Deployment of distributed generation is increasing due to green and zero-energy building initiatives and other enabling clean energy policies. CHP, also known as cogeneration, has been used since Thomas Edison’s time to provide simultaneous power and steam to energy users with large thermal loads, such as large industrials and college campuses. Recent advances in technologies, controls and packaged systems enable widespread application in commercial, light industrial and institutional buildings.
CHP is typically described by proponents as a “fully integrated, highly efficient distributed energy system” and best practices in CHP system design are based on analysis of thermal and electrical load profiles and system sizing to match site thermal needs, offsetting boilers and chillers. In addition to the efficiency gains and cost savings associated with CHP, the systems are being used to provide reliable backup power to facilities in the event of a utility outage, protecting mission critical facilities such as hospitals, datacenters and labs. But how efficient is it really and how integrated is “integrated”? How are these systems actually operating?
This session will provide an overview of CHP system design and operation. We will provide a basic introduction as we discuss the market trends and policy environment for CHP, technologies and applications, economic evaluation of CHP systems, CHP industry best practices and typical practices. Then with the basics down, we will present case studies of CHP systems in hospitality, health care and light industrial applications, exploring challenges in installation, commissioning and operation of these systems. Case study systems will include prime movers such as engines, micro-turbines and turbines and thermal applications including hot water, steam, chilled water from absorption chillers and thermal energy storage.
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