Experimental and numerical results from hybrid retrofitted photovoltaic panels

Rossi, C.; Tagliafico, Luca A.; Scarpa, Federico; Bianco, Vincenzo

doi:10.1016/j.enconman.2013.07.088

Cited by 26 publications

(12 citation statements)

References 28 publications

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“…Sustainability 2016, 8,22 18 of 24 high efficiency is mainly due to the cooling effect of the evaporation of the photovoltaic module. This enables the PV/T-SAHP system to be maintained at a low operating temperature even under high irradiation conditions, which can ensure the high photoelectric conversion efficiency.…”

Section: Test Results and Analysismentioning

confidence: 99%

“…Sustainability 2016, 8,22 4 of 24 refrigerating system operates in a stable but inefficient way due to too high superheat temperature; Point A on the curve that acts as the static line of the expansion valve should be the best matching time when evaporators' temperature is in a critical but stable condition with a maximum heat production. …”

Section: Matching Relations Between the Eev And The Evaporatormentioning

confidence: 99%

“…A model without any information about the refrigerant fluid properties of independent Carnot inverse cycle which applied both to a household refrigerator and to a DX-SAHP is considered to be quite effective [7]. On retrofitting water cooled solar hybrid panels, a cheap and "easy to implement" solution is to fix the thermal plate on the rear of the panel by means of wood ribs [8].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Influence of the Stability Factors of PV/T-SAHP on the Performance of the System

et al. 2015

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Abstract:The integrated photovoltaic/thermal collector (PV/T) with solar assisted heat pump (SAHP) often operates under an undesigned condition. Against the backdrop of heat pump system oscillation resulting from the mismatching between collectors area and compressor capacity, this work explores the dynamic performance of heat pump system at a fixed compressor frequency when the condensing water temperature and electronic expansion valve (EEV) opening are variable or invariable. We also consider why the system is unstable and propose the theory of SAHP system stability. Also, a preliminary performance analysis is made on SAHP system that is respectively influenced by an inverter compressor and EEV. The MSS(Minimum Stable Signal) line theory is proposed to account for system unstabilty in the research of the match between EEV and evaporators, that is to say, the critical problem of keep the system stability is to find out how evaporators superheat under the circumstance of specified loads and its corresponding EEV opening, in other words, to find the MSS line.

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Section: Test Results and Analysismentioning

confidence: 99%

Section: Matching Relations Between the Eev And The Evaporatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of the Influence of the Stability Factors of PV/T-SAHP on the Performance of the System

et al. 2015

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“…The main advantage of active cooling systems is a more efficient heat removal rate; for this reason, they are generally preferred to passive systems, in which a cooling fluid circulates without needing additional power. In this case, active cooling systems present an additional advantage related to the possibility of supplying an external thermal load, as in the case of the PV-T (Photovoltaic Thermal) or PV-SAHP (Photovoltaic Solar Assisted Heat Pump) types [16][17][18][19][20][21][22][23]. The drawback of the additional power supply requested by active cooling can be overcome by evaluating the optimum value of the flow rate of the cooling fluid when irradiance, ambient temperature, and fluid losses are known.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Numerical Study of a Photovoltaic System with Active Fluid Cooling by a Fully-Coupled 3D Thermal and Electric Model

et al. 2020

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The paper deals with the three-dimensional theoretical and numerical investigation of the electrical performance of a Photovoltaic System (PV) with active fluid cooling (PVFC) in order to increase its efficiency in converting solar radiation into electricity. The paper represents a refinement of a previous study by the authors in which a one-dimensional theoretical model was presented to evaluate the best compromise, in terms of fluid flow rate, of net power gain in a cooled PV system. The PV system includes 20 modules cooled by a fluid circulating on the bottom, the piping network, and the circulating pump. The fully coupled thermal and electrical model was developed in a three-dimensional geometry and the results were discussed with respect to the one-dimensional approximation and to experimental tests. Numerical simulations show that a competitive mechanism between the power gain due to the cell temperature reduction and the power consumption of the pump exists, and that a best compromise, in terms of fluid flow rate, can be found. The optimum flow rate can be automatically calculated by using a semi-analytical approach in which irradiance and ambient temperature of the site are known and the piping network losses are fully characterized.

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“…The use of PV panel is not the new trend but the use of PV with thermal collector gives the pre heating of the water [11][12][13][14][15][16][17]. The PVT system is also known as the hybrid system and gives the better enhancement to the temperature of the fluid [13,14,17]. [11,18].…”

Section: ) Integrated Collector-storage Solar Water Heater (Icsswh) mentioning

confidence: 99%

A Review on Revolution of Flat Plate Collector for Solar Water Heater

Patil¹

2018

IJRASET

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Energy is the significant need of the world either for nutrition or for development of the society. The power bank of the earth is the sun, which has tremendous amount of energy in it and will never exhaust. The conversion of solar energy to thermal energy is the function of collector. Flat plate collector (FPC) are cost effective and more convenience in all collectors. The paper reveals the different design of the flat collectors used to enhance the efficiency of the collector. Effect of using phase change material, nanofluids, heat pipe, different geometry of the tubes and absorber discussed. This review deals with the suggestion for the research work in flat plate collector. Keywords: FPC Design; Solar Collectors; different collectors for SWH; Design of SWH I. INTRODUCTIONEnergy is the most important and a key factor in day-to-day life. The keen interest is towards the solar energy which is a pure green energy and available in plenty. The energy of Sun used to heat the water, which is the great need of each human being for various purposes. During review it is found that the various solar water heating system were made by many researchers with relatively high efficiency and reasonable cost, but the system does not meet the requirement of other countries due to climatic conditions and many other reasons. Today environment is the major issue and the awareness regarding the environment is increasing this promote solar and renewable energy system in world and decreases the dependencies' on fossil fuels. The solar water heating system consist of riser tubes, absorbers a dark surface plate, insulation and glazed glass. The system when exposed to the sun, the absorber absorbs the solar radiation and transfers a part of it to the fluid flowing over/under it [3][4][5][6][7]. The more is the collector area more will be the energy, but the law of thermodynamics state that no machine can gives 100% output therefore we even cannot get the 100% percent conversion. Now, the design goals were to have the collector that can convert the maximum solar energy to heat energy with a lesser amount of losses; and cost. The objective for the review of solar water heating system is to get the various designs available and invented by researchers at one place to get the idea of possible development in it with the future of design in Solar Water Heater (SWH). The review is limited to the flat plate collector and other similar to it. There are two broad categories of SWH (passive and active), each of them operating in either direct or indirect mode. The active systems give 35%-80% efficiency higher than those of the passive systems [3].

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Experimental and numerical results from hybrid retrofitted photovoltaic panels

Cited by 26 publications

References 28 publications

Analysis of the Influence of the Stability Factors of PV/T-SAHP on the Performance of the System

Analysis of the Influence of the Stability Factors of PV/T-SAHP on the Performance of the System

Theoretical and Numerical Study of a Photovoltaic System with Active Fluid Cooling by a Fully-Coupled 3D Thermal and Electric Model

A Review on Revolution of Flat Plate Collector for Solar Water Heater

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