A manual of recommended practices for hydrogen energy systems

Hoagland, William; Leach, Stephen P.

doi:10.1109/iecec.1997.656727

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various authors have studied Stirling engines for power applications. Hoagland et al have characterized the emissions of the diesel-fueled United Stirling P-75 heavy duty truck engine, a 75 kW four-cylinder double-acting system with twin cranks and parallel cylinders arranged in a square. This engine runs on helium pressurized to 14 MPa and exhibits a maximum energy efficiency of 37% under laboratory conditions when fueled by hydrogen.…”

Section: Introductionmentioning

confidence: 99%

Efficiency and Emissions Measurement of a Stirling-Engine-Based Residential Microcogeneration System Run on Diesel and Biodiesel

et al. 2009

View full text Add to dashboard Cite

Concern with climate change and energy security has generated interest in both cogeneration and biofuels. This experimental study examines the performance of a residential microcogeneration system based on a Stirling engine fueled by diesel and biodiesel. Run on diesel, the system achieves a power efficiency of 11.7% and a heat efficiency of 78.7%. The corresponding efficiencies for the system, when run on biodiesel, are slightly lower at 11.5% and 77.5%, respectively. Particulate emissions for biodiesel are 69.2 mg/kWh, an order of magnitude higher than that of diesel (2.3 mg/kWh). The total unburned hydrocarbon emissions for biodiesel are higher than those of diesel. Emissions of carbon monoxide, nitrogen dioxide, methane, acetylene, ethylene, formaldehyde, and acetaldehyde are comparable between diesel and biodiesel, but nitric oxide emissions for diesel are observed to be higher at 151 ppm compared to those for biodiesel (117 ppm). The difference in the performance of the system is generally attributed to higher boiling range compounds in biodiesel that affect the flame stability, the fuel evaporation, and the complete burnout of the fuel. The system achieves energy efficiencies comparable to those of internal-combustion-engine-based and fuel-cell-based cogeneration systems.

show abstract

Section: Introductionmentioning

confidence: 99%