0

Full Content is available to subscribers

Subscribe/Learn More  >

Economic, Emissions, and Energy Benefits From Combined Heat and Power Systems by Location in the United States Based on System Component Efficiencies

[+] Author Affiliations
Amanda D. Smith

University of Utah, Salt Lake City, UT

Pedro J. Mago

Mississippi State University, Mississippi State, MS

Paper No. IMECE2013-64566, pp. V06AT07A034; 8 pages
doi:10.1115/IMECE2013-64566
From:
  • ASME 2013 International Mechanical Engineering Congress and Exposition
  • Volume 6A: Energy
  • San Diego, California, USA, November 15–21, 2013
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5628-4
  • Copyright © 2013 by ASME

abstract

A graphical evaluation is performed for combined heat and power (CHP) systems using screening parameters for optimized performance with respect to operating costs, emissions, and energy consumption. CHP systems have the potential to reduce operating costs, emissions, and primary energy consumption when compared with electricity purchased from the grid and thermal energy produced from a boiler, and these benefits have been shown to depend on the location where the system is to be installed as well as the characteristics of the system itself. A CHP system is analyzed in 9 U.S. cities in different climate zones which differ in both the local electricity generation fuel mix and local electricity prices. Its potential to produce economic, emissions, and energy savings is quantified based on the concepts of required spark spread, emissions spark spread, and primary energy spark spread. The corresponding parameters for cost ratio, carbon dioxide emissions ratio, and primary energy ratio are plotted on a 3-dimensional graph which illustrates these potential benefits simultaneously. The location of each point on the 3-D graph indicates for a given geographical location whether the system falls within a region of multiple potential benefits from CHP technology. The results are unique to the efficiencies of the CHP system components and the alternate heating system. A simple sensitivity analysis is then conducted to examine the influence of electrical generation efficiency, the percentage of heat recovered, and the heating system on the cost, emissions, and energy savings potential of CHP systems. Of the 9 cities analyzed, Duluth, MN, is shown to have the greatest potential to provide these three types of benefits by using a CHP system. The results are most sensitive to the values of two input parameters: CHP electrical efficiency and CHP thermal efficiency. Changes in the input efficiency values are most influential when the electrical efficiency is low, and as the amount of recovered heat goes to 0, the electrical efficiency becomes the most important factor in whether a CHP shows the potential for cost, emissions, and energy benefits.

Copyright © 2013 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In