scholarly journals Thermal performance of an evacuated tube heat pipe solar water heating system in cold season

2019 ◽  
Vol 149 ◽  
pp. 644-657 ◽  
Author(s):  
Abdellah Shafieian ◽  
Mehdi Khiadani ◽  
Ataollah Nosrati
Keyword(s):  
Heat Pipe ◽  
Thermal Performance ◽  
Heating System ◽  
Cold Season ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water ◽  
Solar Water Heating System ◽  
Evacuated Tube

scholarly journals Energy and Economic Estimation for a Passive Solar Water Heating System Equipped with a Heat Pipe Evacuated Tube Collector:

2020 ◽  
Vol 5 (3) ◽  
pp. 348-352
Author(s):  
Altin Maraj
Keyword(s):  
Heat Pipe ◽  
Solar Collector ◽  
Heating System ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water ◽  
Evacuated Tube Collector ◽  
Passive Solar ◽  
Solar Water Heating System ◽  
Evacuated Tube

The energy and the economic estimation for a passive solar water heating system under the Tirana climate conditions is performed. The trial system includes a heat pipe evacuated tube collector. To fulfil these objectives, measured values recorded every minute from the data logger of the system are used. The studied solar collector has a slope of 45° and is oriented 10° East from the South direction. The heat pipe evacuated tube collector has an aperture area of 1.476 m2. For an annual time period the irradiation on tilted solar collector area, the extracted energy from the storage tank, the delivered energy to the thermal consumer and the system efficiency were defined. Also, the economic assessment of the system is performed.

Experimental Research on a Novel Solar Water Heating System by Using Loop Heat Pipe

2013 ◽  
Vol 724-725 ◽  
pp. 163-170
Author(s):  
Zhang Yuan Wang ◽  
Xiang Mei Zhang ◽  
Wan Sheng Yang ◽  
Zhi Wu Chen
Keyword(s):  
Heat Pipe ◽  
High Efficiency ◽  
Heating System ◽  
Hot Water ◽  
Loop Heat Pipe ◽  
Water Heating ◽  
Solar Water Heating ◽  
Solar Water ◽  
Evacuated Tubes ◽  
Solar Water Heating System

In this paper, a novel solar water heating system will be proposed by applying the loop heat pipe to a conventional split solar hot water system, which will have the characteristics of high efficiency, low cost, appearance appealing and building integration. Three types of the system, i.e., the system with evacuated tubes, with single flat-plate glazing cover, and without glazing, will be experimentally investigated and compared on the influence to the dynamic performance of the system. It was found that the system’s operating temperature increased significantly during the start-up stage and gently after until reach relatively constant. The instantaneous efficiency was found to be fluctuated, although it reached stable eventually during the operations for all three types. By using the moving average calculating method, every 10 minutes were applied for the calculation of the average efficiency which had a negative linear relation with the combined factor of (Tmean-Tamb)/I. In general, the solar system with evacuated tubes performed the best with the highest water temperature output, highest system efficiency and lowest heat loss coefficient among the three systems.

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