Analisis Pindah Panas pada Pipa Utama Sistem Hidroponik Substrat dengan Pendinginan Larutan Nutrisi

Abstract

Cooled nutrient solution will have temperature rises during distributed to the root zone of the plants. The aim of the research was to analyze the heat transfer from environment to the main pipe of irrigation for hydroponic substrate system, to validate the heat transfer model, and to simulate inlet temperature for nutrient solution cooling planning. Heat transfer model was developed from heat transfer and fluid flow in pipe equations. Validation of heat transfer model was done using linear regression analysis method. Simulation was done by calculating temperature of inlet nutrient solution which is proper to get optimum temperature for plants using validated heat transfer model. The result of heat transfer model validation showed that the heat transfer model is fairly accurate to predict the temperature of nutrient solution in the main pipe. The simulation result showed that to obtain 20 °C temperature of nutrient solution at the end of ¾ inch PVC uninsulated main pipe with a length of 20 m, the inlet nutrient solution must be cooled to temperature of 18.06 °C.