Thermal Analysis of Some Flat-Plate Solar Collector Designs for Improving Performance

1979 ◽  
Vol 3 (1) ◽  
pp. 8-15 ◽  
Author(s):  
D. L. Siebers ◽  
R. Viskanta
Keyword(s):  
Thermal Analysis ◽  
Flat Plate ◽  
Solar Collector ◽  
Flat Plate Solar Collector

scholarly journals Thermal Analysis of Flat Plate Solar Collector Using Different Nanofluids and Nanoparticles Percentages

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 52053-52066
Author(s):  
A. A. Hawwash ◽  
Maqusood Ahamed ◽  
S. A. Nada ◽  
Ali Radwan ◽  
Ali K. Abdel-Rahman
Keyword(s):  
Thermal Analysis ◽  
Flat Plate ◽  
Solar Collector ◽  
Flat Plate Solar Collector

THERMAL ANALYSIS OF A TUBELESS FLAT-PLATE SOLAR COLLECTOR

2018 ◽  
Author(s):  
Felipe Boragina da silva ◽  
Guilherme Viana ◽  
Julia Maria Massareli Costa ◽  
Vinicius Cruz ◽  
Ana Beatriz Valentin ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Flat Plate ◽  
Solar Collector ◽  
Flat Plate Solar Collector

Optical and thermal analysis of all-glass flat plate solar collector for domestic applications

2017 ◽  
Author(s):  
Raquel Miguez de Carvalho ◽  
Mavd de Paula Ribeiro Teles ◽  
F. A. M. Lino ◽  
Kamal Abdel Radi Ismail
Keyword(s):  
Thermal Analysis ◽  
Flat Plate ◽  
Solar Collector ◽  
Flat Plate Solar Collector

State Space Model for Thermal Analysis of Integrated Structure of Flat Plate Solar Collector and Building Envelope

2015 ◽  
Vol 137 (6) ◽  
Author(s):  
Guoqing Yu ◽  
Jirui Zhou ◽  
Yongqiang Tang
Keyword(s):  
Heat Transfer ◽  
Thermal Analysis ◽  
Flat Plate ◽  
State Space ◽  
Solar Collector ◽  
State Space Model ◽  
Building Envelope ◽  
Space Model ◽  
Fluent Simulation ◽  
Flat Plate Solar Collector

Active types of integration of flat plate solar collectors and building envelopes are studied in this paper. The integrated structure of flat plate solar collector and building envelope includes glass cover, absorber plate, tubes, back insulation, and building envelope (we will call it integrated structure later in this paper). With the solar collector integrated with building, the boundary conditions of heat transfer both for the solar collector and the building envelope are changed significantly, and the thermal performance of solar collection and building heat transfer characteristics influences each other. The state space model for thermal analysis of the integrated structure is proposed in this paper, and method for solving this state space model is provided. Moreover, thermal analysis for a particular integrated structure was conducted both by state space model and fluent simulation, then the results were compared and agree well. The state space model has great advantages in time-spending over fluent simulation and it can be used for long-term (several months or a whole year) simulation of the integrated structure. Comparison were made between the integrated structure, detached solar collector and detached single wall based on results calculated by state space method. It shows that (1) integration has little impact on the thermal efficiency of solar collection and the useful heat gain of the integrated structure are nearly the same as that for the single detached solar collector under the same ambient conditions; (2) integration has significant impact on the heat flux across the wall, and the heat flux of the integrated structure is much less than the detached single wall.

Reduced Model for a Thermal Analysis of a Flat Plate Solar Collector With Thermal Energy Storage Using Phase Change Material (PCM)

2015 ◽  
Author(s):  
Mauricio Carmona ◽  
Gabriel Caicedo ◽  
Humberto Gómez Vega ◽  
Antonio Bula
Keyword(s):  
Thermal Analysis ◽  
Energy Storage ◽  
Phase Change ◽  
Flat Plate ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Solar Collector ◽  
Sensible Heat ◽  
Simplified Models ◽  
Flat Plate Solar Collector

In conventional solar water heaters, the thermal energy storage is accomplished by increasing the sensible heat in a fluid. Therefore, the accumulation capacity of sensible heat is proportional to the mass storage and the increase of temperature, so that an increase in the requirements involves a bigger tank volume. Phase change materials (PCM) stored energy at constant temperature (or at least in a fairly narrow range of temperature) while the phase change is produced, they are presented as an alternative to compensate the solar heat supply periods and the thermal demand with a better heat accumulation per volume unit. In contrast, these systems require more complicated thermal analysis and designs than the traditional systems by sensible heat with a single phase. The selection of PCM, its content and location on the device will have a determining effect on the overall performance of the solar collector. This implies that the heat exchanger must be designed for each specific application. Currently, there are no commercial devices for heating water by solar energy using thermal accumulation with PCM. However, preliminary studies in lab scale have shown significant increases in efficiencies and supply capacity. Several authors have been performed experimental and numerical studies in solar collectors including PCM technology, but, due to the complexity of the phenomena and the high consumptions of resources for both approaches, it has not been possible to evaluate different configurations that lead to optimized designs for selection, location and amount of PCM. This fact shows the need to develop simplified models that consider the main physical phenomena in the operation, in order to support the experimental and numerical techniques to determine the comprehensive thermal behavior. This kind of models can be used to estimate the performance for different configurations and boundary conditions in a fast way, to make possible in a posterior stage a detailed evaluation with numerical analysis or an experimental technique. In this paper, a simplified comprehensive model for assessing thermal performance of a flat-plate solar collector with PCM is presented with incorporation of specialized semi-empirical correlations. The model takes into account the main thermodynamic and heat transfer processes in the device, including the internal and external convection effects, conduction, solar radiation analysis, radiation, losses and interactions between surfaces, material solid-liquid phase change and conjugated problems in gas-liquid-solid zones. Due to the numerous existing design alternatives, consideration of an excessive number of options in the final design can lead to long development times and process inefficiencies. Therefore, a methodology of design that includes fast calculations of the main thermal parameters is highly regarded, since this can reduce the number of study cases and thus obtain optimal configurations from the simplified models. The performance of the reduced model, including a sensibility analysis of several input data, is compared qualitatively with results obtained in a traditional collector for a typical cycle available in bibliography. Integrated simplified models are developed to perform a coarse preliminary design of flat solar collectors with incorporation of PCM technology, and thus serve as a pre-evaluator of the different configurations.

Modeling and Analysis of an All-Plastic Flat-Plate Solar Collector

1982 ◽  
Vol 104 (4) ◽  
pp. 333-339 ◽  
Author(s):  
L. D. Russell ◽  
H. M. Guven
Keyword(s):  
Thermal Analysis ◽  
Mathematical Models ◽  
Flat Plate ◽  
Mass Production ◽  
Solar Collector ◽  
Low Cost ◽  
Cover Plate ◽  
Modeling And Analysis ◽  
Nonlinear Radiation ◽  
Flat Plate Solar Collector

The concept of an all-plastic liquid flat-plate solar collector was studied. Such a collector eliminates the need for coatings, metals, and all other materials except plastics. The concept appears to offer possibilities for the mass production of a low-cost, lightweight solar collector which is reasonably efficient. Material considerations for the concept are discussed, and thermal analysis is presented. Mathematical models were developed for study of this concept. Convection and nonlinear radiation between the covers was computed in all of the models. In addition absorptance and conduction in the cover(s) and the fluid cover plate were studied in order to determine their effects on the panel performance. A model panel was fabricated, and computer results were compared with test data for the efficiency of the panel.

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