Test result analysis of the stagnation effect on the thermal performance of solar collector

Zhang, Xinyu; You, Seung-Kyong; Xu, Wei; Zheng, Xuejing; He, Tao; Zhulian, Huang; Zhang, Lei; Deng, Yu

doi:10.1016/j.egypro.2012.11.093

Cited by 6 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It only leads to increasing investments with decreasing usability. Among other things, over-dimensioning of the system leads to stagnation and thus to degradation of the heat transfer medium and solar collectors [10][11][12][13]. The system with two or three solar collectors appears to be optimal for the designed conditions.…”

Section: Solar Water Heating System Optimizingmentioning

confidence: 99%

Optimization and economic assessment of renewable energy sources and their combinations for Central Europe

Skovajsa

Zálešák

2019

MATEC Web Conf.

View full text Add to dashboard Cite

The article deals with the economic evaluation of investment and optimization of the renewable energy sources for family houses. For example, from the point of view of solar systems, the optimal solution is based on the specific application of it. The design is dependent on the location of the panels and ration between active aperture area and real daytime consumption. Common calculations according to actual standards often give overstated results, which also reflected in the value of the investments. The article shows the research of optimal parameters of the thermal solar system for preparing of domestic hot water. A combination of related standards and software TRNSYS are used to find optimal parameters. Thanks to created and verified simulation models, it is possible to design parameters so as to avoid under-dimensioning or over-dimensioning of the each system. Energy price is another factor affects the payback period of investments. This is affected by the used energy sources and their combination. For example, buildings that use electricity to heat water or heating have different energy charges than a building that uses natural gas. So, the aim is to find optimal solution of the combination of renewable energy sources.

show abstract

Section: Solar Water Heating System Optimizingmentioning

confidence: 99%

Optimization and economic assessment of renewable energy sources and their combinations for Central Europe

Skovajsa

Zálešák

2019

MATEC Web Conf.

View full text Add to dashboard Cite

show abstract

“…During these periods, referred to as stagnation conditions, there is the potential to seriously damage solar collectors or system components, accelerate the degradation of materials and heat transfer fluids, and even lead to user scalding. While the latter may be controlled by mixing valves, loss of performance and system degradation is more difficult to control [16,17].…”

Section: Introductionmentioning

confidence: 99%

The Synergistic Effect of Thermal Collectors Rotation in relation to Their Energy Efficiency and Stagnation Compared with the Static Thermal System in the Conditions of Central Europe

Rimár¹,

Fedak²,

Hatala³

et al. 2015

International Journal of Photoenergy

View full text Add to dashboard Cite

The presented paper deals with the issue of the efficient use of solar energy potential gained from thermal panels via tracking the Sun’s trajectory. Based on long-term measurements of the selected parameters, the efficiency of the installed system in relation to the ecliptic was evaluated in the static regime as well as in a rotary regime. In the comparison of rotary and fixed system of the collectors the presented results show an increase of the effectiveness of rotary one during the period of the day. On closer view the increase is not constant. During the day it varies: the most significant increase is in the afternoon, while the time from 10:30 a.m. to 1:00 p.m. the effectiveness of both systems almost identical. The utilisation of the rotary system as a suitable instrument for the elimination of the system stagnation was also evaluated.

show abstract

Stagnation and Solar Fraction Analysis on Solar Thermal Integration in Southeast Asia

Kong

Lim

Walmsley

et al. 2021

Process Integr Optim Sustain

View full text Add to dashboard Cite

Test result analysis of the stagnation effect on the thermal performance of solar collector

Cited by 6 publications

References 0 publications

Optimization and economic assessment of renewable energy sources and their combinations for Central Europe

Optimization and economic assessment of renewable energy sources and their combinations for Central Europe

The Synergistic Effect of Thermal Collectors Rotation in relation to Their Energy Efficiency and Stagnation Compared with the Static Thermal System in the Conditions of Central Europe

Stagnation and Solar Fraction Analysis on Solar Thermal Integration in Southeast Asia

Contact Info

Product

Resources

About