Enhancement of ground radiation in greenhouses by reflection of direct sunlight
Abstract
Substantial gains in greenhouse ground illumination/irradiance were obtained with a reflecting wall that was positioned so as to reflect the incoming sunlight from the northern face of the greenhouse to its ground. The effect was particularly significant in winter when the sun was low throughout the day and most of the radiation passed through the greenhouse so that its ground radiant power was reduced. Four types of greenhouse with reflecting walls exhibiting increasing efficiencies of insolation were developed. A theory describing a several-fold enhancement of ground irradiance and radiant energy was developed. Effects of sky (diffuse) radiation on clear and cloudy days were also considered. An experimental model, as well as a full-scale greenhouse with a reflecting wall with provision for measuring ground illumination was constructed and exposed to the sun: Actual measurements were conducted over several days, supporting the theoretical calculations.
Keywords:
Enhancement of ground insolation / Greenhouse energy efficiency / Reflection of solar radiationSource:
Renewable Energy, 2002, 26, 4, 561-586
DOI: 10.1016/S0960-1481(01)00155-0
ISSN: 0960-1481
WoS: 000174658300005
Scopus: 2-s2.0-0036680960
Collections
Group
RAUmPlanTY - JOUR AU - Pucar, Mila PY - 2002 UR - https://raumplan.iaus.ac.rs/handle/123456789/42 AB - Substantial gains in greenhouse ground illumination/irradiance were obtained with a reflecting wall that was positioned so as to reflect the incoming sunlight from the northern face of the greenhouse to its ground. The effect was particularly significant in winter when the sun was low throughout the day and most of the radiation passed through the greenhouse so that its ground radiant power was reduced. Four types of greenhouse with reflecting walls exhibiting increasing efficiencies of insolation were developed. A theory describing a several-fold enhancement of ground irradiance and radiant energy was developed. Effects of sky (diffuse) radiation on clear and cloudy days were also considered. An experimental model, as well as a full-scale greenhouse with a reflecting wall with provision for measuring ground illumination was constructed and exposed to the sun: Actual measurements were conducted over several days, supporting the theoretical calculations. T2 - Renewable Energy T1 - Enhancement of ground radiation in greenhouses by reflection of direct sunlight VL - 26 IS - 4 SP - 561 EP - 586 DO - 10.1016/S0960-1481(01)00155-0 ER -
@article{ author = "Pucar, Mila", year = "2002", abstract = "Substantial gains in greenhouse ground illumination/irradiance were obtained with a reflecting wall that was positioned so as to reflect the incoming sunlight from the northern face of the greenhouse to its ground. The effect was particularly significant in winter when the sun was low throughout the day and most of the radiation passed through the greenhouse so that its ground radiant power was reduced. Four types of greenhouse with reflecting walls exhibiting increasing efficiencies of insolation were developed. A theory describing a several-fold enhancement of ground irradiance and radiant energy was developed. Effects of sky (diffuse) radiation on clear and cloudy days were also considered. An experimental model, as well as a full-scale greenhouse with a reflecting wall with provision for measuring ground illumination was constructed and exposed to the sun: Actual measurements were conducted over several days, supporting the theoretical calculations.", journal = "Renewable Energy", title = "Enhancement of ground radiation in greenhouses by reflection of direct sunlight", volume = "26", number = "4", pages = "561-586", doi = "10.1016/S0960-1481(01)00155-0" }
Pucar, M.. (2002). Enhancement of ground radiation in greenhouses by reflection of direct sunlight. in Renewable Energy, 26(4), 561-586. https://doi.org/10.1016/S0960-1481(01)00155-0
Pucar M. Enhancement of ground radiation in greenhouses by reflection of direct sunlight. in Renewable Energy. 2002;26(4):561-586. doi:10.1016/S0960-1481(01)00155-0 .
Pucar, Mila, "Enhancement of ground radiation in greenhouses by reflection of direct sunlight" in Renewable Energy, 26, no. 4 (2002):561-586, https://doi.org/10.1016/S0960-1481(01)00155-0 . .