Minimum Energy Performance Standards of Hydroponic Root Zone Cooling System For Lettuce Cultivation on Roof Top Garden

Publication Date : 20/06/2019


Author(s) :

Ahmad Syafik, S., Mohd Syaifudin, A. R., Mohd Shukri, H. B., Mohd Latiman, Y..


Volume/Issue :
Volume 2
,
Issue 1
(06 - 2019)



Abstract :

Hydroponic cultivation techniques usually apply for growing leafy vegetables and sometimes fruit vegetables. Problems commonly associated with hydroponic system are water temperature can easily increase under direct sunlight in the tropics region especially under crop protection structure thus can affects the quality of fertilizer given. A study to develop a cooling system for hydroponic technique which can control the water-dissolved nutrient temperatures that suits the crop growth needs have been conducted to overcome the problem. This paper highlights the development and minimum energy performance determination of the hydroponics root zone cooling (HRZC) system for lettuce cultivation on (6.06 m x 2.35 m) roof top garden. It was found that with the using of only 0.5 hp water pump, the HRZC system was able to distribute and control the hydroponic water-dissolved nutrient temperatures flow to the hydroponic growing container which has a length of 10m long at different height levels of the structure wall. By using only 1.0 hp chiller water system, the ranges of temperatures that can be controlled using the HRZC system were between 15 oC to 25 oC which meets the crop-root zone temperature needs.


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