0

Full Content is available to subscribers

Subscribe/Learn More  >

Development and Evaluation of a Micro-Cogeneration Prototype for Residential Applications

[+] Author Affiliations
Ana C. M. Ferreira, Francisco Madureira, Manuel L. Nunes, Celina P. Leão, Senhorinha F. C. F. Teixeira, José C. F. Teixeira, Luís B. Martins

University of Minho, Guimarães, Portugal

Paper No. IMECE2010-39192, pp. 1357-1364; 8 pages
doi:10.1115/IMECE2010-39192
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4429-8
  • Copyright © 2010 by ASME

abstract

Combined heat and power (CHP) units use heat that would otherwise be wasted in a conventional power plant, and may reach an overall efficiency above 90% (LHV), which is well above to the 40% achieved by reference plants. This paper presents the design and development of a micro-cogeneration prototype (<6kWe) for single family households. The unit is based on a commercially available internal combustion engine (ICE) and generator, optimized and modified to be fuelled by natural gas, coupled to a two-step exhaust heat recuperating system. The work starts with the thermodynamic analysis of the ICE operating cycle and the assessment of thermal energy that can be recovered from the exhaust gases and through the engine cooling system. The analysis included the study of gas-mixture composition, combustion, heat loss to engine walls and water-vapor mass transfer. The main innovation is the exhaust gases heat recovery system, developed in two stages. The first stage consists on a direct heat exchanger where water is heated by direct contact with hot jets of exhaust gases, while the second stage heat exchanger involves further cooling of the saturated gases and condensation of evaporated water. The results showed the potential for significant gains in engine performance. The effective thermal power recovered in the recuperating system is reasonable, since the CHP system is able to produce 6.58 kWe of electrical energy and 11.16 kW of thermal energy.

Copyright © 2010 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