Optimizing flat plate solar collector geometry for a solar water heating system

2016 ◽  
Author(s):  
A. Elhabishi ◽  
J. Gryzagoridis
Keyword(s):  
Flat Plate ◽  
Solar Collector ◽  
Heating System ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water ◽  
Flat Plate Solar Collector ◽  
Solar Water Heating System

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.

Analysis of Thermal Performance of Solar Collector in Solar Water Heating System

2014 ◽  
Vol 1055 ◽  
pp. 193-198 ◽  
Author(s):  
Jing Zhao ◽  
Zhi Ping Wang ◽  
Ke Zhen Wang ◽  
Xin Lu
Keyword(s):  
Solar Collector ◽  
Heating System ◽  
Heat Energy ◽  
Water Heating ◽  
Flow Rates ◽  
Solar Water Heating ◽  
Solar Water ◽  
Calculation Results ◽  
Solar Water Heating System ◽  
Simplified Formula

The daily collected heat energy of solar collector in solar water heating system is calculated by the modeling of solar collector and stratified tank, and the result is verified by experiments. Through analysis of the calculation results, the simplified formula for calculating the daily collected heat energy is given. Using this simplified formula, the daily collected heat energy under different flow rates is calculated. The result shows that the daily collected heat energy of solar collector running in solar water heating system tends to stable when the flow rate above 0.005kg/(m2.s).

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