Second law analysis of spray evaporation

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Journal of Energy Resources Technology; (USA)

DOI:https://doi.org/10.1115/1.2905719· OSTI ID:5806739

Som, S K; Mitra, A K; Sengupta, S P ^[1]

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1. Indian Inst. of Tech., Kharagpur (India)

A second law analysis has been developed for an evaporative atomized spray in a uniform parallel stream of hot gas. Using a discrete droplet evaporation model, an equation for entropy balance of a drop has been formulated to determine numerically the entropy generation histories of the evaporative spray. For the exergy analysis of the process, the rate of heat transfer and that of associated irreversibilities for complete evaporation of the spray have been calculated. A second law efficiency ({eta}{sub II}), defined as the ratio of the total exergy transferred to the sum of the total exergy transferred and exergy destroyed, is finally evaluated for various values of pertinent input parameters, namely, the initial Reynolds number and the ratio of ambient to initial drop temperature.

• OSTI ID: 5806739
• Journal Information: Journal of Energy Resources Technology; (USA), Journal Name: Journal of Energy Resources Technology; (USA) Vol. 112:2; ISSN 0195-0738; ISSN JERTD
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ATOMIZATION
ENTROPY
EVAPORATION
FLUIDS
GASES
MATHEMATICAL MODELS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SPRAYS
THERMODYNAMIC PROPERTIES
THERMODYNAMICS