architecture is compatible with a large-scale roll-to-roll process. Enhanced charge collection in the inverted polymer solar cell design and certified power conversion efficiencies of around 7.4% are reported.
908 citations
TL;DR: The dye-sensitized solar cells (DSSCs) as mentioned in this paper are the most efficient and easily implemented technology for photovoltaic devices, and they have low module cost and easy fabrication.
Abstract: The prosperity of human society largely relies on safe energy supply, and fossil fuel has been serving as the most reliable energy source. However, as a non-renewable energy source, the exhaustion of fossil fuel is inevitable and imminent in this century. To address this problem, renewable energy especially solar energy has attracted much attention, because it directly converts solar energy into electrical power leaving no environment affect. In the past, various photovoltaic devices like organic, inorganic, and hybrid solar cells were fabricated in succession. In spite of high conversion rate of silicon based solar cells, the high module cost and complicated production process restricted their application solely to astronautic and aeronautic technology. For domestic and other commercial applications, research has been focused on organic solar cells for their inherent low module cost and easy fabrication. In addition, organic solar cells have their lightweight and flexibility advantage over conventional silicon-based crystalline solar cells. Among all the organic solar cells, dye-sensitized solar cells (DSSCs) are the most efficient and easily implemented technology. Here, this study examines the working principle, present development and future prospectus for this novel technology.
762 citations
TL;DR: In this paper, a hybrid photovoltaic/thermal (PV/T) solar system was designed, fabricated and experimentally investigated in this work, where a parallel array of ducts with inlet/outlet manifold designed for uniform airflow distribution was attached to the back of the PV panel.
622 citations
TL;DR: In this article, the underlying principles of concentrating solar radiation and the latest technological advances and future prospects of solar thermal power and thermochemical fuel production are reviewed and discussed. But the authors focus on concentrating solar energy provides a virtually unlimited source of clean, non-polluting, high-temperature heat.
Abstract: Concentrated solar energy provides a virtually unlimited source of clean, non-polluting, high-temperature heat. This article reviews the underlying principles of concentrating solar radiation and describes the latest technological advances and future prospects of solar thermal power and thermochemical fuel production.
570 citations
TL;DR: In this paper, the impact of dust accumulation, humidity level and air velocity on the performance of photovoltaic cells was investigated and the authors concluded that in order to have a profound insight of solar cell design, the effect of these factors should be taken into consideration in parallel.
Abstract: The environmental and economical merits of converting solar energy into electricity via photovoltaic cells have caused an ever increasing interest among developed and developing countries to allocate more budget on photovoltaic systems in order to boost up their efficiency in recent years. Besides the material and design parameters, there are several omnipresent factors such as dust, humidity and air velocity that can influence the PV cell's performance. There have been a handful of studies conducted on the effect of various influential parameters on the efficiency and performance of photovoltaic cells; however none has taken all these three parameters into account simultaneously. In this study the impact of dust accumulation, humidity level and the air velocity will be elaborated separately and finally the impact of each on the other will be clarified. It is shown that each of these three factors affect the other two and it is concluded that in order to have a profound insight of solar cell design, the effect of these factors should be taken into consideration in parallel.
519 citations
TL;DR: In this article, the authors present an overview on the research and development and application aspects for the hybrid photovoltaic/thermal (PV/T) collector systems.
Abstract: This article presents an overview on the research and development and application aspects for the hybrid photovoltaic/thermal (PV/T) collector systems. A major research and development work on the photovoltaic/thermal (PVT) hybrid technology has been done since last 30 years. Different types of solar thermal collector and new materials for PV cells have been developed for efficient solar energy utilization. The solar energy conversion into electricity and heat with a single device (called hybrid photovoltaic thermal (PV/T) collector) is a good advancement for future energy demand. This review presents the trend of research and development of technological advancement in photovoltaic thermal (PV/T) solar collectors and its useful applications like as solar heating, water desalination, solar greenhouse, solar still, photovoltaic–thermal solar heat pump/air-conditioning system, building integrated photovoltaic/thermal (BIPVT) and solar power co-generation.
377 citations
TL;DR: In this article, a thermal energy storage system, consisting of a packed bed of rocks as storing material and air as high-temperature heat transfer fluid, is analyzed for concentrated solar power (CSP) applications.
304 citations
TL;DR: The use of solar energy in recent years had reached a remarkable edge as mentioned in this paper and continuous research for an alternative power source due to the perceived scarcity of fuel fossils is its driving force.
