| 词条 | Heterogeneous combustion |
| 释义 |
ApplicationsWithin the literature, there many applications of heterogeneous combustion which are derived from the unique manner in which this combustion process recirculates heat. These devices may be utilized as either stand alone devices, or in conjunction with other means of energy conversion for highly efficient combined heat and power (CHP) applications. For example, electricity production via both radiative and convective heat exchange with the combustion chamber can be accomplished using Organic Rankine Cycles in a multi step heating process,[1] or using strictly radiative emissions via photovoltaic and thermionic generators.[1] Heterogeneous combustors may be utilized for small-scale heating purposes,[3] and as oxidizers of volatile organic compounds (VOCs).[4] Heterogeneous combustion may also be combined in series and parallel with multiple injection stages for use in gas flares at chemical manufacturing plants or oil wells.[1] Flame structureWithin a combustion chamber containing porous media, structure of the environment can be assumed as follows. A preheating region exists prior to the surface of the flame front denoted by δp. Preheating length is marked by the beginning of the porous solid where appreciable heat transfer to the gas phase occurs and ends when the solid and gas phase reach equilibrium temperature. The region of chemical heat release, the flame, whose thickness can be given as δL, exists following the preheat region and its length is dependent upon mass flux, surface properties, and equivalence ratio. Beyond the flame, where minimal chemical heat release occurs, heat is convectively transferred from the post combustion gasses into the solid. Heat then conducts and radiates through the solid structure upstream through the flame. Within the preheating region, heat is again convectively transferred from the solid structure to the gas.[5] References1. ^1 2 3 {{cite journal|last1=Terracciano|first1=Anthony|title=Design and development of a porous heterogeneous combustor for efficient heat production by combustion of liquid and gaseous fuels|journal=Applied Energy|date=2016|volume=179|issue=1|pages=228–236|doi=10.1016/S0082-0784(81)80052-5|url=http://www.sciencedirect.com/science/article/pii/S0082078481800525}} 2. ^{{cite journal|last1=Takeno|first1=Tadao|title=A theoretical study on an excess enthalpy flame|journal=Symposium (International) on Combustion|date=1981|volume=18|issue=1|pages=465–72|doi=10.1016/j.apenergy.2016.06.128|url=http://www.sciencedirect.com/science/article/pii/S0306261916309035}} 3. ^{{cite journal|last1=Babkin|first1=V|title=Seepage gas combustion|journal=Applied Energy|date=2010|volume=87|issue=7|pages=2148–2155|doi=10.1016/j.apenergy.2009.11.010|url=http://www.sciencedirect.com/science/article/pii/S0306261909004978}} 4. ^{{cite journal|last1=Avdic|first1=F|title=Seepage gas combustion|journal=Combustion, Explosion and Shock Waves|date=1987|volume=23|issue=5|pages=531–547|doi=10.1007/BF00756535}} 5. ^1 2 {{Cite thesis |last=Terracciano |first=Anthony Carmine |title=DESIGN AND DEVELOPMENT OF HETEROGENEOUS COMBUSTION SYSTEMS FOR LEAN BURN APPLICATIONS |type=M.S.M.E |url=http://etd.fcla.edu/CF/CFE0005269/thesis_Final.pdf |year=2014 |publisher=University of Central Florida}} 1 : Combustion |
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