Equations for estimating global solar radiation in data sparse regions

TC Chineke - Renewable Energy, 2008 - Elsevier
Renewable Energy, 2008Elsevier
The knowledge of the amount of solar radiation in an area/region is very essential in the field
of Solar Energy Physics. In this work two equations are put forward for estimating global
solar radiation from common climate variables in data sparse regions. The first is the
Hargreaves equation, Rs= 0.16 RaTd0. 5 where Ra is the extraterrestrial solar radiation and
Td is the temperature difference (maximum minus minimum), while the second is the
Angstrom equation, Rs= Ra (0.28+ 0.39 n/N) where n and N are the measured sunshine …
The knowledge of the amount of solar radiation in an area/region is very essential in the field of Solar Energy Physics. In this work two equations are put forward for estimating global solar radiation from common climate variables in data sparse regions. The first is the Hargreaves equation, Rs=0.16RaTd0.5 where Ra is the extraterrestrial solar radiation and Td is the temperature difference (maximum minus minimum), while the second is the Angstrom equation, Rs=Ra(0.28+0.39n/N) where n and N are the measured sunshine hours and the maximum daylight duration respectively. The global solar radiation estimated by the two equations for three sites, Owerri (5°28′N, 7°2′E), Umudike (5°29′N, 7°33′E) and Ilorin (8°32′N, 4°46′E), located in different climate zones of in Nigeria, West Africa, are in agreement with those of earlier workers and that from Photovoltaic Geographic Information System (PVGIS) project. The implication of this in solar photovoltaic applications has been stressed.
Elsevier
以上显示的是最相近的搜索结果。 查看全部搜索结果