Performance of copper oxide/distilled water nanofluid in evacuated tube solar collector (ETSC) water heater with internal coil under thermosyphon system circulations

2017 ◽  
Vol 121 ◽  
pp. 520-536 ◽  
Author(s):  
Javad Ghaderian ◽  
Nor Azwadi Che Sidik ◽  
Alibakhsh Kasaeian ◽  
Sepideh Ghaderian ◽  
Amir Okhovat ◽  
...  
Keyword(s):  
Copper Oxide ◽  
Solar Collector ◽  
Distilled Water ◽  
Water Heater ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube

scholarly journals A Study on Thermal Performance of a Novel All-Glass Evacuated Tube Solar Collector Manifold Header with an Inserted Tube

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Jichun Yang ◽  
Qingyang Jiang ◽  
Jingxin Hou ◽  
Chenglong Luo
Keyword(s):  
Solar Collector ◽  
Transfer Model ◽  
Water Tank ◽  
The Novel ◽  
Water Heater ◽  
Average Temperature ◽  
Evacuated Tube Collector ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube ◽  
The Relationship

A novel all-glass evacuated tube collector manifold header with an inserted tube is proposed in this paper which makes water in all-glass evacuated solar collector tube be forced circulated to improve the performance of solar collector. And a dynamic numerical model was presented for the novel all-glass evacuated tube collector manifold header water heater system. Also, a test rig was built for model validation and comparison with traditional all-glass evacuated tube collector. The experiment results show that the efficiency of solar water heater with a novel collector manifold header is higher than traditional all-glass evacuated tube collector by about 5% and the heat transfer model of water heater system is valid. Based on the model, the relationship between the average temperature of water tank and inserted tube diameter (water mass flow) has been studied. The results show that the optimized diameter of inserted tube is 32 mm for the inner glass with the diameter of 47 mm and the water flow mass should be less than 1.6 Kg/s.

scholarly journals Comparative Analysis of Exergy and Efficiency for Stratified Thermal Storage Tank with Solar Flat Plate and Evacuated Tube Collectors

2016 ◽  
Vol 855 ◽  
pp. 114-118 ◽  
Author(s):  
Sukruedee Sukchai ◽  
Yodthong Mensin ◽  
Wikarn Wansungnern
Keyword(s):  
Flat Plate ◽  
Solar Collector ◽  
Storage Tank ◽  
Water Heating ◽  
Water Heater ◽  
Solar Water ◽  
Water Heaters ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

In recent years, solar water heating technology has got the major importance in water heating applications. For the efficient and effective working of solar water heaters, storage of the hot water is the main issue in this water heating technologies. This paper mainly presents the exergy and efficiency comparison between the solar flat plate water heater and evacuated tube water heater. A five level stratified thermal storage tank is designed and developed for this analysis. At each level of the tank, temperature of the water is collected for each one hour interval from 9:00 to 16:00 hours in both cases and the overall exergy and efficiency of the two water heaters were calculated. The average efficiency of all the levels for flat plate and evacuated tube collectors are 7.91% and 8.20% respectively. The overall system efficiency is obtained as 39.54% for flat plate and 41.00% for evacuated tube solar collector. At each level exergy is calculate for both systems and the average exergy of all the levels for flat plate collector is 4.243 kW and for evacuated tube solar collector is 4.371 kW.

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