Abstract: The use of solar energy in recent years had reached a remarkable edge. The continuous research for an alternative power source due to the perceived scarcity of fuel fossils is its driving force. It had become even more popular as the cost of fossil fuel continues to rise. Of all the renewable sources of energy available, solar energy is the most abundant one and is available in both direct as well as indirect forms. Solar energy applications were divided mainly into two categories: the first is the direct conversion to electricity using solar cells (electrical applications). The second is the thermal applications. The latter include solar heating, solar cooling, solar drying, solar cooking, solar ponds, solar distillation, solar furnaces, solar-thermal power generation, solar water heating, solar air heating, etc. Detailed description, fundamentals and previous work performed on solar dryers and solar air heaters, as the vital element for the indirect and mixed modes of solar dryers, were presented in the present review paper.
234 citations
TL;DR: In this article, a thermal energy storage (TES) unit is used in a parabolic trough concentrated solar power (CSP) system to control power output in addition to collector outlet temperature.
212 citations
TL;DR: In this article, a nanofluid-based concentrating parabolic solar collector (NCPSC) has been theoretically modeled, and the governing equations have been numerically solved using finite difference technique.
Abstract: Dispersing trace amounts of nanoparticles into the base-fluid has significant impact on the optical as well as thermo-physical properties of the base-fluid. This characteristic can be utilized in effectively capturing as well as transporting the solar radiant energy. Enhancement of the solar irradiance absorption capacity of the base fluid scales up the heat transfer rate resulting in higher & more efficient heat transfer. This paper attempts to introduce the idea of harvesting the solar radiant energy through usage of nanofluid-based concentrating parabolic solar collectors. In order to theoretically analyze the nanofluid-based concentrating parabolic solar collector (NCPSC) it has been mathematically modeled, and the governing equations have been numerically solved using finite difference technique. The results of the model were compared with the experimental results of conventional concentrating parabolic solar collectors under similar conditions. It was observed that while maintaining the same external conditions (such as ambient/inlet temperatures, wind speed, solar insolation, flow rate, concentration ratio etc.) the NCPSC has about 5–10% higher efficiency as compared to the conventional parabolic solar collector. Furthermore, some parametric studies were carried out which reflected the effect of various parameters such as solar insolation, incident angle, convective heat transfer coefficient etc. on the performance indicators such as thermal efficiency etc.Copyright © 2012 by ASME
TL;DR: In this paper, the authors investigated the possibility of using thermoelectric generators in solar hybrid systems and found that the TEG's efficiency has almost linear dependence on the temperature difference Δ T between its plates, reaching 4% at Δ T ǫ = 155 Ã − Ã Ã (hot plate at 200 Ã )°C with 3 W of power generated over the matched load.
TL;DR: In this paper, the authors compare the initial costs of both thermally and electrically driven cooling systems, including projections about future costs of solar electric and solar thermal systems, and include estimates of the environmental impacts of the key components in each solar cooling system presented.
TL;DR: In this paper, a comprehensive literature review has been carried out on exergy analysis of various solar energy systems, including photovoltaic, solar heating devices, solar water desalination system, solar air conditioning and refrigerators, solar drying process and solar power generation.
Abstract: Solar energy is a clean, abundant and easily available renewable energy. Usage of solar energy in different kinds of systems provides scope for several studies on exergy analysis. In the present work, a comprehensive literature review has been carried out on exergy analysis of various solar energy systems. The systems considered under study are solar photovoltaic, solar heating devices, solar water desalination system, solar air conditioning and refrigerators, solar drying process and solar power generation. The summary of exergy analysis and exergetic efficiencies is presented along with the exergy destruction sources.
TL;DR: In this article, the authors discuss the advantages of using solar energy over other forms of energy to produce hydrogen and examine the latest research and development progress of various solar-to-hydrogen production technologies based on thermal, electrical and photon energy.
TL;DR: In this paper, a heat pipe photovoltaic/thermal (PV/T) system that could simultaneously supply electrical and thermal energy was proposed, which can be used in cold regions without becoming frozen.
TL;DR: In this article, an experimental, unglazed, single pass, open loop photovoltaic thermal (PVT) air system in Sydney was designed with the aim of maximising the electrical and thermal energy outputs.
23 Feb 2012
TL;DR: In this paper, solar power generation systems including a working fluid circuit providing for the flow of supercritical carbon dioxide (S-CO2) therein are described. But the authors do not specify the type of working fluid.
