123 Installation of a DG Unit

This portion of the code approval process addresses electrical safety, fuel supply and storage, and access (by the fire department or other public safety officials).

UL 2200 is the most commonly cited reference for combustion engines and gas turbines in stationary power applications and can be considered to cover microturbines, although the product is not currently referenced. The requirements cover engine-generator assemblies rated 600 volts or less and intended for use in ordinary locations in accordance with the National Electrical Code, NFPA 37 (Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines), NFPA 99 (Standard for Health Care Facilities), and NFPA 110 (Standard for Emergency and Standby Power Systems). UL 2200 does not cover hazardous (classified) locations or uninterruptible power source (UPS) equipment. This is not a performance standard.

NFPA 853, Standard for the Installation of Fuel Cells, provides for the design, construction, and installation of both prepackaged and field-constructed power plants above 50 kW gross electrical output. Unlike the previously approved ANSI standard Z21.83, NFPA 853 covers a variety of fuel sources (Z21.83 is for natural-gas supplied systems only).

NFPA 37, Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines, historically covered units to 7500 horsepower output. That language was eliminated in the current draft (1998) and can now be considered to cover microturbines as well.

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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