Forced-circulation solar water heating system using heat pipe-flat plate collectors: Energy and exergy analysis

Energy ◽  
2019 ◽  
Vol 180 ◽  
pp. 429-443 ◽  
Author(s):  
A. Allouhi ◽  
M. Benzakour Amine ◽  
M.S. Buker ◽  
T. Kousksou ◽  
A. Jamil
Keyword(s):  
Flat Plate ◽  
Heat Pipe ◽  
Exergy Analysis ◽  
Heating System ◽  
Forced Circulation ◽  
Solar Water Heating ◽  
Solar Water ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Solar Water Heating System

scholarly journals Experimental Validation of a Forced-Circulation Solar Water Heating System Equipped with Flat-Plate Solar Collectors – Case Study

2020 ◽  
Vol 5 (5) ◽  
pp. 565-570
Author(s):  
Altin Maraj
Keyword(s):  
Flat Plate ◽  
Heating System ◽  
Solar Collectors ◽  
Water Heating ◽  
Forced Circulation ◽  
Solar Water Heating ◽  
Solar Water ◽  
Area Efficiency ◽  
Solar Water Heating System ◽  
Flat Plate Collector

This paper represents the comparison and the validation of results obtained from the simulation, towards the measurements performed in a forced-circulation solar water heating system equipped with flat-plate solar collectors. Polysun tool is used to model and to simulate the considered system during an annual time period. Mathematical models are used to calculate the required sensible heat, thermal yield from the flat-plate collector area, delivered energy to the thermal consumer, efficiency of the collector area, efficiency of the system, and the solar fraction. To validate the model, experimental data recorded in time intervals of 5-minutes in a trial installation are utilized. Statistical test errors (epsilon, MBE, MPE, RMSE, and R^2) are used to compare the values obtained from the simulation and measurements. Between them, a very good fit is noticed.

Improved Model for Calculating Instantaneous Efficiency of Flat-Plate Solar Thermal Collector

2018 ◽  
Vol 140 (6) ◽  
Author(s):  
Oussama Ibrahim ◽  
Farouk Fardoun ◽  
Rafic Younes ◽  
Mohamad Ibrahim
Keyword(s):  
Steady State ◽  
Flat Plate ◽  
Case Studies ◽  
Solar Collector ◽  
Heating System ◽  
Solar Water Heating ◽  
Solar Water ◽  
Flat Plate Solar Collector ◽  
Definition Of ◽  
Solar Water Heating System

The performance of a flat-plate solar collector is usually assessed by its efficiency. This efficiency is normally defined on a steady-state basis, which makes it difficult to correctly track the instantaneous performance of the collector in various case-studies. Accordingly, this paper proposes an improved definition of instantaneous efficiency of a flat-plate solar collector used as a part of a solar water heating system. Using a predeveloped model by the authors for such a system, the proposed efficiency-definition is examined and compared with the conventional one for specific case studies. The results show that the improved definition of efficiency records reasonable values, i.e., no over-range values are observed contrast to the case of conventional efficiency-definition. Furthermore, this suggested efficiency approximately coincides with the conventional one at a wide range of time, as long as the system is operating in the so-called trans-steady-state phase or when the system is off-operational provided that the instantaneous rate of heat stored in the heat transfer fluid (HTF) is less than or equal to zero. As a result, the improved efficiency-definition yields more realistic results in reflecting the performance of a flat-plate collector in an active solar water heating system and is recommended to be used.

Application Research of Solar Water Heating System in Severe Cold Region

2012 ◽  
Vol 170-173 ◽  
pp. 2499-2503
Author(s):  
Xin Chang ◽  
Jia Fu Xiao ◽  
Chun Yu Ran ◽  
Bo Jiao Yan
Keyword(s):  
Flat Plate ◽  
Heating System ◽  
Application Research ◽  
Cold Region ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water ◽  
Solar Water Heating System

It introduces solar water heating system briefly, states the feasibility and necessity of the application of this system in severe cold region, analyzes the advantages of flat plate solar water heating system and people’s misunderstandings and finally indicates the applicability and prospects of this system in severe cold region.

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