Dominick Denis’ 500-Word Article Summary

TO: Prof. Jason W. Ellis

FROM: Dominick Denis

DATE: 9/17/19

SUBJECT: 500-Word Summary of L. Gourdo’s et al “Solar energy storing rock-bed to heat an agricultural greenhouse”

Researchers, such as Gourdo et al, have taken more consideration in the expansion of the boundaries surrounding agricultural production. Based on the article, “Solar energy storing rock-bed to heat an agricultural greenhouse” in Energy, it has been gathered that with the use of renewable energized heating technologies optimal growth for crops can be attained. As the technologies are being implemented within a greenhouse, they will be monitored through the seasons, as well as, the times in a day.

During the coldest periods of the year, maintaining agriculture is important in sustaining good land for a people. The land of Morocco, more specifically, in the region of Souss Massa areas have seen an increase in crops. Unfortunately, this increase was a part of a negative correlation as there had been a significant decrease in quality of production during the season of winter. The research of the Faculty of Science will test the effectiveness of a solar greenhouse heating system in order to make justify it as a viable solution for agricultural purposes.

As the heating systems serve as the best solution, farmers are forced to equip them only to meet the harvested products standards needed for export. The experimental heating systems of the renewable energy kind offer the most beneficial results compared to that of the conventional fossil fueled system. On the aspect of solar energy, several systems were studied but matters of pricing and installation considered obstacles. Researchers would, then, study an underground rock-bed that would be able to heat a 15 m² tunnel greenhouse. As the rocks stored solar energy from the greenhouse during the day, it would also restore it at night. To maintain the inside air temperature of a greenhouse was the goal, especially during extreme nights of winter.

The measurements of climate parameters, like temperature, relative humidity, and soil temperature, between the experimental and conventional greenhouses were taken and studied throughout the year. In order to measure parameters on the outside of the greenhouses a weather station was installed. Measurement on crop parameters weren’t disregarded as both greenhouses were fed by the same ferti-irrigation system. Specifications of rocks and layers of rock were recorded in order to facilitate the circulation of air in the reservoir of the rock-bed. Numerous tests were done on various aspects of this research in order to come to a final conclusion.

As the processes were put in motion, they eventually came to a halt. According to Gourdo et al, “In conclusion, greenhouse solar heating system, using rock-bed, is a profitable system, easy to install…” (Gourdo et al, 2019, 211). Requirements were met, from air temperature to an increase in yield. Ultimately, the efficiency of a solar heating system proved to be optimal.


Gourdo, L., Fatnassi, H. et al. (15 February 2019). Solar energy storing rock-bed to heat an agricultural greenhouse. Energy, Volume 169, Pages 206-212. Retrieved from ARTICLE1 solar energy store.pdf or

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