Zobrazeno 1 - 10
of 125
pro vyhledávání: '"James W. Stevens"'
Autor:
James W. Stevens, Jackson W. Mason
Publikováno v:
Sustainable Energy Technologies and Assessments. 8:1-8
Liquid piston Stirling engines (sometimes termed “fluidyne” engines) have been studied extensively and applied in a variety of energy conversion applications. They are attractive for low capital costs and simplicity of construction. In addition,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30b4d3d70bfb91a0588533e415fdcb5d
https://doi.org/10.1016/j.seta.2014.06.007
https://doi.org/10.1016/j.seta.2014.06.007
Autor:
James W. Stevens
Publikováno v:
Energy Conversion and Management. 68:114-123
The daily variation in air temperature is large compared with the temperature changes a short distance below the surface of the ground. In theory, a heat engine can be arranged to produce electricity from this temperature difference. In practice, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c157c66bff81ad51f1b79ebee001a5cb
https://doi.org/10.1016/j.enconman.2012.12.029
https://doi.org/10.1016/j.enconman.2012.12.029
Autor:
James W. Stevens, Michael R. Maixner
Publikováno v:
Energy Conversion and Management. 50:2361-2365
For a thermoelectric device driven by the temperature difference between soil and ambient air, previous analytical work has been performed wherein a sinusoidal surface boundary condition was imposed; the results suggested that optimal placement of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fdc2c7e74e318aa2528d5e9657969b6
https://doi.org/10.1016/j.enconman.2009.05.019
https://doi.org/10.1016/j.enconman.2009.05.019
Publikováno v:
Journal of Aircraft. 44:611-615
A key technical challenge for high-altitude (near-space) concepts is autonomous station keeping, or the ability to remain fixed over a geo-location in the presence of winds. Although operational altitudes of 65,000 ft. altitude and above are above we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d82e5a018ed20a9dfbc3318e91862b1f
https://doi.org/10.2514/1.24863
https://doi.org/10.2514/1.24863
Publikováno v:
Measurement. 40:15-20
The propagation of uncertainty in non-linear cases can be handled accurately and easily with a piecewise linear approach to propagating the probability density function through the analysis equation. Previous work outlined this method but did not exa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9f3759ea0072e148268f1de3b5c103a
https://doi.org/10.1016/j.measurement.2006.04.016
https://doi.org/10.1016/j.measurement.2006.04.016
Autor:
James W. Stevens
Publikováno v:
Applied Thermal Engineering. 24:149-157
Heat transfer between the air and the ground is important for a variety of applications including buried pipes and cables, ground source heat pumps, and building insulation. A recent application considered a ground-source heat engine using a thermoel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6daf79a300d2073d7adb91eed666a44
https://doi.org/10.1016/j.applthermaleng.2003.09.004
https://doi.org/10.1016/j.applthermaleng.2003.09.004
Autor:
James W. Stevens
Publikováno v:
Heat Transfer Engineering. 23:34-43
An accurate estimate of the heat transfer from a buried pipe to the surrounding ground is essential for the design of the ground-loop portion of a ground-source heat pump. Exact analytical solutions to this problem are complicated by the fact that he
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::783d12c4b6353eefe8b8d56b610740df
https://doi.org/10.1080/01457630290090482
https://doi.org/10.1080/01457630290090482
Autor:
James W. Stevens, Rogelio Luck
Publikováno v:
SIAM Review. 44:227-233
A simple method to formulate an explicit expression for the roots of any analytic transcendental function is presented. The method is based on Cauchy's integral theorem and uses only basic concepts of complex integration. One convenient method for nu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3c55bf508f870ca1a9cbefce71c76f6
https://doi.org/10.1137/s0036144501386111
https://doi.org/10.1137/s0036144501386111
Publikováno v:
Proceedings of 1st International e-Conference on Energies.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bdd1e396415a910345933d623ba7140
https://doi.org/10.3390/ece-1-d002
https://doi.org/10.3390/ece-1-d002
Autor:
James W. Stevens
Publikováno v:
Energy Conversion and Management. 42:709-720
Thermoelectric generation systems for utilizing waste heat and ambient temperature swings have been proposed that would involve temperature differences on the order of 1–10 K. The inherently low thermodynamic efficiency of such systems requires tha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee30d4cc526c38236a29b0a4ce76a66c
https://doi.org/10.1016/s0196-8904(00)00099-6
https://doi.org/10.1016/s0196-8904(00)00099-6