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Solar heat transformation alternatives
International Journal of Ambient Energy, 1994SYNOPSIS The utilization of solar energy in wintertime corresponds with the low temperature of the produced heat, which is often too low to directly feed heating plants. Heat transformation appears to be an attractive way of increasing the temperature of solar fluids, so that in the present paper some solutions are examined with different operating ...
FELLI, Mauro +2 more
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The use of heat pumps in solar heating in Belgium
Renewable Energy, 1999Abstract On the basis of a short description of electric compression heat pump, an overview is given of the different sources and exchangers used in our projects, in Belgium, during the last two decades, namely: • — at cold source: ◦ — Water loop in ground, water or even air. ◦ — direct expansion in the same, solar assisted for air source.
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Solar Energy, 1982
Abstract The paper describes a series solar heat pump, using Freon 11 as the working fluid. The heat pump is specifically designed for use in a tropical climate where the normal daytime ambient of above 25°C permits the evaporator to be operated at a high temperature (15–50°C depending on solar input).
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Abstract The paper describes a series solar heat pump, using Freon 11 as the working fluid. The heat pump is specifically designed for use in a tropical climate where the normal daytime ambient of above 25°C permits the evaporator to be operated at a high temperature (15–50°C depending on solar input).
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A membrane-enabled solar heat pipe for solar thermal water heating
2012 2nd International Symposium On Environment Friendly Energies And Applications, 2012A membrane-enhanced solar heat pipe loop is presented. The device enables heat transfer between an elevated and low-lying area using a membrane-enabled mechanism. A working solution is vaporized in solar collectors, producing vapor which carries thermal energy to a heat exchanger.
S. Kazadi +11 more
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Cyclotron Heating of the Solar Corona
Astrophysics and Space Science, 1998A physical model of the solar transition region and corona is presented, in which plasma flows in rapidly-diverging coronal funnels and holes are described within the framework of a two-fluid model including wave-particle interactions. The ions are heated by wave dissipation and accelerated by the pressure gradient of high-frequency Alfven waves, which
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A Regional Comparison of Solar, Heat Pump, and Solar-Heat Pump Systems
Journal of Solar Energy Engineering, 1982A comparative study of the thermal and economic performance of the parallel and series solar-heat pump systems, stand-alone solar, and stand-alone heat pump systems for residential space and domestic hot water heating has been undertaken for the United States using FCHART 4.0 [1]. The results are useful for a regional assessment of the viability of the
B. E. Manton, J. W. Mitchell
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Balancing of Solar Heating Options
1984In the field of energy conservation many options are presently competing. This study aims at providing more rational criteria for selection between these options.The options considered are; insulation of the walls, regeneration of the heat in the waste air, double glazing, attached sunspace at the south facade, solar water heating, solar space heating,
Veltkamp, W.B., van Koppen, C.W.J.
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Solar power satellites - Heat engine or solar cells
Conference on Large Space Platforms: Future Needs and Capabilities, 1978A solar power satellite is the energy-converting element of a system that can deliver some 10 GW of power to utilities on the earth's surface. We evaluated heat engines and solar cells for converting sunshine to electric power at the satellite. A potassium Rankine cycle was the best of the heat engines, and 50 microns thick single-crystal silicon cells
Henry Oman, Daniel L. Gregory
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The Energy Impacts of Solar Heating
Science, 1980The energy required to build and install solar space- and water-heating equipment is compared to the energy it saves under two solar growth paths corresponding to high and low rates of implementation projected by the Domestic Policy Review of Solar Energy.
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Solar Space Heating and Cooling Systems
2012This chapter examines solar space heating and cooling systems. Initially, the basic system configurations are presented which include active solar systems in which direct circulation systems, indirect water-heating systems, and air water-heating systems are presented, space heating and service hot water systems which include air and water systems ...
Florides, Georgios A. +2 more
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