scholarly journals Cost-effective solar collectors using heat pipes. Final technical report, July 1979-August 1981

1981 ◽  
Author(s):  
D. Ernst
Keyword(s):  
Heat Pipes ◽  
Cost Effective ◽  
Solar Collectors ◽  
Technical Report

Research at the Building Research Establishment into the applications of solar collectors for space and water heating in buildings

1980 ◽  
Vol 295 (1414) ◽  
pp. 403-414
Keyword(s):  
Solar Collector ◽  
Water System ◽  
Cost Effective ◽  
Heating System ◽  
Field Studies ◽  
Hot Water ◽  
Solar Collectors ◽  
Water Heating ◽  
Actual Performance ◽  
Low Efficiency

A completed study of a solar hot water heating system installed in a school showed an annual average efficiency of 15%, the low efficiency largely caused by the unfavourable pattern of use in schools. Field studies, in 80 existing and 12 new houses, of a simple domestic hot water system have been initiated to ascertain the influence of the occupants on the actual performance of solar collector systems. The development of testing methods of solar collectors and solar water heating systems is being undertaken in close collaboration with the B.S.I. and the E.E.C. Solar space heating is being investigated in two experimental low energy house laboratories, one using conventional solar collectors with interseasonal heat storage and the other a heat pump with an air solar collector. Studies of the cost-effectiveness of solar collector applications to buildings in the U.K. show that they are far less cost-effective than other means of conserving energy in buildings.

Testing and Analysis of a Heat-Pipe Solar Collector

1983 ◽  
Vol 105 (4) ◽  
pp. 440-445 ◽  
Author(s):  
J. Ribot ◽  
R. D. McConnell
Keyword(s):  
Heat Pipe ◽  
Solar Collector ◽  
High Efficiency ◽  
Heat Pipes ◽  
Solar Collectors ◽  
Empirical Tests ◽  
Heat Transfer System ◽  
Evacuated Tube ◽  
Glass Heat ◽  
Theoretical Analyses

We developed an integral heat-pipe/evacuated-tube solar collector in which the inner receiver tubes form the evaporator sections of glass heat pipes. This paper describes both theoretical analyses and empirical tests, comparing the performance of the glass heat-pipe solar collector with one of today’s high efficiency evacuated-tube solar collectors. The comparison demonstrates that the performance of the two collectors is effectively identical. The testing and analysis indicate that the glass-wick-type glass heat pipe is an effective heat transfer system for evacuated-tube solar collectors.

scholarly journals Pollution-Free Road Lighting

2001 ◽  
Vol 24 (3) ◽  
pp. 364-364 ◽  
Author(s):  
Duco A. Schreuder
Keyword(s):  
Developing Countries ◽  
Low Income ◽  
Road Traffic ◽  
Cost Effective ◽  
Low Income Countries ◽  
Industrialized Countries ◽  
Policy Makers ◽  
Beneficial Effects ◽  
Road Lighting ◽  
Technical Report

The beneficial effects of road lighting are often seen as very important. They relate to reducing road accidents and some forms of crime but also enhance the social safety of residents and pedestrians and the amenity for residents. Road traffic in developing countries is much more hazardous than in industrialized countries. Accident rates in ‘low’ income countries may be as much as 35 times higher than in ‘high’ income countries. Thus, it might be much more cost-effective to light roads in the developing world than in the industrialized world. Fighting light pollution is more pressing in developing countries as most of the major high-class astronomical observatories are there. Astronomical observations are disturbed by light from outdoor lighting installations, part of which is scattered in the atmosphere to form ‘sky glow’. The International Lighting Commission CIE has published a Technical Report giving general guidance for lighting designers and policy makers on the reduction of the sky glow.

Optimum Seeking Position Control of Solar Collectors

2009 ◽  
Vol 62-64 ◽  
pp. 537-542
Author(s):  
A.S. Kadalla ◽  
I.L. Samaila ◽  
N.Z. Oriolowo
Keyword(s):  
Feedback Control ◽  
Experimental Work ◽  
Position Control ◽  
Cost Effective ◽  
Solar Collectors ◽  
Solar Systems ◽  
The World ◽  
Solar Conversion ◽  
The Cost ◽  
Feedback Control Theory

The main hindrance to the widespread of solar systems is the cost of the solar collectors. Researchers all over the world have been exploring different means of overcoming this limitation in order to make solar conversion more cost effective. This paper describes an experimental work on optimum seeking position of solar collectors using feedback control theory. Single axis tracking mode is employed together with sun seek sensor for automatic reset. The performance of the tracking collector compares favorably against a fixed collector.

Heat pipes thermoelectric solar collectors for energy applications

2017 ◽  
Vol 42 (12) ◽  
pp. 8310-8313 ◽  
Author(s):  
Gunay Omer ◽  
Abdullah Hakan Yavuz ◽  
Rasit Ahiska
Keyword(s):  
Heat Pipes ◽  
Solar Collectors ◽  
Energy Applications
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