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Internal combustion engines consider as a power source of all machines in agricultural operations. To obtain the optimum performance of these engines there temperature must be maintained at the optimum level. To achieve the previous aim, the engine cooling system must be responsible for the absorption of excess heat from the engines particularly in hot regions. Therefore, this study was conducted in order to solve a problem of failure engine water cooling cycle in warm areas by appending an additional unit to the engine cooling water circuit consisting of an additional thermally insulated tank of water cooled by two pieces of peltier sheets and electric cooling fans. When engine temperature rise above the allowed level, the cooling water path throw the assistant cooling apparatus (peltier cooling unit) to maintain the engine temperature at the ideal level. Four main parameters were taken in this study, five levels of electric current intensity CI (1, 2, 3, 4 and 5 Ampere), four levels of water flow rate FR (0.5, 1, 1.5 and 2 liter/min.), four levels of temperature of inlet water WT (75o, 80o, 85o and 90oC), and two types of flow water FT (free flow and in serpentine). Absorbed heat energy Q=kJ/min was calculated at different levels of studied parameters under study. The obtained results showed that, the peltier sheets with second type of flow water (in serpentine) gained an effective decrease in water temperature, this condition decreased with the  increase of inlet water temperature WT above 85oC. The highest value of absorbed heat energy Q =502.2 kJ/min was gained with (CI5 = 5 amp.), (FR4 = 2 lit/min.) and (WT1 = 75o) at serpentine type of flow water rate (FT1).

NEW APPARATUS TO RAISE THE PERFORMANCE OF ENGINE COOLING WATER CYCLE