Subject:
Title
Request approval for Alban CAT emergency generator for Town Hall.
Body
EXPLANATION AND SUMMARY:
The Department of Public Works worked with on-call engineering consultant Whitman Requardt & Associates to perform a study to determine the required size, fuel type, and major design issues associated with a new generator for Town Hall. The current Town Hall emergency generator is located in the parking lot behind the building adjacent to the dumpster enclosure. The generator previously was located at the Town of Vienna Police Department and was repurposed for Town Hall after the police department generator was upgraded. The existing emergency generator supports life safety and some mission critical loads within Town Hall. It is a Generac 45KW/75 kVA model SG045.
The existing generator is unable to provide sufficient power to run anything beyond current mission critical loads such as the elevator, computer servers, and a limited number of offices. A new appropriately sized generator will reliably run all computer servers, offices, and other power needs that will allow Town Hall to remain open during power outages. In addition, a new generator is required to provide sufficient and reliable emergency power to police operations, which will be relocated to Town Hall during construction of the new police station. Finally, the current generator is at the end of its useful life and puts out inconsistent power, which can damage electrical equipment.
The proposed new generator will serve the entire Town Hall with reliable power. It will have a natural gas engine that does not need to be refueled like a diesel engine. A natural gas engine also operates efficiently at lower power loads than a diesel engine, which cannot operate below 80% of its rated capacity without what is called "wet stacking." Wet stacking occurs when the generator does not burn all of the fuel before it is exhausted. The fuel then builds residue in the exhaust system. This requires extr...
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