Farm Power & Machinery

Thermo syphon method

• It consists of a radiator, water jacket, fan, temperature gauge and hose connections as shown in fig. 5.2. The system is based on the principle that heated water which surrounds the cylinder becomes lighter in weight and it rises up wards in liquid column. Hot water goes to the radiator, where it passes through tubes surrounded by air. Circulation of water takes place due to the density difference between the hot water in the engine jacket and cold water in the radiator.
• These two are connected at both sides i.e. at the top and the bottom by using the hose pipe. A fan is driven with the help of a V-belt connected to the crankshaft to suck air through cells of the radiator unit resulting in cooling. The disadvantage of the system is that circulation of water is greatly reduced by accumulation of scale or foreign matter in the passage and consequently it causes overheating of the engine.
  
  Fig. 5.2 Thermo syphon water cooling method