First Results of Heating Greenhouses by a Passive Solar System in Gafsa (South-West of Tunisia)

Amor, Hamza Ben; Salhi, Mourad; Zid, A. Ben; Verlodt, H.

doi:10.17660/actahortic.1990.263.12

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“…This heat is then stored in water (Butler, 1985). A passive solar heating system was used by Ben-Amor et al (1990) for heating greenhouses by using EVA (Ethylene-vinyl acetate) plastic tubes (320 mm in diameter) filled with water and capturing solar energy during the daylight and distributing it back during the night. Yahia (2006) studied and investigated the possibility of utilizing a passive solar energy system for warming the environment of the cucumber crop.…”

Section: Introductionmentioning

confidence: 99%

Warming Beehives with Solar Energy Stored in Water

Al-Rajhi

2022

Türkiye Tarımsal Araştırmalar Dergisi

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This study presents the possibility of utilizing a passive solar system in sunny places, which collects solar energy by using polyethylene sheet to trap the long-wave thermal radiation and store it in water for warming the internal environment of beehives and its effect on nest temperatures, honey area, pollen area, sealed brood area, and the number of occupied frames. A number of six Langstroth hives containing honeybee colonies of equal strength from the species of hybrid Carniolan are divided into two groups as follows: a control group (untreated hive), and modified beehives that have been treated with the solar energy storage system. The solar energy storage system consists of an insulated wooden drawer located under the beehive's bottom board, containing sealed water bags, and is covered with polyethylene sheet. Solar energy stored in water is used to reduce the variation of inside air temperatures between daylight and night time. The highest values of the honey area, pollen area, sealed brood area, and the number of occupied frames (916 cm2, 842 cm2, 3688 cm2, and 9 frames, respectively) were shown for the modified beehives at the end of March, while the lowest values (98 cm2, 219 cm2, 911 cm2, and 3 frames, respectively) were recorded for the control groups of beehives at January, respectively. In modified beehives treated with a solar energy storage system, there was a significant rise in hive temperature, honey area, pollen area, sealed brood area, and bee population. So, it is recommended to use the new modification for warming beehives.

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Section: Introductionmentioning

confidence: 99%

Warming Beehives with Solar Energy Stored in Water

Al-Rajhi

2022

Türkiye Tarımsal Araştırmalar Dergisi

View full text Add to dashboard Cite

show abstract

First Results of Heating Greenhouses by a Passive Solar System in Gafsa (South-West of Tunisia)

Cited by 1 publication

References 0 publications

Warming Beehives with Solar Energy Stored in Water

Warming Beehives with Solar Energy Stored in Water

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