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Title: Detailed thermodynamic investigation of an ICE-driven, natural gas-fueled, 1 kWe micro-CHP generator

Abstract

Here, the purpose of this work is to record the baseline performance of a state-of-the-art micro-combined heat and power (mCHP) system. A second goal of this work is to provide detailed thermodynamic first and second law performance measurements of the internal combustion engine and generator subsystems. A global technology survey was conducted to identify the leading mCHP systems in the 1 kW electric range. The Honda ECOWILL was identified as the state-of-the-art system in the United States, and an unused unit was procured. The ECOWILL underwent round-robin performance testing at three independent laboratories. First law (energy) and second law (exergy) analyses were conducted on the steady state data. Analysis revealed the ECOWILL operated at a first law electrical efficiency of 23.5 ± 0.4% and a utilization factor of 74.5 ± 3.2%. The primary energy loss was heat transfer from the device, followed by chemical and thermal energy in the exhaust stack. The second law analysis showed the ECOWILL operated at a second law electrical efficiency of 23.1 ± 0.4% and total (including exergy in both the electrical and recovered waste heat streams) second law efficiency of 30.2 ± 2.3%. Key areas of exergy destruction were, in decreasing magnitude, heat transfer,more » combustion irreversibility, and generator and friction losses.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [3];  [1]
  1. Oregon State Univ., Bend, OR (United States)
  2. Oak Ridge National Lab. (ORNL), Knoxville, TN (United States)
  3. Booz Allen Hamilton, Washington, D.C. (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI Identifier:
1436052
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Energy Conversion and Management
Additional Journal Information:
Journal Volume: 166; Journal Issue: C; Journal ID: ISSN 0196-8904
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Residential cogeneration; Micro combined heat and power; Thermodynamic analysis; Internal combustion engine; Exergy analysis; CHP

Citation Formats

Taie, Zachary, West, Brian H., Szybist, James P., Edwards, Dean K., Thomas, John F., Huff, Shean P., Vishwanathan, Gokul, and Hagen, Christopher. Detailed thermodynamic investigation of an ICE-driven, natural gas-fueled, 1 kWe micro-CHP generator. United States: N. p., 2018. Web. doi:10.1016/j.enconman.2018.04.077.
Taie, Zachary, West, Brian H., Szybist, James P., Edwards, Dean K., Thomas, John F., Huff, Shean P., Vishwanathan, Gokul, & Hagen, Christopher. Detailed thermodynamic investigation of an ICE-driven, natural gas-fueled, 1 kWe micro-CHP generator. United States. doi:10.1016/j.enconman.2018.04.077.
Taie, Zachary, West, Brian H., Szybist, James P., Edwards, Dean K., Thomas, John F., Huff, Shean P., Vishwanathan, Gokul, and Hagen, Christopher. Thu . "Detailed thermodynamic investigation of an ICE-driven, natural gas-fueled, 1 kWe micro-CHP generator". United States. doi:10.1016/j.enconman.2018.04.077.
@article{osti_1436052,
title = {Detailed thermodynamic investigation of an ICE-driven, natural gas-fueled, 1 kWe micro-CHP generator},
author = {Taie, Zachary and West, Brian H. and Szybist, James P. and Edwards, Dean K. and Thomas, John F. and Huff, Shean P. and Vishwanathan, Gokul and Hagen, Christopher},
abstractNote = {Here, the purpose of this work is to record the baseline performance of a state-of-the-art micro-combined heat and power (mCHP) system. A second goal of this work is to provide detailed thermodynamic first and second law performance measurements of the internal combustion engine and generator subsystems. A global technology survey was conducted to identify the leading mCHP systems in the 1 kW electric range. The Honda ECOWILL was identified as the state-of-the-art system in the United States, and an unused unit was procured. The ECOWILL underwent round-robin performance testing at three independent laboratories. First law (energy) and second law (exergy) analyses were conducted on the steady state data. Analysis revealed the ECOWILL operated at a first law electrical efficiency of 23.5 ± 0.4% and a utilization factor of 74.5 ± 3.2%. The primary energy loss was heat transfer from the device, followed by chemical and thermal energy in the exhaust stack. The second law analysis showed the ECOWILL operated at a second law electrical efficiency of 23.1 ± 0.4% and total (including exergy in both the electrical and recovered waste heat streams) second law efficiency of 30.2 ± 2.3%. Key areas of exergy destruction were, in decreasing magnitude, heat transfer, combustion irreversibility, and generator and friction losses.},
doi = {10.1016/j.enconman.2018.04.077},
journal = {Energy Conversion and Management},
number = C,
volume = 166,
place = {United States},
year = {Thu May 03 00:00:00 EDT 2018},
month = {Thu May 03 00:00:00 EDT 2018}
}

Journal Article:
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