213 Cooling Systems

Cooling systems use either air or liquid. Air-cooled engines are primarily used in small- to medium-sized engines. Fins added to the engine exterior increase surface area for heat loss by radiation and convection. Air-cooled engines tend to have higher ambient noise because of the fan blowing air over the engine. Liquid-cooled engines have internal passages throughout the engine. Figure 2.5 shows the main components of a liquid cooling system with remote radiator and fan.

Normally, there is also a lubricant cooler to keep the lubricating fluid, usually oil, at about 10°C (15°F) above the coolant temperature but below 125°C (255°F). The radiator may be attached to the engine and the radiator fan driven by the engine crankshaft. Alternatively, the radiator may be remotely mounted and the fans driven by electric motors. The latter case usually results in the least noise in the engine room. In total energy installations, the heat is recovered from the oil cooler, engine coolant, and exhaust gases.

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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