Investigation of the Relationship between Discharge - Pressure and Discharge- Temperature in the Conventional Compensating Emitters

One of the most important issues in trickle irrigation design is investigating the emitter''s characteristics، the effect of factors on flow rate، and finally appropriate emitter selection. Therefore، in this study nine types of pressure compensating emitters with codes of A، B، C، D، E، F، G، M and N، made based on trickle irrigation physical model were tested and the effects of four different water temperatures (13، 23، 33 and 43°C) with different pressure ranges (between zero and 1. 2 times more than the maximum pressure) on the emitters were evaluated. All experiments were carried out based on ISO 9261 standard and IRISI 6775 standard of the Institute of Standards & Industrial Research of Iran. The obtained results at all the tested temperatures، no emitter has x more than 0. 2 and all emitters were pressure compensating types. The effect of temperature on the flow rates of models F، M and N was significant at 95% confidence level. Increase in temperature showed an increase in the flow rates of the above mentioned models.