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Sizing, Part-Load Operation, and System Performance of Combined Heat and Power

[+] Author Affiliations
Asfaw Beyene

San Diego State University, San Diego, CA

Benjamin Erpelding

San Diego Regional Energy Office, San Diego, CA

Paper No. IMECE2007-42035, pp. 173-178; 6 pages
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 6: Energy Systems: Analysis, Thermodynamics and Sustainability
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4300-9 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME


Because of its superior efficiency and peak load mitigation capabilities, considerable attention has been given recently to combined Cooling, Heating and Power (CCHP). They technology enjoys tax benefits, incentives, accelerated permit processes, etc both at the local, state, and federal levels. One serious challenge to the implementation of CCHP systems is matching and sizing of the system to strongly and frequently varying load conditions. This paper presents matching and sizing related challenges of CCHP systems with emphasis on operation-related and weather-driven load factors. Regional data from the California Public Utilities Commission (CPUC) were used to evaluate the success of recent incentive-driven CHP implementations. It is concluded that while CCHPs have significant cost and performance advantages over traditional single-cycle systems, inadequate strategies — failure to address system flexibilities to accommodate load variations in particular, seem to have negatively impacted these promising technology.

Copyright © 2007 by ASME



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