Abstract: Methods and solar power generation systems including a working fluid circuit providing for the flow of supercritical carbon dioxide (S-CO2) therein. The methods and systems may also include a solar energy receiver in thermal communication with the working fluid circuit providing for solar heating of the S-CO2 working fluid; a power turbine in fluid communication with the S-CO2; a generator mechanically coupled to the power turbine; a compressor turbine in fluid communication with the S-CO2 and a compressor mechanically coupled to the compressor turbine such that the compressor is configured to compress the S-CO2 within a portion of the working fluid circuit. The methods and systems may optionally include a secondary power block in thermal communication with a primary power block. The methods and systems may optionally include thermal energy storage. Various embodiments may be implemented in a modular fashion and located on or within a solar energy tower.
TL;DR: In this article, a novel application for a hybrid photovoltaic/thermal (PVT) collector, which produces electricity and hot water simultaneously, is investigated, where the hybrid collector is used to drive a hybrid air conditioner that separates the sensible and latent loads.
TL;DR: A short overview about solar refrigeration systems is explained with a basic analysis of thermodynamic, and new developments of open cooling and closed cooling cycles are presented and some of the new technologies are demonstrated in more detail as mentioned in this paper.
Abstract: This paper describes heat driven cooling technologies in combination with solar thermal energy. A short overview about solar refrigeration systems is explained with a basic analysis of thermodynamic. Furthermore, new developments of open (desiccant cooling) and closed (absorption and adsorption) cooling cycles are presented and some of the new technologies are demonstrated in more detail. Additionally, recent installations of solar-thermal of air conditioning systems are described as examples with their working performance and system description. This report also includes small scale solar thermal absorption cooling system design in the following pages. The general purpose of the design is to understand how efficiently solar cooling system generates cooling, and to reduce the footprint of systems for integration with existing and future domestic buildings.
TL;DR: In this article, the authors compared different solar field technologies, in terms of both performance at design conditions and annual energy production; an in-house code, PATTO, was used to perform energy balances.
TL;DR: In this article, an experimental study of a small-scale Trombe composite solar wall is presented, where the phase change material was inserted into the wall in the form of a brick-shaped package.
TL;DR: In this paper, the authors developed a thermal model to simulate the thermal performance of PV modules with and without cooling, which was sequentially coupled with a radiation model and an electrical model to calculate the electrical performance of the PV panels.
TL;DR: In this article, the results of the simulation in terms of efficiencies, heat and electricity production and the main characteristics of the system (i.e. heat exchanger surface, solar collector area) are presented and discussed.
TL;DR: In this paper, a proprietary transient simulation program has been developed and validated with a detailed measurement campaign in an experimental facility to obtain the design and dimensioning criteria of DHW solar plants under daily transient conditions throughout a year and more specifically the size of the storage tank for a multi storey apartment building.
TL;DR: In this paper, a hybrid tandem photovoltaic (HTPV) architecture is proposed to achieve power conversion efficiencies above 20% in order to keep installation costs down.
Abstract: It is estimated that for photovoltaics to reach grid parity around the planet, they must be made with costs under $0.50 per Wp and must also achieve power conversion efficiencies above 20% in order to keep installation costs down. In this work we explore a novel solar cell architecture, a hybrid tandem photovoltaic (HTPV), and show that it is capable of meeting these targets. HTPV is composed of an inexpensive and low temperature processed solar cell, such as an organic or dye-sensitized solar cell, that can be printed on top of one of a variety of more traditional inorganic solar cells. Our modeling shows that an organic solar cell may be added on top of a commercial CIGS cell to improve its efficiency from 15.1% to 21.4%, thereby reducing the cost of the modules by ∼15% to 20% and the cost of installation by up to 30%. This suggests that HTPV is a promising option for producing solar power that matches the cost of existing grid energy.
TL;DR: In this paper, an experimental and analytical study on incorporation of thermoelectric modules with glass evacuated-tube heat-pipe solar collectors is presented, which can be used for combined water heating and electricity generation.
TL;DR: In this paper, a solar heating and cooling (SHC) system with photovoltaic/thermal (PVT) collectors operating up to 80°C is considered for a university building located in Naples (Italy).
TL;DR: In this paper, the authors presented a detailed simulation model of the HP-PV/T system and analyzed the annual electrical and thermal behavior of the two systems used in three typical climate areas of China, namely, Hong Kong, Lhasa, and Beijing.
TL;DR: In this paper, a low temperature desalination process capable of producing 100 L/d freshwater was designed to utilize solar energy harvested from flat plate solar collectors, and a thermal energy storage system was incorporated to run the process round the clock.