Abstract
ABSTRACT Like many energy projects, the potential energy savings from the installation of a combined heat and power (CHP) system is based on the system's specifications and the building's previous energy consumption patterns. Although this is a generally accepted way to analyze the feasibility of the system, actual energy savings will often depend on the way the system is ultimately engineered, installed and operated. This article will show the importance for budgeting nominal resources to conduct independent post installation commissioning, metering and data logging (especially on smaller projects). It will show how using independent metering and monitoring can help optimize CHP operations, identify operational problems and limit unwanted thermal dumping. This article will show how actual data and utility metering data collected after the installation of a 150-kW CHP in a New York City (NYC) multi-family building were used to optimize system performance of radiator fans, circulating pumps and existing domestic hot water (DHW) equipment. The article will also show how logger data were used to identify problems with system components that may limit the potential savings to the client. Finally, it will show how post installation monitoring helped establish the optimal seasonal operating hours for the system that maximized thermal energy consumption and minimized unwanted heat dumping.
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